WO2021031043A1 - Procédé et dispositif de communication - Google Patents

Procédé et dispositif de communication Download PDF

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Publication number
WO2021031043A1
WO2021031043A1 PCT/CN2019/101220 CN2019101220W WO2021031043A1 WO 2021031043 A1 WO2021031043 A1 WO 2021031043A1 CN 2019101220 W CN2019101220 W CN 2019101220W WO 2021031043 A1 WO2021031043 A1 WO 2021031043A1
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WIPO (PCT)
Prior art keywords
data
type
resource
window
resource set
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PCT/CN2019/101220
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English (en)
Chinese (zh)
Inventor
黎超
张兴炜
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980099253.XA priority Critical patent/CN114223285A/zh
Priority to PCT/CN2019/101220 priority patent/WO2021031043A1/fr
Publication of WO2021031043A1 publication Critical patent/WO2021031043A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • V2X vehicle-to-everything
  • V2X includes direct communication between vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), and Vehicle-to-network (V2N) communication interaction. Except for V2N vehicles and network communication which use uplink and downlink, the other V2V/V2I/V2P data communication uses sidelink (SL) for communication.
  • V2V vehicle-to-vehicle
  • V2I vehicle-to-infrastructure
  • V2P vehicle-to-pedestrian
  • V2N Vehicle-to-network
  • SL sidelink
  • the terminal device is supported to independently select the transmission mode of resources when there is no network.
  • the transmission mode of autonomously selecting resources refers to the resources allocated by the terminal equipment to the terminal equipment by the network equipment, such as sending resources, which are used to transmit data.
  • the terminal device selects the resource, it will listen to the sending resource and obtain the sensing result.
  • Sensing refers to selecting transmission resources that are not currently occupied in the transmission resource pool for transmission by listening to the occupancy of different time-frequency resources in the transmission resource over a period of time.
  • the terminal device can exclude undetected resources and occupied detected resources from candidate resources, and for undetected resources, it can further exclude occupied resources but for data that is not periodically sent, on candidate resources
  • the previously occupied resources are not necessarily related to the subsequent positions on the candidate resources. Therefore, for data sent aperiodically, the sending resources selected by multiple terminal devices may be the same and conflict.
  • the present application provides a communication method and device, which provide a way to flexibly eliminate unavailable resources, and reduce potential interference and resource conflicts when multiple terminal devices send data.
  • a communication method includes: a first device determines a first resource set based on first control information and/or first data detected in a listening window, where the first resource set is required from Resources excluded from the selection window, the first control information is used to indicate the type of the first data; afterwards, the first device determines the transmission resource from the candidate resource set, and the candidate resource set includes the selection window Resources outside the first resource set; then, the first device sends second data on the sending resource.
  • the method may be executed by a first device, and the first device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system or a communication module in the communication device.
  • the communication device may be a terminal device or a network device.
  • the second device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system or a communication module in the communication device.
  • the communication device may be a terminal device or a network device.
  • the first resource set to be excluded from the selection window can be determined according to the type of the first data. Even if the first data is aperiodic data, try to determine the resources that the first data may occupy in the selection window in the future. , So as to exclude the resource to avoid conflicts when multiple terminal devices select the same resource when they independently select the resource.
  • the selection window is temporally located behind the listening window.
  • the first device determines the first resource set according to the first control information and/or the first data detected in the listening window, including:
  • the first device determines that the first resource set includes a first reserved resource and/or a second reserved resource, where the first reserved resource is a reserved resource indicated by the first control information, and The signal quality of the first control information is greater than a first threshold, the second reserved resource is a resource reserved for the second data, and the signal quality of the second data is greater than a second threshold.
  • the signal quality is higher, which can be considered as the resource reserved for a certain data is closer to the end position of the listening window. If the signal quality is low, it can be considered that the resource reserved for a certain data is farther than the end position of the listening window. Therefore, in the embodiment of the present application, it can be determined that when the signal quality of the first control information is greater than the first threshold, the reserved resources indicated by the first control information are excluded from the selection window, and the determined first resource set is more accurate.
  • the first device determining the sending resource from the candidate resource set includes:
  • the first device determines the transmission period from the candidate resource set according to the type of the first data and/or the type of the second data; wherein the type includes the first type or the second type;
  • the first type is used to indicate that the data is data sent periodically
  • the second type is used to indicate that the data is data sent aperiodically
  • the first type is used to indicate that there is data to be sent successively in time after the data is sent
  • the second type is used to indicate that there is no data to be sent successively in time after the data is sent
  • the first type is used to indicate that the control information corresponding to the data indicates reservation
  • the second type is used to indicate that the control information corresponding to the data does not indicate reservation
  • the first type is used to indicate that the control information corresponding to the data indicates reservation for other data
  • the second type is used to indicate that the control information corresponding to the data does not indicate reservation or indicate the pre-reservation between different retransmissions of the same data.
  • Both the first type and the second type are used to indicate the priority of data, and the priority of the first data of the first type is lower than the priority of the first data of the second type level.
  • definitions of multiple periodic services and non-periodic services are provided, which are more widely applicable.
  • the method further includes:
  • the first device determines the time length of the listening window and/or the time length of the selection window according to the type of the first data.
  • determining the time length of the selection window according to the type of the first data can match a more reasonable selection window for different services. For example, the smaller the selection window, the data is sent in a short time, and there is no need to confirm the time domain. Available resources after long. Different terminal equipment may have different delays, so that a suitable resource can be selected to send data. The larger the relative selection window, the more resources available for sending data. The greater the time delay, the larger the selection window can be used to select the best resource from the multiple available resources to reduce conflicts. The priority is high, the selection window is large, and a larger selection window can be used to select the best resource from the multiple available resources to reduce conflicts.
  • the type of the second data is the first type
  • the length of the listening window of the second data is the first time length
  • the type of the second data is the second type
  • the second data The length of the listening window is a second time length, and the first time length is greater than the second time length; and/or,
  • the type of the second data is the first type
  • the length of the selection window of the second data is the first time length
  • the type of the second data is the second type
  • the length of the second data is a second time length
  • the first time length is greater than the second time length
  • the time length and/or time domain position of the listening window of the second data is configured according to signaling; and/or,
  • the time length and/or time domain position of the selection window of the second data is configured according to signaling.
  • the reserved resources indicated by the first control information are located in the selection window, and the first resource set includes the reserved resources and/or resources occupied by the first data.
  • the initial transmission of the first data is in the listening window, and the reserved resources are used for the retransmission of the first data; or the initial transmission and retransmission of the first data In the listening window, the reserved resources are used for initial transmission and/or retransmission of the third data.
  • the reserved resource of the first data can be directly used as the excluded resource , To avoid conflicts with other terminal equipment's sending resources.
  • the type of the first data is the second type.
  • the type of the first data is the second type
  • the first resource set includes a third resource
  • the third resource is the detected data in the listening window.
  • the frequency domain resource of the first data, and the signal quality of the third resource is greater than the third threshold.
  • the detection of aperiodic services in the listening window is not necessarily related to the time domain position that appears in the selection window in the future, but the frequency domain position that appears in the selection window may have relevance, so the selected signal quality of the embodiment of this application is relatively high.
  • Large frequency domain resources can be used as exclusion resources to reduce potential interference and conflicts.
