WO2022082670A1 - 边链路资源选择方法以及装置 - Google Patents

边链路资源选择方法以及装置 Download PDF

Info

Publication number
WO2022082670A1
WO2022082670A1 PCT/CN2020/122997 CN2020122997W WO2022082670A1 WO 2022082670 A1 WO2022082670 A1 WO 2022082670A1 CN 2020122997 W CN2020122997 W CN 2020122997W WO 2022082670 A1 WO2022082670 A1 WO 2022082670A1
Authority
WO
WIPO (PCT)
Prior art keywords
time
period
time period
unit
listening
Prior art date
Application number
PCT/CN2020/122997
Other languages
English (en)
French (fr)
Inventor
张健
纪鹏宇
王昕�
蒋琴艳
陈哲
张磊
Original Assignee
富士通株式会社
张健
纪鹏宇
王昕�
蒋琴艳
陈哲
张磊
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社, 张健, 纪鹏宇, 王昕�, 蒋琴艳, 陈哲, 张磊 filed Critical 富士通株式会社
Priority to JP2023523657A priority Critical patent/JP2023545848A/ja
Priority to EP20958252.7A priority patent/EP4236516A4/en
Priority to PCT/CN2020/122997 priority patent/WO2022082670A1/zh
Priority to CN202080105702.XA priority patent/CN116326009A/zh
Publication of WO2022082670A1 publication Critical patent/WO2022082670A1/zh
Priority to US18/134,622 priority patent/US20230262661A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • 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
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the embodiments of the present application relate to the field of communication technologies.
  • V2X Vehicle to Everything
  • P2X Pedestrian to Everything
  • V2X the sending device can communicate directly with the receiving device through a sidelink.
  • LTE Long Term Evolution
  • NR New Radio
  • V2X communication namely LTE V2X and NR V2X.
  • the side link control information (SCI, Sidelink Control Information) is carried by the Physical Sidelink Control Channel (PSCCH, Physical Sidelink Control Channel), and the side link data information is carried by the Physical Sidelink Shared Channel (PSSCH, Physical Sidelink Control Channel). Sidelink Shared Channel), and the sidelink feedback information (ACK/NACK) is carried by the Physical Sidelink Feedback Channel (PSFCH, Physical Sidelink Feedback Channel).
  • LTE V2X defines PSCCH and PSSCH.
  • NR V2X defines PSCCH, PSSCH and PSFCH.
  • the transmitting device in the side link can autonomously select time-frequency resources for information transmission based on the sensing results.
  • perception includes monitoring (monitor) SCI, measuring Reference Signal Received Power (RSRP, Reference Signal Received Power) and measuring Received Signal Strength Indicator (RSSI, Received Signal Strength Indicator) and so on.
  • SCI Monitoring (monitor) SCI, measuring Reference Signal Received Power (RSRP, Reference Signal Received Power) and measuring Received Signal Strength Indicator (RSSI, Received Signal Strength Indicator) and so on.
  • RSSI Received Signal Strength Indicator
  • full sensing For autonomous resource selection, the following schemes are currently included: full sensing, partial sensing, and random selection.
  • full sensing the device senses in each subframe or time slot, which can effectively avoid interference, but continuous sensing means continuous power consumption, although this is not a problem for vehicle equipment in V2X, but for pedestrians in P2X Equipment, equipment power consumption is also an important factor to consider.
  • partial sensing the device does not need to sense in every subframe or time slot, but only needs to sense in part of the subframe or time slot, which is beneficial to reduce the power consumption of the device (power reduction).
  • the transmission equipment of pedestrians in P2X can greatly save power.
  • random selection the device can be completely silent.
  • NR V2X supports short-cycle services with more types of cycles (services with a cycle of less than 100 milliseconds). More specifically, for LTE V2X, the periods of short-period services can only be 20 milliseconds (ms) and 50 milliseconds; for NR V2X, the periods of short-period services can be 1 millisecond to 99 milliseconds.
  • NR V2X currently does not support partial sensing, and traditional LTE V2X partial sensing cannot avoid the resources reserved by NR V2X short-cycle services, so collisions and the resulting interference cannot be avoided, thus affecting the reliability of V2X transmission. For example, the personal safety of pedestrians in P2X cannot be guaranteed.
  • embodiments of the present application provide a method and apparatus for selecting a side link resource.
  • a method for selecting side link resources including:
  • the terminal device determines the first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period;
  • Resource exclusion is performed on candidate resources within the selected time period according to the received side link control information.
  • an apparatus for selecting side link resources including:
  • a determining part which determines the first listening time period at least according to the service period, the last time unit of the sensing time period and the last time unit of the selection time period;
  • An exclusion unit which performs resource exclusion for candidate resources within the selected time period according to the received side link control information.
  • a communication system including:
  • a terminal device which determines a first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period; monitors the side link control information within the first listening time period; and Resource exclusion is performed on candidate resources within the selected time period according to the received side link control information.
  • the terminal device determines the first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period; Inner monitor (monitor) side link control information.
  • the terminal device determines the first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period; Inner monitor (monitor) side link control information.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is an exemplary diagram of perception in an embodiment of the present application
  • FIG. 3 is a schematic diagram of a resource selection method according to an embodiment of the present application.
  • FIG. 4 is an exemplary diagram of determining a first listening time period according to an embodiment of the present application.
  • FIG. 5 is an exemplary diagram of a first listening time period in an embodiment of the present application.
  • Fig. 6 is another example diagram of the first listening time period of the embodiment of the present application.
  • Fig. 7 is another example diagram of the first listening time period of the embodiment of the present application.
  • FIG. 8 is another example diagram of a first listening time period in an embodiment of the present application.
  • Fig. 9 is another example diagram of the first listening time period of the embodiment of the present application.
  • FIG. 10 is another example diagram of the first listening time period in the embodiment of the present application.
  • FIG. 11 is another example diagram of the first listening time period in the embodiment of the present application.
  • FIG. 12 is an exemplary diagram of a listening time period in an embodiment of the present application.
  • FIG. 13 is another example diagram of a listening time window according to an embodiment of the present application.
  • FIG. 14 is another example diagram of a listening time window in an embodiment of the present application.
  • 15 is a schematic diagram of a side link resource selection apparatus according to an embodiment of the present application.
  • 16 is a schematic diagram of a network device according to an embodiment of the present application.
  • FIG. 17 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terms “first”, “second”, etc. are used to distinguish different elements in terms of numelation, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be referred to by these terms restricted.
  • the term “and/or” includes any and all combinations of one or more of the associated listed items.
  • the terms “comprising”, “including”, “having”, etc. refer to the presence of stated features, elements, elements or components, but do not preclude the presence or addition of one or more other features, elements, elements or components.
  • the term "communication network” or “wireless communication network” may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE, Long Term Evolution), Long Term Evolution Enhanced (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access) and so on.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Enhanced
  • WCDMA Wideband Code Division Multiple Access
  • High-Speed Packet Access High-Speed Packet Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to communication protocols at any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G , New Radio (NR, New Radio), etc., and/or other communication protocols currently known or to be developed in the future.
  • Network device refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device.
  • Network devices may include but are not limited to the following devices: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobility management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller) and so on.
  • the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and may also include a remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low power node (eg femeto, pico, etc.).
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low power node eg femeto, pico, etc.
  • base station may include some or all of their functions, each base station may provide communication coverage for a particular geographic area.
  • the term "cell” may refer to a base station and/or its coverage area, depending on the context in which the term is used.
  • the term "User Equipment” (UE, User Equipment) or “Terminal Equipment” (TE, Terminal Equipment or Terminal Device), for example, refers to a device that accesses a communication network through a network device and receives network services.
  • a terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.
  • the terminal device may include but is not limited to the following devices: Cellular Phone (Cellular Phone), Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication device, handheld device, machine type communication device, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.
  • Cellular Phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem wireless communication device
  • handheld device machine type communication device
  • laptop computer Cordless phones, smartphones, smart watches, digital cameras, and more.
  • the terminal device may also be a machine or device that performs monitoring or measurement, such as but not limited to: Machine Type Communication (MTC, Machine Type Communication) terminals, In-vehicle communication terminals, device-to-device (D2D, Device to Device) terminals, machine-to-machine (M2M, Machine to Machine) terminals, etc.
  • MTC Machine Type Communication
  • D2D Device to Device
  • M2M Machine to Machine
  • network side refers to one side of the network, which may be a certain base station, and may also include one or more network devices as described above.
  • user side or “terminal side” or “terminal device side” refers to the side of a user or terminal, which may be a certain UE, or may include one or more terminal devices as above.
  • equipment may refer to network equipment or terminal equipment.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates the case of a terminal device and a network device as an example.
  • a communication system 100 may include a network device 101 and terminal devices 102 and 103 .
  • FIG. 1 only takes two terminal devices and one network device as an example for description, but the embodiment of the present application is not limited to this.
  • Enhanced Mobile Broadband eMBB, enhanced Mobile Broadband
  • Massive Machine Type Communication mMTC, massive Machine Type Communication
  • Ultra-Reliable and Low Latency Communication URLLC, Ultra-Reliable and Low.
  • -Latency Communication etc.
  • FIG. 1 shows that both terminal devices 102 and 103 are within the coverage of the network device 101, but the present application is not limited to this. Both terminal devices 102 , 103 may not be within the coverage of the network device 101 , or one terminal device 102 may be within the coverage of the network device 101 and the other end device 103 may be outside the coverage of the network device 101 .
  • side link transmission may be performed between the two terminal devices 102 and 103 .
  • the two terminal devices 102 and 103 can both perform side link transmission within the coverage of the network device 101 to implement V2X communication, or both can perform side link transmission outside the coverage of the network device 101 to implement V2X
  • one terminal device 102 is within the coverage of the network device 101 and another terminal device 103 is outside the coverage of the network device 101 to perform side link transmission to implement V2X communication.
  • terminal equipment can obtain side link transmission resources through the process of sensing detection + resource selection, in which sensing can be continuously performed to obtain the occupancy of resources in the resource pool. For example, the terminal device can estimate the resource occupancy in a later period of time (called a selection window or a selection period) according to the resource occupancy in a previous period of time (called a sensing window or a sensing period).
  • LTE V2X partial sensing can refer to the content in Section 14.1.1.6 in 3GPP TS 36.213 V15.2.0, and the main steps of LTE V2X partial sensing can be described in Table 1 below:
  • the terminal device selects and transmits resources based on its own sensing result, which can avoid interference or collision between devices to a certain extent.
  • the steps for resource selection can be found in subsection 8.1.4 of the standard TS 38.214 V16.2.0.
  • NR V2X does not currently support partial perception.
  • NR V2X supports short-cycle services with more cycles. More specifically, for LTE V2X, the periods of short-period services can only be 20 milliseconds and 50 milliseconds; for NR V2X, the periods of short-period services can be 1 millisecond to 99 milliseconds.
