WO2024002100A1 - Resource exclusion method and apparatus for monitoring sidelink control information (sci) - Google Patents

Resource exclusion method and apparatus for monitoring sidelink control information (sci) Download PDF

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Publication number
WO2024002100A1
WO2024002100A1 PCT/CN2023/102893 CN2023102893W WO2024002100A1 WO 2024002100 A1 WO2024002100 A1 WO 2024002100A1 CN 2023102893 W CN2023102893 W CN 2023102893W WO 2024002100 A1 WO2024002100 A1 WO 2024002100A1
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sci
current
resource
lte
type
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PCT/CN2023/102893
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French (fr)
Chinese (zh)
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周莹霞
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深圳市中兴微电子技术有限公司
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Publication of WO2024002100A1 publication Critical patent/WO2024002100A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink

Definitions

  • Embodiments of the present disclosure relate to the field of communications, and specifically, to a resource exclusion method and device for intercepting sidelink control information SCI.
  • C-V2X is the abbreviation of Cellular-V2X, which is V2X based on cellular networks.
  • V2X Vehicle to Everything refers to data communication between cars and between cars and other devices. It can be applied to a series of scenarios such as road safety, autonomous driving, advanced driving assistance systems, road status awareness, and mobility services.
  • LTE-V2X and NR-V2X are sideline communication standards currently developed by 3GPP to support two V2X services.
  • LTE-V2X in scenarios where there is no cellular network coverage, the terminal supports independent transmission resource selection. In the process of future resource independent selection, it is necessary to poll and judge the listening results of the historical sensing window. The implementation process will involve a large number of loop nesting and conditional judgments, which puts forward higher requirements for symbol-level timing processing.
  • Embodiments of the present disclosure provide a resource exclusion method and device for listening to sidelink control information SCI, to at least solve the resource selection problem caused by the high complexity of LTE-V2X terminal sidelink transmission sensing window listening SCI resource selection in related technologies.
  • a resource exclusion method for listening to sidelink control information SCI including: the first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, For each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control information SCI; obtains the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI; according to The above resource reservation information is used to exclude candidate available resources for future resource selection windows.
  • a resource exclusion device for listening to sidelink control information SCI, including: a decoding module configured to enable the first LTE-V2X terminal to listen to the second LTE-V2X terminal within the sensing window. For each downlink available subframe of the SCI sent by the V2X terminal, the above-mentioned first LTE-V2X terminal decodes the current sidelink control information SCI; the acquisition module is configured to acquire the above-mentioned second according to the scheduling type and transmission type of the above-mentioned current SCI.
  • the resource reservation information of the LTE-V2X terminal; the exclusion module is configured to exclude available resources for future resource selection window candidates based on the above resource reservation information.
  • a computer-readable storage medium is also provided.
  • a computer program is stored in the computer-readable storage medium, wherein the computer program is configured to execute any of the above methods when running. Steps in Examples.
  • an electronic device including a memory and a processor.
  • a computer program is stored in the memory, and the processor is configured to run the computer program to perform any of the above. Real method steps in the example.
  • Figure 1 is a schematic diagram of the application environment of the resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure
  • Figure 2 is a flow chart of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure
  • Figure 3 is a schematic diagram of an application scenario of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure
  • Figure 4 is a schematic diagram of an application scenario of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure
  • Figure 5 is a flow chart of SPS type SCI resource exclusion in the resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure
  • Figure 6 is a flow chart of EVENT type SCI resource exclusion in the resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure
  • Figure 7 is a structural block diagram of a resource exclusion device for listening to sidelink control information SCI according to an embodiment of the present disclosure.
  • UE User Equipment, user equipment
  • CBR Chanel Busy Rate, channel busy rate
  • MCS Modulation and Coding Scheme, modulation and coding method
  • RSRP Reference Signal Received Power, reference signal received power
  • SL-RSRP Sidelink-REference Signal Received Power, sidelink reference signal received power
  • SCI SideLink Control Information, side link control information
  • RIV Resource Indication Value, resource indication value
  • SPS Semi-Persistent Scheduling, semi-static scheduling
  • PSSCH Physical Sidelink Shared Channel, physical sidelink shared channel
  • PSCCH Physical Sidelink Control Channel, physical sidelink control channel
  • TB Transmission Block, data transmission block.
  • FIG. 1 is a hardware structure block diagram of a mobile terminal of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure.
  • the mobile terminal may include one or more (only one is shown in Figure 1) processors 102 (the processor 102 may include but is not limited to a microprocessor (Microcontroller Unit, MCU) or a programmable logic device ( Field Programmable Gate Array (FPGA) and other processing devices) and a memory 104 for storing data, wherein the above-mentioned mobile terminal may also include a transmission device 106 and an input and output device 108 for communication functions.
  • MCU Microcontroller Unit
  • FPGA Field Programmable Gate Array
  • the structure shown in Figure 1 is only illustrative, and it does not limit the structure of the above-mentioned mobile terminal.
  • the mobile terminal may also include more or fewer components than shown in FIG. 1 , or have a different configuration than shown in FIG. 1 .
  • the memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the resource exclusion method for listening to side link control information SCI in the embodiment of the present disclosure.
  • the processor 102 runs the computer program stored in The computer program in the memory 104 executes various functional applications and data processing, that is, implements the above method.
  • Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory.
  • the memory 104 may further include memory located remotely relative to the processor 102, and these remote memories may be connected to the mobile terminal through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.
  • Transmission device 106 is used to receive or send data via a network.
  • Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of the mobile terminal.
  • the transmission device 106 includes a network adapter (Network Interface Controller, NIC for short), which can be connected to other network devices through a base station to communicate with the Internet.
  • the transmission device 106 may be a radio frequency (Radio Frequency, RF for short) module, which is used to communicate with the Internet wirelessly.
  • NIC Network Interface Controller
  • FIG. 1 is a flow chart according to an embodiment of the present disclosure. As shown in Figure 2, the process includes the following steps:
  • Step S202 the first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, and for each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control information SCI;
  • Step S204 Obtain the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI;
  • Step S206 Exclude candidate available resources for future resource selection windows based on the resource reservation information.
  • the first LTE-V2X terminal is not limited to being a local terminal, and the second LTE-V2X terminal is not limited to being a peer terminal for transmitting data.
  • the resource reservation information used by the local terminal to transmit data to the opposite end is determined, so as to select and exclude available resources in the future.
  • the available resources for future resource selection window candidates are not limited to when the first LTE-V2X terminal interacts with the second LTE-V2X terminal, listening is performed based on the current resource selection window to determine the resources reserved for the current resource selection window to occupy in the future, By excluding resources that have been occupied, resources that have not yet been reserved and can be occupied for the future resource selection window are determined. By excluding available resources as candidates for future resource selection windows, the complexity of resource selection by the terminal can be reduced, the timing pressure of the terminal in resource selection can also be alleviated, and the impact of resource selection on the process can be reduced.
  • the resource reservation information of the terminal is obtained according to the scheduling type and transmission type of the current SCI, it is possible to exclude available resources for future resource selection window candidates based on the resource reservation information, thereby realizing sensing window listening. SCI exclusion, thereby providing an effective set of candidate available resources for local sidelink uplink transmission. It effectively solves the possibility of redundancy elimination and omission elimination problems, and solves the problem in related technologies that the LTE-V2X terminal side-link transmission sensing window listening SCI resource selection is complicated and has limited improvement in resource selection efficiency, achieving the goal of improving resources. Choose the technical effect of efficiency.
  • the first LTE-V2X terminal after the first LTE-V2X terminal decodes the side-2 link control information SCI, it also includes: the first LTE-V2X terminal determines based on the resource reservation period field obtained by decoding the current SCI.
  • the scheduling type of the current SCI of the second LTE-V2X terminal where the scheduling type includes periodic type and event type.
  • the redundant SCI data results are conditionally judged and eliminated during the sensing process according to the transmission characteristics of V2X.
  • the SCI listened in the sensing window is divided into two scheduling types according to the resource reservation period: one is periodic SCI, that is, SPS (semi-static scheduling periodic) type SCI, which requires Periodically reserve time-frequency resources; the second is event-type SCI, that is, EVENT (event-type scheduled event-based) SCI, which reserves time-frequency resources for at most two transmissions: initial transmission and retransmission.
  • the transmission type is not limited to include initial transmission and retransmission. Initial transmission instructions this time It is the first transmission, and the retransmission indicates that this is the second transmission.
  • the transmission interval between initial transmission and retransmission does not exceed 15 logical subframes at most.
  • the maximum absolute subframe does not exceed 64 (unit: ms ).
  • the decoded information data of the two types of SCI can be stored separately, one as the T/ms perception window of the SPS-type SCI, and the other as the T'/ms perception window of the EVENT-type SCI, which greatly saves memory from the longitudinal dimension of space.
  • the SPS type SCI received in the sensing window There are two possible scenarios for the SPS type SCI received in the sensing window. One is that there is at least a complete periodic transmission result, that is, both the initial transmission and the retransmission are within the sensing window; the other is that there is not a complete periodic transmission. As a result, the initial transmission or retransmission is not within the sensing window.
  • scenario one As shown in Figure 3-1, the opposite end UE has completed the initial transmission and retransmission in the latest cycle m+4. During the sensing process, the local UE will listen to the initial transmission and retransmission at the corresponding time and frequency position. The scenario is not limited to falling back to the time and frequency position of the initial transmission for judgment. Only the SCI result of the initial transmission position of the latest cycle is saved as the basis for exclusion of future resource reservations for the peer UE. There is no need to repeatedly exclude the remaining cycles. Transmit SCI results and historical retransmitted SCI results.
  • the opposite end UE has only completed the initial transmission in the latest cycle m+4, and the retransmission will fall into the future resource selection window.
  • the initial transmission SCI result of the latest cycle is used as the opposite end UE Resource exclusion basis for future resource reservations.
  • the essential difference from the periodic transmission of the opposite end UE in Figure 3-1 is that it is necessary to exclude the retransmission transmission of the current cycle m+4 from falling into the future resource selection window to prevent resource selection failure or transmission failure caused by leakage.
  • Scenario 2 will be explained in detail. As shown in Figure 4, there is no complete periodic transmission result within the sensing window. For complex channel conditions, the possibility of initial transmission failure of the opposite UE cannot be ruled out. In this scenario, in order to prevent excessive exclusion of the sensing window SCI causes unreliable resource exclusion results. Each time a SCI is received and indicated as a retransmission, based on the logical subframe offset between the initial transmission and the retransmission, it falls back to the corresponding time and frequency position and searches whether the same initial SCI exists. If the result does not exist, the current retransmitted SCI result needs to be retained to ensure the validity of the SCI result in the sensing window.
  • obtaining the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI also includes:
  • S13 Determine whether the resource occupation position of the current SCI is the same as the resource occupation of the historical SCI, and obtain resource reservation information.
  • the retransmission indication in the current decoded SCI information determine whether the current transmission type is initial transmission or retransmission and time-frequency position;
  • the current transmission type is initial transmission, based on the starting subchannel index of initial transmission in the SCI information and the occupied continuous subchannel length, based on the current resource reservation period, it is converted into a logical subframe offset and shifted forward.