  • the third resource is a part of the subchannels in the listening window, and the priority of the data corresponding to the part of the subchannel is higher than the priority of the second data.
  • the sub-channels with higher priority may not preempt the data of the high-priority services but only the data of the lower-priority services, thereby reducing the impact on the services.
  • the time domain resources occupied by the part of the subchannels are all detected time slots in the listening window.
  • the signal quality of the third resource is the average value, maximum signal quality, minimum signal quality, median signal quality, weighted average of the signal quality of the part of the subchannels in all time slots. Any of the signal quality, etc.
  • the method further includes:
  • the first device determines an exclusion window from the selection window
  • the first device determines the first resource set from the exclusion window.
  • the exclusion window can be determined first, and the resources to be excluded are determined from the exclusion window, which can reduce the prediction range of the resources in the selection window.
  • the first device to determine an exclusion window from the selection window includes:
  • the first device determines the exclusion window from the selection window based on at least one of the following factors:
  • the manner includes a unicast manner, a multicast manner, or a broadcast manner, and the first signaling is instructed or pre-configured by the network device.
  • the first device to determine an exclusion window from the selection window includes:
  • the higher the priority of the second data the shorter the time length of the exclusion window; or the higher the priority of the second data, the longer the time length of the exclusion window.
  • the higher the priority of the second data the shorter the time length of the exclusion window, which can reserve more available resources for high-priority services.
  • the higher the priority of the second data the longer the time length of the elimination window, which can eliminate potential interference resources as much as possible for high-priority services.
  • the first device to determine the exclusion window in the selection window according to the priority of the second data includes:
  • the first device determines the exclusion window according to the correspondence between the priority and the size of the exclusion window, and the priority of the second data.
  • the first device to determine an exclusion window in the selection window includes:
  • the first device determines the exclusion window from the selection window according to the first signaling.
  • the first device to determine an exclusion window from the selection window includes:
  • the first device determines the exclusion window from the selection window according to the type of the second data; wherein,
  • the type of the second data is the first type, and the time length of the exclusion window is M transmission periods of the second data, where M is a positive integer configured by signaling, predefined or preconfigured ;or,
  • the type of the first data is the second type
  • the time length of the exclusion window is the time required for the initial transmission and retransmission of the second data to be sent, where N is a pre-defined signaling configuration Or a pre-configured positive integer.
  • the first device can determine the size of the exclusion window according to the period of the second data, that is, determine the size of the exclusion window according to the transmission delay of the service, which can reduce unnecessary exclusion operations and reduce the delay of exclusion of resources.
  • the first device determining the exclusion window from the selection window includes:
  • the first device determines the exclusion window according to the sending interval of the second data and the length of the configured exclusion window; or,
  • the size of the exclusion window is the sending interval if the sending interval is greater than the time length of the configured exclusion window.
  • the terminal device can determine the size of the exclusion window according to the time required to complete the data transmission, which can reduce unnecessary exclusion operations and reduce the time delay of exclusion of resources.
  • the first device to determine an exclusion window in the selection window includes:
  • the first device determines the exclusion window from the selection window according to the service attribute of the second data; wherein, the size of the exclusion window corresponding to different service attributes is different.
  • the first device determining an exclusion window in the selection window includes: the first device determines the exclusion window according to a subcarrier interval caused by a message for sending the second data ; Among them, the size of the exclusion window corresponding to different subcarrier intervals is different.
  • the method further includes:
  • the first device determines a second resource set based on the first control information and/or the first data detected in the listening window, where the second resource set is the number of resources that are not detected in the listening window set;
  • the first device determines the first resource set according to the second resource set.
  • the embodiment of the present application provides a way to determine the excluded resource in the selection window for the undetected resource, so as to eliminate the potential interference resource.
  • the first device determining the first resource set according to the second resource set includes:
  • the first device determines the resources to be excluded in the exclusion window according to the slot position of the second resource set and the first period, and the first period is the first period that may be sent on the second resource set.
  • the period of the type of data is the first period that may be sent on the second resource set.
  • the first device determining the sending resource from the candidate resource set includes:
  • the first device determines the first parameter according to the type of the second data
  • the first device determines the transmission resource from the candidate resource set according to the first parameter.
  • the first parameter includes:
  • a first probability and a second probability where the first probability is the probability of continuing to use existing resources to transmit data of the first type, and the second probability is the probability of continuing to use existing resources to transmit data of the second type;
  • a third threshold and a fourth threshold are used to determine the resource for transmitting the first type of data from the candidate resource set, and the fourth threshold is used to determine the resource for transmitting the second type of data from the candidate resource set.
  • Data resources or,
  • the fifth threshold and the sixth threshold is used to determine the signal quality threshold of the first resource set for the first type of data
  • the sixth threshold is used to determine the signal quality threshold of the first resource set for the second type of data Signal quality threshold.
  • the terminal device may determine the first parameter according to the type of the second data, and then determine the transmission resource from the candidate resources according to the first parameter, so that the resource excluded from the selection window matches the second data more closely, reducing the possibility of conflict.
  • the first device determines the first resource set according to the first control information and/or the second data intercepted in the listening window, including:
  • the first device determines the first resource set according to the first control information and/or the second data intercepted in the listening window, including:
  • the first device determines a first candidate resource set and a second candidate resource set from the selection window, where the first candidate resource set S1 is a set of determined usable resources, and the second candidate resource Set S2 is a set of resources occupied by the second type of data corresponding to the listening window in the selection window;
  • the first device determines the first resource set from the second candidate resource set.
  • the above technical solution can first select the deterministic unused resources, and then select the resources from the uncertain resources according to certain rules, and the selected resources can reduce the possibility of transmission conflicts.
  • a communication device in a second aspect, includes a processor for implementing the method executed by the first communication device in the first aspect.
  • the communication device may also include a memory for storing program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute program instructions stored in the memory to implement any method executed by the first device in the first aspect.
  • the communication device may also include a transceiver, and the transceiver is used for the communication device to communicate with other devices.
  • an embodiment of the present application provides a communication device, including: a processing unit, configured to determine a first resource set based on first control information and/or first data detected in a listening window, where the first resource set is For the resources that need to be excluded from the selection window, the first control information is used to indicate the type of the first data; the transmission resource is determined from the candidate resource set, and the candidate resource set includes resources other than the first resource set in the selection window; the transceiver unit uses The second data is sent on the sending resource under the control of the processing unit.
  • the communication device provided in the third aspect can be used to execute the method corresponding to the first device in the first aspect.
  • the communication device provided in the third aspect can be used to execute the method corresponding to the first device in the first aspect.
  • the communication device provided in the third aspect please refer to the foregoing embodiments, and will not be repeated here. .
  • a computer program product includes: computer program code, which when the computer program code runs on a computer, causes the computer to execute the method executed by the first device in the foregoing aspects.
  • the present application provides a chip system that includes a processor for implementing the functions of the first device in the methods of the foregoing aspects, for example, receiving or processing the data and/or data involved in the foregoing methods. Or information.
  • the chip system further includes a memory, and the memory is used to store program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a computer-readable storage medium that stores a computer program, and when the computer program is executed, the method executed by the first device in the above aspects is implemented.
  • Fig. 1 is a schematic diagram of V2X provided by an embodiment of the application.