  • NR V2X currently does not support partial sensing, and traditional LTE V2X partial sensing cannot avoid the resources reserved by NR V2X short-cycle services, so collisions and the resulting interference cannot be avoided, thus affecting the reliability of V2X transmission. For example, the personal safety of pedestrians in P2X cannot be guaranteed.
  • FIG. 2 is an example diagram of perception in an embodiment of the present application.
  • the device will avoid the short-cycle service during resource selection. Satisfying the above conditions is actually equivalent to that only when the SCI of the short-period service is received (or monitored) within the monitoring window, the device will avoid the short-period service during resource selection.
  • the time length of the listening window is less than or equal to the short-cycle service period.
  • the monitoring window determined according to the above conditions is shown in Figure 2.
  • Logical subframes refer to subframes within a resource pool. For logical subframe x, its corresponding physical subframe is denoted as
  • the monitoring window determined by the device is shown in the upper part of Figure 2, and the monitoring window is 15 milliseconds.
  • the resource m of the 20-millisecond short-period service can be monitored in the listening window of 15 milliseconds (as shown in 201). Avoid periodic traffic with a period of 20 milliseconds.
  • the monitoring window determined by the device is shown in the lower part of Figure 2, and the monitoring window is 15 milliseconds.
  • the period of the short-period service is 80 milliseconds
  • the resources of the 80-millisecond short-period service (none of m, m1, and m2 are not dropped) cannot be monitored in the listening window of 15 milliseconds (as shown in 202). into this time period), so it is impossible to avoid short-period services with a period of 80 milliseconds. Therefore, LTE V2X partial sensing cannot avoid short-cycle services other than 20 ms and 50 ms.
  • the embodiments of the present application will be described below with respect to these problems.
  • the side link is described by taking V2X as an example, but the present application is not limited to this, and can also be applied to a side link transmission scenario other than V2X.
  • the terms “side link” and “V2X” are interchangeable, the terms “PSFCH” and “side link feedback channel” are interchangeable, and the terms “PSCCH” and “ “Sidelink Control Channel” or “Sidelink Control Information” are interchangeable, as are the terms “PSSCH” and “Sidelink Data Channel” or “Sidelink Data”.
  • transmitting or receiving PSCCH can be understood as sending or receiving side link control information carried by PSCCH; sending or receiving PSSCH can be understood as sending or receiving side link data carried by PSSCH; sending or receiving PSFCH can be understood as sending or receiving side link feedback information carried by PSFCH.
  • Sidelink transmission also called sidelink transmission
  • PSCCH/PSSCH transmission or sidelink data/information transmission can be understood as PSCCH/PSSCH transmission or sidelink data/information transmission.
  • An embodiment of the present application provides a method for selecting a side link resource, which is described from a terminal device.
  • the terminal device can send side link data to other terminal devices, so the terminal device needs to perform resource selection/reselection to determine the transmission resource of the side link data.
  • the terminal device in this embodiment of the present application is a sending device, and other terminal devices are receiving devices.
  • FIG. 3 is a schematic diagram of a resource selection method according to an embodiment of the present application. As shown in FIG. 3 , the method includes:
  • the terminal device determines a first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period;
  • the terminal device monitors (monitors) side link control information within the first monitoring time period; and 303, the terminal device monitors the side link control information within the selected time period according to the received side link control information.
  • Candidate resources are subject to resource exclusion.
  • FIG. 3 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto.
  • the execution order of the various operations can be adjusted appropriately, and other operations can be added or some of the operations can be reduced.
  • Those skilled in the art can make appropriate modifications according to the above content, and are not limited to the description of the above-mentioned FIG. 3 .
  • the terminal device may perform side link resource selection or reselection, which is called (re-)selection, including resource exclusion.
  • the resource reselection may be triggered by the result of resource re-evaluation or preemption detection performed by the terminal device, and "resource selection or reselection" may also be referred to as “resource selection/resource reselection/resource re-evaluation/preemption detection”.
  • resource selection/resource reselection/resource re-evaluation/preemption detection For the specific content of resource selection/resource reselection/resource re-evaluation/preemption detection, and resource exclusion, you can refer to related technologies, and will not be repeated here.
  • the service period is a period of a service that the terminal device wants to avoid, and the service period is less than 100 milliseconds.
  • the time unit in the embodiment of the present application represents a logical time unit, that is, a time unit belonging to the side link resource pool.
  • a time unit may be a subframe, a slot, or a symbol.
  • T milliseconds can be converted into P T time units, also referred to as P T corresponding to T milliseconds.
  • P T corresponding to T milliseconds For physical time units Its corresponding logical time unit (time unit) can be expressed as x or or other forms. For ease of description, the embodiments of the present application use x to represent the physical time unit the corresponding time unit.
  • the terminal device determines a reference time period, the last time unit of the reference time period is the last time unit of the sensing time period, and the time length of the reference time period is equal to the service period; according to In the service cycle, the selected time period is periodically repeated one or more times in the reverse time direction to obtain one or more periodic time periods; and the reference time period and the one or more periodic time periods are at least The partially overlapping time period is determined as the first listening time period.
  • FIG. 4 is an example diagram of determining a first listening time period according to an embodiment of the present application.
  • the device selects resources within the resource selection time period; if the device wants to avoid periodic services with a period of P during resource selection, the device needs to monitor the SCI within the first monitoring time period determined in the embodiment of the present application. Otherwise, there will be some periodic services whose period is P that may be unavoidable by the equipment.
  • the periodic service with a period of P is a periodic service with a period of less than 100 milliseconds, denoted as P ⁇ P 100 , where 100 milliseconds is converted into a logical time unit The latter is P 100 , that is, P 100 represents the number of time units included in 100 milliseconds.
  • the last time unit that the device can monitor is denoted as x'
  • the reference time period includes time units x'-P+1, x'-P+2,...,x'-1,x'.
  • the last time unit of the reference time period is x', and the time length of the reference time period is equal to P.
  • the resource selection time period includes a time unit in which the device can perform resource selection.
  • the resource selection time period includes Y time units.
  • the last time unit of the resource selection time period is denoted as y', and y' is the last time unit in which the device can perform resource selection.
  • the time interval between the time unit of the last monitoring and the time unit of the last resource selection is recorded as y'-x'.
  • the resource selection time period may be periodically repeated along the reverse time axis direction with P as the period, so as to obtain multiple periodic time periods 401 and 402 .
  • the plurality of periodic time periods include at least two duplicate copies of the resource selection time period after periodic repetition.
  • the intersection of the multiple periodic time periods and the reference time period is the first listening time period (including the two time periods shown in (1) and (2) in FIG. 4 ). As long as the device monitors the time unit included in the first monitoring time period, it can avoid periodic services whose period is P.
  • the terminal device determines a reference time period, the last time unit of the reference time period is the last time unit of the sensing time period, and the time length of the reference time period is equal to the service period; according to In the service cycle, the selected time period is periodically repeated one or more times in the reverse time direction, so as to obtain a last cycle time period that at least partially overlaps with the reference time period; The last time unit of the reference time period is divided into a first time period and a second time period; and the second time period is shifted in the reverse time direction by the time length of the service cycle, and the first time period is offset. The time period and the offset second time period are determined as the first listening time period.
  • the resource selection time period may be periodically repeated along the reverse time axis direction with P as the period, so as to obtain multiple periodic time periods 401 and 402 .
  • the last periodic time period 401 that at least partially overlaps with the reference time period can be obtained; the last time unit along the reference time period in the last periodic time period is divided into the first time period (2) and the first time period (2) and the first time period (2).
  • the subsequent second time period (1) is determined as the first listening time period. As long as the device monitors the time unit included in the first monitoring time period, it can avoid periodic services whose period is P.
  • the first listening time period includes time unit x;
  • the first listening time period includes time unit x;
  • x x′-mod(A,P)
  • mod() represents the modulo operation
  • x' represents the last time unit of the sensing period
  • P represents the service period
  • y' represents the last time unit of the selection period
  • y represents the selection period time unit in .
  • the first listening time period includes time unit x;
  • x x′-P+mod(B,P)
  • mod() represents the modulo operation
  • x' represents the last time unit of the sensing period
  • P represents the service period
  • y' represents the last time unit of the selection period
  • y represents the selection period time unit in .
  • the service period is less than the time interval between the last time unit of the sensing time period and the last time unit of the selection time period. That is, P ⁇ y'-x'.
  • the time length of the first listening time period is less than or equal to the service period.
  • the time length of the selected time period is less than the service period.
  • FIG. 5 is an example diagram of a first listening time period in an embodiment of the present application, which schematically illustrates the meanings of the above expressions and related variables; wherein, Y ⁇ P.
  • FIG. 6 is another example diagram of the first listening time period in the embodiment of the present application, which schematically illustrates the meanings of the above expressions and related variables; wherein, Y>P.
  • x' is the time unit for monitoring 100-millisecond periodic services; alternatively, x' is the time unit for monitoring aperiodic services; or x' is the last time unit that can be monitored determined by the processing capability of the device.
  • the last time unit of the sensing time period is: time unit y'-P 100 , where y' represents the last time unit of the selected time period, and P 100 represents the time unit included in 100 milliseconds number.
  • the last time unit of the perceived time period is: temporally located in a physical time unit The last time unit before, where n represents the physical time unit that the higher layer triggers resource selection, Indicates the processing time, in physical time units.
  • the last time unit of the perceived time period is: temporally located in a physical time unit the last time unit before, where z' represents the first time unit of the selected time period, Represents the first physical time unit of the selected time period, and T represents the processing time, in physical time units.
  • the time unit is a time slot
  • the values in the standard TS 38.214 can be used, for example, as shown in Table 2 and Table 3.
  • FIG. 8 is another example diagram of the first listening time period in the embodiment of the present application, in which the time unit is replaced by a time slot for description.
  • FIG. 9 is another example diagram of the first listening time period in the embodiment of the present application.
  • the value of Y in FIG. 9 is smaller.
  • the listening time period determined in the embodiment of the present application may actually be regarded as Y time slots that are cyclically shifted in the reference time period.
  • the displacement amount of the cyclic shift is zero, which is a special case of cyclic shift.
  • FIG. 10 is another example diagram of the first monitoring period of time in the embodiment of the present application
  • FIG. 11 is another example diagram of the first monitoring period of time in the embodiment of the present application.
  • Figures 8 and 9 value becomes larger. More specifically, in Figures 8 and 9 In Figure 10 and Figure 11 It can be seen from this that the embodiments of the present application may be applicable to different parameter configuration situations.
  • the terminal device further monitors the side link control information in the union formed by the second listening time period and the first listening time period; wherein, the last time unit of the second listening time period is the The last time unit of the sensing time period, the time length of the second listening time period is equal to the time length of the service period or the selection time period.
