WO2022152208A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2022152208A1
WO2022152208A1 PCT/CN2022/071792 CN2022071792W WO2022152208A1 WO 2022152208 A1 WO2022152208 A1 WO 2022152208A1 CN 2022071792 W CN2022071792 W CN 2022071792W WO 2022152208 A1 WO2022152208 A1 WO 2022152208A1
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WIPO (PCT)
Prior art keywords
resource
candidate
resource set
window
message
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PCT/CN2022/071792
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English (en)
Chinese (zh)
Inventor
黎超
张天虹
黄海宁
杨帆
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华为技术有限公司
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Publication of WO2022152208A1 publication Critical patent/WO2022152208A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus.
  • the terminal device may detect possible sidelinks at every set step size (eg Pstep) on some time domain resources on the time axis.
  • the terminal device can then select time-frequency resources for transmission within a selection window based on the detection results of these partial perceptions.
  • the selected step size Pstep is not less than the period of the actually transmitted periodic service, for example, when the period of the LTE-V periodic service is 100 milliseconds (ms) and Pstep is 100 ms, the partial sensing method will not miss undetected resources , based on the results of these partial sensing detections, reliable transmission resources can be selected.
  • ms milliseconds
  • ms milliseconds
  • the partial sensing method will not miss undetected resources , based on the results of these partial sensing detections, reliable transmission resources can be selected.
  • NR-V there are a large number of small-period periodic services and a large number of non-periodic services. For small-period and aperiodic services, it is
  • Embodiments of the present application provide a communication method and apparatus, so as to improve the performance and reliability of transmission.
  • a first aspect provides a communication method, comprising: a first device acquiring first resource reservation information in a first perception window and second resource reservation information in a second perception window, wherein the first perception window is located in a resource Before the time point where the selection trigger is located, the second perception window is located after the time point where the resource selection trigger is located, and the first perception window is composed of discontinuous time domain resources in the time domain; The first resource reservation information and the second resource reservation information are used to determine a first candidate resource; the first device sends a first message according to the first candidate resource.
  • the first candidate resource is related to the first resource reservation information and the second resource reservation information.
  • the first device can exclude resources in the resource selection window based on the resources monitored by the two-part sensing window, so as to determine more reliable resources and improve the performance and reliability of transmission.
  • the first device determines the first candidate resource according to the first resource reservation information and the second resource reservation information, including:
  • the first device determines a candidate resource set
  • the first device determines a first candidate resource according to the candidate resource set, the first resource reservation information and the second resource reservation information, where the candidate resource is a subset of the candidate resource set .
  • the first device determines a first candidate resource according to the candidate resource set, the first resource reservation information, and the second resource reservation information, wherein the first candidate resource Resources are a subset of the candidate resource set, including:
  • the first device determines, according to the first resource reservation information, a first reserved resource set, where the first reserved resource set is a subset of the candidate resource set;
  • the first device determines a second reserved resource set according to the second resource reservation information, where the second reserved resource set is a subset of the candidate resource set;
  • the first device determines a first candidate resource among resources in the candidate resource set excluding the first reserved resource set and the second reserved resource set.
  • the candidate resource set is the candidate resource corresponding to the first perception window
  • the first device determines the first candidate resource according to the candidate resource set, the first reserved resource set and the second reserved resource set, including:
  • the first device determines a first excluded resource set from the candidate resource set according to the candidate resource set and the first reserved resource set;
  • the first device determines a second excluded resource set from the candidate resource set according to the candidate resource set and the second reserved resource set;
  • the first device determines the first candidate resource by excluding resources other than the first excluded resource set and the second excluded resource set from the candidate resource set.
  • the first excluded resource set and the second excluded resource set are resource sets to be excluded in the candidate resource set, for example, the first excluded resource set and the second excluded resource set may be preset for other terminal devices. resources reserved or occupied.
  • the candidate resource set includes candidate resources corresponding to the first perception window and candidate resources after the second perception window;
  • the first device determines the first candidate resource according to the candidate resource set, the first reserved resource set and the second reserved resource set, including:
  • the first device determines, according to the candidate resources corresponding to the first perception window and the first reserved resource set, a first available resource set from the candidate resources corresponding to the first perception window;
  • the first device determines a second available resource set according to the candidate resources after the second perception window and the second reserved resource set, and the candidate resources after the second perception window;
  • the first device determines the first candidate resource according to the first available resource set and the second available resource set.
  • the first reserved resource set is a subset of candidate resources corresponding to the first perception window, and the first device excludes the first reserved resources from the candidate resource set corresponding to the first perception window set to obtain the first available resource set.
  • the first device may exclude the first resource from the candidate resource set corresponding to the first perception window. A resource corresponding to an intersection of a reserved resource set and candidate resources corresponding to the first perception window is obtained to obtain the first available resource set.
  • the second reserved resource set is a subset of the candidate resources after the second perception window
  • the first device excludes the second reserved resources from the candidate resources after the second perception window set to obtain the second available resource set.
  • the first device may exclude the first device from the candidate resources after the second perception window. The resources corresponding to the intersection of the two reserved resource sets and the candidate resources after the second perception window are obtained to obtain the second available resource set.
  • the first device determines a first reserved resource set according to the first resource reservation information, and determines a second reserved resource set according to the second resource reservation information, including :
  • the first device determines the first reserved resource set according to the first resource reservation information and the first threshold
  • the first device determines the second reserved resource set according to the second resource reservation information and the second threshold
  • the first threshold and the second threshold are respectively configured through signaling.
  • the first threshold and the second threshold may be preset thresholds, for example, the first threshold indicates that the first device selects the threshold of the first threshold in the candidate resource set The corresponding resource is used as the first reserved resource set, and the second threshold indicates that the first device selects the resource corresponding to the threshold value of the second threshold in the candidate resource set as the resource. the second reserved resource set.
  • the first device sends the first message according to the candidate resource, including:
  • the first device determines a target candidate resource in the first available resource set, and sends the first message according to the target candidate resource;
  • the first device determines target candidate resources in the first available resource set and the second available resource set, according to the target candidate resources The first message is sent.
  • the method before the first device determines the first candidate resource according to the first resource reservation information and the second resource reservation information, the method further includes:
  • the resource monitoring function based on the first perception window is configured or activated, that is, the first device determines that the resource monitoring function of the first perception window is configured or activated; or
  • the interval between candidate monitoring sub-windows in the first perception window is a positive integer, that is, in the configuration information based on the first perception window, the first device, It is determined that the interval between the candidate monitoring sub-windows in the first sensing window is a positive integer.
  • the length of the second sensing window is N-Tp, where the N is a positive integer, and the Tp is a parameter determined by the processing time of the first device, which is within 0 to 30 an integer; or,
  • the length of the second sensing window is a value determined in the configured service period that is less than or equal to the first period.
  • the processing time of the first device may be the processing time required by the first device to determine the first candidate resource according to the monitoring result of the sensing window.
  • the value of the first period is equal to the interval between candidate listening sub-windows in the first sensing window.
  • the second sensing window is composed of a plurality of discontinuous monitoring sub-windows in the time domain.
  • the second perception window is composed of multiple discontinuous time domain resources in the time domain.
  • the method further includes:
  • the first device determines a second candidate resource, the second candidate resource is located after a fourth perception window, and the fourth perception window is located after the first candidate resource and before the second candidate resource;
  • the first device sends the first message according to the second candidate resource.
  • a communication method including: a first device determines a first candidate resource according to a monitoring result in a third perception window, the first candidate resource is located after the third perception window, and the third The perception window is located after the time point when the resource selection is triggered; the first device determines a second candidate resource, the second candidate resource is located after the fourth perception window, and the fourth perception window is located after the first candidate resource and located before the second candidate resource; the first device sends a first message according to the first candidate resource and the second candidate resource.
  • sending the first message by the first device includes: sending, by the first device, an initial transmission of the first message, and sending a retransmission of the first message.
  • the first device determines the second candidate resource, including:
  • the first device determines the second candidate resource according to the third sensing window and/or the monitoring result in the third sensing window.
  • the interval between the last monitoring resource of the third sensing window and the first transmission resource of the first message in the first candidate resource is not less than T3; and/or ,
  • the interval between the last monitoring resource of the fourth perception window and the first transmission resource of the first message in the second candidate resource is not less than T3; and/or,
  • the interval between the last transmission resource of the first message in the first candidate resource and the first monitoring resource in the fourth perception window is T4;
  • T3 and T4 are non-negative constants.
  • the first transmission resource of the first message in the first candidate resources may also be the first transmission resource in the first candidate resources.
  • the T3 is 3 time slots; or,
  • the T3 is 5 time slots; or,
  • the T3 is 9 time slots; or,
  • the T3 is 17 time slots.