  • FIG. 2 is a schematic diagram of excluding unavailable resources from a set of candidate resources provided by an embodiment of the application
  • FIG. 3 is a schematic diagram of excluding unavailable resources from a set of candidate resources provided by an embodiment of the application
  • FIG. 4 is a schematic diagram of excluding unavailable resources from a set of candidate resources provided by an embodiment of the application
  • FIG. 5 is a schematic diagram of a network architecture provided by an embodiment of the application.
  • FIG. 6 is a flowchart of a communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of aperiodic data determining resources provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of aperiodic data determining resources provided by an embodiment of this application.
  • FIG. 9 is a schematic diagram of aperiodic data determining resources provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of a communication device provided by an embodiment of this application.
  • FIG. 11 is a schematic diagram of a communication device provided by an embodiment of the application.
  • FIG. 12 is a schematic diagram of a communication device provided by an embodiment of the application.
  • FIG. 13 is a schematic diagram of a communication device provided by an embodiment of the application.
  • FIG. 14 is a schematic diagram of a communication device provided by an embodiment of the application.
  • Terminal devices including devices that provide users with voice and/or data connectivity, such as handheld devices with wireless connection functions, or processing devices connected to wireless modems.
  • the terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communication ( machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station) , Remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), aircraft (such as UAVs, hot air balloons, civil aviation passenger planes, etc.) or user devices, etc.
  • IoT Internet of things
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • Remote station remote station
  • access point access point
  • AP remote terminal
  • remote terminal remote terminal
  • access terminal access terminal
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, and computer-built mobile devices.
  • PCS personal communication service
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • Use such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • vehicle-mounted terminal equipment for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU).
  • OBU on-board unit
  • Network equipment such as access network (AN) equipment, such as a base station (e.g., access point), may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network
  • AN access network
  • base station e.g., access point
  • IP Internet Protocol
  • the base station can be used to convert the received air frame and Internet Protocol (IP) packets to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network.
  • IP Internet Protocol
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include a long term evolution (LTE) system or an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (advanced, LTE-A) system, Or it can also include the next generation node B (gNB) in the 5G NR system, or it can also include the centralized unit (CU) in the cloud radio access network (Cloud RAN) system. And distributed unit (DU), the embodiment of the present application is not limited.
  • LTE long term evolution
  • NodeB or eNB or e-NodeB, evolutional Node B evolutional Node B
  • LTE-A long term evolution
  • gNB next generation node B
  • CU centralized unit
  • Cloud RAN cloud radio access network
  • DU distributed unit
  • V2X in the version (Rel)-14/15/16, V2X as a major application of device-to-device (D2D) technology was successfully established.
  • V2X will optimize the specific application requirements of V2X on the basis of the existing D2D technology. It is necessary to further reduce the access delay of V2X devices and solve the problem of resource conflicts.
  • V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and Several application requirements such as vehicle-to-network (V2N) communication interaction.
  • V2V refers to the communication between vehicles
  • V2P refers to the communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers)
  • V2I refers to the communication between vehicles and network equipment, such as RSU
  • V2N refers to the communication between the vehicle and the base station/network.
  • RSU includes two types: terminal type RSU, because it is located on the roadside, the terminal type RSU is in a non-mobile state, and there is no need to consider mobility; base station type RSU can provide timing synchronization for vehicles communicating with it And resource scheduling.
  • the terms “system” and “network” in the embodiments of this application can be used interchangeably.
  • “Multiple” refers to two or more. In view of this, “multiple” may also be understood as “at least two” in the embodiments of the present application.
  • “At least one” can be understood as one or more, for example, one, two or more. For example, including at least one refers to including one, two or more, and does not limit which ones are included. For example, including at least one of A, B, and C, then the included can be A, B, C, A and B, A and C, B and C, or A and B and C.
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects.
  • first type and the second type are only for distinguishing different types, but do not indicate the difference in content, priority, or importance of the two types.
  • the first device in the present invention can be either a terminal device or a network device.
  • the scheme of the present invention can be used for both side-travel links and cellular links, which is not limited by the present invention.
  • V2X is the key technology of the future intelligent transportation system. It enables communication between vehicles, vehicles and base stations, and base stations and base stations. In this way, a series of traffic information such as real-time road conditions, road information, and pedestrian information can be obtained, thereby improving driving safety, reducing congestion, improving traffic efficiency, and providing on-board entertainment information.
  • the terminal device needs to remove the undetected resources and the corresponding position data on the detected resources from the candidate resources. That is, in the subframes for detection, the terminal equipment should remove all potential resources used when transmitting in undetected subframes in the selection window.
  • Figure 2 is a schematic diagram of excluding unavailable resources from the candidate resource set.
  • Fig. 2 includes the Sensing window and the selection window after the Sensing window in time.
  • the selection window can be considered as a defined resource set, including candidate resource sets.
  • the candidate resource set may be a set of candidate resources on all subchannels on the resource pool in all time slots in the selection window, and the candidate resources are resources when the terminal device sends and/or receives data.
  • the unit of the sub-channel in the present invention may be configured, pre-configured or predefined.
  • the size may be one physical resource block (PRB), or multiple PRBs, which may be continuous PRBs in the frequency domain, or discontinuous PRBs in the frequency domain, which is not limited in the present invention.
  • the selection window in the present invention is a collection of resources on a specific resource pool in multiple consecutive time slots or symbols.
  • the candidate resource set may be continuous or discontinuous in the time domain and/or frequency domain.
  • the resource pool is a collection of resources with a certain frequency range and frequency in the frequency domain. It can be several PRBs or sub-channels, the size and frequency position of which can be configured or pre-configured through signaling, or pre-defined, which is not limited in the present invention.
  • the resource pool may be continuous or discontinuous in the frequency domain.
  • the optional resource pool may be a transmitting resource pool, a receiving resource pool, or a resource pool used for both transmitting and receiving, which is not limited in the present invention.
  • FIG. 2 takes as an example the detected or assumed reserved period of the terminal device in the listening window is greater than or equal to 400 ms.
  • the Sensing window includes the resources of the Sensing terminal device and its reserved resources.
  • the selection window includes candidate resources of the terminal device, and FIG. 2 also includes the candidate resources of the terminal device located behind the selection window and the reserved resources thereof.
  • the terminal device can use the data in the Sensing window in the Sensing window, for example, with a period of 100 ms, or it can be considered as an existing service, so as to determine the available resources for subsequent data transmission. Since the data is sent subsequently, the available resources for the subsequent sending of data can also be considered as candidate resources for sending the data, so it is also referred to as sending resources in the following.
  • the terminal device can use a period greater than or equal to 100 ms in the Sensing window, for example, 400 ms. For data that has appeared in the Sensing window, it needs to determine whether there is a resource that conflicts with the candidate resource in a period of 400 ms outside the Sensing window. If there is a conflicting resource with the candidate resource in the candidate resource set corresponding to a period of 400 ms outside the Sensing window, the conflicting resource is excluded from the candidate resource set. Specifically, it can be based on the last collision resource to determine which of the previous selection windows should be excluded.
  • the resource that conflicts with the candidate resource in a period of 400 ms outside the Sensing window is the candidate resource of the last terminal device in Figure 2 and its reserved resource, so that the candidate resources in Figure 2 can be excluded from the candidate resources.
  • the candidate resource of the last terminal device and its reserved resource After that, the terminal device can send data on the candidate resource from which the conflicting resource is eliminated, which can reduce the conflict between the detected resource and the candidate resource used to send the data to be sent, thereby reducing unnecessary interference.