  • FIG. 12 is an example diagram of the listening time period of the embodiment of the present application.
  • the listening time period of the device includes the combination of the first listening time period determined using the embodiment of the present application and the second listening time period determined using the LTE V2X sensing. set.
  • the time periods (1) and (2) are the first listening time periods determined according to the embodiments of the present application; the time period (3) is the second listening time period determined according to, for example, LTE V2X partial sensing, wherein , the last time unit of time period (3) is x'.
  • the listening period is the union of periods (1), (2) and (3).
  • the first listening time period is schematically described above, and the resource selection or resource exclusion of the device is described below.
  • the terminal device receives first sidelink control information indicating that the service period is P rsvp_RX at time unit m, and the reference signal received power (RSRP) obtained based on the first sidelink control information is high
  • the terminal device excludes the following candidate resources:
  • the time-frequency resource and the candidate resource determined based on the first sidelink control information or based on the second sidelink control information that can be received in the time unit m+q ⁇ P rsvp_RX overlapping,
  • each periodic service will correspond to a listening time period.
  • the device monitors the union of all listening time periods.
  • a certain time unit that the terminal device needs to monitor may be determined to monitor a certain periodic service, but there is no restriction on the terminal device to monitor only the periodic service in this time unit, and the terminal device monitors the SCI indiscriminately. For example, even if a certain time unit is determined for monitoring the P1 periodic service, the P2 periodic service may also be received in this time unit.
  • the listening time period determined by the terminal device to monitor the P-period service is referred to as the listening period of the P-period service for short.
  • the device may need to monitor and avoid multiple periodic services. For different periodic services, selecting the same time unit as the last time unit that the device can monitor is beneficial to reduce the total number of time units that the device needs to monitor, thereby saving power. This is because the monitoring time periods for different periodic services determined based on the same last time unit may overlap, and the resource reservation of multiple periodic services can be obtained by monitoring the intersection, which actually reduces the time the device needs to monitor. The number of units is beneficial to reduce power consumption.
  • the listening time period of the 100-millisecond period service can be determined according to the partial perception of LTE V2X, and the last time unit of the listening period is marked as x'. Take x' as the last time unit that the device can monitor to determine the monitor time period of other periodic services whose period is less than 100 milliseconds.
  • the terminal device determines the first monitoring time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period; Side link control information. In this way, resource collision with short-cycle services can be effectively avoided, thereby improving the reliability of V2X, for example, ensuring the personal safety of pedestrians in P2X.
  • An embodiment of the present application provides a method for selecting a side link resource, which is described from a terminal device, and the same content as that of the embodiment of the first aspect will not be repeated.
  • the embodiments of the second aspect may be executed in combination with the embodiments of the first aspect, or may be executed independently.
  • the determination of the listening time period is also based on the magnitude relationship between P and y'-x'.
  • the service period is greater than or equal to the time interval between the last time unit of the sensing time period and the last time unit of the selection time period.
  • P ⁇ y'-x' use the embodiment of the first aspect to determine the listening time period; if P ⁇ y'-x', determine the listening time period according to the following method: For the resource selection time unit y in the time period , the device needs to monitor the time unit y-P.
  • the device needs to listen to the time unit x'-mod(A,P), where If P ⁇ y'-x', for time unit y in the resource selection period, the device needs to listen to time unit yP.
  • the device listens for 100 millisecond periodic traffic, and the device also listens for aperiodic traffic.
  • the last time unit that the device can monitor is the time unit determined by the device to monitor the aperiodic service, in other words, the device determines the last time unit based on monitoring the aperiodic service.
  • the device determines the listening time period for monitoring the P-periodic service based on the last time unit of listening for the aperiodic service, instead of determining the listening time for monitoring the P-periodic service based on the last time unit for monitoring the 100-millisecond periodic service part.
  • the last time unit x' determined by the device based on monitoring aperiodic traffic may satisfy y'-x' ⁇ P 100 . Since y'-x' ⁇ P 100 , there may be P such that y'-x' ⁇ P ⁇ P 100 . If P ⁇ y'-x', the device should not actually process P-period services as short-period services, otherwise there may still be P-period services that cannot be avoided.
  • FIG. 13 is another example diagram of the listening time window according to the embodiment of the present application. As shown in FIG. 13 , P ⁇ y′-x′, so the embodiment of the first aspect can be used to determine the listening time period.
  • Fig. 14 is another example diagram of the listening time window of the embodiment of the present application.
  • P>y'-x' if the embodiment of the first aspect is used, the determined listening time period will be limited to within the reference time period. However, P-period services located outside the reference period may still reserve resources within Y time units of the resource selection period. To solve this problem, when P ⁇ y'-x', for the time unit y in the resource selection time period, the device needs to monitor the time unit y-P. The listening time period determined in this way is shown in FIG. 14 .
  • An embodiment of the present application provides a method for selecting a side link resource, which will be described from the perspective of a terminal device, and the same contents as those of the first and second aspects will not be repeated.
  • the embodiments of the third aspect may be implemented in combination with the embodiments of the first and second aspects, or may be implemented independently.
  • the terminal device determines whether to enable a first listening time period; and if the first listening time period is enabled, listens for the sidelink control information during the first listening time period ; under the condition that the first listening time period is not enabled, the side link control information is not monitored during the first listening time period.
  • the listening time period during which the device listens to the periodic P (P ⁇ P 100 ) service is not constant, but can be dynamically enabled or disabled.
  • the device may need to monitor additional time units. For these additional monitor time units, the device monitor consumes extra power. Therefore, it may be considered to enable or disable the first monitor time period.
  • the terminal device when the terminal device receives a periodic service whose cycle is the service period before the first listening time period, the terminal device enables the first listening time period; during the first listening time period If no periodic service with a period equal to the service period is received before the period, the first listening time period is not enabled.
  • the device For example, if the device has not received the SCI indicating the period P before the listening time period, the device considers that the probability of being interfered by the period P service during resource selection is very small, so the device can disable these additional increases. , that is, it is not necessary to increase the monitoring opportunity for the monitoring period P services. Power can be saved by not adding any time unit that needs to be monitored. Otherwise, the device monitors the determined monitoring time period according to the first and second embodiments described above.
  • the monitoring of the short-period service can be dynamically turned on or off, so that the beneficial effect of power saving can be achieved.
  • An embodiment of the present application provides an apparatus for selecting a side link resource.
  • the apparatus may be, for example, a terminal device, or may be one or some components or components configured in the terminal device, and the same contents as those of the embodiments in the first to third aspects will not be repeated.
  • FIG. 15 is a schematic diagram of an apparatus for selecting a side link resource according to an embodiment of the present application.
  • the side link resource selection apparatus 1500 includes:
  • a determination unit 1501 which determines the first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period;
  • a monitoring unit 1502 which monitors side link control information during the first listening time period
  • An exclusion unit 1503 which performs resource exclusion for candidate resources within the selected time period according to the received side link control information.
  • the first listening time period includes time unit x;
  • the first listening time period includes time unit x;
  • x x′-mod(A,P)
  • mod() represents the modulo operation
  • x' represents the last time unit of the sensing period
  • P represents the service period
  • y' represents the last time unit of the selection period
  • y represents the selection period time unit in .
  • the first listening time period includes time unit x;
  • x x′-P+mod(B,P)
  • mod() represents the modulo operation
  • x' represents the last time unit of the sensing period
  • P represents the service period
  • y' represents the last time unit of the selection period
  • y represents the selection period time unit in .
  • the determining unit 1501 is configured to: determine a reference time period, the last time unit of the reference time period is the last time unit of the sensing time period, and the time length of the reference time period is equal to the a service period; periodically repeating the selected time period in the reverse time direction one or more times according to the service period to obtain one or more periodic time periods; and combining the reference time period with the one or more periodic time periods A time period in which the periodic time periods at least partially overlap is determined as the first listening time period.
  • the determining unit 1501 is configured to: determine a reference time period, the last time unit of the reference time period is the last time unit of the sensing time period, and the time length of the reference time period is equal to the business cycle; periodically repeating the selected time period in the reverse time direction one or more times according to the business cycle to obtain a last cycle time period that at least partially overlaps with the reference time period; the last cycle time The last time unit in the segment along the reference time segment is divided into a first time segment and a second time segment; and offsetting the second time segment in the reverse time direction by the time length of the service cycle, and converting The first time period and the offset second time period are determined as the first listening time period.
  • the monitoring unit 1502 is further configured to: monitor the side link control information in the union formed by the second listening time period and the first listening time period; One time unit is the last time unit of the sensing time period, and the time length of the second listening time period is equal to the time length of the service period or the selection time period.
  • the service period is less than the time interval between the last time unit of the sensing time period and the last time unit of the selection time period.
  • the time length of the first listening time period is less than or equal to the service period.
  • the time length of the selected time period is less than the service period.
  • the service period is greater than or equal to the time interval between the last time unit of the sensing time period and the last time unit of the selection time period.
  • the service period is a period of a service that the terminal device wants to avoid, and the service period is less than 100 milliseconds.
  • the last time unit of the sensing time period is one of the following:
  • Time unit y'-P 100 where y' represents the last time unit of the selected time period, and P 100 represents the number of time units included in 100 milliseconds;
  • n represents the physical time unit that the higher layer triggers resource selection, Indicates the processing time, in physical time units;
  • z' represents the first time unit of the selected time period
  • T represents the processing time, in physical time units.
  • the first sidelink control information indicating that the service period is P rsvp_RX is received at time unit m, and the reference signal received power (RSRP) obtained based on the first sidelink control information is higher than RSRP threshold,
  • the exclusion unit 1503 excludes the following candidate resources:
  • the time-frequency resource and the candidate resource determined based on the first sidelink control information or based on the second sidelink control information that can be received in the time unit m+q ⁇ P rsvp_RX overlapping,
  • the determining unit 1501 is further configured to: determine whether to enable the first listening time period; and if the first listening time period is enabled, listen during the first listening time period the side link control information; if the first listening time period is not enabled, the side link control information is not monitored during the first listening time period.
  • the first listening time period in the case where a periodic service whose cycle is the service period is received before the first listening time period, the first listening time period is enabled; before the first listening time period The first listening time period is not enabled in the case where the periodic service whose cycle is the service cycle is not received.
  • the side link resource selection apparatus 1500 may further include other components or modules, and for the specific content of these components or modules, reference may be made to the related art.
  • FIG. 15 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used.
  • the above-mentioned components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc. The implementation of this application does not limit this.
  • the terminal device determines the first monitoring time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period; Side link control information. In this way, resource collision with short-cycle services can be effectively avoided, thereby improving the reliability of V2X, for example, ensuring the personal safety of pedestrians in P2X.