  • the subcarrier interval used by the first device for communication is 15 kHz, and the T3 is 3 time slots; the subcarrier interval used by the first device for communication is 30 kHz, and the T3 is 5 time slots slot; the subcarrier interval used by the first device for communication is 60kHz, and the T3 is 9 time slots; the subcarrier interval used by the first device for communication is 120kHz, and the T3 is 17 time slots gap.
  • the T4 is a non-negative constant
  • the T4 a+c, where a is the interval between the last transmission of the first message in the first candidate resource and the arrival time of the corresponding feedback message, and c is the processing time for the first device to detect the feedback message.
  • the feedback message is a feedback message of the last transmission of the first message in the first candidate resource.
  • the length of time for the first device to detect the feedback message may be the length of time from when the first device detects the opening of the receiving channel until the time when the feedback message is detected.
  • the last transmission of the first message to the corresponding feedback message is a NACK response message.
  • the first device performs detection on the fifth sensing window, so as to obtain the repetition of the first message
  • the number of times of transmission of the first message in the first candidate resource is less than the maximum number of retransmissions of the first message
  • the distance between the first device and the target device of the first message is less than the communication distance required by the first message.
  • the method further includes:
  • the number of times of transmission of the first message in the first candidate resource is less than the maximum number of retransmissions of the first message
  • the distance between the first device and the target device of the first message is less than the communication distance required by the first message.
  • the target device of the first message may be understood as a second device that receives the first message.
  • a communication device including a processing unit and a transceiver unit;
  • the transceiver unit is configured to acquire first resource reservation information in a first perception window and second resource reservation information in a second perception window, where the first perception window is located before the time point at which the resource selection is triggered, The second perception window is located after the time point at which the resource selection is triggered, and the first perception window is composed of discontinuous time domain resources in the time domain;
  • the processing unit configured to determine a first candidate resource according to the first resource reservation information and the second resource reservation information
  • the transceiver unit is further configured to send a first message according to the first candidate resource.
  • the processing unit is specifically configured to determine a candidate resource set; according to the candidate resource set, the first resource reservation information and the second resource reservation information, determine the first candidate resource resources, wherein the first candidate resource is a subset of the candidate resource set.
  • the processing unit is specifically configured to determine a first reserved resource set according to the first resource reservation information, where the first reserved resource set is a sub-set of the candidate resource set according to the second resource reservation information, determine a second reserved resource set, and the second reserved resource set is a subset of the candidate resource set; exclude the first reserved resource set from the candidate resource set The reserved resource set and the second reserved resource set are used to determine the first candidate resource.
  • the candidate resource set is the candidate resource corresponding to the first perception window
  • the processing unit is specifically configured to determine a first excluded resource set from the candidate resource set according to the candidate resource set and the first reserved resource set; according to the candidate resource set and the second reserved resource set, determine a second excluded resource set from the candidate resource set; in the candidate resource set, exclude the resources other than the first excluded resource set and the second excluded resource set to determine the first candidate resource .
  • the candidate resource set includes candidate resources corresponding to the first perception window and candidate resources after the second perception window;
  • the processing unit is specifically configured to determine a first available resource set from the candidate resources corresponding to the first perception window according to the candidate resources corresponding to the first perception window and the first reserved resource set; Two candidate resources after the perception window and the second reserved resource set, determine a second available resource set from the candidate resources after the second perception window; according to the first available resource set and the second available resource set , and determine the first candidate resource.
  • the processing unit is specifically configured to determine the first reserved resource set according to the first resource reservation information and the first threshold; according to the second resource reservation The information and the second threshold are used to determine the second reserved resource set; wherein the first threshold and the second threshold are respectively configured through signaling.
  • the processing unit is specifically configured to determine target candidate resources in the first available resource set; or if the resources in the first available resource set are less than the required number of candidate resources, the The first device determines target candidate resources in the first available resource set and the second available resource set;
  • the transceiver unit is specifically configured to send the first message according to the target candidate resource.
  • the processing unit is further configured to, before determining the candidate resource according to the first resource reservation information and the second resource reservation information, determine the resource based on the first perception window.
  • the resource monitoring function is configured or activated; or it is determined based on the configuration information of the first perception window that the interval between candidate monitoring sub-windows in the first perception window is a positive integer.
  • the length of the second perception window is N-Tp, where the N is a positive integer, and the Tp is a parameter determined by the processing time of the communication device, which is a range from 0 to 30 integer; or,
  • the length of the second sensing window is a value determined in the configured service period that is less than or equal to the first period.
  • the value of the first period is equal to the interval between candidate listening sub-windows in the first sensing window.
  • the second sensing window is composed of a plurality of discontinuous monitoring sub-windows in the time domain.
  • the processing unit is further configured to determine a second candidate resource, where the second candidate resource is located after a fourth perception window, and the fourth perception window is located after the first candidate resource and before the second candidate resource;
  • the transceiver unit is further configured to send the first message according to the second candidate resource.
  • a communication device including a processing unit and a transceiver unit;
  • the processing unit is configured to determine a first candidate resource according to the monitoring result in the third perception window, the first candidate resource is located after the third perception window, and the third perception window is located where the resource selection trigger is located. After the time point; determine a second candidate resource, the second candidate resource is located after the fourth perception window, and the fourth perception window is located after the first candidate resource and before the second candidate resource;
  • the transceiver unit is configured to send a first message according to the first candidate resource and the second candidate resource.
  • the processing unit is specifically configured to determine the second candidate resource according to the third sensing window and/or the monitoring result in the third sensing window.
  • the interval between the last monitoring resource of the third sensing window and the first transmission resource of the first message in the first candidate resource is not less than T3; and/or ,
  • the interval between the last monitoring resource of the fourth perception window and the first transmission resource of the first message in the second candidate resource is not less than T3; and/or,
  • the interval between the last transmission resource of the first message in the first candidate resource and the first monitoring resource in the fourth perception window is T4;
  • T3 and T4 are non-negative constants.
  • the T3 is 3 time slots; or,
  • the T3 is 5 time slots; or,
  • the T3 is 9 time slots; or,
  • the T3 is 17 time slots.
  • the T4 is a non-negative constant
  • the T4 a+c, where a is the interval between the last transmission of the first message in the first candidate resource and the arrival time of the corresponding feedback message, and c is the time when the communication device detects the feedback message.
  • the last transmission of the first message to the corresponding feedback message is a NACK response message.
  • the transceiver unit is further configured to perform detection on a fifth perception window for feedback-based transmission when one or more of the following conditions are established, so as to obtain the first The second candidate resource for the retransmission of the message:
  • the number of times of transmission of the first message in the first candidate resource is less than the maximum number of retransmissions of the first message
  • the distance from the communication device to the target device of the first message is less than the communication distance required by the first message.
  • a communication device in a fifth aspect, has the function of implementing the terminal device in the above method aspect, and includes components (means) corresponding to the steps or functions described in the above method aspect.
  • the steps or functions can be implemented by software, or by hardware (such as a circuit), or by a combination of hardware and software.
  • the apparatus described above includes one or more processors and communication units.
  • the one or more processors are configured to support the apparatus to perform the corresponding functions of the apparatus in the above method.
  • the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data of the apparatus.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.
  • the above device includes a transceiver, a processor and a memory.
  • the processor is used to control the transceiver or the input/output circuit to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to run the computer program in the memory, so that the apparatus performs the first aspect, the second aspect, or the first aspect
  • the terminal device completes the method.
  • the apparatus described above includes one or more processors and communication units.
  • the one or more processors are configured to support the apparatus to perform the corresponding functions of the terminal device in the above method.
  • the apparatus may further include one or more memories, which are used for coupling with the processor, and which store necessary program instructions and/or data of the terminal device.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.
  • the apparatus may be located in a terminal device or be a terminal device.
  • the above device includes a transceiver, a processor and a memory.
  • the processor is used to control the transceiver or the input/output circuit to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to run the computer program in the memory, so that the apparatus performs the first aspect, the second aspect, or the first aspect .
  • a computer-readable storage medium for storing a computer program, the computer program including a method for executing the first aspect, the second aspect, or any of the possible implementations of the first aspect and the second aspect. method instruction.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to execute the first aspect, the second aspect, or the first aspect .
  • the method in any possible implementation manner of the second aspect.
  • a chip system in an eighth aspect, includes a transceiver for implementing the functions of the device in the methods of the above aspects, for example, for example, receiving or transmitting data and/or information involved in the above methods.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • a communication system in a ninth aspect, includes a first device and a second device, and the first device can execute the first aspect, the second aspect, or any one of the first and second aspects
  • the second device is configured to receive the first message sent by the first device.
  • FIG. 1 is a schematic diagram of the architecture of a communication system
  • Fig. 2, Fig. 4, Fig. 5 are schematic diagrams of a partially sensed monitoring resource and candidate resource
  • FIG. 3 and FIG. 7 are schematic diagrams of a communication flow according to an embodiment of the present application.