  • FIG. 3 is a schematic diagram of excluding unavailable resources from the candidate resource set.
  • FIG. 3 is similar to FIG. 2 except that the reserved period of the sensing terminal device shown in FIG. 3 is less than 100 ms, for example, 20 ms. Since the reservation period of the sensing terminal device is small, it is necessary to consider multiple candidate resource sets corresponding to the reservation period of the sensing terminal device outside the Sensing window, for example, whether there are conflicts with the candidate resources in the five candidate resource sets shown in Figure 3 H. For example, the last reserved resource, that is, the resource numbered 5 conflicts with the candidate resource.
  • FIG. 4 is a schematic diagram of excluding unavailable resources from the candidate resource set.
  • Fig. 4 is similar to Fig. 3, except that the reserved period of the sensing terminal device shown in Fig. 4 is less than 100 ms, for example, 50 ms. This needs to consider whether there are resources that conflict with the candidate resources in the two candidate resource sets outside the Sensing window. For example, the last reserved resource, that is, the resource numbered 2 conflicts with the candidate resource.
  • Figures 2 to 4 all take the terminal device periodically sending data, that is, the data is sent periodically as an example.
  • the data sent by the terminal device may be non-periodic.
  • the terminal device detects the data that has appeared in the sensing window, and can determine that data has appeared in the sensing window. Since the data is aperiodic data, the aperiodic data may not necessarily be related to the resource that the selection window eliminates conflicts. Therefore, if the current method of excluding potentially conflicting resources in the selection window is used, a judgment error may be made, and the available candidate resources are determined as the resources to be excluded, resulting in a waste of resources.
  • the first resource set is determined according to the detected control information and/or first data in the sensing window, that is, the resource that needs to be excluded from the selection window, and then the first resource set is excluded from the selection window.
  • the remaining candidate resources out of a resource set are collectively determined candidate resources for transmitting the second data.
  • the first resource set can be determined according to whether the first data is periodic, and try to avoid excluding available resources and save resources. At the same time, it helps to determine the resources to be excluded more flexibly for different data.
  • the technical solutions provided by the embodiments of the present application may be applied to 5G systems, or applied to future communication systems or other similar communication systems.
  • the technical solutions provided by the embodiments of the present application can be applied to cellular links, and can also be applied to links between devices, such as device-to-device (D2D) links.
  • the D2D link can also be called a sidelink, and the side link can also be called a side link or a secondary link.
  • the aforementioned terms all refer to links established between devices of the same type, and have the same meaning.
  • the so-called devices of the same type can be the link between the terminal device and the terminal device, the link between the base station and the base station, and the link between the relay node and the relay node.
  • V2X link For the link between the terminal device and the terminal device, there are D2D links defined by 3GPP version (Rel)-12/13, and there are also car-to-car, car-to-mobile, or car-to-any entity defined by 3GPP for the Internet of Vehicles.
  • V2X link including Rel-14/15. It also includes the V2X link based on the NR system of Rel-16 and subsequent versions that are currently being studied by 3GPP.
  • FIG. 5 is a network architecture applied in the embodiment of this application.
  • Figure 5 is a schematic diagram of a V2X network architecture.
  • Figure 5 includes three terminal devices and four network devices.
  • the three terminal devices are UE1, UE2, and UE3, and the four network devices are two base stations, one RUS and one Global Navigation Satellite System (Global Navigation Satellite System). System, GNSS).
  • Network devices correspond to different devices in different systems.
  • 4G 4th generation
  • eNBs eNode B
  • 5G 5G
  • V2X terminal equipment can also be called vehicle-mounted equipment. Vehicle-mounted equipment can communicate with each other to realize information exchange and information sharing. For example, vehicle linkage status information including vehicle location and driving speed can be used to determine road traffic conditions.
  • RSU can communicate with various vehicle-mounted equipment and/or base station equipment, and can be used to detect road surface conditions and guide vehicles to choose the best driving path.
  • the base station communicates with each vehicle-mounted device and/or RSU, and GNSS can provide positioning and timing information for other network elements.
  • the in-vehicle equipment in the Internet of Vehicles can also communicate with people.
  • Specific users can communicate with the vehicle through wireless communication means such as Wi-Fi, Bluetooth, and cellular, so that the user can monitor and control the vehicle through the corresponding mobile terminal device.
  • the three UEs and RUS can all be covered by two base stations, and each base station can communicate with the three UEs and RUS.
  • the base station in Figure 5 is optional.
  • the terminal device in FIG. 5 may be a V2X terminal device, such as a vehicle-mounted terminal device or a vehicle as an example, but the terminal device in the embodiment of the present application is not limited thereto.
  • Each of the above-mentioned devices can communicate with each other through the side link and the uplink and downlink, and the spectrum of the cellular link can be used for communication, and the intelligent traffic spectrum near 5.9 GHz can also be used.
  • the technology for each device to communicate with each other can be enhanced based on the communication network protocol (such as the LTE protocol), and can be enhanced based on the D2D technology.
  • the embodiment of the present application provides a communication method. Please refer to FIG. 6, which is a flowchart of the method. In the following introduction process, the application of this method to the network architecture shown in FIG. 5 is taken as an example.
  • the method may be executed by a communication device, which may be a terminal device or a communication device (such as a chip system) capable of supporting the terminal device to implement the functions required by the method.
  • the method executed by the terminal device is taken as an example, that is, the communication device is an example of the terminal device.
  • the terminal device below may be any one of the terminal devices in FIG. 5, such as a vehicle-mounted device, or RUS. It should be noted that the embodiment of the present application only takes execution through a terminal device as an example, and is not limited to this scenario.
  • FIG. 6 is a flow chart of the method. The flow of the method is described as follows.
  • the terminal device determines the first resource set according to the first control information and/or the first data detected in the listening window.
  • the first control information can be considered as information for scheduling the first data.
  • the terminal device can sense the data that has appeared in the listening window, and determine the resources that may need to be occupied for subsequent data transmission from the selection window based on the detection result, so that when other data needs to be sent, the occupied data Resources are excluded from the selection window in advance. For example, take the data that appeared in the sensing window sensing as the first data, and other data as the second data, that is, the second data is sent after the first data.
  • the terminal device senses the first data that has appeared in the listening window, and determines from the selection window the resources that may need to be occupied for subsequent transmission of the first data according to the detection result, so that when sending the second data, it will be used from the selection window in advance.
  • the terminal device can select the resources for sending the first data among the remaining resources in the selection window except for the resources for sending the first data to reduce the transmission rate. The probability that the first data and the second data may conflict.
  • the data that the terminal device has sensed in the listening window can be the first data that the terminal device has sensed in the listening window, for example; it can also be the first control information that the terminal device has sensed in the listening window. Or, it can also be the first control information and the first data that the terminal device senses in the listening window.
  • the selection window is located after the listening window in time, that is, the end position of the listening window is before the start position of the selection window, or the end position of the listening window and the start position of the selection window overlapping.
  • the moment when the first data reaches the bottom layer (such as the physical layer) of the first device from the upper layer (such as the protocol stack) of the first device is located between the listening window and the selection window.
  • the selection window here may include a candidate resource set.
  • the candidate resource set may be candidate resources on all subchannels in the resource pool on all time slots in the selection window.