  • An embodiment of the present application further provides a communication system, and reference may be made to FIG. 1 , and the same content as the embodiments of the first aspect to the fourth aspect will not be repeated.
  • the communication system 100 may include at least:
  • the terminal device 102 which determines a first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period; monitors the side link control information in the first listening time period; and performing resource exclusion on candidate resources within the selection time period according to the received side link control information.
  • the embodiment of the present application also provides a network device, which may be, for example, a base station, but the present application is not limited to this, and may also be other network devices.
  • a network device which may be, for example, a base station, but the present application is not limited to this, and may also be other network devices.
  • FIG. 16 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • the network device 1600 may include: a processor 1610 (eg, a central processing unit CPU) and a memory 1620 ; the memory 1620 is coupled to the processor 1610 .
  • the memory 1620 can store various data; in addition, the program 1630 for information processing is also stored, and the program 1630 is executed under the control of the processor 1610 .
  • the network device 1600 may further include: a transceiver 1640, an antenna 1650, etc.; wherein, the functions of the above components are similar to those in the prior art, and details are not repeated here. It is worth noting that the network device 1600 does not necessarily include all the components shown in FIG. 16 ; in addition, the network device 1600 may also include components not shown in FIG. 16 , and reference may be made to the prior art.
  • the embodiment of the present application also provides a terminal device, but the present application is not limited to this, and may also be other devices.
  • FIG. 17 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 1700 may include a processor 1710 and a memory 1720 ; the memory 1720 stores data and programs, and is coupled to the processor 1710 .
  • this figure is exemplary; other types of structures may be used in addition to or in place of this structure to implement telecommunication functions or other functions.
  • the processor 1710 may be configured to execute a program to implement the side link resource selection method described in the embodiments of the first to third aspects.
  • the processor 1710 may be configured to perform the following control: determine a first listening time period according to at least the service period, the last time unit of the sensing time period, and the last time unit of the selection time period; internal monitoring of side link control information; and performing resource exclusion on candidate resources within the selected time period according to the received side link control information.
  • the terminal device 1700 may further include: a communication module 1730 , an input unit 1740 , a display 1750 , and a power supply 1760 .
  • the functions of the above components are similar to those in the prior art, and details are not repeated here. It is worth noting that the terminal device 1700 does not necessarily include all the components shown in FIG. 17 , and the above components are not required; in addition, the terminal device 1700 may also include components not shown in FIG. 17 . There is technology.
  • An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the side link resource selection method described in the embodiments of the first to third aspects.
  • An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the side link resource selection method described in the embodiments of the first to third aspects.
  • the apparatuses and methods above in the present application may be implemented by hardware, or may be implemented by hardware combined with software.
  • the present application relates to a computer-readable program that, when executed by logic components, enables the logic components to implement the above-described apparatus or constituent components, or causes the logic components to implement the above-described various methods or steps.
  • the present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, and the like.
  • the method/apparatus described in conjunction with the embodiments of this application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two.
  • one or more of the functional block diagrams shown in the figures and/or one or more combinations of the functional block diagrams may correspond to either software modules or hardware modules of the computer program flow.
  • These software modules may respectively correspond to the various steps shown in the figure.
  • These hardware modules can be implemented by, for example, solidifying these software modules using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor, such that the processor can read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
  • the functional blocks and/or one or more combinations of the functional blocks described in the figures can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof.
  • DSP digital signal processor
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • One or more of the functional blocks and/or one or more combinations of the functional blocks described with respect to the figures can also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors processor, one or more microprocessors in communication with the DSP, or any other such configuration.
  • a side link resource selection method comprising:
  • the terminal device determines the first listening time period at least according to the service period, the last time unit of the sensing time period, and the last time unit of the selection time period;
  • Resource exclusion is performed on candidate resources within the selected time period according to the received side link control information.
  • Supplement 2 The method according to Supplement 1, wherein the first listening time period includes a time unit x;
  • Supplement 3 The method according to Supplement 1, wherein the first listening time period includes a time unit x;
  • x x′-mod(A,P)
  • mod() represents the modulo operation
  • x' represents the last time unit of the sensing period
  • P represents the service period
  • y' represents the last time unit of the selection period
  • y represents the selection period time unit in .
  • Supplement 4 The method according to Supplement 1, wherein the first listening time period includes a time unit x;
  • x x′-P+mod(B,P)
  • mod() represents the modulo operation
  • x' represents the last time unit of the sensing period
  • P represents the service period
  • y' represents the last time unit of the selection period
  • y represents the selection period time unit in .
  • the terminal device determines a reference time period, the last time unit of the reference time period is the last time unit of the sensing time period, and the time length of the reference time period is equal to the service period;
  • a time period in which the reference time period and the one or more periodic time periods at least partially overlap is determined as the first listening time period.
  • the terminal device determines a reference time period, the last time unit of the reference time period is the last time unit of the sensing time period, and the time length of the reference time period is equal to the service period;
  • the selected time period is periodically repeated one or more times in the reverse time direction according to the service cycle, so as to obtain a last cycle time period that at least partially overlaps with the reference time period; the middle edge of the last cycle time period the last time unit of the reference time period is divided into a first time period and a second time period; and
  • Supplement 7 The method according to any one of Supplementary Notes 1 to 6, wherein the method further comprises:
  • the terminal device also monitors the side link control information in the union formed by the second listening time period and the first listening time period; wherein, the last time unit of the second listening time period is the sensing time The last time unit of the segment, the time length of the second listening time segment is equal to the time length of the service period or the selection time segment.
  • Supplement 8 The method according to any one of Supplements 1 to 7, wherein the service period is less than the time between the last time unit of the sensing time period and the last time unit of the selection time period interval.
  • Supplement 9 The method according to any one of Supplementary Notes 1 to 8, wherein the time length of the first listening time period is less than or equal to the service period.
  • Supplementary Note 10 The method according to any one of Supplementary Notes 1 to 9, wherein the time length of the selected time period is less than the service period.
  • Supplement 12 The method according to Supplement 11, wherein the service period is greater than or equal to the time interval between the last time unit of the sensing time period and the last time unit of the selection time period.
  • Supplementary Note 13 The method according to any one of Supplementary Notes 1 to 12, wherein the service period is a period of a service that the terminal device wants to avoid, and the service period is less than 100 milliseconds.
  • Supplementary Note 14 The method according to any one of Supplementary Notes 1 to 13, wherein the last time unit of the sensing time period is one of the following:
  • Time unit y'-P 100 where y' represents the last time unit of the selected time period, and P 100 represents the number of time units included in 100 milliseconds;
  • n represents the physical time unit that the higher layer triggers resource selection, Indicates the processing time, in physical time units;
  • z' represents the first time unit of the selected time period
  • T represents the processing time, in physical time units.
  • Supplement 15 The method according to Supplement 14, wherein, or in and Indicates the processing time, in physical time units.
  • Supplement 16 The method according to any one of Supplementary Notes 1 to 10, wherein the terminal device receives, in time unit m, the first side link control information indicating that the service period is P rsvp_RX , and based on the first side link control information
  • the terminal device excludes the following candidate resources:
  • the time-frequency resource and the candidate resource determined based on the first sidelink control information or based on the second sidelink control information that can be received in the time unit m+q ⁇ P rsvp_RX overlapping,
  • the terminal device determines whether to enable the first listening period
  • the side link control information is monitored during the first listening time period; if the first listening time period is not enabled, the side link control information is not monitored in the first listening time period. The side link control information is monitored within the first monitoring time period.
  • Supplement 18 The method according to Supplement 17, wherein, in the case that the terminal device receives a periodic service whose cycle is the service cycle before the first listening time period, enables the first A listening time period; in the case that no periodic service with a cycle of the service period is received before the first listening time period, the first listening time period is not enabled.