  • the same PSSCH and PSCCH or PSSCH
  • the SCI result of the initial transmission subframe After determining that the current transmission type is initial transmission, based on the starting subchannel index of initial transmission in the SCI information and the occupied continuous subchannel length, based on the current resource reservation period, it is converted into a logical subframe offset and shifted forward. Check back whether the same PSSCH and PSCCH (or PSSCH) exist at the corresponding sub-channel position in the previous cycle. If so, it means that the initial transmission result of the current cycle will be cleared by the SCI result of the forward offset subframe, and only the SCI result of the current
  • determining whether the resource occupation position of the current SCI is the same as the resource occupation of the historical SCI includes:
  • S13-1 Calculate the time domain position of the subframe in the previous cycle based on the current SCI resource pre-period domain and the current TDD subframe allocation format;
  • S13-3 Traverse all historical SCIs of the subframes of the previous period to determine whether the resource occupancy position of the historical SCI subframe is the same as the resource occupancy position of the current SCI.
  • excluding candidate available resources for future resource selection windows based on resource reservation information includes:
  • excluding candidate available resources for future resource selection windows based on resource reservation information also includes:
  • Event-type SCI in each downlink available subframe, it is determined whether the current transmission type is initial transmission or retransmission based on the retransmission indication in the current decoded SCI information.
  • the SCI information of the current initial transmission is stored; when it is determined that the current transmission type is retransmission, the SCI information of the current retransmission is not stored.
  • the conditions for listening SCI for future resource selection windows and excluding future reservation resources can be decomposed into:
  • the terminal In LTE-V2X, in scenarios without cellular network coverage, the terminal supports independent transmission resource selection.
  • the protocol stack receives a data transmission request from the air interface, it will immediately schedule the authorized service transmission request to the physical layer. thing After receiving the scheduling request message, the management layer will immediately perform the following process to determine the sending resources based on the current channel busy rate (CBR) and scheduling priority:
  • CBR channel busy rate
  • time and frequency transmission resources are randomly selected from the remaining available candidate resource sets for initial transmission and retransmission.
  • a sidelink data TB (Transmission Block) is transmitted up to 2 times, namely initial transmission and one retransmission.
  • the SCI code stream carried on the PSCCH Can indicate the time and frequency resources of these two transmissions.
  • the terminal supports autonomous selection of sending resources, which is based on resource reservation, resource awareness, resource exclusion and resource selection. Specifically, the terminal sends the SCI to reserve time-frequency resources, and other terminals use resource sensing to exclude the resources reserved by the UE, and avoid resource collisions with other terminals during transmission by selecting time-frequency resources that have not been excluded.
  • the UE will measure the policy link reference signal received power (SL-RSRP) of the PSSCH scheduled by the SCI. If the measured SL-RSRP is greater than the RSRP threshold, the UE will further determine whether the resources indicated by the RIV, SFgap, Retransmission index and Resource reservation fields in the SCI overlap with the candidate available resources in the resource selection window in the time-frequency domain. If there is an overlap, the candidate available resource needs to be excluded from the resource candidate set.
  • SL-RSRP policy link reference signal received power
  • the UE will listen to the SCI of the currently enabled resource pool, and after decoding the SCI code stream data, obtain the sending information of the peer end, which is not limited to including: retransmission indication, initial retransmission logical subframe Frame interval, RIV (indicates the starting position of the subchannel for initial transmission and retransmission and the occupied continuous subchannel length), and resource reservation period.
  • the scheduling type of each decoding SCI on each downlink available subframe is determined; through the scheduling characteristics of different types of SCI, the per-subframe storage of the perceptual window decoding SCI results is distinguished.
  • the logical subframe interval of the initial retransmission, RIV indicating the starting position of the subchannel for initial transmission and retransmission and the occupied continuous subchannel length
  • resource reservation Cycle and other information through the transmission characteristics of different types of SCI, determine whether the same SCI transmission result exists in the current cycle or the previous cycle, thereby reducing the resource exclusion of redundant SCI results in future resource selection windows.
  • the decoded SCI data of the historical sensing window is excluded from the peer reserved resources of the future resource selection window T/ms forward, thereby retaining the available candidate resource set and providing it for the initial transmission and re-transmission of the local authorization service. Random selection of transmitted time and frequency resources.
  • the decoded SCI is classified, stored and effectively eliminated in advance, so that when the resource selection subframe arrives, the only valid SCI transmission result of the peer end can be quickly located, and the corresponding information can be used based on the corresponding information. Use this information to exclude resources reserved in the future resource selection window.
  • the pre-exclusion process of decoding SCI is not limited to judging the scheduling type of SCI based on the resource reservation period field of decoding SCI, and dividing the scheduling type into: EVENT type SCI and SPS type SCI.
  • the transmission type of the opposite end is initial transmission or retransmission.
  • the specific method is not limited to determining whether the Restransmission Index is non-0. If it is non-zero, it determines that the transmission type is initial transmission, and if it is 0, it determines that the transmission type is retransmission.
  • Step 1.1 SCI data storage.
  • Step1.2 (Initial transmission): Calculate the initial transmission logical subframe of the previous cycle based on Rsvp and the current TDD subframe ratio.
  • the value range of the resource reservation period is ⁇ 0, 20, 50, 100, 200, 300,..., 1000 ⁇ ms, and the unit is absolute sub frame.
  • the current TDD subframe allocation format corresponding to the sidelink transmission step size of TabIe 14.1.1-1 in the 36.213 protocol, the logical subframe time domain position of the previous cycle is calculated.
  • the frequency domain position can indicate the RIV value in the SCI information, and convert the initial transmission starting subchannel position and occupied contiguity through 14.1.1.4C in the 36.213 protocol. sub-channel size to determine whether they are the same. If there is an initial transmission with the same frequency domain position, the initial transmission SCI information of the peer in the previous cycle in the sensing window is eliminated.
  • Step1.4 Initial transmission: Are the SubCHStartld and LsubCH of the current SCI initial transmission equal to the SubCHStartld and LsubCH of the historical SCI initial transmission respectively? If the judgment is yes, that is, when the SubCHStartld and LsubCH of the current SCI initial transmission are respectively equal to the SubCHStartld and LsubCH of the historical SCI initial transmission, the historical initial transmission SCI information of the previous cycle is proposed. If the judgment is negative, that is, if the SubCHStartld and LsubCH initially transmitted by the current SCI are not equal to the SubCHStartld and LsubCH initially transmitted by the historical SCI, execute Step 1.3 (initial transmission) again.
  • Step 2.1 (initial transmission): Calculate the initial transmission logical subframe of the current cycle based on SFgap and the current TDD subframe ratio.
  • Step2.2 (initial transmission): Position the SCI data of the historical subframe position in the sensing window.
  • Step 1.4 (initial transmission) is performed: Are the SubCHStartld and LsubCH of the current SCI initial transmission equal to the SubCHStartld and LsubCH of the historical SCI initial transmission respectively? If the judgment is negative, the currently retransmitted SCI data is saved.
  • Step 1.2 initial transmission
  • Step 1.3 initial transmission
  • Step 1.4 initial transmission again: the SubCHStartld and LsubCH of the current SCI initial transmission are equal to the historical SCI initial transmission respectively. Passed SubCHStartld and LsubCH? If the judgment is negative, perform Step 1.3 (initial transmission) again.
  • the peer's transmission type is determined. There are two types: initial transmission or retransmission. The specific method is not limited to determining whether the Restransmission Index is non-0. If it is non-zero, it determines that the transmission type is initial transmission, and if it is 0, it determines that the transmission type is retransmission.
  • the SCI data is stored, which is not limited to storing the data structure corresponding to the SCI.
  • it is determined to be a retransmission it is determined to be historical transmission relative to the resource selection window, and the data structure corresponding to the SCI is not saved.
  • each downlink available subframe needs to be stored.
  • Two types of data storage are distinguished according to the scheduling type of SCI, which greatly saves memory usage. space.
  • SCI information initially transmitted in the latest cycle of the peer end is retained, and the retransmission position is indicated. This not only solves the problem of redundant sensing result storage, but also reduces the need for redundant sensing results in the resource selection subframe.
  • the number of resource exclusions for the redundant SCI result of the sensing window also takes into account that during the periodic transmission of SPS-type SCI, if the current channel conditions do not meet the channel busy rate inequality, a certain initial transmission or a certain retransmission will be lost. All valid sensing window SCI results are retained in the sensing window, thereby providing effective and streamlined sensing window data results for resource overlap judgment in resource selection windows.
  • future resource selection windows since the periodic repetition of periodic transmission of SCI has been eliminated in the sensing process, when the resource selection subframe arrives, the only valid SCI transmission result of the opposite end can be quickly located. And based on the corresponding information, the resources reserved in the future resource selection window are excluded. Efficiently save search time, thereby realizing the fastest listening SCI elimination in the sensing window, thereby providing an effective set of candidate available resources for local sidelink uplink transmission, and reducing the pressure on resource selection and tight timing.
  • the method according to the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is Better implementation.
  • the technical solution of the present disclosure can be embodied in the form of a software product in nature or in part that contributes to the existing technology.
  • the computer software product is stored in a storage medium (such as read-only memory/random access memory).
  • the memory Read-Only Memory/Random Access Memory, ROM/RAM), magnetic disk, optical disk
  • includes several instructions to cause a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the disclosure Methods described in various embodiments.
  • This embodiment also provides a resource exclusion device for listening to sidelink control information SCI.
  • This device is used to implement the above embodiments and preferred implementations. What has already been explained will not be described again.
  • the term "module” may be a combination of software and/or hardware that implements a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
  • Figure 7 is a structural block diagram of a resource exclusion device for listening to sidelink control information SCI according to an embodiment of the present disclosure. As shown in Figure 7, the device includes:
  • the decoding module 72 is configured so that the first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, and for each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control information. SCI;
  • the acquisition module 74 is configured to obtain the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI;
  • the exclusion module 76 is configured to exclude candidate available resources for future resource selection windows based on the resource reservation information.
  • the above-mentioned resource exclusion device for listening to sidelink control information SCI also includes a first judgment module configured to: after the first LTE-V2X terminal decodes the sidelink-2 link control information SCI, the first The LTE-V2X terminal determines the scheduling type of the current SCI of the second LTE-V2X terminal based on the resource reservation period field obtained by decoding the current SCI, where the scheduling type includes periodic type and event type.
  • the above-mentioned acquisition module 74 also includes: when the scheduling type of the current SCI is periodic, determine the transmission type of the current SCI; when the transmission type of the current SCI is initial transmission, save the current SCI Data structure; determine whether the resource occupancy position of the current SCI is the same as the resource occupancy of the historical SCI, and obtain resource reservation information.
  • the above-mentioned acquisition module 74 determines the resource occupation position of the current SCI and the resource occupation of the historical SCI. Whether the usage is the same, including: calculating the time domain position of the previous period subframe based on the current SCI resource pre-period domain and the current TDD subframe allocation format; in the positioning sensing window, it is located at the time domain position of the previous period subframe SCI data; traverse all historical SCI of the subframe of the previous period to determine whether the resource occupation position of the historical SCI historical subframe is the same as the resource occupation position of the current SCI.