  • the selection window can also include unavailable resources.
  • the unavailable resources here refer to the resources being occupied by other services when the current data is sent.
  • the terminal device can exclude unavailable resources from the selection window, that is, obtain a candidate resource set, and then select a sending resource from the candidate resource set.
  • the resources that need to be excluded from the selection window are referred to as the first resource set hereinafter.
  • the terminal device may configure the size of the listening window in advance, or the size of the selection window.
  • the size of the listening window can be considered as the time length of the listening window in the time domain, or it can also be considered as the time domain resource occupied by the listening window, or it can also be considered as the time domain position of the listening window.
  • the size of the selection window can be considered as the time length of the selection window in the time domain, or can also be considered as the time domain resources occupied by the selection window, or can also be considered as the time domain position of the selection window.
  • the terminal device can configure the start position and end position of the listening window; or the terminal device can configure the start position and the length of the listening window; or the terminal device can configure the listening window The end position and the length of the listening window.
  • the terminal device can configure the start position and end position of the selection window; or the terminal device can configure the start position of the selection window and the length of the listening window; or the terminal device can configure the end position and listening of the selection window The length of the window.
  • the terminal device may configure the size of the listening window or the size of the selection window according to the type of the second data to be sent.
  • the size of the listening window can be considered as the length of the listening window in the time domain, which is also called the time length.
  • the size of the selection window is also called the time length of the selection window.
  • the type of data here can be defined according to the characteristics of the business. For example, if the business is a non-periodic business, the type of data can be aperiodic, while if the business is a periodic business, the data type can be a periodic type. As an implementation manner, the type of data includes a first type and a second type, and the content indicated by the first type and the second type may include but is not limited to the following.
  • the first type in some instances, the first type may be used to indicate that the data is periodically sent data; the second type may be used to indicate that the data is non-periodically sent data. In other examples, the first type may be used to indicate that the data is data sent aperiodically; the second type may be used to indicate that the data is data sent periodically.
  • the second type of data can refer to data sent by only one or a few MAC TBs.
  • the sent TBs will not be sent continuously in a certain period, but are sent intermittently according to the arrival of upper layer data.
  • the second type of data can also be considered as a service that does not reserve the next data in a certain period after a data packet is transmitted; or after a data packet is transmitted, although There is a reservation for new data later, but the transmission period between multiple old and new data is not fixed, that is, although the reservation is made, it is not fixed, so there is no reservation period.
  • the first type can be used to indicate that there is data to be sent successively in time after the data is sent. For example, if the terminal device is performing a periodic service, then after the terminal device sends the data once, There is still data to be sent in the future; the second type is used to indicate that there is no data to be sent in time after the data is sent. For example, if the terminal device is performing a periodic service, then the terminal device may be There is no data to send.
  • the first type may be used to indicate that the data is data of a periodic service
  • the second type may be used to indicate that the data is data of a non-periodic service.
  • the first type can be used to indicate that there is no data to be sent successively in time after the data is sent; the second type can be used to indicate that there is still data to be sent successively in time after the data is sent.
  • the data can be used to indicate that there is data to be sent successively in time after the data is sent.
  • the first type may be used to indicate that the control information corresponding to the data indicates reservation; the second type may be used to indicate that the control information corresponding to the data does not indicate reservation. In other instances, the second type may be used to indicate that the control information corresponding to the data does not indicate reservation; the first type may be used to indicate that the control information corresponding to the data indicates reservation.
  • the control information for scheduling the data of the service may include an indication information, and the indication information may be used to indicate whether resources are reserved for the service or the data. If the control information indicates that resources are reserved for the data, it can be considered that the data is the first type of data. In contrast, if the control information indicates that no resources are reserved for the data, the data can be considered to be the second type of data.
  • the first type can be used to indicate that the control information corresponding to the data indicates reservation for other data; the second type can be used to indicate that the control information corresponding to the data does not indicate reservation or indicates the same Reservation between different retransmissions of data.
  • the first type can be used to indicate that the control information corresponding to the data does not indicate the reservation from the initial transmission to the retransmission or the reservation between different retransmissions of the same data; the second type can be used The control information corresponding to the indicated data indicates the reservation of other data.
  • scheduling the terminal device to send control information such as the first data may indicate that resources are reserved for other data, such as second data, in addition to indicating that resources are not reserved for the first data.
  • the first data can be considered to be the first type of data.
  • the control information of the first data indicates that no resources are reserved for the first data
  • the first data can be considered to be the first data of the second type.
  • the control information indicates that the initial transmission of the first data reserves resources for one or more retransmissions of the first data.
  • both the first type and the second type are used to indicate the priority of data, and the priority of the first data of the first type is lower than the priority of the first data of the second type.
  • both the first type and the second type are used to indicate the priority of data, and the priority of the first data of the first type is higher than the priority of the first data of the second type.
  • configuring the size of the listening window by the terminal device according to the type of the second data includes but is not limited to the following three configuration methods.
  • the terminal device can configure a listening window corresponding to the second type for the second type of data.
  • the terminal device can configure a shorter listening window for the second type of data.
  • the shorter here is relative to the length of the listening window configured for the first type of data.
  • the type of the second data is the first type, and the length of the listening window of the second data is the first time length; the type of the second data is the second type, and the length of the listening window of the second data is the first time. Two time lengths, the first time length is greater than the second time length.
  • the length of the listening window configured by the terminal device for the first type of data is the same as the length of the listening window configured by the terminal device for the second type of data.
  • the size of the listening window configured by the terminal device can be the start position and end position of the configured listening window, the start position and time length of the configured listening window, or the size of the configured listening window.
  • the end position and the length of time, which are used specifically, are not limited in the embodiment of the present application.
  • the terminal device detects the second type of data in the listening window, the second type of data detected in the listening window far away from the selection window may not necessarily appear in the selection window. Therefore, it is only necessary to detect the result of Sensing in the time window closer to the selection window. If the terminal device detects the first type of data in the listening window, it needs to analyze the sensing result in the entire listening window.
  • the terminal device configures the size of the selection window according to the type of the second data, including but not limited to the following three configuration methods.
  • the terminal device can configure a shorter selection window for the second type of data.
  • the shorter here is relative to the length of time selected for the first type of data configuration.
  • the type of the second data is the first type, and the length of the selection window of the second data is the first time length; the type of the second data is the second type, and the selected length of the second data is the second time length ,
  • the first time length is greater than the second time length.
  • the smaller the selection window the data is sent within 3ms, for example, and there is no need to confirm resources other than 100ms, for example. Different terminal equipment may have different delays, so that a suitable resource can be selected to send data.
  • the larger the relative selection window the more resources available for sending data.
  • the terminal device can configure the size of the window according to the signaling configuration.
  • the signaling may be sent by a network device.
  • the signaling may be a system message, RRC signaling, or downlink control information DCI (Downlink Control Information), and the signaling may carry the length of time to indicate the size of the selection window .
  • DCI Downlink Control Information
  • the terminal device can configure the size of the selection window according to at least one of the period, delay, and priority of the second data.
  • the larger the time delay the larger the selection window can be used to select the best resource from the multiple available resources to reduce conflicts.
  • the priority is high, the selection window is large, and a larger selection window can be used to select the best resource from the multiple available resources to reduce conflicts.