  • a terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the side according to any one of Supplementary Notes 1 to 18 Link resource selection method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请实施例提供一种边链路资源选择方法以及装置，所述方法包括：终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听边链路控制信息；以及根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。

Description

边链路资源选择方法以及装置 技术领域
本申请实施例涉及通信技术领域。
背景技术
对于与车辆通信相关的技术，包括V2X(Vehicle to Everything)、P2X(Pedestrian to Everything)等等(以下也可以统称为V2X)，发送设备可以通过边链路(sidelink)与接收设备直接进行通信。目前长期演进(LTE，Long Term Evolution)和新无线(NR，New Radio)系统都支持V2X通信，即LTE V2X和NR V2X。
对于边链路，边链路控制信息(SCI，Sidelink Control Information)由物理边链路控制信道(PSCCH，Physical Sidelink Control Channel)承载，边链路数据信息由物理边链路共享信道(PSSCH，Physical Sidelink Shared Channel)承载，边链路反馈信息(ACK/NACK)由物理边链路反馈信道(PSFCH，Physical Sidelink Feedback Channel)承载。LTE V2X定义了PSCCH、PSSCH。NR V2X定义了PSCCH、PSSCH和PSFCH。
边链路中的发送设备可以基于感知(sensing)结果，自主地对用于信息发送的时频资源进行选择。其中，感知包括监听(monitor)SCI、测量参考信号接收功率(RSRP，Reference Signal Received Power)和测量接收信号强度指示(RSSI，Received Signal Strength Indicator)等。通过感知，可以在资源选择时避开已经被其他设备预留的资源，因此可以避免与其他设备的边链路传输发生碰撞，从而避免干扰。
对于自主资源选择，目前包括以下方案：全部感知、部分感知(partial sensing)和随机选择(random selection)。对于全部感知，设备在每个子帧或时隙进行感知，可以有效避免干扰，但持续感知意味着持续的功率消耗，虽然这对于V2X中的车辆设备而言问题不大，但对于P2X中的行人设备，设备功耗也是需要考虑的重要因素。对于部分感知，设备不需要在每个子帧或时隙进行感知，而仅需要在部分子帧或时隙进行感知，这有利于降低设备功耗(power reduction)，例如，对于不具备充足电源供应的P2X中行人的发送设备，可以大大节省功率。对于随机选择，设备可以完全不进行感知。这三种方法在不同程度上在避免干扰和节省功率之间进行了折中。LTE V2X支持全部感知、部分感知和随机选择。NR V2X目前没有提供对部分感知的支持。
应该注意，上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现：相比LTE V2X，NR V2X支持具有更多种周期的短周期业务(周期小于100毫秒的业务)。更具体地，对于LTE V2X，短周期业务的周期只能为20毫秒(ms)和50毫秒；对于NR V2X，短周期业务的周期可以为1毫秒～99毫秒。NR V2X目前不支持部分感知，而传统LTE V2X的部分感知又无法避开被NR V2X短周期业务预留的资源，因此无法避免碰撞以及由此带来的干扰，从而影响V2X发送的可靠性，例如无法保障P2X中行人的人身安全。
针对上述问题的至少之一，本申请实施例提供一种边链路资源选择方法以及装置。
根据本申请实施例的一个方面，提供一种边链路资源选择方法，包括：
终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；
在所述第一监听时间段内监听边链路控制信息；以及
根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
根据本申请实施例的另一个方面，提供一种边链路资源选择装置，包括：
确定部，其至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；
监听部，其在所述第一监听时间段内监听边链路控制信息；以及
排除部，其根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
根据本申请实施例的另一个方面，提供一种通信系统，包括：
终端设备，其至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听边链路控制信息；以及根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
本申请实施例的有益效果之一在于：终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听(monitor)边链路控制信息。由此，能够有效避免与短周期业务发生资 源碰撞，从而提升V2X可靠性，例如保障P2X中行人的人身安全。
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是本申请实施例的通信系统的示意图；
图2是本申请实施例的感知的一示例图；
图3是本申请实施例的资源选择方法的一示意图；
图4是本申请实施例的确定第一监听时间段的一示例图；
图5是本申请实施例的第一监听时间段的一示例图；
图6是本申请实施例的第一监听时间段的另一示例图；
图7是本申请实施例的第一监听时间段的另一示例图；
图8是本申请实施例的第一监听时间段的另一示例图；
图9是本申请实施例的第一监听时间段的另一示例图；
图10是本申请实施例的第一监听时间段的另一示例图；
图11是本申请实施例的第一监听时间段的另一示例图；
图12是本申请实施例的监听时间段的一示例图；
图13是本申请实施例的监听时间窗的另一示例图；
图14是本申请实施例的监听时间窗的另一示例图；
图15是本申请实施例的边链路资源选择装置的一示意图；
图16是本申请实施例的网络设备的示意图；
图17是本申请实施例的终端设备的示意图。
具体实施方式
参照附图，通过下面的说明书，本申请的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本申请的特定实施方式，其表明了其中可以采用本申请的原则的部分实施方式，应了解的是，本申请不限于所描述的实施方式，相反，本申请包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本申请实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出。
在本申请实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信系统中设备之间的通信可以根据任意阶段的通信协议进行，例如可以包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及5G、新无线(NR，New Radio)等等，和/或其他目前已知或未来将被开发的通信协议。
在本申请实施例中，术语“网络设备”例如是指通信系统中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备：基站(BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，等等，此外还可包括远端无线头(RRH，Remote Radio Head)、 远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例如femeto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本申请实施例中，术语“用户设备”(UE，User Equipment)或者“终端设备”(TE，Terminal Equipment或Terminal Device)例如是指通过网络设备接入通信网络并接收网络服务的设备。终端设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、站，等等。
其中，终端设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，终端设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
此外，术语“网络侧”或“网络设备侧”是指网络的一侧，可以是某一基站，也可以包括如上的一个或多个网络设备。术语“用户侧”或“终端侧”或“终端设备侧”是指用户或终端的一侧，可以是某一UE，也可以包括如上的一个或多个终端设备。本文在没有特别指出的情况下，“设备”可以指网络设备，也可以指终端设备。
以下通过示例对本申请实施例的场景进行说明，但本申请不限于此。
图1是本申请实施例的通信系统的示意图，示意性说明了以终端设备和网络设备为例的情况，如图1所示，通信系统100可以包括网络设备101和终端设备102、103。为简单起见，图1仅以两个终端设备和一个网络设备为例进行说明，但本申请实施例不限于此。
在本申请实施例中，网络设备101和终端设备102、103之间可以进行现有的业务或者未来可实施的业务发送。例如，这些业务可以包括但不限于：增强的移动宽带(eMBB，enhanced Mobile Broadband)、大规模机器类型通信(mMTC，massive Machine Type Communication)和高可靠低时延通信(URLLC，Ultra-Reliable and Low-Latency Communication)，等等。
值得注意的是，图1示出了两个终端设备102、103均处于网络设备101的覆盖范围内，但本申请不限于此。两个终端设备102、103可以均不在网络设备101的覆盖范围内，或者一个终端设备102在网络设备101的覆盖范围之内而另一个终端设备103在网络设备101的覆盖范围之外。
在本申请实施例中，两个终端设备102、103之间可以进行边链路发送。例如，两个终端设备102、103可以都在网络设备101的覆盖范围之内进行边链路发送以实现V2X通信，也可以都在网络设备101的覆盖范围之外进行边链路发送以实现V2X通信，还可以一个终端设备102在网络设备101的覆盖范围之内而另一个终端设备103在网络设备101的覆盖范围之外进行边链路发送以实现V2X通信。
在本申请实施例中，终端设备102和/或103可以自主选择边链路资源(即采用Mode2)，在这种情况下边链路发送可以与网络设备101无关，即网络设备101是可选的。当然，本申请实施例也可以将自主选择边链路资源(即采用Mode 2)和由网络设备分配边链路资源(即采用Mode 1)结合起来；本申请实施例不对此进行限制。
在LTE V2X中，终端设备能够通过感知检测+资源选择的过程来获得边链路发送资源，其中可以持续不断地进行感知(sensing)来获得资源池内资源的占用情况。例如，终端设备可以根据前一段时间内(称为感知窗或者感知时间段)的资源占用情况来估计后一段时间内(称为选择窗或选择时间段)的资源占用情况。
例如，LTE V2X部分感知的步骤可以参考3GPP TS 36.213 V15.2.0中第14.1.1.6小节等处的内容，LTE V2X部分感知的主要步骤可以如下表1所述：
表1
Figure PCTCN2020122997-appb-000001
Figure PCTCN2020122997-appb-000002
对于Rel-16 NR V2X的自主资源选择(Mode 2)，终端设备基于自身感知结果(sensing result)进行资源选择和发送，这可以在一定程度上避免设备间的干扰或碰撞。资源选择的步骤可以参见标准TS 38.214 V16.2.0的8.1.4小节。NR V2X目前不支持部分感知。
相比LTE V2X，NR V2X支持具有更多种周期的短周期业务。更具体地，对于LTE  V2X，短周期业务的周期只能为20毫秒和50毫秒；对于NR V2X，短周期业务的周期可以为1毫秒～99毫秒。NR V2X目前不支持部分感知，而传统LTE V2X的部分感知又无法避开被NR V2X短周期业务预留的资源，因此无法避免碰撞以及由此带来的干扰，从而影响V2X发送的可靠性，例如无法保障P2X中行人的人身安全。
图2是本申请实施例的感知的一示例图。如图2所示，如果使用LTE V2X部分感知，只有短周期业务满足条件y′-m≤P step×P rsvp_RX+P step时，设备才会在资源选择时避开该短周期业务。满足上述条件实际上等价于只有在监听窗内接收(或监听)到短周期业务的SCI，设备才会在资源选择时避开该短周期业务。其中，监听窗的时间长度小于或等于短周期业务周期。根据上述条件确定的监听窗如图2所示。
如图2所示，假设Y个逻辑子帧在时间上为15毫秒，对于Y个逻辑子帧中的逻辑子帧y，设备监听逻辑子帧y-100和逻辑子帧y-200。逻辑子帧指资源池内的子帧。对于逻辑子帧x，其对应的物理子帧记为
Figure PCTCN2020122997-appb-000003
根据LTE V2X部分感知，对于周期为20毫秒的短周期业务，设备确定的监听窗如图2上部所示，监听窗为15毫秒。如图2的上部所示，如果短周期业务的周期为20毫秒，在15毫秒的监听窗(如201所示)中能够监听到20毫秒短周期业务的资源m，因此设备在资源选择时可以避开周期为20毫秒的周期业务。
根据LTE V2X部分感知，对于周期为80毫秒的短周期业务，设备确定的监听窗如图2下部所示，监听窗为15毫秒。如图2的下部所示，如果短周期业务的周期为80毫秒，在15毫秒的监听窗(如202所示)中不能监听到80毫秒短周期业务的资源(m、m1和m2均未落入该时间段中)，因此无法避开周期为80毫秒的短周期业务。因此，LTE V2X部分感知不能够避开除20毫秒和50毫秒之外的短周期业务。以下针对这些问题对本申请实施例进行说明。