  • the above-mentioned resource exclusion device for listening to sidelink control information SCI also includes a first judgment module configured to, after determining the transmission type of the current SCI, when the transmission type of the current SCI is retransmission , determine whether there is an initial transmission with SCI indicating the same frequency domain position in the subframe of the previous period; if there is an initial transmission with SCI indicating the same frequency domain position in the subframe of the previous period, determine whether there is an initial transmission in the subframe of the previous period Retransmission at the same frequency domain location.
  • the above-mentioned elimination module 76 also includes: when the resource reservation information indicates that the resource occupation position of the historical subframe of the historical SCI is the same as the resource occupation position of the current SCI, eliminate the historical SCI saved in the sensing window; When the resource reservation information indicates that there is a retransmission at the same frequency domain position, the retransmission SCI of the previous cycle saved in the sensing window is eliminated, and the current retransmission SCI is not saved; when the resource reservation information indicates that there is no retransmission in the previous cycle. If there is an initial transmission with SCI indicating the same frequency domain position, the data structure of the current retransmission SCI is saved.
  • the above exclusion module 76 also includes: saving the data structure of the current SCI when the resource reservation information indicates that the scheduling type of the current SCI is event type and the transmission type is initial transmission; When the scheduling type of the current SCI is event type and the transmission type is retransmission, the data structure of the current SCI is not saved.
  • each of the above modules can be implemented through software or hardware.
  • it can be implemented in the following ways, but is not limited to this: the above modules are all located in the same processor; or the above modules can be implemented in any combination.
  • the forms are located in different processors.
  • Embodiments of the present disclosure also provide a computer-readable storage medium that stores a computer program, wherein the computer program is configured to execute the steps in any of the above method embodiments when running.
  • the computer-readable storage medium may include but is not limited to: U disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM) , mobile hard disk, magnetic disk or optical disk and other media that can store computer programs.
  • ROM read-only memory
  • RAM random access memory
  • mobile hard disk magnetic disk or optical disk and other media that can store computer programs.
  • Embodiments of the present disclosure also provide an electronic device, including a memory and a processor.
  • a computer program is stored in the memory, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.
  • the above-mentioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the above-mentioned processor, and the input-output device is connected to the above-mentioned processor.
  • each module or each step of the above-mentioned embodiments of the present disclosure can be implemented by a general computing device, and they can be concentrated on a single computing device, or distributed among multiple computing devices. over a network, they may be implemented with program code executable by a computing device, such that they may be stored in a storage device for execution by the computing device, and in some cases, may be executed in a sequence different from that described here.
  • the steps shown or described may be implemented by fabricating them separately into individual integrated circuit modules, or by fabricating multiple modules or steps among them into a single integrated circuit module. As such, the present disclosure is not limited to any specific combination of hardware and software.

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Abstract

Embodiments of the present disclosure provide a resource exclusion method and apparatus for monitoring sidelink control information (SCI). The method comprises: a first LTE-V2X terminal monitoring, within a sensing window, SCI sent by a second LTE-V2X terminal, and for each downlink available subframe, the first LTE-V2X terminal decoding current SCI; obtaining resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI; and performing candidate available resource exclusion for a future resource selection window according to the resource reservation information.

Description

侦听侧行链路控制信息SCI的资源排除方法和装置Resource exclusion method and device for intercepting sidelink control information SCI 技术领域Technical field
本公开实施例涉及通信领域，具体而言，涉及一种侦听侧行链路控制信息SCI的资源排除方法和装置。Embodiments of the present disclosure relate to the field of communications, and specifically, to a resource exclusion method and device for intercepting sidelink control information SCI.
背景技术Background technique
C-V2X是Cellular-V2X的简称，即基于蜂窝网络的V2X。V2X(Vehicle to Everything)是指汽车之间、以及汽车和其它设备之间的数据通信，可应用于道路安全、自动驾驶、先进驾驶辅助***、道路状态感知、移动***等一系列场景。C-V2X is the abbreviation of Cellular-V2X, which is V2X based on cellular networks. V2X (Vehicle to Everything) refers to data communication between cars and between cars and other devices. It can be applied to a series of scenarios such as road safety, autonomous driving, advanced driving assistance systems, road status awareness, and mobility services.
LTE-V2X和NR-V2X是目前3GPP制定的支持两个V2X业务的侧行通信标准。在LTE-V2X中，在没有蜂窝网络覆盖的场景下，终端支持自主进行发送资源选择的方式，而在未来资源自主选择过程中，需要对历史感知窗的侦听结果进行轮询及判断，在实现过程中会涉及大量的循环嵌套与条件判断，而这对符号级的时序处理提出了更高的要求。LTE-V2X and NR-V2X are sideline communication standards currently developed by 3GPP to support two V2X services. In LTE-V2X, in scenarios where there is no cellular network coverage, the terminal supports independent transmission resource selection. In the process of future resource independent selection, it is necessary to poll and judge the listening results of the historical sensing window. The implementation process will involve a large number of loop nesting and conditional judgments, which puts forward higher requirements for symbol-level timing processing.
目前许多现有的实现方案中，一是通过空间换取时间的方式来提高自主资源选择的效率，二是通过时间换取空间的方式来提高自主资源选择的效率。但这两种方式，都无法降低LTE-V2X终端侧行发送感知窗侦听SCI资源选择的复杂度，因此，资源选择效率提升的幅度有限。Among the many existing implementation solutions, one is to improve the efficiency of autonomous resource selection by exchanging space for time, and the other is to improve the efficiency of autonomous resource selection by exchanging time for space. However, neither of these methods can reduce the complexity of LTE-V2X terminal sidelink transmission sensing window listening SCI resource selection. Therefore, the improvement in resource selection efficiency is limited.
发明内容Contents of the invention
本公开实施例提供了一种侦听侧行链路控制信息SCI的资源排除方法和装置，以至少解决相关技术中LTE-V2X终端侧行发送感知窗侦听SCI资源选择复杂高导致的资源选择效率提升幅度有限的问题。Embodiments of the present disclosure provide a resource exclusion method and device for listening to sidelink control information SCI, to at least solve the resource selection problem caused by the high complexity of LTE-V2X terminal sidelink transmission sensing window listening SCI resource selection in related technologies. The problem of limited efficiency improvement.
根据本公开的一个实施例，提供了一种侦听侧行链路控制信息SCI的资源排除方法，包括：第一LTE-V2X终端在感知窗内侦听第二LTE-V2X终端发送的SCI，对于每个下行可用子帧，上述第一LTE-V2X终端解码当前侧行链路控制信息SCI；根据上述当前SCI的调度类型和传输类型获取上述第二LTE-V2X终端的资源预留信息；根据上述资源预留信息进行未来资源选择窗候选可用资源排除。According to an embodiment of the present disclosure, a resource exclusion method for listening to sidelink control information SCI is provided, including: the first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, For each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control information SCI; obtains the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI; according to The above resource reservation information is used to exclude candidate available resources for future resource selection windows.
根据本公开的另一个实施例，提供了一种侦听侧行链路控制信息SCI的资源排除装置，包括：解码模块，设置为第一LTE-V2X终端在感知窗内侦听第二LTE-V2X终端发送的SCI，对于每个下行可用子帧，上述第一LTE-V2X终端解码当前侧行链路控制信息SCI；获取模块，设置为根据上述当前SCI的调度类型和传输类型获取上述第二LTE-V2X终端的资源预留信息；排除模块，设置为根据上述资源预留信息进行未来资源选择窗候选可用资源排除。According to another embodiment of the present disclosure, a resource exclusion device for listening to sidelink control information SCI is provided, including: a decoding module configured to enable the first LTE-V2X terminal to listen to the second LTE-V2X terminal within the sensing window. For each downlink available subframe of the SCI sent by the V2X terminal, the above-mentioned first LTE-V2X terminal decodes the current sidelink control information SCI; the acquisition module is configured to acquire the above-mentioned second according to the scheduling type and transmission type of the above-mentioned current SCI. The resource reservation information of the LTE-V2X terminal; the exclusion module is configured to exclude available resources for future resource selection window candidates based on the above resource reservation information.
根据本公开的又一个实施例，还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机程序，其中，所述计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。According to yet another embodiment of the present disclosure, a computer-readable storage medium is also provided. A computer program is stored in the computer-readable storage medium, wherein the computer program is configured to execute any of the above methods when running. Steps in Examples.
根据本公开的又一个实施例，还提供了一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行上述任一项方法实 施例中的步骤。According to yet another embodiment of the present disclosure, an electronic device is also provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to perform any of the above. Real method steps in the example.
附图说明Description of drawings
图1是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除方法的应用环境示意图；Figure 1 is a schematic diagram of the application environment of the resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure;
图2是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除方法的流程图；Figure 2 is a flow chart of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure;
图3是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除方法的应用场景示意图；Figure 3 is a schematic diagram of an application scenario of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure;
图4是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除方法的应用场景示意图；Figure 4 is a schematic diagram of an application scenario of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure;
图5是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除方法中SPS型SCI资源排除流程图；Figure 5 is a flow chart of SPS type SCI resource exclusion in the resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure;
图6是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除方法中EVENT型SCI资源排除流程图；Figure 6 is a flow chart of EVENT type SCI resource exclusion in the resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure;
图7是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除装置的结构框图。Figure 7 is a structural block diagram of a resource exclusion device for listening to sidelink control information SCI according to an embodiment of the present disclosure.
具体实施方式Detailed ways
下文中将参考附图并结合实施例来详细说明本公开的实施例。Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and embodiments.
需要说明的是，本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。It should be noted that the terms "first", "second", etc. in the description and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
对本申请实施例涉及专业术语进行释义说明：Interpretation of professional terms involved in the embodiments of this application:
UE：User Equipment，用户设备；UE: User Equipment, user equipment;
CBR：Chanel Busy Rate，信道忙率；CBR: Chanel Busy Rate, channel busy rate;
MCS：Modulation and Coding Scheme，调制和编码方式；MCS: Modulation and Coding Scheme, modulation and coding method;
RSRP：Reference Signal Received Power，参考信号接收功率；RSRP: Reference Signal Received Power, reference signal received power;
SL-RSRP：Sidelink-REference Signal Received Power，侧行链路参考信号接收功率；SL-RSRP: Sidelink-REference Signal Received Power, sidelink reference signal received power;
SCI：SideLink Control Information，侧行链路控制信息；SCI: SideLink Control Information, side link control information;
RIV：Resource Indication Value，资源指示值；RIV: Resource Indication Value, resource indication value;
SPS：Semi-Persistent Scheduling，半静态调度；SPS: Semi-Persistent Scheduling, semi-static scheduling;
PSSCH：Physical Sidelink Shared Channel，物理侧行链路共享信道；PSSCH: Physical Sidelink Shared Channel, physical sidelink shared channel;
PSCCH：Physical Sidelink Control Channel，物理侧行链路控制信道；PSCCH: Physical Sidelink Control Channel, physical sidelink control channel;
TB：Transmission Block，数据传输块。TB: Transmission Block, data transmission block.