  • the size of the terminal device configuration selection window can be the start position and end position of the configuration selection window, the start position and time length of the configuration selection window, or the end position and time of the configuration selection window.
  • the specific length is not limited in the embodiment of the present application.
  • the terminal device After the terminal device is configured with the listening window and the selection window, or after the listening window and the selection window are determined, it can be determined based on the first control information and/or first data detected in the listening window to exclude from the selection window Resources, hereinafter also referred to as the first resource set.
  • the terminal device may determine the first resource set according to the detection result of the listening window and the type of the second data. Different detection results and different types of the second data have different results for determining the first resource set. The following are different detection results and the type of the second data. If the first resource set is determined, it is received.
  • the terminal device detects that the first data appears in the listening window, and the first data is of the second type, and the type of the second data is also the second type.
  • the reserved resources in the listening window are located in the part of the selection window. That is, the first resource set includes the resources occupied by the first data and/or the reserved resources indicated by the first control information, and the reserved resources are located in the selection window.
  • the reserved resources indicated by the first control information may be resources reserved for retransmission of the first data. If the initial transmission of the first data is in the listening window, but the resource for retransmission of the first data is reserved in the selection window, then the resource should be excluded.
  • the reserved resource indicated by the first control information may be a resource reserved for third data different from the first data, and the pre-transmission If the reserved resource is used for the initial transmission and/or retransmission of the third data, and the reserved resource is within the selection window, then the reserved resource should be excluded.
  • FIG. 7 is a schematic diagram of determining resources for aperiodic data. It can be seen from Figure 7 that the initial transmission and retransmission resources of the first data are 5, and the reserved resources for the initial transmission and/or retransmission of the third data indicated by the first control information are resource 6, so the first resource set should It includes resource 5 and resource 6, which is resource 8 as shown in FIG. 7.
  • the embodiment of the present application can determine the signal quality of the first control information, and determine whether to exclude the above-mentioned resources reserved for corresponding aperiodic data from the selection window according to the signal quality of the first control information.
  • the signal quality of the first control information may be considered as the signal quality of the channel carrying the first control information. If the signal quality is high, it can be considered that the resource reserved for a certain data is closer to the end position of the listening window. If the signal quality is low, it can be considered that the resource reserved for a certain data is farther than the end position of the listening window.
  • the first threshold here may be a preset threshold.
  • the second reserved resource is a resource reserved for the second data whose signal quality is greater than the second threshold.
  • the type of the first data detected in the listening window is the second type, that is, the first data is aperiodic data
  • the embodiment of the present application can count the sub-channels where the first data is detected in the listening window, and use the sub-channels where the first data to occupy the total sub-channels included in the listening window. Resources occupied by historical aperiodic data are excluded from the listening window. If the above ratio is large, it can be considered that the data appearing on the sub-channel is aperiodic data with greater probability. Therefore, the embodiment of the present application can count the energy on the same sub-channel position on all sub-frames in the listening window, and determine which sub-channel resources are excluded according to the energy, thereby reducing potential interference and conflict.
  • the resources on the excluded subchannels are referred to as third resources, that is, the first resource set includes the third resources.
  • the embodiment of the present application may determine the average value of the signal quality, the maximum value of the signal quality, the minimum value of the signal quality, or the maximum value of the signal quality of the sub-channels where the first data has appeared in the listening window.
  • the average value of the signal quality, the maximum value of the signal quality, the minimum value of the signal quality, or the maximum value of the signal quality and the minimum signal quality is collectively referred to as signal quality.
  • the high signal quality indicates that there are available resources closer to the terminal equipment.
  • a resource whose signal quality is greater than the third threshold is determined as the third resource.
  • the third threshold may be a preset threshold, for example, the third threshold may be set according to the priority of data.
  • the embodiment of the present application may only count the sub-channels whose service priority is higher than the data priority, and determine the signal quality of the statistical sub-channels.
  • the higher priority means that instead of preempting the data of the high-priority business, it can only preempt the data of the lower-priority business, thereby reducing the impact on the business.
  • the terminal device detects the presence of the first data in the listening window, and the first data is of the first type, and the type of the second data is also of the second type.
  • the terminal device determines the first resource set from the selection window in the same manner as in the first case.
  • the resources that need to be excluded from the selection window include resources reserved for the first data. For details, refer to the description of the first case above. , I won’t repeat it here.
  • the difference from the first case is that the listening window in the second case is different from the listening window in the first case.
  • the first resource set includes a window to determine excluded resources
  • the terminal device detects the presence of the first data in the listening window, and the first data is of the second type, and the type of the second data is also the first type.
  • the method for the terminal device to determine the first resource set from the selection window is similar to that in the first case.
  • the terminal device can determine that the resources that need to be excluded from the selection window include the resources reserved for the first data. For details, refer to the first The description of this situation will not be repeated here.
  • the terminal device detects that the first data appears in the listening window, and the first data is of the first type, and the type of the second data is also the first type.
  • the embodiment of the present application determines the resource to be excluded from the selection window, that is, before the first resource set, the exclusion window may be determined in the selection window.
  • the exclusion window may include reserved resources, and the reserved resources are used for the first resource set.
  • the retransmission of one piece of data is used for the initial transmission or retransmission of the aforementioned third data, and then the first resource set is determined from the exclusion window to determine the first resource set as accurately as possible.
  • the embodiment of the present application may be based on the priority of the second data, the type of the second data, the service attribute of the second data, the transmission mode of the second data, and the signaling slave for configuring the size of the exclusion window.
  • the selection window determine the excluded window.
  • the exclusion window may be determined from the selection window according to the priority of the second data.
  • Figure 8 is a schematic diagram of determining the time length of the exclusion window.
  • Pi in Figure 8 represents the priority level.
  • the higher the priority of the second data the smaller the time length of the exclusion window.
  • the priority may correspond to the number of detection cycles.
  • the priority of the second data is P1
  • the time length of the exclusion window may be 1 data cycle, that is, it is only necessary to determine whether there is a reservation in 1 data cycle. Resources.
  • the priority of the second data is P2
  • the time length of the exclusion window can be 2 data cycles, that is, it only needs to determine whether there are reserved resources in 2 data cycles.
  • the time length of the exclusion window corresponding to different priorities may also be different.
  • the time length of the exclusion window corresponding to priority P1 is T1; for example, the time length of the exclusion window corresponding to priority P2 is T2.
  • the corresponding relationship between the priority and the time length of the exclusion window can be established in advance, so that the terminal device can determine the time length of the exclusion window from the selection window according to the corresponding relationship and the priority of the second data.
  • the higher the priority of the second data the longer the time length of the exclusion window.
  • the shorter the time length of the exclusion window is.
  • the priority when the priority is higher than the preset threshold, it only detects whether there are reserved resources within the preset threshold. If the priority of the second data is lower than the preset threshold, it is possible to detect whether there are reserved resources on an exclusion window with a shorter time length. This can eliminate potential interference resources as much as possible for high-priority services.
  • the size of the exclusion window is configured by signaling. This method can try to ensure a balance between performance and flexibility.
  • the terminal device can determine the size of the exclusion window according to the configuration of the signaling.
  • this signaling may be configured for each terminal device, may also be configured for a certain terminal device group, or may be configured for a resource pool.
  • the terminal device may determine the size of the exclusion window according to the period of the second data. In this way, the size of the exclusion window is determined according to the transmission delay of the service, which can reduce unnecessary exclusion operations and reduce the delay of exclusion of resources.