在本申请实施例中，以V2X为例对边链路进行说明，但本申请不限于此，还可以适用于V2X以外的边链路发送场景。在以下的说明中，在不引起混淆的情况下，术语“边链路”和“V2X”可以互换，术语“PSFCH”和“边链路反馈信道”可以互换，术语“PSCCH”和“边链路控制信道”或“边链路控制信息”可以互换，术语“PSSCH”和“边链路数据信道”或“边链路数据”也可以互换。
另外，发送(transmitting)或接收(receiving)PSCCH可以理解为发送或接收由PSCCH承载的边链路控制信息；发送或接收PSSCH可以理解为发送或接收由PSSCH承载的边 链路数据；发送或接收PSFCH可以理解为发送或接收由PSFCH承载的边链路反馈信息。边链路发送(Sidelink transmission，也可称为边链路传输)可以理解为PSCCH/PSSCH发送或者边链路数据/信息发送。
第一方面的实施例
本申请实施例提供一种边链路资源选择方法，从终端设备进行说明。该终端设备可以向其他终端设备发送边链路数据，因此该终端设备需要进行资源选择/重选以确定边链路数据的发送资源。从边链路数据发送的角度，本申请实施例的该终端设备为发送设备，其他终端设备为接收设备。
图3是本申请实施例的资源选择方法的一示意图，如图3所示，该方法包括：
301，终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；
302，所述终端设备在该第一监听时间段内监听(monitor)边链路控制信息；以及303，所述终端设备根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
值得注意的是，以上附图3仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图3的记载。
在本申请实施例中，终端设备可以进行边链路资源选择或重选，称为(re-)selection，其中包括资源排除。所述资源重选可以由该终端设备进行资源重评估或抢占检测的结果触发，也可以将“资源选择或重选”称为“资源选择/资源重选/资源重评估/抢占检测”。关于资源选择/资源重选/资源重评估/抢占检测，以及资源排除的具体内容，可以参考相关技术，在此不再赘述。
在一些实施例中，所述业务周期为所述终端设备想要避开的业务的周期，所述业务周期小于100毫秒。本申请实施例中的时间单元表示的是逻辑时间单元，即属于边链路资源池的时间单元。时间单元可以是子帧、时隙、或者符号。
假设T毫秒能够转换成P T个时间单元，也简称为P T对应T毫秒。对于物理时间单元
Figure PCTCN2020122997-appb-000004
与其对应的逻辑时间单元(时间单元)可以表示为x或
Figure PCTCN2020122997-appb-000005
或其他形式。为便于描述，本申请实施例使用x表示与物理时间单元
Figure PCTCN2020122997-appb-000006
对应的时间单元。
在一些实施例中，终端设备确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到一个或多个周期时间段；以及将所述参考时间段和所述一个或多个周期时间段至少部分重叠的时间段确定为所述第一监听时间段。
图4是本申请实施例的确定第一监听时间段的一示例图。设备在资源选择时间段内进行资源选择；如果设备要在资源选择时避开周期为P的周期业务，则设备需要在本申请实施例确定的第一监听时间段内监听SCI。否则，将有一些周期为P的周期业务可能是设备无法避开的。
在本申请实施例中，针对周期小于100毫秒的周期业务，换句话说，周期为P的周期业务是周期小于100毫秒的周期业务，记为P＜P 100，其中100毫秒转换成逻辑时间单元后为P 100，即P 100表示100毫秒包括的时间单元个数。
如图4所述，将设备能够监听的最后一个时间单元记为x′，参考时间段包括时间单元x′-P+1,x′-P+2,…,x′-1,x′。参考时间段的最后一个时间单元为x′，参考时间段的时间长度等于P。
如图4所示，资源选择时间段是包括了设备能够进行资源选择的时间单元。资源选择时间段包括Y个时间单元。将资源选择时间段的最后一个时间单元记为y′，y′即为设备能够进行资源选择的最后一个时间单元。将最后一个监听的时间单元与最后一个资源选择的时间单元之间的时间间隔记为y′-x′。
例如，如图4所示，可以将资源选择时间段沿逆时间轴方向，以P为周期进行周期性重复，即可得到多个周期时间段401和402。多个周期时间段包含至少两个资源选择时间段周期重复后的副本。多个周期时间段与参考时间段的交集即为第一监听时间段(包括图4中(1)和(2)所示的两段时间段)。设备只要对第一监听时间段包括的时间单元进行监听，就可以避开周期为P的周期业务。
在一些实施例中，终端设备确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到与所述参考时间段至少部分重叠的最后一个周期时间段；所述最后一个周期时间段中沿所述参考时间段的最后一个时间单元被分为第一时间段和第二时间段；以及将所述第二时间段沿逆时间方向偏移所述业务周期的时间长度，并将所述第一时间段和偏移后的所述第 二时间段确定为所述第一监听时间段。
例如，如图4所示，可以将资源选择时间段沿逆时间轴方向，以P为周期进行周期性重复，即可得到多个周期时间段401和402。可以得到与所述参考时间段至少部分重叠的最后一个周期时间段401；所述最后一个周期时间段中沿所述参考时间段的最后一个时间单元被分为第一时间段(2)和第二时间段4011，将所述第二时间段4011沿逆时间方向偏移所述业务周期的时间长度(即为时间段(1))，并将所述第一时间段(2)和偏移后的所述第二时间段(1)确定为所述第一监听时间段。设备只要对第一监听时间段包括的时间单元进行监听，就可以避开周期为P的周期业务。
在一些实施例中，所述第一监听时间段包括时间单元x；
x＝y-k×P；当y≤x′+(α-1)×P时，k＝α-1；否则，k＝α，
Figure PCTCN2020122997-appb-000007
x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
在一些实施例中，所述第一监听时间段包括时间单元x；
x＝x′-mod(A,P)，
Figure PCTCN2020122997-appb-000008
mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
在一些实施例中，所述第一监听时间段包括时间单元x；
x＝x′-P+mod(B,P)，
Figure PCTCN2020122997-appb-000009
mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
在一些实施例中，所述业务周期小于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。即，P＜y′-x′。
在一些实施例中，所述第一监听时间段的时间长度小于或等于所述业务周期。
在一些实施例中，所述选择时间段的时间长度小于所述业务周期。
图5是本申请实施例的第一监听时间段的一示例图，对以上表述以及相关变量含义进行了示意性说明；其中，Y＜P。
图6是本申请实施例的第一监听时间段的另一示例图，对以上表述以及相关变量含义进行了示意性说明；其中，Y＞P。
图7是本申请实施例的第一监听时间段的另一示例图，对以上表述以及相关变量含 义进行了示意性说明；其中，Y＝P。
在本申请实施例中，对于如何确定设备能够监听的最后一个时间单元x′不做限制。例如，x′是监听100毫秒周期业务的时间单元；或者，x′是监听非周期业务的时间单元；或者x′是由设备处理能力决定的能够监听的最后一个时间单元。
在一些实施例中，所述感知时间段的最后一个时间单元是：时间单元y′-P 100，其中y′表示所述选择时间段的最后一个时间单元，P 100表示100毫秒包括的时间单元个数。
在一些实施例中，所述感知时间段的最后一个时间单元是：时间上位于物理时间单元
Figure PCTCN2020122997-appb-000010
之前的最后一个时间单元，其中n表示高层触发资源选择的物理时间单元，
Figure PCTCN2020122997-appb-000011
表示处理时间，以物理时间单元为单位。
在一些实施例中，所述感知时间段的最后一个时间单元是：时间上位于物理时间单元
Figure PCTCN2020122997-appb-000012
之前的最后一个时间单元，其中z′表示所述选择时间段的第一个时间单元，
Figure PCTCN2020122997-appb-000013
表示选择时间段的第一个物理时间单元，T表示处理时间，以物理时间单元为单位。
例如，
Figure PCTCN2020122997-appb-000014
或者
Figure PCTCN2020122997-appb-000015
其中
Figure PCTCN2020122997-appb-000016
和
Figure PCTCN2020122997-appb-000017
表示处理时间，以物理时间单元为单位。
假设时间单元为时隙，
Figure PCTCN2020122997-appb-000018
和
Figure PCTCN2020122997-appb-000019
可以沿用标准TS 38.214中的取值，例如，如表2和表3所示。
表2
Figure PCTCN2020122997-appb-000020
表3
Figure PCTCN2020122997-appb-000021
Figure PCTCN2020122997-appb-000022
图8是本申请实施例的第一监听时间段的另一示例图，将时间单元替换为时隙进行说明。设备在资源选择窗内确定Y个物理时隙(也对应着Y个逻辑时隙)，其中最后一个物理时隙为
Figure PCTCN2020122997-appb-000023
这里y′表示逻辑时隙索引，将y′转换为物理时隙后，得到的物理时隙索引表示为
Figure PCTCN2020122997-appb-000024
设备能够监听的最后一个物理时隙为物理时隙
Figure PCTCN2020122997-appb-000025
其中x′＝y′-P step。
本申请实施例对于如何确定P step不做限制。例如在LTE V2X部分感知中，设备能够监听的最后一个物理时隙(子帧)为
Figure PCTCN2020122997-appb-000026
其中，x′＝y′-P step，P step是将100毫秒转换为逻辑时隙后得到的逻辑时隙个数。如果设备需要监听周期为P rsvp_RX的周期业务(P rsvp_RX＜P step，P rsvp_RX以逻辑时隙为单位)，则对于Y个物理时隙中的物理时隙
Figure PCTCN2020122997-appb-000027
设备监听物理时隙
Figure PCTCN2020122997-appb-000028
其中z＝y′-P step-mod(A,P rsvp_RX)，并且
Figure PCTCN2020122997-appb-000029
Figure PCTCN2020122997-appb-000030
图9是本申请实施例的第一监听时间段的另一示例图，与图8相比，图9中Y的取值更小。如图8所示，本申请实施例确定的监听时间段实际上可以看作是在参考时间段内进行了循环移位的Y个时隙。如图9所示，当Y取值变小时，监听时间段实际上没有进行循环移位，或者循环移位的位移量为零，是循环移位的一种特例。
图10是本申请实施例的第一监听时间段的另一示例图，图11是本申请实施例的第一监听时间段的另一示例图。与图8、9相比，图10、图11中
Figure PCTCN2020122997-appb-000031
的取值变得更大。更具体地，图8、图9中
Figure PCTCN2020122997-appb-000032
图10、图11中
Figure PCTCN2020122997-appb-000033
由此可以看到，本申请实施例可以适用于不同的参数配置情况。
在一些实施例中，终端设备还在第二监听时间段与第一监听时间段形成的并集内监听边链路控制信息；其中，所述第二监听时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述第二监听时间段的时间长度等于所述业务周期或者所述选择时间段的时间长度。
图12是本申请实施例的监听时间段的一示例图，例如，设备的监听时间段包括使用本申请实施例确定的第一监听时间段与使用LTE V2X感知确定的第二监听时间段的并集。
如图12所示，时间段(1)和(2)是按照本申请实施例确定的第一监听时间段；时间段(3)是按照例如LTE V2X部分感知确定的第二监听时间段，其中，时间段(3)的最后一个时间单元为x’。时间段(3)包括Z个时间单元，其中，Z是P和Y中的最小值，即Z＝min(P,Y)。如图12所示，监听时间段为时间段(1)、(2)和(3)的并集。
以上示意性说明了第一监听时间段，以下对设备的资源选择或资源排除进行说明。
在一些实施例中，终端设备在时间单元m接收到指示了业务周期为P rsvp_RX的第一边链路控制信息，且基于该第一边链路控制信息获得的参考信号接收功率(RSRP)高于RSRP门限，所述终端设备将如下的候选资源排除：
基于所述第一边链路控制信息或基于能够在时间单元m+q×P rsvp_RX接收到的第二边链路控制信息确定的时频资源与所述候选资源
Figure PCTCN2020122997-appb-000034
重叠，
其中，j＝0,1,…,C resel-1，q＝1,2,…,Q，C resel表示所述终端设备需要发送的时间单元个数，如果P rsvp_RX＜P step，并且时间单元m位于参考时间段内，则
Figure PCTCN2020122997-appb-000035
否则Q＝1，P step为感知时间段的最后一个时间单元和选择时间段的最后一个时间单元之间的时间间隔，P rsvp_TX表示所述终端设备需要发送的业务周期，R x,y表示位于时间单元y的、频率最低子信道为x的若干连续子信道。
以上仅以某一个周期为P rsvp_RX的业务为例进行说明，当设备需要监听多于一个周期为P rsvp_RX的业务时，每个周期性业务都会对应一个监听时间段，该监听时间段是前面所述的第一监听时间段，或者第一监听时间段与第二监听时间段的并集。设备对所有监听时间段的并集进行监听。