本公开实施例中所提供的方法实施例可以在移动终端、计算机终端或者类似的运算装置中执行。以运行在移动终端上为例，图1是本公开实施例的一种侦听侧行链路控制信息SCI的资源排除方法的移动终端的硬件结构框图。如图1所示，移动终端可以包括一个或多个(图1中仅示出一个)处理器102(处理器102可以包括但不限于微处理器(Microcontroller Unit，MCU)或可编程逻辑器件(Field Programmable Gate Array，FPGA)等的处理装置)和用于存储数据的存储器104，其中，上述移动终端还可以包括用于通信功能的传输设备106以及输入输出设备108。本领域普通技术人员可以理解，图1所示的结构仅为示意，其并不对上述移动终端的结构造成限定。例如，移动终端还可包括比图1中所示更多或者更少的组件，或者具有与图1所示不同的配置。 The method embodiments provided in the embodiments of the present disclosure can be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, FIG. 1 is a hardware structure block diagram of a mobile terminal of a resource exclusion method for listening to sidelink control information SCI according to an embodiment of the present disclosure. As shown in Figure 1, the mobile terminal may include one or more (only one is shown in Figure 1) processors 102 (the processor 102 may include but is not limited to a microprocessor (Microcontroller Unit, MCU) or a programmable logic device ( Field Programmable Gate Array (FPGA) and other processing devices) and a memory 104 for storing data, wherein the above-mentioned mobile terminal may also include a transmission device 106 and an input and output device 108 for communication functions. Persons of ordinary skill in the art can understand that the structure shown in Figure 1 is only illustrative, and it does not limit the structure of the above-mentioned mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 1 , or have a different configuration than shown in FIG. 1 .
存储器104可用于存储计算机程序，例如，应用软件的软件程序以及模块，如本公开实施例中的侦听侧行链路控制信息SCI的资源排除方法对应的计算机程序，处理器102通过运行存储在存储器104内的计算机程序，从而执行各种功能应用以及数据处理，即实现上述的方法。存储器104可包括高速随机存储器，还可包括非易失性存储器，如一个或者多个磁性存储装置、闪存、或者其他非易失性固态存储器。在一些实例中，存储器104可进一步包括相对于处理器102远程设置的存储器，这些远程存储器可以通过网络连接至移动终端。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the resource exclusion method for listening to side link control information SCI in the embodiment of the present disclosure. The processor 102 runs the computer program stored in The computer program in the memory 104 executes various functional applications and data processing, that is, implements the above method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely relative to the processor 102, and these remote memories may be connected to the mobile terminal through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.
传输设备106用于经由一个网络接收或者发送数据。上述的网络具体实例可包括移动终端的通信供应商提供的无线网络。在一个实例中，传输设备106包括一个网络适配器(Network Interface Controller，简称为NIC)，其可通过基站与其他网络设备相连从而可与互联网进行通讯。在一个实例中，传输设备106可以为射频(Radio Frequency，简称为RF)模块，其用于通过无线方式与互联网进行通讯。Transmission device 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, NIC for short), which can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (Radio Frequency, RF for short) module, which is used to communicate with the Internet wirelessly.
在本实施例中提供了一种侦听侧行链路控制信息SCI的资源排除方法，图1是根据本公开实施例的流程图，如图2所示，该流程包括如下步骤：This embodiment provides a resource exclusion method for listening to sidelink control information SCI. Figure 1 is a flow chart according to an embodiment of the present disclosure. As shown in Figure 2, the process includes the following steps:
步骤S202，第一LTE-V2X终端在感知窗内侦听第二LTE-V2X终端发送的SCI，对于每个下行可用子帧，第一LTE-V2X终端解码当前侧行链路控制信息SCI；Step S202, the first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, and for each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control information SCI;
步骤S204，根据当前SCI的调度类型和传输类型获取第二LTE-V2X终端的资源预留信息；Step S204: Obtain the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI;
步骤S206，根据资源预留信息进行未来资源选择窗候选可用资源排除。Step S206: Exclude candidate available resources for future resource selection windows based on the resource reservation information.
第一LTE-V2X终端不限于为本地终端，第二LTE-V2X终端不限于为传输数据的对端终端。根据SCI的调度类型和传输类型，确定本地终端为对端传输数据所用的资源预留信息，从而进行未来资源选择创可用资源排除。The first LTE-V2X terminal is not limited to being a local terminal, and the second LTE-V2X terminal is not limited to being a peer terminal for transmitting data. According to the scheduling type and transmission type of the SCI, the resource reservation information used by the local terminal to transmit data to the opposite end is determined, so as to select and exclude available resources in the future.
未来资源选择窗候选可用资源不限于为第一LTE-V2X终端与第二LTE-V2X终端终端交互时，基于当前资源选择窗进行侦听以确定当前资源选择窗预约的在未来时刻占用的资源，通过排除已经被占用的资源，从而确定出对于未来资源选择窗而言，尚未被预约、可以被占用的资源。通过对于未来资源选择窗候选可用资源的排除，可以降低终端进行资源选择的复杂度，还可以减缓终端在资源选择紫珍珠宏的时序压力，降低资源选择对进程的影响。The available resources for future resource selection window candidates are not limited to when the first LTE-V2X terminal interacts with the second LTE-V2X terminal, listening is performed based on the current resource selection window to determine the resources reserved for the current resource selection window to occupy in the future, By excluding resources that have been occupied, resources that have not yet been reserved and can be occupied for the future resource selection window are determined. By excluding available resources as candidates for future resource selection windows, the complexity of resource selection by the terminal can be reduced, the timing pressure of the terminal in resource selection can also be alleviated, and the impact of resource selection on the process can be reduced.
在本申请实施例中，由于根据当前SCI的调度类型和传输类型获取终端的资源预留信息，因此，可以根据资源预留信息进行未来资源选择窗候选可用资源排除，从而实现感知窗的侦听SCI排除，进而为本地侧行上行发送提供有效的候选可用资源集合。有效解决了冗余排除及遗漏排除问题出现的可能性，解决了相关技术中LTE-V2X终端侧行发送感知窗侦听SCI资源选择复杂高导致的资源选择效率提升幅度有限的问题，达到提高资源选择效率的技术效果。In this embodiment of the present application, since the resource reservation information of the terminal is obtained according to the scheduling type and transmission type of the current SCI, it is possible to exclude available resources for future resource selection window candidates based on the resource reservation information, thereby realizing sensing window listening. SCI exclusion, thereby providing an effective set of candidate available resources for local sidelink uplink transmission. It effectively solves the possibility of redundancy elimination and omission elimination problems, and solves the problem in related technologies that the LTE-V2X terminal side-link transmission sensing window listening SCI resource selection is complicated and has limited improvement in resource selection efficiency, achieving the goal of improving resources. Choose the technical effect of efficiency.
作为一种可选的实施方式，在第一LTE-V2X终端解码侧行-2链路控制信息SCI之后，还包括：第一LTE-V2X终端基于解码当前SCI得到的资源预留周期域，判断第二LTE-V2X终端的当前SCI的调度类型，其中，调度类型包括周期型和事件型。As an optional implementation manner, after the first LTE-V2X terminal decodes the side-2 link control information SCI, it also includes: the first LTE-V2X terminal determines based on the resource reservation period field obtained by decoding the current SCI. The scheduling type of the current SCI of the second LTE-V2X terminal, where the scheduling type includes periodic type and event type.
在同时考虑空间和时间上的开销的情况下，根据V2X的传输特性在感知过程中对冗余SCI数据结果进行条件判断与剔除。根据SCI的资源预留信息特性，按资源预留周期对感知窗中侦听的SCI区分成两种调度类型：一是周期型SCI，即SPS(半静态调度式的周期性)型SCI，需要周期性地预留时频资源；二是事件型SCI，即EVENT(事件型调度式的事件性)型SCI，至多对初传和重传两次传输预留时频资源。传输类型不限于包括初传和重传。初传指示本次 为初次传输，重传指示本次为二次传输。While considering the space and time overhead, the redundant SCI data results are conditionally judged and eliminated during the sensing process according to the transmission characteristics of V2X. According to the resource reservation information characteristics of SCI, the SCI listened in the sensing window is divided into two scheduling types according to the resource reservation period: one is periodic SCI, that is, SPS (semi-static scheduling periodic) type SCI, which requires Periodically reserve time-frequency resources; the second is event-type SCI, that is, EVENT (event-type scheduled event-based) SCI, which reserves time-frequency resources for at most two transmissions: initial transmission and retransmission. The transmission type is not limited to include initial transmission and retransmission. Initial transmission instructions this time It is the first transmission, and the retransmission indicates that this is the second transmission.
事件型SCI在传输过程中，初传和重传的传输间隔至多不超过15个逻辑子帧，根据资源池中可用子帧的特性，可以计算出最大不超过64个绝对子帧(单位：ms)。那么就说明在T/ms感知窗中，最大可能预约到本地终端未来资源选择窗的对端出现在感知窗末端T’/ms(T’＜＝64ms)这个时间段中，其余时间段的对端已经成为历史传输，仅作为本地终端的信道繁忙比率的参考指标。因此，可以对两类SCI的解码信息数据分别存储，一个作为SPS型SCI的T/ms感知窗存储，一个作为EVENT型SCI的T’/ms感知窗存储，从空间纵向维度，极大地节省内存存储空间，从时间横向维度，极大地节约对两种类型SCI预约资源的遍历搜索过程。基于上述划分，对每个侦听子帧，侦听SCI后执行先验的历史资源排除。During the transmission process of event-type SCI, the transmission interval between initial transmission and retransmission does not exceed 15 logical subframes at most. According to the characteristics of the available subframes in the resource pool, it can be calculated that the maximum absolute subframe does not exceed 64 (unit: ms ). Then it means that in the T/ms sensing window, the peer that is most likely to reserve the future resource selection window of the local terminal appears in the time period T'/ms (T'<=64ms) at the end of the sensing window, and the peer in the remaining time periods The terminal has become a historical transmission and is only used as a reference indicator for the channel busy ratio of the local terminal. Therefore, the decoded information data of the two types of SCI can be stored separately, one as the T/ms perception window of the SPS-type SCI, and the other as the T'/ms perception window of the EVENT-type SCI, which greatly saves memory from the longitudinal dimension of space. Storage space, from the horizontal dimension of time, greatly saves the traversal search process for two types of SCI reservation resources. Based on the above division, for each listening subframe, a priori historical resource exclusion is performed after listening to the SCI.
对感知窗接收到的SPS型SCI，有两种可能场景，一是至少有一个完整的周期性传输结果，也就是初传和重传均在感知窗内；二是没有一个完整的周期性传输结果，也就是初传或重传不在感知窗内。There are two possible scenarios for the SPS type SCI received in the sensing window. One is that there is at least a complete periodic transmission result, that is, both the initial transmission and the retransmission are within the sensing window; the other is that there is not a complete periodic transmission. As a result, the initial transmission or retransmission is not within the sensing window.
针对场景一进行具体说明。如图3-1所示，对端UE最新的一个周期m+4已经将初传和重传传输完毕，在感知过程中本地UE会侦听到对应时频位置的初传和重传，该场景下不限于回退到初传的时频位置进行判断，只保存最新周期的初传位置的SCI结果作为该对端UE的未来资源预留的排除依据，而不需要再重复剔除其余周期的传输SCI结果及历史重传的SCI结果。Let’s give a detailed description of scenario one. As shown in Figure 3-1, the opposite end UE has completed the initial transmission and retransmission in the latest cycle m+4. During the sensing process, the local UE will listen to the initial transmission and retransmission at the corresponding time and frequency position. The scenario is not limited to falling back to the time and frequency position of the initial transmission for judgment. Only the SCI result of the initial transmission position of the latest cycle is saved as the basis for exclusion of future resource reservations for the peer UE. There is no need to repeatedly exclude the remaining cycles. Transmit SCI results and historical retransmitted SCI results.