  • FIG. 6 , FIG. 8 , and FIG. 9 provide schematic diagrams of candidate resources according to an embodiment of the present application.
  • FIG. 10 and FIG. 11 are structural diagrams of a communication device according to an embodiment of the application.
  • the word "exemplary” is used to mean serving as an example, illustration or illustration. Any embodiment or design described in this application as "exemplary” should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word example is intended to present a concept in a concrete way.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.
  • UE User equipment
  • terminal equipment is a device with wireless transceiver functions that access device) communicates with one or more core network (core network, CN) devices (or may also be referred to as core devices).
  • core network CN
  • core devices or may also be referred to as core devices.
  • User equipment may also be referred to as an access terminal, terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent, user device, or the like.
  • User equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the user equipment may be a cellular phone (cellular phone), a cordless phone, a session initiation protocol (SIP) phone, a smart phone (smart phone), a mobile phone (mobile phone), a wireless local loop (WLL) station, personal digital assistant (PDA), etc.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • the user equipment may also be a handheld device with a wireless communication function, a computing device or other device connected to a wireless modem, an in-vehicle device, a wearable device, a drone device, or a terminal in the Internet of Things, the Internet of Vehicles, the fifth generation Mobile communication (5th-generation, 5G) network and any form of terminal in future network, relay user equipment or terminal in future evolved PLMN, etc.
  • the relay user equipment may be, for example, a 5G home gateway (residential gateway, RG).
  • the user equipment may be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self driving, telemedicine Wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home wireless terminals, etc.
  • VR virtual reality
  • AR augmented reality
  • This embodiment of the present application does not limit the type or type of the terminal device.
  • the network device may support at least one wireless communication technology, such as long term evolution (LTE), new radio (NR), wideband code division multiple access (WCDMA), and the like.
  • LTE long term evolution
  • NR new radio
  • WCDMA wideband code division multiple access
  • network equipment may include access network equipment.
  • the network equipment includes, but is not limited to: a next-generation base station or a next-generation node B (generation nodeB, gNB), an evolved node B (evolved node B, eNB), a radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved node B, or home node B, HNB ), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, small station, micro station, etc.
  • generation nodeB, gNB next-generation node B
  • eNB evolved node B
  • RNC radio network controller
  • node B node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station for example, home evolved node B, or home node B, HNB
  • the network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device may It is a relay station, an access point, a vehicle-mounted device, a terminal, a wearable device, and a network device in future mobile communications or a network device in a future evolved public land mobile network (PLMN).
  • CU centralized unit
  • DU distributed unit
  • CRAN cloud radio access network
  • PLMN public land mobile network
  • the network device may include a core network (CN) device, and the core network device includes, for example, an AMF and the like.
  • CN core network
  • the concepts of perception, monitoring, and detection may be used instead.
  • the concepts of resources, resource collections/resource sets can be used interchangeably.
  • the first device may be a sending device.
  • the second device may be a receiving device.
  • the first device may be a terminal device or a network device, and the second device may be a terminal device or a network device.
  • the first device is mainly described as a terminal device UE.
  • the resource selection trigger time that is, the time point when the resource selection is triggered.
  • the higher layer requests the first device to determine the moment of a set of resource sets, and the set of resource sets is used for resource selection during data transmission.
  • the upper layer here may be the protocol or signaling of the base station, or may be the upper layer protocol stack (eg, upper layer software, MAC layer, etc.) of the first device.
  • This trigger moment can be a certain symbol n, a certain time slot n, or a certain mini-slot (the number of occupied symbols is any number of symbols from 1 to 12 or 1 to 14 symbols) n, subframe n or position of radio frame n etc.
  • the upper layer will provide the first device with parameters for resource selection.
  • the above parameters include one or more of the following: the resource pool used, the priority of the physical layer, the remaining packet delay budget (PDB), the number of sub-channels required in a time slot, Resource reservation interval, etc.
  • the resource trigger time is usually the time when the application layer data has been assembled in the protocol stack and the packet is about to be delivered through the physical layer. For example, it can be the time when the MAC TB (transport block of the MAC layer) arrives (or is about to be sent, or is about to arrive) at the physical layer.
  • the present invention takes time slot n as an example to describe the time reference point of the first device in the resource selection process. However, it does not rule out that the time slot n can be replaced by the symbol n, the time n of the transmission time of other duration units such as the mini-slot n.
  • Monitoring window (sensing window). It can also be called a resource monitoring window.
  • the monitoring window may also be referred to as a listening window, a detection window, or a sensing window.
  • the resource selection window is part or all of the time domain resources within the PDB remaining after slot n. For simplicity, it can be described as: [n+T 1 , n+T 2 ] time period. T 1 is a non-negative constant, and T 2 is a constant that does not exceed the remaining PDB.
  • the first device needs to determine the transmission resource for the TB to be transmitted within the selection window.
  • the first device also needs to send the TB to be transmitted according to the determined transmission resource within the selection window.
  • the first device will determine candidate or available resource sets in the selection window, and then report these resource sets to the higher layer, and then the higher layer determines the transmission resource from the resource set.
  • the physical layer of the first device may directly determine the transmission resource according to the determined candidate or available resource set, and send the TB to be transmitted.
  • Partial sensing which is another resource selection method under Mode 2 defined by the 3GPP protocol for NR-V2X.
  • the terminal device selects resources in this way, it only monitors the occupancy of a part of the resources in the resource pool, and does not monitor other parts of the resources, and then selects transmission from the monitored unoccupied resources and/or the unmonitored resources. resource.
  • the terminal device that selects the resource in this way is a partial sensing device, for example, a partial sensing device defined in R17.
  • multiple equally spaced candidate monitoring resource subsets may be configured before time slot n.
  • the positions where 10 candidate monitoring resource subsets are arranged at equal intervals at intervals of Pstep are: ty -10P step , ty -9P step , ... and ty -P step .
  • the size of each monitoring subset is Y time slots (or subframes).
  • ty is a candidate slot in a candidate resource of size Y determined from the selection window.
  • the first device detects sidelink control information (SCI) sent by other devices, and these SCIs will indicate the following information:
  • SCI sidelink control information
  • the time-frequency resources occupied by the corresponding data in the current time slot are reserved resources corresponding to the subsequent 1 or 2 retransmissions, and the transmission cycle is performed.
  • the first device may determine resources occupied or reserved for transmission of the current data packet and subsequent retransmissions according to the occupied resources and reserved resources. Further, in combination with the period indicated in the SCI, the resources occupied on the corresponding time-frequency resources in the next subsequent period can also be determined. When the cycle continues to expand forward, the resources occupied in the resource selection window in the future can be determined.
  • the detected resource occupied or reserved by the second device is R(x, y), where x represents the frequency domain location, and y represents the time domain location where the SCI is detected or the reserved location indicated by the current SCI. Then it can be determined that all resources R(x, y+j*P) are also reserved resources, where j is a non-negative integer, and P is the period value indicated on the detected SCI.
  • the first device may determine resources occupied or reserved by other UEs on the perception window and the resource selection window by combining the information.
  • the priority may be the priority of the service, or may refer to the priority information indicated in the SCI.
  • the higher the service priority means that the data in the data packet corresponding to the service to be transmitted is more important.
  • the higher the service priority indicates that the service has higher requirements on at least one of the following QoS parameters: service reliability requirement, service transmission delay requirement, service transmission rate or transmission throughput requirement.
  • the priority of the service may be negatively correlated with the priority value indicated in the SCI, or may be positively correlated. Taking negative correlation as an example, the smaller the priority value indicated in the SCI, the more important the business is, and vice versa, the lower the importance of the business is.
  • the priority in the SCI may be indicated by 3 bits, and its value may correspond to an integer from 1 to 8. When the SCI indicator is 1, it indicates that the business priority is higher; when the SCI indicator is 8, it indicates that the business priority is lower.
  • a TB of a service to be transmitted may include: at least one MAC control element and/or at least one logical channel.
  • each MAC control element corresponds to a priority
  • each logical channel corresponds to a priority.
  • the highest priority in at least one MAC control element and/or at least one logical channel included in the service to be transmitted may be determined as the priority of the entire TB of the service to be transmitted.
  • the signaling configuration includes the signaling sent by the base station for configuration, and the signaling may be an RRC message, a DCI message or a SIB message.
  • the signaling configuration may also be configured to the first device by preconfigured signaling.
  • the pre-configuration here is to define or configure the values of the corresponding parameters in advance by means of a protocol, and store them in the first device when communicating with the first device.
  • the preconfigured message can be modified or updated under the condition that the first device is connected to the Internet.
  • the signaling configuration may limit the value of the relevant parameter or the configuration information to the resource pool sent or received by the first device.
  • the resource pool is a collection of resources used for transmission on a particular carrier or portion of bandwidth.
  • the resource pool may be continuous or discontinuous in the time domain, and may also be continuous or discontinuous in the frequency domain. This application does not limit this.