终端设备需要监听的某个时间单元可能是为了监听某种周期业务而确定的，但并没有限制终端设备在该时间单元上只监听该周期业务，终端设备无差别地监听SCI。例如，即使某一个时间单元是为了监听P1周期业务而确定的，但在该时间单元上也可能会接收到P2周期业务。为便于说明，对于终端设备为了监听P周期业务而确定的监听时间段，将其简称为P周期业务的监听时间段。
设备可能需要监听和避开多种周期业务，对于不同的周期业务，选择一个相同的时间单元作为设备能够监听的最后一个时间单元，有利于减少设备总共需要监听的时间单元数目，从而节省功率。这是由于基于一个相同的最后一个时间单元确定的针对不同周期业务的监听时间段可能存在交集，监听交集即可获得多个周期业务的资源预留情况，这实际上减少了设备需要监听的时间单元数，有利于降低功耗。
例如，可以以监听100毫秒周期业务为目的，根据LTE V2X部分感知确定100毫秒周期业务的监听时间段，将该监听时间段的最后一个时间单元记为x’。以x’作为设备能够监听的最后一个时间单元，来确定其他周期小于100毫秒的周期业务的监听时间段。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听(monitor)边链路控制信息。由此，能够有效避免与短周期业务发生资源碰撞，从而能够提升V2X可靠性，例如保障P2X中行人的人身安全。
第二方面的实施例
本申请实施例提供一种边链路资源选择方法，从终端设备进行说明，与第一方面的实施例相同的内容不再赘述。第二方面的实施例可以与第一方面的实施例结合起来执行，也可以单独执行。
对于满足P＜P 100的周期业务，对监听时间段的确定还基于P与y′-x′的大小关系。
在一些实施例中，第一监听时间段包括时间单元x；x＝y-P，P表示所述业务周期，y表示所述选择时间段中的时间单元。其中，所述业务周期大于或等于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。
例如，如果P＜y′-x′，使用第一方面的实施例确定监听时间段；如果P≥y′-x′，按照以下方法确定监听时间段：对于资源选择时间段中的时间单元y，设备需要监听时间单元y-P。
再例如，如果P＜y′-x′，对于资源选择时间段中的时间单元y，设备需要监听时间单元x′-mod(A,P)，其中
Figure PCTCN2020122997-appb-000036
如果P≥y′-x′，对于资源选择时间段中的时间单元y，设备需要监听时间单元y-P。
在一些实施例中，设备监听100毫秒周期业务，设备也监听非周期业务。设备能够监听的最后一个时间单元是设备为了监听非周期业务而确定的时间单元，换句话说，设备基于监听非周期业务确定最后一个时间单元。在这种情况下，设备基于监听非周期业务的最后一个时间单元来确定监听P周期业务的监听时间段，而不是基于监听100毫秒周期业务的最后一个时间单元来确定监听P周期业务的监听时间段。
例如，设备基于监听100毫秒周期业务确定的最后一个时间单元x′满足y′-x′＝P 100，设备基于监听非周期业务确定的最后一个时间单元x′可能满足y′-x′＜P 100。由于y′-x′＜P 100，因此可能存在P，使得y′-x′≤P＜P 100。如果P≥y′-x′，设备实际上不应该将P周期业务作为短周期业务处理，否则仍然可能存在无法避开的P周期业务。
图13是本申请实施例的监听时间窗的另一示例图，如图13所示，P＜y′-x′，因此可以使用第一方面的实施例确定监听时间段。
图14是本申请实施例的监听时间窗的另一示例图，如图14所示，P＞y′-x′，如果使用第一方面的实施例，则确定的监听时间段会被限制在参考时间段内。然而，位于参考时间段外的P周期业务仍然可能在资源选择时间段的Y个时间单元内预留资源。为解决这一问题，当P≥y′-x′时，对于资源选择时间段中的时间单元y，设备需要监听时间单元y-P。通过这种方式确定的监听时间段如图14所示。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，可以有效避免与短周期业务发生碰撞，从而能够提升V2X可靠性，例如保障P2X中行人的人身安全。
第三方面的实施例
本申请实施例提供一种边链路资源选择方法，从终端设备进行说明，与第一、二方面的实施例相同的内容不再赘述。第三方面的实施例可以与第一、二方面的实施例结合起来执行，也可以单独执行。
在一些实施例中，终端设备确定是否使能第一监听时间段；以及在使能所述第一监听时间段的情况下，在所述第一监听时间段内监听所述边链路控制信息；在不使能所述第一监听时间段的情况下，不在所述第一监听时间段内监听所述边链路控制信息。
例如，设备对周期P(P＜P 100)业务进行监听的监听时间段不是不变的，而是可 以动态使能(enable)或去使能(disable)的。为监听周期P业务，设备可能需要额外监听一些时间单元，对于这些额外增加的监听时间单元，设备监听会额外消耗功率，因此可以考虑使能或不使能第一监听时间段。
在一些实施例中，终端设备在所述第一监听时间段之前接收到周期为所述业务周期的周期性业务的情况下，使能所述第一监听时间段；在所述第一监听时间段之前没有接收到周期为所述业务周期的周期性业务的情况下，不使能所述第一监听时间段。
例如，如果设备在监听时间段之前，一直没有接收过指示了周期P的SCI，则设备认为在资源选择时受到周期P业务干扰的概率很小，因此设备可以去使能(disable)这些额外增加的监听时间单元，即不必特意为监听周期P业务而增加监听机会。由于没有增加任何需要监听的时间单元，因此可以节省功率。否则，设备按照前面所述的第一、二方面的实施例对确定的监听时间段进行监听。
通过本申请实施例，可以动态开启或关闭对短周期业务的监听，从而可以达到节省功率的有益效果。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
第四方面的实施例
本申请实施例提供一种边链路资源选择装置。该装置例如可以是终端设备，也可以是配置于终端设备的某个或某些部件或者组件，与第一至三方面的实施例相同的内容不再赘述。
图15是本申请实施例的边链路资源选择装置的一示意图。如图15所示，边链路资源选择装置1500包括：
确定部1501，其至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；
监听部1502，其在所述第一监听时间段内监听边链路控制信息；以及
排除部1503，其根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
在一些实施例中，所述第一监听时间段包括时间单元x；
x＝y-k×P；当y≤x′+(α-1)×P时，k＝α-1；否则，k＝α，
Figure PCTCN2020122997-appb-000037
x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
在一些实施例中，所述第一监听时间段包括时间单元x；
x＝x′-mod(A,P)，
Figure PCTCN2020122997-appb-000038
mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
在一些实施例中，所述第一监听时间段包括时间单元x；
x＝x′-P+mod(B,P)，
Figure PCTCN2020122997-appb-000039
mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
在一些实施例中，确定部1501用于：确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到一个或多个周期时间段；以及将所述参考时间段和所述一个或多个周期时间段至少部分重叠的时间段确定为所述第一监听时间段。
在一些实施例中，确定部1501用于：确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到与所述参考时间段至少部分重叠的最后一个周期时间段；所述最后一个周期时间段中沿所述参考时间段的最后一个时间单元被分为第一时间段和第二时间段；以及将所述第二时间段沿逆时间方向偏移所述业务周期的时间长度，并将所述第一时间段和偏移后的所述第二时间段确定为所述第一监听时间段。
在一些实施例中，监听部1502还用于：在第二监听时间段与所述第一监听时间段形成的并集内监听边链路控制信息；其中，所述第二监听时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述第二监听时间段的时间长度等于所述业务周期或者所述选择时间段的时间长度。
在一些实施例中，所述业务周期小于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。
在一些实施例中，所述第一监听时间段的时间长度小于或等于所述业务周期。
在一些实施例中，所述选择时间段的时间长度小于所述业务周期。
在一些实施例中，所述第一监听时间段包括时间单元x；x＝y-P，P表示所述业务周期，y表示所述选择时间段中的时间单元。
在一些实施例中，所述业务周期大于或等于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。
在一些实施例中，所述业务周期为所述终端设备想要避开的业务的周期，所述业务周期小于100毫秒。
在一些实施例中，所述感知时间段的最后一个时间单元是以下之一：
时间单元y′-P 100，其中y′表示所述选择时间段的最后一个时间单元，P 100表示100毫秒包括的时间单元个数；
或者，时间上位于物理时间单元
Figure PCTCN2020122997-appb-000040
之前的最后一个时间单元，其中n表示高层触发资源选择的物理时间单元，
Figure PCTCN2020122997-appb-000041
表示处理时间，以物理时间单元为单位；
或者，时间上位于物理时间单元
Figure PCTCN2020122997-appb-000042
之前的最后一个时间单元，其中z′表示所述选择时间段的第一个时间单元，
Figure PCTCN2020122997-appb-000043
表示选择时间段的第一个物理时间单元，T表示处理时间，以物理时间单元为单位。
在一些实施例中，
Figure PCTCN2020122997-appb-000044
或者
Figure PCTCN2020122997-appb-000045
其中
Figure PCTCN2020122997-appb-000046
和
Figure PCTCN2020122997-appb-000047
表示处理时间，以物理时间单元为单位。
在一些实施例中，在时间单元m接收到指示了业务周期为P rsvp_RX的第一边链路控制信息，且基于该第一边链路控制信息获得的参考信号接收功率(RSRP)高于RSRP门限，
排除部1503将如下的候选资源排除：
基于所述第一边链路控制信息或基于能够在时间单元m+q×P rsvp_RX接收到的第二边链路控制信息确定的时频资源与所述候选资源
Figure PCTCN2020122997-appb-000048
重叠，
其中，j＝0,1,…,C resel-1，q＝1,2,…,Q，C resel表示终端设备需要发送的时间单元个数，如果P rsvp_RX＜P step，并且时间单元m位于参考时间段内，则
Figure PCTCN2020122997-appb-000049
否则Q＝1，P step为感知时间段的最后一个时间单元和选择时间段的最后一个时间单元之间的时间间隔，P rsvp_TX表示所述终端设备需要发送的业务周期，R x,y表示位于时间单元y的、频率最低子信道为x的若干连续子信道。
在一些实施例中，确定部1501还用于：确定是否使能所述第一监听时间段；以及在使能所述第一监听时间段的情况下，在所述第一监听时间段内监听所述边链路控制信息；在不使能所述第一监听时间段的情况下，不在所述第一监听时间段内监听所述边链路控制信息。
在一些实施例中，在所述第一监听时间段之前接收到周期为所述业务周期的周期性业务的情况下，使能所述第一监听时间段；在所述第一监听时间段之前没有接收到周期为所述业务周期的周期性业务的情况下，不使能所述第一监听时间段。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
值得注意的是，以上仅对与本申请相关的各部件或模块进行了说明，但本申请不限于此。边链路资源选择装置1500还可以包括其他部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图15中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本申请实施并不对此进行限制。
由上述实施例可知，终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听(monitor)边链路控制信息。由此，能够有效避免与短周期业务发生资源碰撞，从而能够提升V2X可靠性，例如保障P2X中行人的人身安全。
第五方面的实施例
本申请实施例还提供一种通信系统，可以参考图1，与第一方面至第四方面的实施例相同的内容不再赘述。
在一些实施例中，通信系统100至少可以包括：
终端设备102，其至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听边链路控制信息；以及根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
本申请实施例还提供一种网络设备，例如可以是基站，但本申请不限于此，还可以是其他的网络设备。
图16是本申请实施例的网络设备的构成示意图。如图16所示，网络设备1600可以包括：处理器1610(例如中央处理器CPU)和存储器1620；存储器1620耦合到处理器1610。其中该存储器1620可存储各种数据；此外还存储信息处理的程序1630，并且在处理器1610的控制下执行该程序1630。
此外，如图16所示，网络设备1600还可以包括：收发机1640和天线1650等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，网络设备1600也并不是必须要包括图16中所示的所有部件；此外，网络设备1600还可以包括图16中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种终端设备，但本申请不限于此，还可以是其他的设备。