如图3-2所示，对端UE最新的一个周期m+4仅将初传传输完毕，重传存在落入未来资源选择窗，此时通过最新周期的初传SCI结果作为该对端UE的未来资源预留的资源排除依据。和图3-1的对端UE的周期性传输的本质区别在于，需要排除当前周期m+4的重传传输落入未来资源选择窗，防止漏排导致的资源选择失败或发送失败。As shown in Figure 3-2, the opposite end UE has only completed the initial transmission in the latest cycle m+4, and the retransmission will fall into the future resource selection window. At this time, the initial transmission SCI result of the latest cycle is used as the opposite end UE Resource exclusion basis for future resource reservations. The essential difference from the periodic transmission of the opposite end UE in Figure 3-1 is that it is necessary to exclude the retransmission transmission of the current cycle m+4 from falling into the future resource selection window to prevent resource selection failure or transmission failure caused by leakage.
针对场景二进行具体说明。如图4所示，没有一个完整的周期性传输结果在感知窗内，对于复杂的信道条件，不排除对端UE存在初传传输失败的可能性，在该场景下，为防止过度排除感知窗SCI而导致资源排除结果不可靠，在每一次接收到SCI并指示为重传时，根据初传与重传的逻辑子帧偏移，回退到相应时频位置并检索是否存在相同的SCI初传结果，若不存在，则需要保留当前的重传SCI结果，以保证感知窗中SCI结果的有效性。Scenario 2 will be explained in detail. As shown in Figure 4, there is no complete periodic transmission result within the sensing window. For complex channel conditions, the possibility of initial transmission failure of the opposite UE cannot be ruled out. In this scenario, in order to prevent excessive exclusion of the sensing window SCI causes unreliable resource exclusion results. Each time a SCI is received and indicated as a retransmission, based on the logical subframe offset between the initial transmission and the retransmission, it falls back to the corresponding time and frequency position and searches whether the same initial SCI exists. If the result does not exist, the current retransmitted SCI result needs to be retained to ensure the validity of the SCI result in the sensing window.
作为一种可选的实施方式，根据当前SCI的调度类型和传输类型获取第二LTE-V2X终端的资源预留信息，还包括：As an optional implementation manner, obtaining the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI also includes:
S11，在当前SCI的调度类型为周期型的情况下，确定当前SCI的传输类型；S11, when the scheduling type of the current SCI is periodic, determine the transmission type of the current SCI;
S12，在当前SCI的传输类型为初传的情况下，保存当前SCI的数据结构；S12, when the transmission type of the current SCI is initial transmission, save the data structure of the current SCI;
S13，确定当前SCI的资源占用位置与历史SCI的资源占用是否相同，得到资源预留信息。S13: Determine whether the resource occupation position of the current SCI is the same as the resource occupation of the historical SCI, and obtain resource reservation information.
根据当前解码SCI信息中的重传指示，确定当前的传输类型为初传或是重传和时频位置；According to the retransmission indication in the current decoded SCI information, determine whether the current transmission type is initial transmission or retransmission and time-frequency position;
在确定当前传输类型为初传，根据SCI信息中初传的起始子信道索引和占用的连续的子信道长度，基于当前的资源预留周期，转换成逻辑子帧偏移，往前偏移回查上一周期对应子信道位置上是否存在相同的PSSCH及PSCCH(或PSSCH)，若有，则说明当前周期的初传结果将往前偏移子帧的SCI结果清除，仅保留当前周期的初传子帧的SCI结果。After determining that the current transmission type is initial transmission, based on the starting subchannel index of initial transmission in the SCI information and the occupied continuous subchannel length, based on the current resource reservation period, it is converted into a logical subframe offset and shifted forward. Check back whether the same PSSCH and PSCCH (or PSSCH) exist at the corresponding sub-channel position in the previous cycle. If so, it means that the initial transmission result of the current cycle will be cleared by the SCI result of the forward offset subframe, and only the SCI result of the current cycle will be retained. The SCI result of the initial transmission subframe.
在确定当前传输类型为重传，执行与初传相同的回查判断，同时根据初传和重传的逻辑子帧偏移，往前偏移回查当前周期的初传位置是否有接收到对端在该位置的初传，如果有接收到对端在该位置的初传，将当前的重传SCI结果清除，仅保留当前周期的初传子帧的SCI结果。 After determining that the current transmission type is retransmission, perform the same lookback judgment as the initial transmission, and at the same time, based on the logical subframe offset of the initial transmission and retransmission, look back to see if there is a received pair at the initial transmission position of the current cycle. If the initial transmission of the peer end at this position is received, the current retransmission SCI result will be cleared, and only the SCI result of the initial transmission subframe of the current cycle will be retained.
作为一种可选的实施方式，确定当前SCI的资源占用位置与历史SCI的资源占用是否相同，包括：As an optional implementation, determining whether the resource occupation position of the current SCI is the same as the resource occupation of the historical SCI includes:
S13-1，根据当前SCI的资源预周期域和当前TDD子帧配比格式，计算上一周期子帧的时域位置；S13-1: Calculate the time domain position of the subframe in the previous cycle based on the current SCI resource pre-period domain and the current TDD subframe allocation format;
S13-2，定位感知窗中，位于上一周期子帧的时域位置上的SCI数据；S13-2, in the positioning sensing window, the SCI data located at the time domain position of the previous period subframe;
S13-3，遍历上一周期子帧的全部历史SCI，以判断历史SCI历史子帧的资源占用位置与当前SCI的资源占用位置是否相同。S13-3: Traverse all historical SCIs of the subframes of the previous period to determine whether the resource occupancy position of the historical SCI subframe is the same as the resource occupancy position of the current SCI.
作为一种可选的实施方式，在确定当前SCI的传输类型之后，还包括：As an optional implementation, after determining the transmission type of the current SCI, it also includes:
S21，在当前SCI的传输类型为重传的情况下，判断上一周期子帧中是否存在SCI指示相同频域位置的初传；S21, when the transmission type of the current SCI is retransmission, determine whether there is an initial transmission with the SCI indicating the same frequency domain position in the subframe of the previous period;
S22，在上一周期子帧中存在SCI指示相同频域位置的初传的情况下，判断上一周期子帧中是否存在相同频域位置的重传。S22: If there is an initial transmission with the SCI indicating the same frequency domain position in the subframe of the previous period, determine whether there is a retransmission of the same frequency domain position in the subframe of the previous period.
作为一种可选的实施方式，根据资源预留信息进行未来资源选择窗候选可用资源排除，包括：As an optional implementation, excluding candidate available resources for future resource selection windows based on resource reservation information includes:
S31，在资源预留信息指示历史SCI历史子帧的资源占用位置与当前SCI的资源占用位置相同的情况下，剔除感知窗中保存的历史SCI；S31, when the resource reservation information indicates that the resource occupation position of the historical subframe of the historical SCI is the same as the resource occupation position of the current SCI, remove the historical SCI saved in the sensing window;
S32，在资源预留信息指示存在相同频域位置的重传的情况下，剔除感知窗中保存的上一周期的重传SCI，且不保存当前重传SCI；S32, when the resource reservation information indicates that there is a retransmission at the same frequency domain position, remove the retransmission SCI of the previous cycle saved in the sensing window, and do not save the current retransmission SCI;
S33，在资源预留信息指示上一周期中不存在SCI指示相同频域位置的初传的情况下，保存当前重传SCI的数据结构。S33: If the resource reservation information indicates that there is no initial transmission with an SCI indicating the same frequency domain position in the previous cycle, save the data structure of the current retransmitted SCI.
作为一种可选的实施方式，根据资源预留信息进行未来资源选择窗候选可用资源排除，还包括：As an optional implementation, excluding candidate available resources for future resource selection windows based on resource reservation information also includes:
S41，在资源预留信息指示当前SCI的调度类型为事件型且传输类型为初传的情况下，保存当前SCI的数据结构；S41, when the resource reservation information indicates that the scheduling type of the current SCI is event type and the transmission type is initial transmission, save the data structure of the current SCI;
S42，在资源预留信息指示当前SCI的调度类型为事件型且传输类型为重传的情况下，不保存当前SCI的数据结构。S42: When the resource reservation information indicates that the scheduling type of the current SCI is event type and the transmission type is retransmission, the data structure of the current SCI is not saved.
针对Event型SCI，在每个下行可用子帧中根据当前解码SCI信息中的重传指示，确定当前的传输类型为初传还是重传。For Event-type SCI, in each downlink available subframe, it is determined whether the current transmission type is initial transmission or retransmission based on the retransmission indication in the current decoded SCI information.
在确定当前传输类型为初传时，存储当前初传的SCI信息；在确定当前传输类型为重传时，则不对当前重传的SCI信息作存储。When it is determined that the current transmission type is initial transmission, the SCI information of the current initial transmission is stored; when it is determined that the current transmission type is retransmission, the SCI information of the current retransmission is not stored.
基于上述先验的历史资源排除，对未来资源选择窗作侦听SCI作未来预约资源排除的条件可以分解为：Based on the above a priori historical resource exclusion, the conditions for listening SCI for future resource selection windows and excluding future reservation resources can be decomposed into:
(1)基于感知窗中末端T’/ms的Event型SCI感知结果，对解码Event型SCI的初传，进行对应其对重传资源预约到未来资源选择窗的资源排除；(1) Based on the Event-type SCI sensing result at the end T’/ms in the sensing window, for the initial transmission of the decoded Event-type SCI, perform resource exclusion corresponding to the retransmission resource reservation to the future resource selection window;
(2)基于感知窗中T/ms的SPS型SCI感知结果，对解码SPS型SCI的初传及重传，根据其周期特性，进行其对应周期在资源选择窗中的预约资源与候选可用资源重叠的可能性进行资源排除。(2) Based on the SPS type SCI sensing result of T/ms in the sensing window, for the initial transmission and retransmission of the decoded SPS type SCI, according to its periodic characteristics, the reserved resources and candidate available resources in the resource selection window for the corresponding period are performed Possibility of overlap for resource exclusion.
在LTE-V2X中，在没有蜂窝网络覆盖的场景下，终端支持自主进行发送资源选择的方式，在协议栈接收到来自空口的数据发送请求时，会立即将授权服务发送请求调度到物理层，物 理层接收到请求调度消息后，会即刻基于当前信道忙率(CBR)及调度优先级，进行如下确定发送资源流程：In LTE-V2X, in scenarios without cellular network coverage, the terminal supports independent transmission resource selection. When the protocol stack receives a data transmission request from the air interface, it will immediately schedule the authorized service transmission request to the physical layer. thing After receiving the scheduling request message, the management layer will immediately perform the following process to determine the sending resources based on the current channel busy rate (CBR) and scheduling priority:
1>发送参数选择、MCS确定；1>Send parameter selection and MCS confirmation;
2>对本地发送及同步周期全搜索的冲突子帧排除；2> Eliminate conflicting subframes for local transmission and synchronization cycle full search;
3>对历史感知窗中未侦听但本地发送的子帧按时域资源池特性排除；3> Exclude subframes that are not listened to but sent locally in the historical sensing window according to the characteristics of the time domain resource pool;
4>对历史感知窗中侦听SCI的占用子信道排除；4> Exclude occupied sub-channels for listening to SCI in the historical sensing window;
5>对未来资源选择窗中最多为初传及重传在剩余可用候选资源集合中随机选取时频发送资源。5> For the future resource selection window, time and frequency transmission resources are randomly selected from the remaining available candidate resource sets for initial transmission and retransmission.