  • the size of the exclusion window may be the size of one or several exclusion windows. That is, the time length of the exclusion window may be the time length of one or more exclusion windows, where the time length of the one or more exclusion windows may be specifically determined according to the period of the second data.
  • the terminal device can determine the size of the exclusion window according to the time required to finish sending the data. For example, the terminal device may determine that the size of the exclusion window is an integer multiple of the time required to send the data. For example, it takes 2ms to send the current aperiodic data, and the time length of the exclusion window can be configured to be an integer multiple of 2ms, that is, at least a time window of 2ms.
  • the terminal device can determine the size of the exclusion window according to the period of the second data and the size of the exclusion window configured (selected).
  • the period of the second data and the size of the exclusion window of the configuration (selection) from which the terminal device can be used according to the smaller or larger value of the two are used as the window used when the periodic service excludes resources.
  • the terminal device determines the size of the exclusion window according to the message type or the service attribute of the second data or the terminal device configures the size of the exclusion window according to the message type or the service attribute of the second data.
  • the size of the exclusion window is set according to the business of different attributes, so that the exclusion resource can be selected adaptively for different services.
  • the time length of the exclusion window may be set to, for example, 100 ms.
  • the time length of the exclusion window can be set, for example, 50 ms.
  • the time length of the exclusion window can be set, such as 10ms or 20ms.
  • the foregoing embodiment describes how the terminal device determines the resource to be excluded in the selection window when the terminal device detects the resource in the listening window.
  • the following describes how to determine the resources to be excluded in the selection window when resources are not detected in the listening window.
  • the terminal device in the listening window, there will always be some time slots that the terminal device does not receive or detect. For example, due to the half-duplex limitation of the terminal equipment, when data is sent on this carrier or other carriers, no detection is performed in the listening window in the current resource pool or part of the bandwidth.
  • the terminal device may determine the second resource set according to the first control information and/or the first data detected in the listening window.
  • the second resource set here is a set of resources that have not been detected in the listening window, for example, the set of resources shown in the black area in FIG. 9. The terminal device then determines the first resource set from the second resource set.
  • the terminal device may determine the slot position in the exclusion window for excluding the second data in the second resource set according to the slot position of the second resource set and the period of data that may be sent on the second resource set. .
  • the time slot positions of the second data in the exclusion window are collectively referred to as the third set, and the third set is the resource to be excluded.
  • the terminal device may determine the third set according to the slot position of the second resource set and the interval between multiple retransmissions of the first data. That is, periodic resources can be excluded from time slots that have never been detected for aperiodic services.
  • the embodiment of the present application can determine the transmission time of the current data transmission.
  • the time slot positions where various second data may appear in the window are excluded, that is, the third set.
  • the sending time window can be considered as the maximum time length of the time window allowed to send the current data packet, such as 1ms, 2ms, 3ms, 5ms, 10ms, etc.
  • the length of the sending time window can be determined by the current data to be sent The time delay characteristic of confirming.
  • the third set can be determined by formula (1).
  • y is the time slot not to be excluded
  • P rsvp_TX is the period of service to be transmitted
  • z is the number of the undetected time slot
  • Pstep is the unit of the possible period of the periodic service
  • P k is the possible period of the periodic service.
  • the period of occurrence, q is the number of periods of the periodic service to be detected.
  • the embodiment of the present application can be based on the time slot position of the second resource set And the possible period of the first type of data sent on the second resource set, determine the slot position of the second data in the selection window, that is, the fourth set, that is, the resource that needs to be excluded.
  • the terminal device determines a candidate resource for the second data from the selection window according to the first resource set.
  • the terminal device After the terminal device determines the first resource set, that is, the resource that needs to be excluded from the selection window when sending the second data, it may exclude the first resource set from the selection window to obtain candidate resources.
  • the terminal device sends the second data on the candidate resource.
  • the terminal device When the terminal device sends the second data on the candidate resource, it may select the sending resource required for sending the second data on the candidate resource, and then send the second data on the determined sending resource.
  • the transmission resource selected by the terminal device is also different.
  • the terminal device may determine the first parameter according to the type of the second data, and then determine the transmission resource from the candidate resources according to the first parameter.
  • the first parameter may include a first probability and a second probability.
  • the first probability may be the probability of continuing to use the existing resources to transmit the first type of data.
  • the second probability may be the probability of continuing to use the existing resources to transmit the second type of data.
  • an embodiment of the present application may configure a pair of probabilities ⁇ P1, P2 ⁇ , where P1 corresponds to the first type of data, and P2 corresponds to the second type of data.
  • the first type of data continues to use existing resources according to P1, and uses (1-P1) to reselect resources or trigger random resource selection.
  • the first type of data continues to use existing resources according to P2, and uses (1-P2) to reselect resources or trigger random resource selection.
  • the first parameter may include a first threshold and a second threshold.
  • the first threshold is used to determine the ratio of candidate resources for transmitting the first type of data to the total resources in the selection window
  • the second threshold is used to determine the ratio of candidate resources for transmitting the second type of data to the total resources in the selection window.
  • a set of parameters ⁇ Th1, Th2 ⁇ may be configured respectively.
  • set The threshold is higher.
  • candidate resources may be selected according to different thresholds.
  • the first parameter may include a third threshold and a fourth threshold.
  • the third threshold is used for the first type of data to determine the signal quality threshold of the first resource set
  • the fourth threshold is used for the second type of data to determine the signal quality threshold of the first resource set.
  • different signal quality thresholds may be configured for the resources that have appeared for the second type of data and the resources that have appeared for the first type of data. For example, the exclusion threshold of the first type of data is lower, and the exclusion threshold of the second type of data is higher.
  • the first parameter may include a fifth threshold and a sixth threshold.
  • the fifth threshold is used for the first type of data to increase the threshold of the signal quality of the candidate resource.
  • the sixth threshold is used for the second type of data to increase the threshold of the signal quality of the candidate resource.
  • different values for adjusting the signal quality threshold may be configured for the first type of data and the second type of data. For example, configure 3dB for the first type of data, and configure 6dB for the second type of data.
  • the present application may divide the detection resources in the selection window into two sets, and the two sets are S and S2.
  • SI is a set of determined available resources, which can be a set of unused and occupied resources, where unused refers to the resources reserved for the first type of data and the second type of data and the first The second type of data is clearly released resources; occupied resources refer to resources whose PSSCH signal quality is lower than a preset threshold.
  • S2 may be a resource that has been used by the second type of data and the signal quality is below a threshold. In this way, certain unused resources can be selected first, and then resources can be selected from uncertain resources according to certain rules, and the selected resources can reduce the possibility of transmission conflicts.
  • the terminal device can directly select the sending resource in S1. Otherwise, for example, if S1 is less than a preset threshold, first select all resources from S1, and then select the resource with the lowest signal quality from S2 to obtain candidate resources.
  • the method provided in the embodiments of this application is introduced from the perspective of a terminal device.
  • the terminal device may include a hardware structure and/or software module, and realize the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above-mentioned functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • FIG. 10 shows a schematic structural diagram of a communication device 1000.
  • the communication apparatus 1000 may be a first device, for example, a terminal device can realize the function of the terminal device in the method provided in the embodiment of this application; the communication device 1000 may also be able to support the terminal device to implement the corresponding method in the method provided in the embodiment of this application Functional device.