  • Communication systems generally include, but are not limited to, 4th-generation (4th-generation, 4G) networks, LTE systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD), Universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, 5G communication system or NR, and other communication systems in the future such as 6G, etc.
  • 4th-generation (4th-generation, 4G) networks LTE systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD), Universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, 5G communication system or NR, and other communication systems in the future such as 6G, etc.
  • the communication system includes a sending device 1 and a receiving device 2, and data can be sent and received between the sending device 1 and the receiving device 2, for example, the sending device 1 can send data to the receiving device 2 , and the sending device 1 can receive data from the receiving device 2.
  • the communication system includes a network device, and the sending device 1 and/or the receiving device 2 can receive configuration information of transmission parameters from the network device.
  • the transmitting device may be a base station, and the receiving device may be a terminal; or, the transmitting device may be a terminal, and the receiving device may be a base station.
  • the sending device and the receiving device can be the same type of user equipment or network equipment, or can be a roadside station and a user terminal, that is, the sending device is a user terminal, and the receiving device is also a user terminal; or , the transmitting device is a roadside station, and the receiving device is also a user terminal; or, the transmitting device is a user terminal, and the receiving device is also a roadside station; or, the transmitting device is a base station, and the receiving device is also a base station.
  • the sidelink may also be the same type or different types of base station equipment, and the function of the sidelink at this time is similar to that of the relay link, but the air interface technology used may be the same or different.
  • the roadside unit (roadside unit, RSU) can be regarded as a roadside station/roadside unit from the physical entity.
  • the RSU may be a terminal device or a network device such as a base station, which is not limited in this embodiment of the present application.
  • the terminal device may also be an on-board unit (on board unit, OBU).
  • the first device and the second device may be user equipment or network devices, which are not limited to the present invention.
  • the sending device is a base station and the receiving device is also a base station; or, the sending device is a user equipment and the receiving device is also a user equipment.
  • V2V vehicle-to-vehicle
  • V2I vehicle-to-infrastructure
  • V2P vehicle-to-pedestrian
  • V2P vehicle-to-network
  • the research on sidelink enhancement of R17 has been entered.
  • the research of NR-V2X in R16 the first basic version of sidelink has been completed.
  • R14-like partial sense is considered as a baseline to reduce the power consumption of R16-based full sense.
  • the transmitting terminal device detects possible sidelinks in the sensing window. such as Pstep) to detect possible sidelinks.
  • the terminal device can then select time-frequency resources for transmission within a selection window based on the detection results of these partial perceptions.
  • the above perception-based purpose is to facilitate the selection of resources that are not selected or occupied by other UEs as much as possible in future data transmission, so as to reduce potential collisions during transmission, thereby improving reliability during transmission.
  • the selected step size Pstep is not less than the period of the actually transmitted periodic service, for example, the period of the LTE-V periodic service is 100 milliseconds (ms) or an integer multiple of 100ms, and when Pstep is 100ms, the partial sensing method is adopted to not Undetected resources will be missed. Based on the results of these partial sensing detections, reliable transmission resources can be selected.
  • the periodic services with small cycles such as 3ms, 5ms, 10ms, 20ms, 50ms, etc.
  • a large number of aperiodic services it can be understood that the cycle of this type of service is 0, the Class traffic arrives in random bursts).
  • the power consumption of the LTE-V partial perception is 10% of the full perception.
  • Pstep cannot be greater than 5ms.
  • the resources are different, and the resources selected by a certain terminal device do not belong to the resources of the terminal device with higher priority.
  • the terminal device In the NR-V resource selection process based on complete perception in the current standard, after the terminal device selects resources, it needs to re-evaluate these resources before determining to reserve these resources. After the terminal device selects the resource to send the message, the terminal device can decide whether to continue to use the current resource. When deciding whether to continue to use the current resource, the terminal device needs to confirm whether these resources are preempted by other terminal devices. If it is preempted by other terminal equipment, the terminal equipment needs to select other resources to send subsequent messages. However, when determining the evaluation of reserved resources and determining the evaluation of transmission resources of subsequent messages, the terminal equipment can partially select clean resources, but when the candidate resources are insufficient, it cannot be guaranteed that the terminal equipment can obtain a sufficient number of reliable candidate resources. , the complete transmission of the message cannot be guaranteed.
  • Nmax can be 2 or 3.
  • the following further analysis shows the total number of time slots spanned by a maximum of 32 transmissions of a TB (one initial transmission plus 31 retransmissions) for blind transmission (repeated transmission without physical layer feedback) and feedback-based transmission.
  • the present application provides a communication method and device.
  • the communication method improved in the present application is mainly used for sidelinks, and is not limited to the communication scenario of the Internet of Vehicles, but can also be extended to networks and systems based on autonomous resource selection, which is not limited in the embodiments of the present application.
  • the first device may acquire first resource reservation information in a first perception window and second resource reservation information in a second perception window, where the first perception window is located at a time point where resource selection is triggered Before, the second perception window is located after the time point when the resource selection is triggered, and the first perception window is composed of discontinuous time domain resources in the time domain; the first device reserves the first resource according to the information and second resource reservation information, determine a first candidate resource, and the first device sends the first message according to the first candidate resource. It can be seen that in the embodiment of the present application, when the first device determines the candidate resources, it simultaneously excludes the resources in the resource selection window based on the resources monitored by the two parts of the perception window, so that more reliable resources can be determined and the transmission performance can be improved. and reliability.
  • An embodiment of the present application provides a communication method, and the method can be applied to the communication system shown in FIG. 1 . 3, the specific process of the communication method will be described in detail, and the process includes:
  • the first device acquires first resource reservation information in a first perception window, where the first perception window is located before the time point at which the resource selection is triggered, and the first perception window in the time domain consists of discontinuous time Domain resource composition.
  • the first device may be a sending device, and the sending device is a terminal device.
  • the first perception window consists of a plurality of discontinuous time domain resources, each time domain resource can be set at intervals with a step size, and the value of the set step size is not limited here, and each time domain resource can be viewed As each monitoring sub-window in the first sensing window (may be referred to as the first monitoring sub-window for short).
  • the set step size may be Pstep
  • the first perception window includes ty -10P step , ty -9P step , ... and ty -P step .
  • the first sensing window may be all or a subset of all sensing positions in ty - 10Pstep , ty - 9Pstep , ... and ty - Pstep . where ty is the position of the candidate resource in the selection window.
  • the resource monitoring function based on the first sensing window may be configured or activated or enabled (enabled) or disabled (disabled) through signaling.
  • the interval between the candidate monitoring sub-windows in the first perception window is a positive integer, or the candidate monitoring sub-windows in the first perception window are positive integers.
  • the interval between is 0.
  • the interval between the candidate monitoring sub-windows in the first perception window is not 0, it may be considered that the resource monitoring function based on the first perception window is enabled.
  • the interval between the candidate monitoring sub-windows in the first perception window is 0, it may be considered that the resource monitoring function based on the first perception window is disabled.
  • the interval between the candidate monitoring sub-windows in the first perception window is a positive integer, or the candidate monitoring sub-windows in the first perception window are positive integers.
  • the interval between is a negative number, or the interval between candidate monitoring sub-windows in the first sensing window is 0.
  • the interval between the candidate monitoring sub-windows in the first perception window is not 0, it may be considered that the resource monitoring function based on the first perception window is enabled.
  • the interval between the candidate monitoring sub-windows in the first sensing window is a negative number, it can be considered that the resource monitoring function based on the first sensing window is turned off.
  • the interval between the candidate monitoring sub-windows in the first perception window it can be considered that the resource monitoring based on the first perception window performs the function of full perception.
  • the upper-layer protocol stack of the first device may request the physical layer of the first device to determine the resource set used for sideline data transmission. For example, in time slot n, the protocol stack will send trigger request information, and in time slot n At the same time, parameters for resource selection are provided, and the time slot n can be regarded as a time slot for resource selection trigger, that is, the time point at which the resource selection trigger is located, or the resource selection trigger time.
  • the first device determines first resource reservation information by monitoring in the first perception window, where the first resource reservation information can be used to indicate resources occupied by other devices except the first device , that is, used to determine the reserved resources of other devices, that is, the first resource reservation information is used to determine the resources that the first device needs to exclude. 4 is taken as an example for description, the first device determines in the perception window that other devices occupy resources when sending. On these occupied resources, the SCI of the occupied resources may further indicate: retransmission of data packets sent by other devices, or resources reserved for initial transmission in subsequent periods. These reserved resources can appear in (0-T 0 ) to (nT pro,0 ), and can also appear in the range of the resource selection window.
  • the first device acquires second resource reservation information in a second sensing window, where the second sensing window is located after the time point at which the resource selection is triggered.
  • the second perception window may be a continuous time domain resource in the time domain.