由于侧行发送的高时效性需求，因此在终端在资源选取及分配过程中，需要更高效地定位到目标结果并且保证目标结果的可靠性。在LTE-V2X中，一个侧行数据TB(Transmission Block)最多传输2次，即初始传输和一次重传，而LTE-V2X支持的3种侧行物理信道中，PSCCH上承载的SCI码流，能够指示这两次传输的时频资源。终端支持自主选取发送资源，这是基于资源预留、资源感知、资源排除与资源选取的前提下实现的。具体地说，终端发送SCI预留时频资源，其它终端利用资源感知排除该UE预留的资源，通过选择未被排除的时频资源来避免和其它终端在传输期间的资源碰撞。Due to the high timeliness requirements of sidelink transmission, the terminal needs to locate the target results more efficiently and ensure the reliability of the target results during the resource selection and allocation process. In LTE-V2X, a sidelink data TB (Transmission Block) is transmitted up to 2 times, namely initial transmission and one retransmission. Among the three sidelink physical channels supported by LTE-V2X, the SCI code stream carried on the PSCCH, Can indicate the time and frequency resources of these two transmissions. The terminal supports autonomous selection of sending resources, which is based on resource reservation, resource awareness, resource exclusion and resource selection. Specifically, the terminal sends the SCI to reserve time-frequency resources, and other terminals use resource sensing to exclude the resources reserved by the UE, and avoid resource collisions with other terminals during transmission by selecting time-frequency resources that have not been excluded.
如果UE在感知窗内侦听到对端UE发送的SCI，UE将测量该SCI调度的PSSCH的策行链路参考信号接收功率(SL-RSRP)。若测量得到的SL-RSRP大于RSRP阈值，则UE将进一步判断该SCI中RIV、SFgap、Retransmission index和Resource reservation域指示的资源是否和资源选择窗中的候选可用资源在时频域重叠。如果重叠，则需要从资源候选集合中排除该候选可用资源。If the UE hears the SCI sent by the peer UE within the sensing window, the UE will measure the policy link reference signal received power (SL-RSRP) of the PSSCH scheduled by the SCI. If the measured SL-RSRP is greater than the RSRP threshold, the UE will further determine whether the resources indicated by the RIV, SFgap, Retransmission index and Resource reservation fields in the SCI overlap with the candidate available resources in the resource selection window in the time-frequency domain. If there is an overlap, the candidate available resource needs to be excluded from the resource candidate set.
在感知过程的每个下行可用子帧，UE会侦听当前使能资源池的SCI，在解码SCI码流数据后，获取对端的发送信息，不限于包括：重传指示、初重传的逻辑子帧间隔、RIV(指示初传和重传的子信道起始位置及占用的连续的子信道长度)、资源预留周期。In each downlink available subframe of the sensing process, the UE will listen to the SCI of the currently enabled resource pool, and after decoding the SCI code stream data, obtain the sending information of the peer end, which is not limited to including: retransmission indication, initial retransmission logical subframe Frame interval, RIV (indicates the starting position of the subchannel for initial transmission and retransmission and the occupied continuous subchannel length), and resource reservation period.
基于解码SCI的资源预留周期域，判断每个下行可用子帧上每个解码SCI的调度类型；通过不同类型SCI的调度特性，区分进行感知窗解码SCI结果的每子帧存储。同时在感知过程中，根据当前解码SCI的重传指示、初重传的逻辑子帧间隔、RIV(指示初传和重传的子信道起始位置及占用的连续的子信道长度)、资源预留周期等信息，通过不同类型SCI的传输特性，判断当前周期或上一周期是否存在相同的SCI传输结果，进而减少未来资源选择窗中对冗余SCI结果的资源排除。Based on the resource reservation period field of the decoding SCI, the scheduling type of each decoding SCI on each downlink available subframe is determined; through the scheduling characteristics of different types of SCI, the per-subframe storage of the perceptual window decoding SCI results is distinguished. At the same time, during the sensing process, based on the retransmission indication of the current decoded SCI, the logical subframe interval of the initial retransmission, RIV (indicating the starting position of the subchannel for initial transmission and retransmission and the occupied continuous subchannel length), resource reservation Cycle and other information, through the transmission characteristics of different types of SCI, determine whether the same SCI transmission result exists in the current cycle or the previous cycle, thereby reducing the resource exclusion of redundant SCI results in future resource selection windows.
根据上述办法，对于SPS型SCI，在感知窗中仅保留了最新一周期中初传的SCI信息；对于Event型SCI，在感知窗中仅保留了初传的SCI信息，同时指示了重传位置。不仅解决了冗余感知结果存储问题，减少了在资源选择子帧中对感知窗冗余SCI结果的资源排除次数，同时还考虑了SPS型SCI在周期性发送期间，对于当前信道条件不满足信道忙率不等式下会出现初传或重传丢失的情况，在感知窗中保留了所有有效的感知窗SCI结果，进而对资源选择窗的资源重叠判断提供了有效且精简的感知窗数据结果。According to the above method, for SPS type SCI, only the SCI information initially transmitted in the latest cycle is retained in the sensing window; for Event type SCI, only the initially transmitted SCI information is retained in the sensing window, and the retransmission position is indicated. . It not only solves the problem of storing redundant sensing results and reduces the number of resource exclusions for redundant SCI results in the sensing window in the resource selection subframe, but also considers that during the periodic transmission of SPS-type SCI, the current channel conditions do not meet the channel requirements. Under the busy rate inequality, initial transmission or retransmission loss may occur, and all valid sensing window SCI results are retained in the sensing window, thereby providing effective and streamlined sensing window data results for the resource overlap judgment of the resource selection window.
在资源选择子帧中，往前T/ms对历史感知窗的解码SCI数据进行未来资源选择窗的对端预留资源排除，从而保留可用的候选资源集合，提供给本地授权服务初传及重传的时频资源的随机选择。在每个下行可用子帧的感知过程中，提前进行解码SCI的分类存储及有效剔除，就能够在资源选择子帧到来时，迅速定位到对端唯一有效的SCI传输结果，并依据该对应信 息进行对未来资源选择窗中预留资源的资源排除。In the resource selection subframe, the decoded SCI data of the historical sensing window is excluded from the peer reserved resources of the future resource selection window T/ms forward, thereby retaining the available candidate resource set and providing it for the initial transmission and re-transmission of the local authorization service. Random selection of transmitted time and frequency resources. During the sensing process of each downlink available subframe, the decoded SCI is classified, stored and effectively eliminated in advance, so that when the resource selection subframe arrives, the only valid SCI transmission result of the peer end can be quickly located, and the corresponding information can be used based on the corresponding information. Use this information to exclude resources reserved in the future resource selection window.
具体地，在感知过程中的每个下行可用子帧中，解码SCI的预先排除流程不限于根据解码SCI的资源预留周期域，判断SCI的调度类型，并将调度类型划分：EVENT型SCI和SPS型SCI。Specifically, in each downlink available subframe during the sensing process, the pre-exclusion process of decoding SCI is not limited to judging the scheduling type of SCI based on the resource reservation period field of decoding SCI, and dividing the scheduling type into: EVENT type SCI and SPS type SCI.
在确定当前SCI为SPS型SCI时，如图5所示，判断对端的传输类型是初传还是重传，具体不限于为判断Restransmission Index是否为非0。非0则确定传输类型是初传，0则确定传输类型是重传。When it is determined that the current SCI is an SPS-type SCI, as shown in Figure 5, it is determined whether the transmission type of the opposite end is initial transmission or retransmission. The specific method is not limited to determining whether the Restransmission Index is non-0. If it is non-zero, it determines that the transmission type is initial transmission, and if it is 0, it determines that the transmission type is retransmission.
在判断当前SCI为初传时，Step1.1：SCI数据存储。When judging that the current SCI is the initial transmission, Step 1.1: SCI data storage.
Step1.2(初传)：根据Rsvp，以及当前TDD子帧配比，计算上一周期的初传逻辑子帧。根据SCI中的资源预留周期域信息，在36.214协议中，资源预留周期的取值范围为{0，20，50，100，200，300，...，1000}ms，单位为绝对子帧。根据当前TDD的子帧配比格式，对应36.213协议中TabIe 14.1.1-1的侧行链路传输步长，来计算出上一周期的逻辑子帧时域位置。Step1.2 (Initial transmission): Calculate the initial transmission logical subframe of the previous cycle based on Rsvp and the current TDD subframe ratio. According to the resource reservation period field information in SCI, in the 36.214 protocol, the value range of the resource reservation period is {0, 20, 50, 100, 200, 300,..., 1000}ms, and the unit is absolute sub frame. According to the current TDD subframe allocation format, corresponding to the sidelink transmission step size of TabIe 14.1.1-1 in the 36.213 protocol, the logical subframe time domain position of the previous cycle is calculated.
Step1.3(初传)：定位感知窗中该历史子帧位置的SCI数据，遍历历史子帧上的所有SCI数据(SCI Num＝c)。判断上一周期中是否存在相同频域位置的初传，频域位置可通过SCI信息中指示RIV值，通过36.213协议中的14.1.1.4C，转换出初传的起始子信道位置和占用的连续子信道大小来判断是否相同。如果存在相同频域位置的初传，则剔除感知窗中该对端上一周期的初传SCI信息。Step 1.3 (initial transmission): Locate the SCI data of the historical subframe position in the sensing window, and traverse all SCI data on the historical subframe (SCI Num = c). Determine whether there is an initial transmission with the same frequency domain position in the previous cycle. The frequency domain position can indicate the RIV value in the SCI information, and convert the initial transmission starting subchannel position and occupied contiguity through 14.1.1.4C in the 36.213 protocol. sub-channel size to determine whether they are the same. If there is an initial transmission with the same frequency domain position, the initial transmission SCI information of the peer in the previous cycle in the sensing window is eliminated.
Step1.4(初传)：当前SCI初传的SubCHStartld和LsubCH分别等于历史SCI初传的SubCHStartld和LsubCH？在判断为是，也就是当前SCI初传的SubCHStartld和LsubCH分别等于历史SCI初传的SubCHStartld和LsubCH的情况下，提出上一周期的历史初传SCI信息。在判断为否，也就是当前SCI初传的SubCHStartld和LsubCH并不等于历史SCI初传的SubCHStartld和LsubCH的情况下，再次执行Step1.3(初传)。Step1.4 (Initial transmission): Are the SubCHStartld and LsubCH of the current SCI initial transmission equal to the SubCHStartld and LsubCH of the historical SCI initial transmission respectively? If the judgment is yes, that is, when the SubCHStartld and LsubCH of the current SCI initial transmission are respectively equal to the SubCHStartld and LsubCH of the historical SCI initial transmission, the historical initial transmission SCI information of the previous cycle is proposed. If the judgment is negative, that is, if the SubCHStartld and LsubCH initially transmitted by the current SCI are not equal to the SubCHStartld and LsubCH initially transmitted by the historical SCI, execute Step 1.3 (initial transmission) again.