  • the communication device 1000 may be a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device 1000 can be realized by a chip system. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.
  • the communication device 1000 may include a processing unit 1001 and a transceiving unit 1002.
  • the processing unit 1001 may be used to perform steps S61 and S62 in the embodiment shown in FIG. 6, and/or used to support other processes of the technology described herein.
  • the transceiver unit 1002 is used for the communication device 1000 to communicate with other modules, and it may be a circuit, a device, an interface, a bus, a software module, a transceiver, or any other device that can implement communication.
  • the transceiver unit 1002 may be used to perform step S63 in the embodiment shown in FIG. 6 and/or to support other processes of the technology described herein.
  • Figure 11 shows the communication device 1100 provided by an embodiment of the application, where the communication device 1100 may be a first device, such as a terminal device, which can implement the function of the terminal device in the method provided in the embodiment of the application; the communication device 1100 is also It may be a device that can support the terminal device to implement the corresponding function in the method provided in the embodiment of the present application.
  • the communication device 1100 may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the foregoing transceiver unit 1002 may be a transceiver, and the transceiver is integrated in the communication device 1100 to form a communication interface 1110.
  • the communication device 1100 includes at least one processor 1120, configured to implement or support the communication device 1100 to implement the functions of the terminal device in the method provided in the embodiments of the present application.
  • the processor 1120 may be configured to determine a first resource set according to the first control information and/or first data detected in the listening window.
  • the first resource set is a resource that needs to be excluded from the selection window.
  • the control information is used to indicate the type of the first data; the sending resource is determined from the candidate resource set, and the candidate resource set includes resources other than the first resource set in the selection window.
  • the communication device 1100 may further include at least one memory 1130 for storing program instructions and/or data.
  • the memory 1130 and the processor 1120 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1120 may cooperate with the memory 1130 to operate.
  • the processor 1120 may execute program instructions stored in the memory 1130. At least one of the at least one memory may be included in the processor.
  • the communication apparatus 1100 may further include a communication interface 1110 for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 1100 can communicate with other devices.
  • the processor 1120 may use the communication interface 1110 to send and receive data.
  • the communication interface 1110 may specifically be a transceiver.
  • connection medium between the communication interface 1110, the processor 1120, and the memory 1130 is not limited in the embodiment of the present application.
  • the memory 1130, the processor 1120, and the communication interface 1110 are connected by a bus 1140.
  • the bus is represented by a thick line in FIG. 11, and the connection mode between other components is only for schematic illustration. , Is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used to represent in FIG. 11, but it does not mean that there is only one bus or one type of bus.
  • the processor 1120 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the memory 1130 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory (volatile memory). For example, random-access memory (RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function, for storing program instructions and/or data.
  • the communication device in the foregoing embodiment may be a terminal or a circuit, and may also be a chip applied to a terminal or other combination devices or components with the foregoing terminal functions.
  • the transceiver unit may be a transceiver, which may include an antenna and a radio frequency circuit, etc.
  • the processing module may be a processor, for example, a central processing unit (CPU).
  • the transceiver unit may be a radio frequency unit
  • the processing module may be a processor.
  • the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.
  • Fig. 12 shows a schematic structural diagram of a simplified communication device. It is easy to understand and easy to illustrate.
  • the communication device uses a mobile phone as an example.
  • the communication device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, control the communication device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of communication devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 12 only one memory and processor are shown in FIG. 12. In an actual communication device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with the transceiver function may be regarded as the transceiver unit of the communication device, and the processor with the processing function may be regarded as the processing unit of the communication device.
  • the communication device includes a transceiving unit 1210 and a processing unit 1220.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1210 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1210 as the sending unit, that is, the transceiver unit 1210 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 1210 is used to perform the sending and receiving operations on the communication device side in the foregoing method embodiment, and the processing unit 1220 is used to perform other operations on the communication device in the foregoing method embodiment except for the transceiving operation.
  • the transceiver unit 1210 may be used to perform step S63 in the embodiment shown in FIG. 6 and/or to support other processes of the technology described herein.
  • the processing unit 1220 is configured to perform steps S61 and S62 in the embodiment shown in FIG. 6 and/or to support other processes of the technology described herein.
  • the chip When the communication device is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface;
  • the processing unit is a processor or microprocessor or integrated circuit integrated on the chip.
  • the device can perform functions similar to the processing unit 1120 in FIG. 11.
  • the device includes a processor 1310, a data sending processor 1320, and a data receiving processor 1230.
  • the processing unit 701 or the processing unit 801 in the foregoing embodiment may be the processor 1310 in FIG. 13 and perform corresponding functions.
  • the transceiving unit 702 or the transceiving unit 802 in the foregoing embodiment may be the sending data processor 1320 and/or the receiving data processor 1330 in FIG. 13.
  • the channel encoder and the channel decoder are shown in FIG. 13, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.
  • the terminal device 1400 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the terminal device in this embodiment can be used as the modulation subsystem therein.
  • the modulation subsystem may include a processor 1403 and an interface 1404.
  • the processor 1403 completes the function of the aforementioned processing unit 1001, and the interface 1404 completes the function of the aforementioned transceiver unit 1002.
  • the modulation subsystem includes a memory 1406, a processor 1403, and a program stored in the memory 1406 and running on the processor.
  • the processor 1403 implements the first terminal in the foregoing method embodiment when the program is executed.
  • Device or second terminal device method It should be noted that the memory 1406 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1400, as long as the memory 1406 can be connected to the The processor 1403 is sufficient.
  • An embodiment of the present application also provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the method executed by the first device in FIG. 6.
  • An embodiment of the present application also provides a computer program product, including instructions, which when run on a computer, cause the computer to execute the method executed by the first device in FIG. 6.
  • the embodiment of the present application provides a chip system, which includes a processor and may also include a memory, configured to implement the function of the first device in the foregoing method.
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • a computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc., which includes one or more Magnetic tape), optical media (for example, digital video disc (DVD for short)), or semiconductor media (for example, SSD).
  • a computer or a data storage device such as a server, data center, etc., which includes one or more Magnetic tape), optical media (for example, digital video disc (DVD for short)), or semiconductor media (for example, SSD).

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

Abstract

L'invention concerne un procédé et un dispositif de communication. Le procédé comprend : un premier appareil déterminant un premier ensemble de ressources selon des premières informations de commande et/ou des premières données détectées dans une fenêtre de détection, le premier ensemble de ressources comprenant des ressources qui doivent être exclues d'une fenêtre de sélection, et les premières informations de commande étant utilisées pour indiquer un type de premières données ; le premier appareil déterminant une ressource de transmission à partir d'un ensemble de ressources candidates, l'ensemble de ressources candidates comprenant des ressources dans la fenêtre de sélection et non dans les ressources du premier ensemble de ressources ; et le premier appareil transmettant des secondes données sur la ressource de transmission. Le procédé facilite la réduction des interférences potentielles et des conflits de ressources survenant lorsque de multiples appareils terminaux transmettent des données.
PCT/CN2019/101220 2019-08-16 2019-08-16 Procédé et dispositif de communication WO2021031043A1 (fr)

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WO2024027629A1 (fr) * 2022-08-03 2024-02-08 华为技术有限公司 Procédé de transmission d'informations et appareil associé

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