  • the second perception window may be composed of multiple discontinuous monitoring sub-windows in the time domain, that is, the second perception window includes multiple discontinuous time domain resources.
  • Each monitoring sub-window in the window may be simply referred to as a second monitoring sub-window.
  • the second sensing window may be a short sensing window (short sensing window, SSW).
  • the resource monitoring function based on the second sensing window may be configured by signaling or activated or enabled (enabled) or disabled (disabled).
  • the length of the second sensing window is a positive integer, or the length of the second sensing window is 0.
  • the length of the second sensing window is not 0, it may be considered that the resource monitoring function based on the second sensing window is enabled.
  • the length of the second sensing window is 0, it may be considered that the resource monitoring function based on the second sensing window is disabled.
  • the interval between the candidate monitoring sub-windows in the second perception window is a positive integer, or the candidate monitoring sub-windows in the second perception window are positive integers.
  • the interval between is a negative number, or the interval between candidate monitoring sub-windows in the second sensing window is 0.
  • the interval between the candidate monitoring sub-windows in the second perception window is not 0, it may be considered that the resource monitoring function based on the second perception window is enabled.
  • the interval between the candidate monitoring sub-windows in the second sensing window is a negative number, it may be considered that the resource monitoring function based on the second sensing window is disabled.
  • the interval between the candidate monitoring sub-windows in the second perception window is 0, it can be considered that the resource monitoring based on the second perception window performs the function of full perception.
  • the length of the second perception window may be the length determined by the start position and the end position, or may be the number or size of resources occupied by the second perception window; the length of the second perception window may also be configured by signaling.
  • Maximum length, the length of the second sensing window when the first device actually monitors is not greater than the maximum length, or the length of the second sensing window can also be the minimum length configured through signaling, the first device actually The length of the second sensing window during monitoring is not less than the minimum length.
  • the length of the second sensing window may also be a maximum length configured through signaling, and the length of the second sensing window when the first device actually monitors is not greater than the maximum length.
  • the length of the second sensing window may be related to the maximum number of retransmissions of the TB, or the length of the first step, or the service period.
  • the length of the second perception window is N-Tp, where the N is a positive integer, and the Tp is a parameter determined by the UE processing time, which is an integer from 0 to 30.
  • the retransmission packets of the TB are constrained within the effective range of the second sensing window.
  • the length of the second sensing window is (Tu-T3-T proce,0 )
  • Tu is the length of the second sensing window
  • the length of Tu is determined by the maximum number of retransmissions of the TB.
  • the maximum number of retransmissions for TB is 32, and Tu is 31.
  • T3 is the interval between the last sensing resource of the second sensing window and the first transmission resource of the first message.
  • the length of the second sensing window is a value determined in the configured service period that is less than or equal to the first period. The value of the first period is equal to the interval between candidate listening sub-windows in the first sensing window.
  • the length of the second sensing window may be the length actually used, or the minimum value of the length, or the maximum value of the length.
  • the first device determines second resource reservation information by monitoring in the second perception window, where the second resource reservation information can be used to determine resources occupied by other devices except the first device . That is, it is used to determine the reserved resources of other devices, that is, the first resource reservation information is used to determine the resources that the first device needs to exclude. 4 is taken as an example for description, the first device determines in the SSW that other devices occupy resources when sending. On these occupied resources, the SCI of the occupied resources may further indicate: retransmission of data packets sent by other devices, or resources reserved for initial transmission in subsequent periods. These reserved resources can appear within the scope of the resource selection window.
  • the first device determines a first candidate resource according to the first resource reservation information and the second resource reservation information.
  • the first device may determine the candidate resource set Sa.
  • the candidate resource set is a candidate resource set for selecting transmission resources.
  • the candidate resource set may be candidate resources corresponding to the first perception window.
  • the candidate resource set includes all resources in the resource selection window in FIG. 4 , or the candidate resource set may include candidate resources on Y time slots in the resource selection window in FIG. 4 (as shown in the black box in FIG. 4 ) shown).
  • the candidate resource set may include candidate resources corresponding to the first perception window and candidate resources after the second perception window.
  • the candidate resources after the second perception window do not include the candidate resources corresponding to the first perception window.
  • the candidate resource set includes all resources in the resource selection window in FIG. 5 excluding the second perception window, and the candidate resource set includes candidate resources on Y time slots in the resource selection window.
  • the first device determines a first candidate resource according to the candidate resource set, the first resource reservation information and the second resource reservation information.
  • the first candidate resource is a subset of the candidate resource set. It can be understood that the first candidate resource may be exactly the same as the candidate resource set, or the first candidate resource may include the candidate resource. Part of the resource in the resource collection.
  • the first device may determine the first reserved resource set R1 according to the first resource reservation information; the first device may determine the first reserved resource set R1 according to the second resource reservation information. Two reserved resource sets R2; the first device excludes the first reserved resource set R1 and the second reserved resource set R2 from the candidate resource set Sa, and determines the first candidate resource Sa'.
  • the first device can monitor the resource occupation that may occur in the selection window by other devices, and the monitoring result includes two parts: the first part is occupied by other devices. And the first reserved resource set R1 that needs to be excluded, and the second part is the second reserved resource set R2 that is occupied by other devices and needs to be excluded.
  • the first device takes into account the monitoring results of the first part and the monitoring results of the second part, and excludes the resources in the selection window based on the two partially monitored resources, so that the first device can determine More reliable transmission resources to improve transmission performance and reliability.
  • the first reserved resource set R1 is the service monitored by the first device on the first part of the monitoring resources that can be used for detection configured in the first perception window, and the service monitored by the first device corresponds to The transmission reservation resource is located in the selection window and satisfies the first condition.
  • the first condition may be configured through signaling.
  • the first condition may include: a value of a detected reference signal receiving power (reference signal receiving power, RSRP) is greater than a first threshold.
  • the first threshold may be configured through signaling, and optionally, the first threshold is determined by receiving priority.
  • the RSRP detected by the first device may be measured from the demodulation reference signal (demodulation reference signal, DMRS) of the received sidelink control information (SCI), or obtained from the received SCI. Measured on the DMRS of the indicated physical sidelink shared channel (PSSCH).
  • DMRS demodulation reference signal
  • PSSCH physical sidelink shared channel
  • the first condition may further include: in the first sensing window, the first device detects SCIs sent by other devices, and determines that the resources reserved by these SCIs on a periodic basis are located in the selection window; or the first In the first sensing window, the device detects SCIs sent by other devices, and determines that the periods of these SCIs are 0, but the reserved resources for retransmission of data packets corresponding to these SCIs are located within the selection window.
  • the second reserved resource set R2 is the service monitored by the first device on the second part of the monitoring resources in the second perception window, and the transmission resource corresponding to the service monitored by the first device is located in the selection. window, and satisfy the second condition.
  • the second condition may be configured through signaling.
  • the second condition includes: the detected RSRP value is greater than the second threshold.
  • the second threshold may be configured through signaling, and optionally, the second threshold is determined by receiving priority.
  • the first threshold may be configured through signaling, and optionally, the first threshold is determined by receiving priority.
  • the RSRP detected by the first device may be measured from the DMRS of the received SCI, or measured from the DMRS of the PSSCH indicated by the received SCI.
  • the second condition may further include: the first device detects SCIs sent by other devices in the second sensing window, and determines that the resources reserved by these SCIs on a periodic basis are located in the selection window; or the first device In the second sensing window, the device detects SCIs sent by other devices, and determines that the periods of these SCIs are 0, but the reserved resources for retransmission of data packets corresponding to these SCIs are located within the selection window.
  • the candidate resource set can be the candidate resource corresponding to the first perception window:
  • the subtraction "-" is used to indicate the exclusion operation.
  • the first reserved resource set R1 can be regarded as a first excluded resource set
  • the second reserved resource set R2 can be regarded as a second excluded resource set.
  • the first device may determine a first excluded resource set according to the candidate resource set Sa and the first reserved resource set R1, and according to the candidate resource set Sa and the second reserved resource set Resource set R2, determine a second excluded resource set; the first device excludes the first excluded resource set and the second excluded resource set in the candidate resource set Sa, and determines the first candidate resource Sa '.
  • the first device excludes only the resources located in Sa from R1 and/or R2. As shown in FIG.
  • the first reserved resource set R1 includes R1a, R1b, R1c, R1d and R1e
  • the second reserved resource set R2 includes R2a, R2b and R2c.
  • the first device may exclude only R1b, R1c and R1d in Sa in R1 and only R2b and R2c in Sa in R2.
  • the first device excludes the resources in the selection window based on the two kinds of partially monitored resources, it only considers the first reserved resource set R1 and the second reserved resource in the set of excluded and candidate resources.
  • the intersection part of the set R2 enables the first device to determine more reliable transmission resources, and further improves the performance and reliability of transmission.