在判断当前SCI为重传时，根据SCI中的资源预留周期域信息回退并进行两层判断：判断上一周期中是否存在SCI中指示的初传频域位置的初传以及判断上一周期中是否存在相同频域位置的重传。具体的，Step2.1(初传)：根据SFgap，以及当前TDD子帧配比，计算当前周期的初传逻辑子帧。When determining that the current SCI is a retransmission, the resource reservation cycle domain information in the SCI is used to fall back and perform two levels of determination: determining whether there is an initial transmission at the initial transmission frequency domain position indicated in the SCI in the previous cycle and determining whether the previous transmission was Whether there are retransmissions at the same frequency domain position in the cycle. Specifically, Step 2.1 (initial transmission): Calculate the initial transmission logical subframe of the current cycle based on SFgap and the current TDD subframe ratio.
Step2.2(初传)：定位感知窗中该历史子帧位置的SCI数据。Step2.2 (initial transmission): Position the SCI data of the historical subframe position in the sensing window.
接下来与初传相似，执行Step1.4(初传)：当前SCI初传的SubCHStartld和LsubCH分别等于历史SCI初传的SubCHStartld和LsubCH？在判断为否的情况下，保存当前重传的SCI数据。The next step is similar to the initial transmission. Step 1.4 (initial transmission) is performed: Are the SubCHStartld and LsubCH of the current SCI initial transmission equal to the SubCHStartld and LsubCH of the historical SCI initial transmission respectively? If the judgment is negative, the currently retransmitted SCI data is saved.
在判断为是的情况下，依次执行Step1.2(初传)、Step1.3(初传)后，再次执行Step1.4(初传)：当前SCI初传的SubCHStartld和LsubCH分别等于历史SCI初传的SubCHStartld和LsubCH？在判断为否的情况下，再次执行Step1.3(初传)。If the judgment is yes, execute Step 1.2 (initial transmission) and Step 1.3 (initial transmission) in sequence, and then execute Step 1.4 (initial transmission) again: the SubCHStartld and LsubCH of the current SCI initial transmission are equal to the historical SCI initial transmission respectively. Passed SubCHStartld and LsubCH? If the judgment is negative, perform Step 1.3 (initial transmission) again.
在判断为是的情况下，剔除上一周期的初传SCI信息，且不保存当前重传的SCI数据。If the judgment is yes, the initially transmitted SCI information of the previous cycle is eliminated, and the current retransmitted SCI data is not saved.
在确定当前SCI为SPS型SCI时，如图6所示，判断对端的传输类型，类型有二：初传或者重传。具体不限于判断Restransmission Index是否为非0。非0则确定传输类型是初传，0则确定传输类型是重传。在确定为初传时，进行SCI数据存储，不限于为存储SCI对应的数据结构。在确定为重传时，则确定相对与资源选择窗而言为历史传输，不保存SCI对应的数据结构。 When it is determined that the current SCI is an SPS-type SCI, as shown in Figure 6, the peer's transmission type is determined. There are two types: initial transmission or retransmission. The specific method is not limited to determining whether the Restransmission Index is non-0. If it is non-zero, it determines that the transmission type is initial transmission, and if it is 0, it determines that the transmission type is retransmission. When it is determined to be the initial transmission, the SCI data is stored, which is not limited to storing the data structure corresponding to the SCI. When it is determined to be a retransmission, it is determined to be historical transmission relative to the resource selection window, and the data structure corresponding to the SCI is not saved.
本申请的有益效果主要体现在两个方面：第一方面，对历史感知窗数据结构，每下行可用子帧需要进行存储，根据SCI的调度类型区分了两类数据存储，极大地节省了内存占用空间。而对于每下行可用子帧而言，仅保留了对端最新周期中初传的SCI信息，同时指示了重传位置，不仅解决了冗余感知结果存储问题，减少了在资源选择子帧中对感知窗冗余SCI结果的资源排除次数，同时考虑到了SPS型SCI在周期性发送期间，对于当前信道条件不满足信道忙率不等式下，会出现某次初传或某次重传丢失的情况，在感知窗中保留了所有有效的感知窗SCI结果，进而对资源选择窗的资源重叠判断提供了有效且精简的感知窗数据结果。第二方面，对未来的资源选择窗，由于在感知过程中已经排除了周期性传输SCI的周期性重复，因此在资源选择子帧到来时，能够迅速定位到对端唯一有效的SCI传输结果，并依据该对应信息进行对未来资源选择窗中预留资源的资源排除。高效率地节约查找时间，从而最快地实现感知窗的侦听SCI排除，进而为本地侧行上行发送提供有效的候选可用资源集合，减小了资源选择紧张时序上的压力。The beneficial effects of this application are mainly reflected in two aspects: First, for the historical sensing window data structure, each downlink available subframe needs to be stored. Two types of data storage are distinguished according to the scheduling type of SCI, which greatly saves memory usage. space. For each downlink available subframe, only the SCI information initially transmitted in the latest cycle of the peer end is retained, and the retransmission position is indicated. This not only solves the problem of redundant sensing result storage, but also reduces the need for redundant sensing results in the resource selection subframe. The number of resource exclusions for the redundant SCI result of the sensing window also takes into account that during the periodic transmission of SPS-type SCI, if the current channel conditions do not meet the channel busy rate inequality, a certain initial transmission or a certain retransmission will be lost. All valid sensing window SCI results are retained in the sensing window, thereby providing effective and streamlined sensing window data results for resource overlap judgment in resource selection windows. Secondly, for future resource selection windows, since the periodic repetition of periodic transmission of SCI has been eliminated in the sensing process, when the resource selection subframe arrives, the only valid SCI transmission result of the opposite end can be quickly located. And based on the corresponding information, the resources reserved in the future resource selection window are excluded. Efficiently save search time, thereby realizing the fastest listening SCI elimination in the sensing window, thereby providing an effective set of candidate available resources for local sidelink uplink transmission, and reducing the pressure on resource selection and tight timing.
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如只读存储器/随机存取存储器(Read-Only Memory/Random Access Memory，ROM/RAM)、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本公开各个实施例所述的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is Better implementation. Based on this understanding, the technical solution of the present disclosure can be embodied in the form of a software product in nature or in part that contributes to the existing technology. The computer software product is stored in a storage medium (such as read-only memory/random access memory). The memory (Read-Only Memory/Random Access Memory, ROM/RAM), magnetic disk, optical disk) includes several instructions to cause a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the disclosure Methods described in various embodiments.
在本实施例中还提供了一种侦听侧行链路控制信息SCI的资源排除装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。This embodiment also provides a resource exclusion device for listening to sidelink control information SCI. This device is used to implement the above embodiments and preferred implementations. What has already been explained will not be described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
图7是根据本公开实施例的侦听侧行链路控制信息SCI的资源排除装置的结构框图，如图7所示，该装置包括：Figure 7 is a structural block diagram of a resource exclusion device for listening to sidelink control information SCI according to an embodiment of the present disclosure. As shown in Figure 7, the device includes:
解码模块72，设置为第一LTE-V2X终端在感知窗内侦听第二LTE-V2X终端发送的SCI，对于每个下行可用子帧，第一LTE-V2X终端解码当前侧行链路控制信息SCI；The decoding module 72 is configured so that the first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, and for each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control information. SCI;
获取模块74，设置为根据当前SCI的调度类型和传输类型获取第二LTE-V2X终端的资源预留信息；The acquisition module 74 is configured to obtain the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI;
排除模块76，设置为根据资源预留信息进行未来资源选择窗候选可用资源排除。The exclusion module 76 is configured to exclude candidate available resources for future resource selection windows based on the resource reservation information.
在一个实施例中，上述侦听侧行链路控制信息SCI的资源排除装置还包括第一判断模块，设置为在第一LTE-V2X终端解码侧行-2链路控制信息SCI之后，第一LTE-V2X终端基于解码当前SCI得到的资源预留周期域，判断第二LTE-V2X终端的当前SCI的调度类型，其中，调度类型包括周期型和事件型。In one embodiment, the above-mentioned resource exclusion device for listening to sidelink control information SCI also includes a first judgment module configured to: after the first LTE-V2X terminal decodes the sidelink-2 link control information SCI, the first The LTE-V2X terminal determines the scheduling type of the current SCI of the second LTE-V2X terminal based on the resource reservation period field obtained by decoding the current SCI, where the scheduling type includes periodic type and event type.
在一个实施例中，上述获取模块74还包括：在当前SCI的调度类型为周期型的情况下，确定当前SCI的传输类型；在当前SCI的传输类型为初传的情况下，保存当前SCI的数据结构；确定当前SCI的资源占用位置与历史SCI的资源占用是否相同，得到资源预留信息。In one embodiment, the above-mentioned acquisition module 74 also includes: when the scheduling type of the current SCI is periodic, determine the transmission type of the current SCI; when the transmission type of the current SCI is initial transmission, save the current SCI Data structure; determine whether the resource occupancy position of the current SCI is the same as the resource occupancy of the historical SCI, and obtain resource reservation information.
在一个实施例中，上述获取模块74中确定当前SCI的资源占用位置与历史SCI的资源占 用是否相同，包括：根据当前SCI的资源预周期域和当前TDD子帧配比格式，计算上一周期子帧的时域位置；定位感知窗中，位于上一周期子帧的时域位置上的SCI数据；遍历上一周期子帧的全部历史SCI，以判断历史SCI历史子帧的资源占用位置与当前SCI的资源占用位置是否相同。In one embodiment, the above-mentioned acquisition module 74 determines the resource occupation position of the current SCI and the resource occupation of the historical SCI. Whether the usage is the same, including: calculating the time domain position of the previous period subframe based on the current SCI resource pre-period domain and the current TDD subframe allocation format; in the positioning sensing window, it is located at the time domain position of the previous period subframe SCI data; traverse all historical SCI of the subframe of the previous period to determine whether the resource occupation position of the historical SCI historical subframe is the same as the resource occupation position of the current SCI.
在一个实施例中，上述侦听侧行链路控制信息SCI的资源排除装置还包括第一判断模块，设置为在确定当前SCI的传输类型之后，在当前SCI的传输类型为重传的情况下，判断上一周期子帧中是否存在SCI指示相同频域位置的初传；在上一周期子帧中存在SCI指示相同频域位置的初传的情况下，判断上一周期子帧中是否存在相同频域位置的重传。In one embodiment, the above-mentioned resource exclusion device for listening to sidelink control information SCI also includes a first judgment module configured to, after determining the transmission type of the current SCI, when the transmission type of the current SCI is retransmission , determine whether there is an initial transmission with SCI indicating the same frequency domain position in the subframe of the previous period; if there is an initial transmission with SCI indicating the same frequency domain position in the subframe of the previous period, determine whether there is an initial transmission in the subframe of the previous period Retransmission at the same frequency domain location.