  • candidate resource set includes candidate resources corresponding to the first perception window and candidate resources after the second perception window:
  • the first device may exclude the first reserved resource set R1 from the candidate resources corresponding to the first perception window, and exclude the second reserved resource set R1 from the candidate resources after the second perception window.
  • the resource set R2 is left, and the first candidate resource Sa' is obtained.
  • the first device may exclude the first reserved resource set R1 and the second reserved resource set R2 from the candidate resources corresponding to the first sensing window, and then exclude the second sensing window.
  • the first reserved resource set R1 and the second reserved resource set R2 are excluded from the subsequent candidate resources to obtain the first candidate resource Sa'.
  • the first device may determine the first available resource set Sa1 according to the candidate resource set Sa and the first resource reservation information; the first device may determine the first available resource set Sa1 according to the The candidate resource set Sa and the second resource reservation information determine the second available resource set Sa2; the first device determines the first available resource set Sa1 and the second available resource set Sa2 according to the first available resource set Sa1 and the second available resource set Sa2.
  • a candidate resource Sa' may be determined.
  • the first available resource set is a candidate resource set
  • the second available resource set is a candidate resource set
  • the first device can monitor the resource occupation that may occur in the selection window by other devices, and obtain two parts according to the monitoring result: the first part is the first available The resource set Sa1, the second part is the second available resource set Sa2.
  • the candidate resource set can be the candidate resource corresponding to the first perception window:
  • the first device may directly exclude the first reserved resource set from the candidate resource set Sa to obtain a first available resource set Sa1, and directly exclude the first reserved resource set from the candidate resource set Sa.
  • Two reserved resource sets are obtained to obtain a second available resource set Sa2; then the first device determines a first candidate resource Sa' according to the first available resource set Sa1 and the second available resource set Sa2.
  • candidate resource set includes candidate resources corresponding to the first perception window and candidate resources after the second perception window:
  • the first device may exclude the first reserved resource set from the candidate resources corresponding to the first sensing window to obtain a first available resource set Sa1, and the second sensing window after the second sensing window is excluded. Excluding the second reserved resource set from the candidate resources to obtain a second available resource set Sa2; the first device obtains a first candidate resource Sa' according to the first available resource set Sa1 and the second available resource set Sa2 .
  • the first device may exclude the first reserved resource set and the second reserved resource set from the candidate resources corresponding to the first perception window to obtain the first available resource set Sa1, and then remove the first available resource set Sa1. Excluding the first reserved resource set and the second reserved resource set from the candidate resources after the second perception window, to obtain a second available resource set Sa2; the first device obtains a second available resource set Sa1 according to the first available resource set Sa1 and the second available resource set Sa2 to obtain the first candidate resource Sa'. In addition to the Sa1 obtained after excluding the first reserved resource set and the second reserved resource set, the first device also excludes the first reserved resource set and the second reserved resource set to obtain Sa2, so that the The first device can determine a more reliable transmission resource to improve the performance and reliability of transmission.
  • Said Sa1 may be the above-mentioned Sa'.
  • the initial resource of the candidate resource Sa2 except the second perception window all resources in the selection window - candidate resources on Y time slots in the selection window - resources occupied by the second perception window (such as short perception window (short perception window). sensing window) resources occupied by SSW).
  • Sa2 Sa2 initial resource-the first reserved resource set-the second reserved resource set.
  • the first reserved resource set is the service monitored by the first device on the first part of the monitoring resources that can be used for detection configured in the first perception window, and the transmission corresponding to the service monitored by the first device
  • the reserved resources are located in the initial resources of Sa2 and satisfy the first condition.
  • the second reserved resource set is the service monitored by the first device on the second part of the monitoring resources in the second perception window, and the transmission resource corresponding to the service monitored by the first device is located at the initial Sa2. resource and satisfy the second condition.
  • S304 The first device sends a first message according to the first candidate resource.
  • the first message includes an initial transmission of the first message and a retransmission of the first message.
  • the physical layer of the first device may report the first candidate resource to the upper protocol layer of the first device, such as a medium access control (medium access control, MAC) layer.
  • the protocol layer selects a target candidate resource for transmission from the first candidate resources reported by the physical layer, for example, the protocol layer randomly selects a time-frequency resource from the first candidate resource as a target candidate resource for transmission target candidate resource.
  • the available resources cannot be less than X1% of the total resources (such as 20%, 35% or 50%), but the available resources determined by X% may be less than the required number of candidate resources, so it is necessary to provide enough available resources
  • X1 is a numerical value not greater than 100.
  • the first device When the first device excludes the first reserved resource set R1 and the second reserved resource set R2 from the candidate resource set Sa, and determines the first candidate resource Sa', the first device if It is determined that the first candidate resource is less than X2% of the total resource, or after the re-evaluation or preemption check is completed, it is determined that the candidate resource is less than the required number of candidate resources, the first device can increase the first threshold by ⁇ 1dB, The first threshold is raised by ⁇ 2dB to increase the candidate resources for transmission.
  • ⁇ 1 and ⁇ 2 can be independently configured.
  • the optional value of ⁇ 1 is less than or equal to the value of ⁇ 2.
  • the values of ⁇ 1 and ⁇ 2 may be integers such as 3, 6, and 9, which are not limited here.
  • X1 and X2 are numerical values not greater than 100, and X1 and X2 may be the same or different. The process of performing re-evaluation and preemption by the first device will be described in subsequent embodiments, and will
  • the first available resource set and/or the second available resource set may be reported to the upper-layer protocol stack by the physical layer of the first device, and the protocol stack selects the target candidate resource for transmission from it.
  • the first device may preferentially determine a target candidate resource in the first available resource set Sa1, and the first device sends the first message according to the target candidate resource.
  • the first device determines a target candidate resource in the first available resource set. If the resources in the first available resource set are less than the required number of candidate resources, the first device determines target candidate resources in the first available resource set and the second available resource set. When the resources in the first available resource set are insufficient, the first device can select available resources in the second resource set, and can select available resources for the maximum number of retransmissions of a data packet (eg, 32 times), so as to increase the availability of more resources. The number of resources can provide reliable transmission resources for multiple retransmissions of a data packet, and improve the performance and reliability of transmission.
  • the resources of the first available resource set are less than/not less than the required number of candidate resources, or the resources of the first available resource set may be less than/not less than the minimum number of resources required for sending the first message .
  • the resources of the first available resource set are less than the required number of candidate resources, which may be determined in one of the following ways: the resources of the first available resource set are less than X3% of the total resources, and the total resources may be For all the resources in the selection window, or the candidate resources on the Y time slots, or the resources obtained by excluding the candidate resources on the Y time slots and the resources occupied by the second perception window for all the resources in the selection window ( Such as Sa2 initial resources); or the resources in the first available resource set are less than a specific number of time slots and sub-channels; or the resources in the first available resource set can only transmit the initial transmission and partial retransmission of one TB, but The remaining retransmission packets cannot be transmitted.
  • X1, X2 and X3 may be determined at 20, 35 or 50, or may be other values not greater than 100, and X1, X2 and X3 may be the same or different.
  • the embodiment of the present application also provides the communication process shown in FIG. 7 , including the following processes:
  • the first device determines a first candidate resource according to the monitoring result in the third perception window, the first candidate resource is located after the third perception window, and the third perception window is located at the time point where the resource selection is triggered after.
  • the third sensing window may be the above-mentioned second sensing window.
  • the third sensing window may be a sensing window that works independently, that is, there is no necessary time domain correlation between the third sensing window, the first sensing window, and the second sensing window.
  • the first candidate resource is used for sending the initial transmission of the first message and optionally a partial retransmission of the first message (eg, the first retransmission of the first message). That is, the first candidate resource can send one initial transmission and at least one retransmission.
  • the first device determines a second candidate resource, the second candidate resource is located after a fourth perception window, and the fourth perception window is located after the first candidate resource and before the second candidate resource.
  • the second candidate resource is used for sending a retransmission of the first message (eg, sending a second retransmission of the first message).
  • the resources used for transmission on the first candidate resources cannot reserve/occupy the transmission resources on the second candidate resources.
  • the first device may determine a second candidate resource according to the third sensing window and/or the monitoring result in the third sensing window.
  • the first device may determine the second candidate resource according to the fourth sensing window and/or the monitoring result in the fourth sensing window.
  • the third perception window and the fourth perception window are composed of continuous or discontinuous time domain resources in the time domain.
  • the third perception window is composed of continuous time domain resources in the time domain
  • the fourth perception window is composed of continuous time domain resources in the time domain
  • the third perception window and the fourth Perceptual windows are not contiguous or contiguous in the time domain.
  • the interval between the last monitoring resource of the third sensing window and the first transmission resource of the first message in the first candidate resource is not less than T3; and/or, the first The interval between the last monitoring resource of the four perception windows and the first transmission resource of the first message in the second candidate resources is not less than T3; and/or, the The interval between the last transmission resource of the first message and the first monitoring resource in the fourth sensing window is T4.
  • the T3 and T4 are non-negative constants.
  • the interval between the last monitoring resource of the third sensing window and the first transmission resource of the first message in the first candidate resources is not less than T3.
  • T3 is the maximum or minimum time for completing the sensing and resource selection process.
  • the T3 is 3 time slots; or, for a 30kHz subcarrier spacing, the T3 is 5 time slots; or, for a 60kHz subcarrier spacing, the T3 is 9 timeslots timeslots; or, for 120 kHz subcarrier spacing, the T3 is 17 timeslots.
  • the T4 is a non-negative constant.
  • transmission without feedback such as transmission without feedback of hybrid automatic repeat request (HARQ)
  • HARQ hybrid automatic repeat request
  • the T4 a+c.
  • the last transmission of the first message in the first candidate resource to the corresponding feedback message is a non-acknowledgement or negative acknowledgement (NACK) response message, or any transmission of the first message in the first candidate resource
  • the corresponding feedback message is a non-acknowledgement or negative acknowledgement (NACK) response message.
  • the last transmission of the first message in the first candidate resource refers to the last retransmission of the first message in the first candidate resource.
  • the value of a is an integer between 1 and 10, such as 1, 2, 3, 4, etc.; the optional value of c is an integer between 1 and 4.
  • the units of a and c are slots, symbols or subframes.
  • S703 The first device sends a first message according to the first candidate resource and the second candidate resource.
  • the first device sends the initial transmission of the first message and the first retransmission of the first message on the first candidate resource, and the first device sends the second candidate resource A second retransmission of the first message is sent on.
  • the S701-S703 only show one transmission process of the first message.
  • the first device re-determines the third sensing window and re-determines the first candidate resource, and re-determines the second candidate resource, and every time After the first candidate resource and the second candidate resource are re-determined, the first message is sent by using the re-determined first candidate resource and the re-determined second candidate resource.
  • the first device For blind transmission, when one or more of the following re-evaluation conditions are established, the first device performs detection on the fifth perception window, so as to obtain the second candidate resource for retransmission of the first message :
  • the number of times of transmission of the first message in the first candidate resource is less than the maximum number of retransmissions of the first message
  • the distance between the first device and the target device of the first message is less than the communication distance required by the first message
  • the delay in sending the first message by the first device does not reach the remaining packet delay budget (packet delay budget, PDB).
  • Nmax 3 in FIG. 8 .
  • Step 11 The first device performs a re-evaluation to determine Nmax resources, where the Nmax resources include resources for an initial transmission and two retransmissions of the first message.
  • the Nmax resources are in 32 time slots (slots), as shown in the 3 shaded parts in FIG. 8 .
  • the re-evaluation process performed by the first device may also be regarded as a preemption check, or monitoring based on a short perception window.
  • Step 12 The first device sends an initial transmission and two retransmissions of the first message on Nmax resources.
  • Step 13 The first device determines that one or more of the blind transmission re-evaluation conditions are established, and the first device returns to step 11 .
  • the first device determines that the number of transmissions of the first message is less than the maximum number of retransmissions (for example, 10 times), and the distance between the first device and the target device that receives the first message is smaller than the first message
  • the first device returns to step 11 to re-evaluate again, and performs the reservation and transmission of the next group of Nmax resources, Until all blind transmissions are sent within the set delay of the PDB.
  • the first device performs reservation and transmission of the second group of Nmax resources. After the reserved transmission is completed, if the re-evaluation condition of the blind transmission is satisfied, the first device performs reservation transmission of the third group of Nmax resources. is established, the first device may still carry out the subsequent reservation and transmission of the fourth group, . information.
  • the starting position of the sensing window of the second group may start from the last time slot in the previous group of Nmax resources, or the starting position of the sensing window of the second group may be the same as that of the previous set of Nmax resources.
  • the interval between the last time slots of can be T3.
  • the first device does not receive messages at a time domain location where it does not monitor.
  • the pre-indication in a sending group does not exceed the resources of the sending group, that is, the first resource indicates the following two resources (that is, the initial transmission indicates the resources for the next two retransmissions), and the second resource indicates the following two resources.
  • the resource indicates the next resource (ie, the first retransmission indicates the second retransmission after the second), and the last resource (ie, the second retransmission) does not indicate the following reserved resources.
  • the first device may select Nmax resources to send the first message based on the partial sensing result. If there is no partial perception result, that is, there is no re-evaluation result, the first device may randomly select a resource to send the first message.
  • step 13 the first device determines that none of the re-evaluation conditions for blind transmission is satisfied, and the first device determines that the sending of the first message is completed, and can stop sending the first message.
  • the first device detects on a fourth perception window to obtain the second retransmission of the first message when one or more of the following re-evaluation conditions hold Candidate resources:
  • the first device detects that the feedback result of the last transmission of the first message in the first candidate resource is NACK, or the first device detects that the feedback result of each transmission of the first candidate resource is NACK, or the first A device detects each transmission of the first candidate resource and does not receive an ACK;
  • the number of times of transmission of the first message in the first candidate resource is less than the maximum number of retransmissions of the first message
  • the distance between the first device and the target device of the first message is less than the communication distance required by the first message
  • the delay for the first device to send the first message does not reach the remaining packet delay budget (PDB).
  • Nmax 3 in FIG. 9 . Similarities between Figures 9 and 8 will not be repeated.
  • Step 21 The first device performs a re-evaluation to determine Nmax resources, where the Nmax resources include resources for an initial transmission and two retransmissions of the first message.
  • Step 22 The first device sends an initial transmission and two retransmissions of the first message on Nmax resources.
  • Step 23 The first device determines that one or more of the re-evaluation conditions of the feedback-based transmission are satisfied, and the first device determines that one or more of the re-evaluation conditions of the feedback-based transmission are satisfied T4 time, return to step 21.
  • the first device detects NACK or no ACK response is received for all transmissions, and the first device determines that the number of transmissions of the first message is less than the maximum number of retransmissions, and the first device is far from receiving the The distance between the target devices of the first message is less than the communication distance required by the first message, the first device returns to step 21 to re-evaluate again, and performs the reservation and transmission of the next group of Nmax resources until the feedback-based None of the transfer's re-evaluation conditions are true.
  • the first device confirms whether the previous Nmax resource reservation has received an ACK, for example, each transmission receives a NACK (or does not receive an ACK), Alternatively, the feedback result of the last transmission is NACK, and the first device starts re-evaluation at time T4 after receiving the NACK.
  • the optional T4 may be the time from when the first device receives the NACK, plus the detection time of the NACK and the time of opening the receiving channel.
  • the T4 may be 1 to 2 slots.
  • the number of transmissions performed during actual transmission (such as initial transmission and retransmission, or the first transmission in a candidate resource).
  • Secondary retransmission and subsequent retransmission may be equal to Nmax or less than Nmax.
  • the first device when it performs re-evaluation in the selection window, it does not perform detection when transmitting messages, and divides the retransmission of a data packet to be transmitted into multiple groups, thereby reducing the power message brought by monitoring and improving the reliability of transmission. sex.
  • the communication method is described in detail above with reference to FIGS. 3 to 9 .
  • an embodiment of the present application further provides a communication device.
  • the communication device 1000 includes a processing unit 1001 and a
  • the transceiver unit 1002 and the apparatus 1000 may be configured to implement the methods described in the foregoing method embodiments applied to terminal equipment.
  • the apparatus 1000 is applied to a first device.
  • the first device may be a terminal device, and the terminal device is a sending device.
  • the transceiver unit 1002 is configured to acquire first resource reservation information in a first perception window and second resource reservation information in a second perception window, where the first perception window is located where the resource selection trigger is located Before the time point, the second perception window is located after the time point where the resource selection trigger is located, and the first perception window is composed of discontinuous time domain resources in the time domain;
  • the processing unit 1001 configured to determine a first candidate resource according to the first resource reservation information and the second resource reservation information;
  • the transceiver unit 1002 is further configured to send a first message according to the first candidate resource.
  • the processing unit 1001 is specifically configured to determine a candidate resource set; determine a first candidate resource according to the candidate resource set, the first resource reservation information and the second resource reservation information , wherein the first candidate resource is a subset of the candidate resource set.
  • the processing unit 1001 is specifically configured to determine a first reserved resource set according to the first resource reservation information, where the first reserved resource set is a subset of the candidate resource set ; According to the second resource reservation information, determine a second reserved resource set, the second reserved resource set is a subset of the candidate resource set; Exclude the first reserved resource set in the candidate resource set The reserved resource set and the second reserved resource set are used to determine the first candidate resource.
  • the candidate resource set is a candidate resource corresponding to the first perception window
  • the processing unit 1001 is specifically configured to determine a first excluded resource set from the candidate resource set according to the candidate resource set and the first reserved resource set; according to the candidate resource set and the second reserved resource set A resource set, determining a second excluded resource set from the candidate resource set; in the candidate resource set, excluding resources other than the first excluded resource set and the second excluded resource set to determine the first candidate resource.