在一个实施例中，上述排除模块76还包括：在资源预留信息指示历史SCI历史子帧的资源占用位置与当前SCI的资源占用位置相同的情况下，剔除感知窗中保存的历史SCI；在资源预留信息指示存在相同频域位置的重传的情况下，剔除感知窗中保存的上一周期的重传SCI，且不保存当前重传SCI；在资源预留信息指示上一周期中不存在SCI指示相同频域位置的初传的情况下，保存当前重传SCI的数据结构。In one embodiment, the above-mentioned elimination module 76 also includes: when the resource reservation information indicates that the resource occupation position of the historical subframe of the historical SCI is the same as the resource occupation position of the current SCI, eliminate the historical SCI saved in the sensing window; When the resource reservation information indicates that there is a retransmission at the same frequency domain position, the retransmission SCI of the previous cycle saved in the sensing window is eliminated, and the current retransmission SCI is not saved; when the resource reservation information indicates that there is no retransmission in the previous cycle. If there is an initial transmission with SCI indicating the same frequency domain position, the data structure of the current retransmission SCI is saved.
在一个实施例中，上述排除模块76还包括：在资源预留信息指示当前SCI的调度类型为事件型且传输类型为初传的情况下，保存当前SCI的数据结构；在资源预留信息指示当前SCI的调度类型为事件型且传输类型为重传的情况下，不保存当前SCI的数据结构。In one embodiment, the above exclusion module 76 also includes: saving the data structure of the current SCI when the resource reservation information indicates that the scheduling type of the current SCI is event type and the transmission type is initial transmission; When the scheduling type of the current SCI is event type and the transmission type is retransmission, the data structure of the current SCI is not saved.
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。It should be noted that each of the above modules can be implemented through software or hardware. For the latter, it can be implemented in the following ways, but is not limited to this: the above modules are all located in the same processor; or the above modules can be implemented in any combination. The forms are located in different processors.
为便于对本公开所提供的技术方案的理解，下面将结合具体场景的实施例进行详细的阐述。To facilitate understanding of the technical solutions provided by the present disclosure, detailed descriptions will be given below in conjunction with embodiments of specific scenarios.
本公开的实施例还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序，其中，该计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。Embodiments of the present disclosure also provide a computer-readable storage medium that stores a computer program, wherein the computer program is configured to execute the steps in any of the above method embodiments when running.
在一个示例性实施例中，上述计算机可读存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储计算机程序的介质。In an exemplary embodiment, the computer-readable storage medium may include but is not limited to: U disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM) , mobile hard disk, magnetic disk or optical disk and other media that can store computer programs.
本公开的实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。Embodiments of the present disclosure also provide an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.
在一个示例性实施例中，上述电子装置还可以包括传输设备以及输入输出设备，其中，该传输设备和上述处理器连接，该输入输出设备和上述处理器连接。In an exemplary embodiment, the above-mentioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the above-mentioned processor, and the input-output device is connected to the above-mentioned processor.
本实施例中的具体示例可以参考上述实施例及示例性实施方式中所描述的示例，本实施例在此不再赘述。For specific examples in this embodiment, reference may be made to the examples described in the above-mentioned embodiments and exemplary implementations, and details will not be described again in this embodiment.
显然，本领域的技术人员应该明白，上述的本公开实施例的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本公开不限制于任何特定的硬件和软件结合。Obviously, those skilled in the art should understand that each module or each step of the above-mentioned embodiments of the present disclosure can be implemented by a general computing device, and they can be concentrated on a single computing device, or distributed among multiple computing devices. over a network, they may be implemented with program code executable by a computing device, such that they may be stored in a storage device for execution by the computing device, and in some cases, may be executed in a sequence different from that described here. The steps shown or described may be implemented by fabricating them separately into individual integrated circuit modules, or by fabricating multiple modules or steps among them into a single integrated circuit module. As such, the present disclosure is not limited to any specific combination of hardware and software.
以上所述仅为本公开的优选实施例而已，并不用于限制本公开，对于本领域的技术人员 来说，本公开可以有各种更改和变化。凡在本公开的原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。 The above descriptions are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art This disclosure is subject to various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the principles of this disclosure shall be included in the protection scope of this disclosure.

Claims (10)

  1. 一种侦听侧行链路控制信息SCI的资源排除方法，包括：A resource exclusion method for listening to sidelink control information SCI, including:
    第一LTE-V2X终端在感知窗内侦听第二LTE-V2X终端发送的SCI，对于每个下行可用子帧，所述第一LTE-V2X终端解码当前侧行链路控制信息SCI；The first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, and for each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control information SCI;
    根据当前SCI的调度类型和传输类型获取所述第二LTE-V2X终端的资源预留信息；Obtain the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI;
    根据所述资源预留信息进行未来资源选择窗候选可用资源排除。Exclude available resources as candidates for future resource selection windows based on the resource reservation information.
  2. 根据权利要求1所述的方法，其中，在所述第一LTE-V2X终端解码侧行链路控制信息SCI之后，还包括：The method according to claim 1, wherein after the first LTE-V2X terminal decodes the sidelink control information SCI, it further includes:
    所述第一LTE-V2X终端基于解码所述当前SCI得到的资源预留周期域，判断所述第二LTE-V2X终端的所述当前SCI的所述调度类型，其中，所述调度类型包括周期型和事件型。The first LTE-V2X terminal determines the scheduling type of the current SCI of the second LTE-V2X terminal based on the resource reservation period field obtained by decoding the current SCI, where the scheduling type includes period type and event type.
  3. 根据权利要求2所述的方法，其中，根据所述当前SCI的调度类型和传输类型获取所述第二LTE-V2X终端的资源预留信息，还包括：The method according to claim 2, wherein obtaining the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI further includes:
    在所述当前SCI的调度类型为所述周期型的情况下，确定所述当前SCI的传输类型；When the scheduling type of the current SCI is the periodic type, determine the transmission type of the current SCI;
    在所述当前SCI的传输类型为初传的情况下，保存所述当前SCI的数据结构；When the transmission type of the current SCI is initial transmission, save the data structure of the current SCI;
    确定所述当前SCI的资源占用位置与历史SCI的资源占用是否相同，得到所述资源预留信息。Determine whether the resource occupation position of the current SCI is the same as the resource occupation of the historical SCI, and obtain the resource reservation information.
  4. 根据权利要求3所述的方法，其中，确定所述当前SCI的资源占用位置与历史SCI的资源占用是否相同，包括：The method according to claim 3, wherein determining whether the resource occupation position of the current SCI is the same as the resource occupation of the historical SCI includes:
    根据所述当前SCI的资源预周期域和当前TDD子帧配比格式，计算上一周期子帧的时域位置；Calculate the time domain position of the previous period subframe according to the resource pre-period domain of the current SCI and the current TDD subframe allocation format;
    定位所述感知窗中，位于所述上一周期子帧的时域位置上的SCI数据；Locate the SCI data located in the time domain position of the previous periodic subframe in the sensing window;
    遍历所述上一周期子帧的全部历史SCI，以判断所述历史SCI的资源占用位置与所述当前SCI的资源占用位置是否相同。All historical SCIs of the subframes of the previous period are traversed to determine whether the resource occupation position of the historical SCI is the same as the resource occupation position of the current SCI.
  5. 根据权利要求4所述的方法，其中，在确定所述当前SCI的传输类型之后，还包括：The method according to claim 4, wherein, after determining the transmission type of the current SCI, further comprising:
    在所述当前SCI的传输类型为重传的情况下，判断上一周期子帧中是否存在SCI指示相同频域位置的初传；When the transmission type of the current SCI is retransmission, determine whether there is an initial transmission with the SCI indicating the same frequency domain position in the subframe of the previous period;
    在所述上一周期子帧中存在SCI指示相同频域位置的初传的情况下，判断所述上一周期子帧中是否存在相同频域位置的重传。If there is an initial transmission with the SCI indicating the same frequency domain position in the subframe of the previous period, it is determined whether there is a retransmission of the same frequency domain position in the subframe of the previous period.
  6. 根据权利要求3所述的方法，其中，根据所述资源预留信息进行未来资源选择窗候选可用资源排除，包括：The method according to claim 3, wherein the exclusion of future resource selection window candidate available resources according to the resource reservation information includes:
    在所述资源预留信息指示所述历史SCI的资源占用位置与所述当前SCI的资源占用位置相同的情况下，剔除感知窗中保存的所述历史SCI； When the resource reservation information indicates that the resource occupation position of the historical SCI is the same as the resource occupation position of the current SCI, eliminate the historical SCI saved in the sensing window;
    在所述资源预留信息指示存在相同频域位置的重传的情况下，剔除所述感知窗中保存的上一周期的重传SCI，且不保存当前重传SCI；In the case where the resource reservation information indicates that there is a retransmission at the same frequency domain position, remove the retransmission SCI of the previous period saved in the sensing window, and do not save the current retransmission SCI;
    在所述资源预留信息指示所述上一周期中不存在SCI指示相同频域位置的初传的情况下，保存当前重传SCI的数据结构。When the resource reservation information indicates that there is no initial transmission in which the SCI indicates the same frequency domain position in the previous cycle, the data structure of the current retransmitted SCI is saved.
  7. 根据权利要求2所述的方法，其中，根据所述资源预留信息进行未来资源选择窗候选可用资源排除，还包括：The method according to claim 2, wherein the exclusion of future resource selection window candidate available resources according to the resource reservation information further includes:
    在所述资源预留信息指示所述当前SCI的调度类型为所述事件型且传输类型为初传的情况下，保存所述当前SCI的数据结构；When the resource reservation information indicates that the scheduling type of the current SCI is the event type and the transmission type is initial transmission, save the data structure of the current SCI;
    在所述资源预留信息指示所述当前SCI的调度类型为所述事件型且传输类型为重传的情况下，不保存所述当前SCI的数据结构。When the resource reservation information indicates that the scheduling type of the current SCI is the event type and the transmission type is retransmission, the data structure of the current SCI is not saved.
  8. 一种侦听侧行链路控制信息SCI的资源排除装置，包括：A resource exclusion device for listening to sidelink control information SCI, including:
    解码模块，设置为第一LTE-V2X终端在感知窗内侦听第二LTE-V2X终端发送的SCI，对于每个下行可用子帧，所述第一LTE-V2X终端解码当前侧行链路控制信息SCI；A decoding module configured so that the first LTE-V2X terminal listens to the SCI sent by the second LTE-V2X terminal within the sensing window, and for each downlink available subframe, the first LTE-V2X terminal decodes the current sidelink control Information SCI;
    获取模块，设置为根据当前SCI的调度类型和传输类型获取所述第二LTE-V2X终端的资源预留信息；An acquisition module configured to acquire the resource reservation information of the second LTE-V2X terminal according to the scheduling type and transmission type of the current SCI;
    排除模块，设置为根据所述资源预留信息进行未来资源选择窗候选可用资源排除。An exclusion module is configured to exclude candidate available resources for future resource selection windows based on the resource reservation information.
  9. 一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机程序，其中，所述计算机程序被处理器执行时实现所述权利要求1至7任一项中所述的方法的步骤。A computer-readable storage medium having a computer program stored in the computer-readable storage medium, wherein when the computer program is executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented. .
  10. 一种电子装置，包括存储器、处理器以及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现所述权利要求1至7任一项中所述的方法的步骤。 An electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, any one of claims 1 to 7 is implemented. The steps of the method described in the item.
PCT/CN2023/102893 2022-06-30 2023-06-27 Resource exclusion method and apparatus for monitoring sidelink control information (sci) WO2024002100A1 (en)

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