  • the candidate resource set includes candidate resources corresponding to the first perception window and candidate resources after the second perception window;
  • the processing unit 1001 is specifically configured to determine a first available resource set from the candidate resources corresponding to the first perception window according to the candidate resources corresponding to the first perception window and the first reserved resource set; according to the The candidate resources after the second perception window and the second reserved resource set, determine a second available resource set from the candidate resources after the second perception window; according to the first available resource set and the second available resource set set, and determine the first candidate resource.
  • the processing unit 1001 is specifically configured to determine the first reserved resource set according to the first resource reservation information and the first threshold; according to the second resource reservation information and the second threshold, to determine the second reserved resource set; wherein the first threshold and the second threshold are respectively configured through signaling.
  • the processing unit 1001 is specifically configured to determine the target candidate resource in the first available resource set; or if the resources in the first available resource set are less than the required number of candidate resources, in the determining target candidate resources from the first available resource set and the second available resource set;
  • the transceiver unit 1002 is specifically configured to send the first message according to the target candidate resource.
  • the processing unit 1001 is further configured to, before determining the first candidate resource according to the first resource reservation information and the second resource reservation information, determine based on the first perception window
  • the resource monitoring function is configured or activated; or it is determined based on the configuration information of the first perception window that the interval between candidate monitoring sub-windows in the first perception window is a positive integer.
  • the length of the second perception window is N-Tp, where the N is a positive integer, and the Tp is a parameter determined by the processing time of the communication device, which is an integer from 0 to 30; or,
  • the length of the second sensing window is a value determined in the configured service period that is less than or equal to the first period.
  • the value of the first period is equal to the interval between candidate listening sub-windows in the first sensing window.
  • the second sensing window is composed of a plurality of discontinuous monitoring sub-windows in the time domain.
  • the processing unit 1001 is further configured to determine a second candidate resource, where the second candidate resource is located after a fourth perception window, and the fourth perception window is located after the first candidate resource and located in before the second candidate resource;
  • the transceiver unit 1002 is further configured to send the first message according to the second candidate resource.
  • the apparatus 1000 is applied to a first device, where the first device may be a terminal device, and the terminal device is a sending device.
  • the processing unit 1001 is configured to determine a first candidate resource according to the monitoring result in the third perception window, the first candidate resource is located after the third perception window, and the third perception window is located in the resource After selecting the trigger; determining a second candidate resource, the second candidate resource is located after a fourth perception window, and the fourth perception window is located after the first candidate resource and before the second candidate resource;
  • the transceiver unit 1002 is configured to send a first message according to the first candidate resource and the second candidate resource.
  • the processing unit 1001 is specifically configured to determine the second candidate resource according to the third sensing window and/or the monitoring result in the third sensing window.
  • the interval between the last monitoring resource of the third sensing window and the first transmission resource of the first message in the first candidate resource is not less than T3; and/or,
  • the interval between the last monitoring resource of the fourth perception window and the first transmission resource of the first message in the second candidate resource is not less than T3; and/or,
  • the interval between the last transmission resource of the first message in the first candidate resource and the first monitoring resource in the fourth perception window is T4;
  • T3 and T4 are non-negative constants.
  • the T3 is 3 time slots; or,
  • the T3 is 5 time slots; or,
  • the T3 is 9 time slots; or,
  • the T3 is 17 time slots.
  • the T4 is a non-negative constant
  • the T4 a+c, where a is the interval between the last transmission of the first message in the first candidate resource and the arrival time of the corresponding feedback message, and c is the time when the first device detects the feedback message.
  • the last transmission of the first message to the corresponding feedback message is a NACK response message.
  • the transceiver unit 1002 is further configured to perform detection on a fourth perception window for feedback-based transmission when one or more of the following conditions are established, so as to acquire the first message
  • the number of times of transmission of the first message in the first candidate resource is less than the maximum number of retransmissions of the first message
  • the distance from the communication device to the target device of the first message is less than the communication distance required by the first message.
  • each functional unit in each embodiment of the present application It can be integrated in one processing unit, or it can exist physically alone, or two or more units can be integrated in one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium.
  • the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
  • an embodiment of the present application further provides a schematic structural diagram of a communication apparatus 1100 .
  • the apparatus 1100 may be configured to implement the methods described in the foregoing method embodiments applied to devices, and reference may be made to the descriptions in the foregoing method embodiments.
  • the apparatus 1100 may be in or be a device.
  • the device may be the first device.
  • the apparatus 1100 includes one or more processors 1101 .
  • the processor 1101 may be a general-purpose processor or a special-purpose processor or the like. For example, it may be a baseband processor, or a central processing unit.
  • the baseband processor may be used to process communication protocols and communication data
  • the central processing unit may be used to control communication devices (eg, base stations, terminals, or chips, etc.), execute software programs, and process data of software programs.
  • the communication device may include a transceiving unit for implementing signal input (reception) and output (transmission).
  • the transceiver unit may be a transceiver, a radio frequency chip, or the like.
  • the apparatus 1100 includes one or more of the processors 1101, and the one or more processors 1101 can implement the method of the apparatus in the above-described embodiment.
  • processor 1101 may also implement other functions in addition to implementing the methods in the above-described embodiments.
  • the processor 1101 may execute instructions, so that the apparatus 1100 executes the methods described in the foregoing method embodiments.
  • the instructions may be stored in whole or in part within the processor, such as instruction 1103, or may be stored in whole or in part in a memory 1102 coupled to the processor, such as instruction 1104, or may be jointly caused by instructions 1103 and 1104.
  • the apparatus 1100 executes the methods described in the above method embodiments.
  • the communication apparatus 1100 may also include a circuit, and the circuit may implement the functions of the devices in the foregoing method embodiments.
  • the apparatus 1100 may include one or more memories 1102 having stored thereon instructions 1104 that may be executed on the processor to cause the apparatus 1100 to perform the above-described method methods described in the examples.
  • data may also be stored in the memory.
  • Instructions and/or data may also be stored in the optional processor.
  • the one or more memories 1102 may store the correspondences described in the foregoing embodiments, or related parameters or tables involved in the foregoing embodiments, and the like.
  • the processor and the memory can be provided separately or integrated together.
  • the apparatus 1100 may further include a transceiver unit 1105 and an antenna 1106 .
  • the processor 1101 may be referred to as a processing unit, and controls an apparatus (terminal or base station).
  • the transceiver unit 1105 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the device through the antenna 1106 .
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • Embodiments of the present application further provide a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, implements the communication method described in any of the foregoing method embodiments applied to a device.
  • An embodiment of the present application further provides a computer program product, which implements the communication method described in any of the above method embodiments applied to a device when the computer program product is executed by a computer.
  • An embodiment of the present application further provides a communication system, where the communication system includes a first device and a second device, where the first device is configured to implement the communication method described in any of the foregoing method embodiments, and the second device for receiving a message from the first device.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, optical fiber, Digital Subscriber Line, DSL) or wireless (eg infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks, SSD)) etc.
  • An embodiment of the present application further provides a processing apparatus, including a processor and an interface; the processor is configured to execute the communication method described in any of the foregoing method embodiments applied to a device.
  • the above-mentioned processing device may be a chip, and the processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software
  • the processor can be a general-purpose processor, which is realized by reading the software codes stored in the memory, and the memory can be integrated in the processor, and can be located outside the processor and exist independently.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solutions of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium can be any available medium that a computer can access.
  • computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or be capable of carrying or storing instructions or data structures in the form of desired program code and any other medium that can be accessed by a computer. also.
  • any connection can be appropriately made into a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fusing of the pertinent medium.
  • Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc, where disks usually reproduce data magnetically, while discs Lasers are used to optically copy data. Combinations of the above should also be included within the scope of computer-readable media.

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Abstract

Des modes de réalisation de la présente invention concernent un procédé de communication et un appareil, qui sont utilisés pour améliorer les performances et la fiabilité de transmission. Le procédé de communication comprend les étapes suivantes : un premier dispositif obtient des premières informations de réservation de ressource dans une première fenêtre de détection et des secondes informations de réservation de ressource dans une seconde fenêtre de détection, la première fenêtre de détection étant située avant un moment où une sélection de ressource est déclenchée, la seconde fenêtre de détection étant située après le moment où une sélection de ressource est déclenchée, et la première fenêtre de détection étant constituée de ressources de domaine temporel non contiguës dans le domaine temporel ; le premier dispositif détermine une première ressource candidate en fonction des premières informations de réservation de ressource et des secondes informations de réservation de ressource ; et le premier dispositif envoie un premier message selon la première ressource candidate.
PCT/CN2022/071792 2021-01-15 2022-01-13 Procédé et appareil de communication WO2022152208A1 (fr)

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