图17是本申请实施例的终端设备的示意图。如图17所示，该终端设备1700可以包括处理器1710和存储器1720；存储器1720存储有数据和程序，并耦合到处理器1710。值得注意的是，该图是示例性的；还可以使用其他类型的结构，来补充或代替该结构，以实现电信功能或其他功能。
例如，处理器1710可以被配置为执行程序而实现如第一至三方面的实施例所述的边链路资源选择方法。例如处理器1710可以被配置为进行如下的控制：至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听边链路控制信息；以及根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
如图17所示，该终端设备1700还可以包括：通信模块1730、输入单元1740、显示器1750、电源1760。其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，终端设备1700也并不是必须要包括图17中所示的所有部件，上述部件并不是必需的；此外，终端设备1700还可以包括图17中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种计算机程序，其中当在终端设备中执行所述程序时，所述 程序使得所述终端设备执行第一至三方面的实施例所述的边链路资源选择方法。
本申请实施例还提供一种存储有计算机程序的存储介质，其中所述计算机程序使得终端设备执行第一至三方面的实施例所述的边链路资源选择方法。
本申请以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本申请涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。本申请还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本申请实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如，图中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可插入移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本申请进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本申请保护范围的限制。本领域技术人员可以根据本申请 的精神和原理对本申请做出各种变型和修改，这些变型和修改也在本申请的范围内。
关于包括以上实施例的实施方式，还公开下述的附记：
附记1.一种边链路资源选择方法，包括：
终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；
在所述第一监听时间段内监听(monitor)边链路控制信息；以及
根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
附记2.根据附记1所述的方法，其中，所述第一监听时间段包括时间单元x；
x＝y-k×P；当y≤x′+(α-1)×P时，k＝α-1；否则，k＝α，
Figure PCTCN2020122997-appb-000050
x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
附记3.根据附记1所述的方法，其中，所述第一监听时间段包括时间单元x；
x＝x′-mod(A,P)，
Figure PCTCN2020122997-appb-000051
mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
附记4.根据附记1所述的方法，其中，所述第一监听时间段包括时间单元x；
x＝x′-P+mod(B,P)，
Figure PCTCN2020122997-appb-000052
mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
附记5.根据附记1所述的方法，其中，所述方法还包括：
所述终端设备确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；
根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到一个或多个周期时间段；以及
将所述参考时间段和所述一个或多个周期时间段至少部分重叠的时间段确定为所述第一监听时间段。
附记6.根据附记1所述的方法，其中，所述方法还包括：
所述终端设备确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；
根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到与所述参考时间段至少部分重叠的最后一个周期时间段；所述最后一个周期时间段中沿所述参考时间段的最后一个时间单元被分为第一时间段和第二时间段；以及
将所述第二时间段沿逆时间方向偏移所述业务周期的时间长度，并将所述第一时间段和偏移后的所述第二时间段确定为所述第一监听时间段。
附记7.根据附记1至6任一项所述的方法，其中，所述方法还包括：
所述终端设备还在第二监听时间段与所述第一监听时间段形成的并集内监听边链路控制信息；其中，所述第二监听时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述第二监听时间段的时间长度等于所述业务周期或者所述选择时间段的时间长度。
附记8.根据附记1至7任一项所述的方法，其中，所述业务周期小于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。
附记9.根据附记1至8任一项所述的方法，其中，所述第一监听时间段的时间长度小于或等于所述业务周期。
附记10.根据附记1至9任一项所述的方法，其中，所述选择时间段的时间长度小于所述业务周期。
附记11.根据附记1所述的方法，其中，所述第一监听时间段包括时间单元x；x＝y-P，P表示所述业务周期，y表示所述选择时间段中的时间单元。
附记12.根据附记11所述的方法，其中，所述业务周期大于或等于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。
附记13.根据附记1至12任一项所述的方法，其中，所述业务周期为所述终端设备想要避开的业务的周期，所述业务周期小于100毫秒。
附记14.根据附记1至13任一项所述的方法，其中，所述感知时间段的最后一个时间单元是以下之一：
时间单元y′-P 100，其中y′表示所述选择时间段的最后一个时间单元，P 100表示100毫秒包括的时间单元个数；
或者，时间上位于物理时间单元
Figure PCTCN2020122997-appb-000053
之前的最后一个时间单元，其中n表示高层触发资源选择的物理时间单元，
Figure PCTCN2020122997-appb-000054
表示处理时间，以物理时间单元为单位；
或者，时间上位于物理时间单元
Figure PCTCN2020122997-appb-000055
之前的最后一个时间单元，其中z′表示所述 选择时间段的第一个时间单元，
Figure PCTCN2020122997-appb-000056
表示选择时间段的第一个物理时间单元，T表示处理时间，以物理时间单元为单位。
附记15.根据附记14所述的方法，其中，
Figure PCTCN2020122997-appb-000057
或者
Figure PCTCN2020122997-appb-000058
其中
Figure PCTCN2020122997-appb-000059
和
Figure PCTCN2020122997-appb-000060
表示处理时间，以物理时间单元为单位。
附记16.根据附记1至10任一项所述的方法，其中，所述终端设备在时间单元m接收到指示了业务周期为P rsvp_RX的第一边链路控制信息，且基于该第一边链路控制信息获得的参考信号接收功率(RSRP)高于RSRP门限，所述终端设备将如下的候选资源排除：
基于所述第一边链路控制信息或基于能够在时间单元m+q×P rsvp_RX接收到的第二边链路控制信息确定的时频资源与所述候选资源
Figure PCTCN2020122997-appb-000061
重叠，
其中，j＝0,1,…,C resel-1，q＝1,2,…,Q，C resel表示所述终端设备需要发送的时间单元个数，如果P rsvp_RX＜P step，并且时间单元m位于参考时间段内，则
Figure PCTCN2020122997-appb-000062
否则Q＝1，P step为感知时间段的最后一个时间单元和选择时间段的最后一个时间单元之间的时间间隔，P rsvp_TX表示所述终端设备需要发送的业务周期，R x,y表示位于时间单元y的、频率最低子信道为x的若干连续子信道。
附记17.根据附记1至16任一项所述的方法，其中，所述方法还包括：
所述终端设备确定是否使能所述第一监听时间段；以及
在使能所述第一监听时间段的情况下，在所述第一监听时间段内监听所述边链路控制信息；在不使能所述第一监听时间段的情况下，不在所述第一监听时间段内监听所述边链路控制信息。
附记18.根据附记17所述的方法，其中，所述终端设备在所述第一监听时间段之前接收到周期为所述业务周期的周期性业务的情况下，使能所述第一监听时间段；在所述第一监听时间段之前没有接收到周期为所述业务周期的周期性业务的情况下，不使能所述第一监听时间段。
附记19.一种终端设备，包括存储器和处理器，所述存储器存储有计算机程序，所述处理器被配置为执行所述计算机程序而实现如附记1至18任一项所述的边链路资源选择方法。

Claims (20)

  1. 一种边链路资源选择装置，包括：
    确定部，其至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；
    监听部，其在所述第一监听时间段内监听边链路控制信息；以及
    排除部，其根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
  2. 根据权利要求1所述的装置，其中，所述第一监听时间段包括时间单元x；
    x＝y-k×P；当y≤x′+(α-1)×P时，k＝α-1；否则，
    Figure PCTCN2020122997-appb-100001
    x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
  3. 根据权利要求1所述的装置，其中，所述第一监听时间段包括时间单元x；
    Figure PCTCN2020122997-appb-100002
    mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
  4. 根据权利要求1所述的装置，其中，所述第一监听时间段包括时间单元x；
    Figure PCTCN2020122997-appb-100003
    mod()表示取模运算，x’表示所述感知时间段的最后一个时间单元，P表示所述业务周期，y’表示所述选择时间段的最后一个时间单元，y表示所述选择时间段中的时间单元。
  5. 根据权利要求1所述的装置，其中，所述确定部用于：
    确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；
    根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到一个或多个周期时间段；以及
    将所述参考时间段和所述一个或多个周期时间段至少部分重叠的时间段确定为所述第一监听时间段。
  6. 根据权利要求1所述的装置，其中，所述确定部用于：
    确定参考时间段，所述参考时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述参考时间段的时间长度等于所述业务周期；
    根据所述业务周期将所述选择时间段沿逆时间方向周期性重复一次或多次，以得到与所述参考时间段至少部分重叠的最后一个周期时间段；所述最后一个周期时间段中沿所述参考时间段的最后一个时间单元被分为第一时间段和第二时间段；以及
    将所述第二时间段沿逆时间方向偏移所述业务周期的时间长度，并将所述第一时间段和偏移后的所述第二时间段确定为所述第一监听时间段。
  7. 根据权利要求1所述的装置，其中，所述监听部还用于：在第二监听时间段与所述第一监听时间段形成的并集内监听边链路控制信息；其中，所述第二监听时间段的最后一个时间单元为所述感知时间段的最后一个时间单元，所述第二监听时间段的时间长度等于所述业务周期或者所述选择时间段的时间长度。
  8. 根据权利要求1所述的装置，其中，所述业务周期小于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。
  9. 根据权利要求1所述的装置，其中，所述第一监听时间段的时间长度小于或等于所述业务周期。
  10. 根据权利要求1所述的装置，其中，所述选择时间段的时间长度小于所述业务周期。
  11. 根据权利要求1所述的装置，其中，所述第一监听时间段包括时间单元x；x＝y-P，P表示所述业务周期，y表示所述选择时间段中的时间单元。
  12. 根据权利要求11所述的装置，其中，所述业务周期大于或等于所述感知时间段的最后一个时间单元和所述选择时间段的最后一个时间单元之间的时间间隔。
  13. 根据权利要求1所述的装置，其中，所述业务周期为终端设备想要避开的业务的周期，所述业务周期小于100毫秒。
  14. 根据权利要求1所述的装置，其中，所述感知时间段的最后一个时间单元是以下之一：
    时间单元y′-P 100，其中y′表示所述选择时间段的最后一个时间单元，P 100表示100毫秒包括的时间单元个数；
    或者，时间上位于物理时间单元
    Figure PCTCN2020122997-appb-100004
    之前的最后一个时间单元，其中n表示高层触发资源选择的物理时间单元，
    Figure PCTCN2020122997-appb-100005
    表示处理时间，以物理时间单元为单位；
    或者，时间上位于物理时间单元
    Figure PCTCN2020122997-appb-100006
    之前的最后一个时间单元，其中z′表示所述选择时间段的第一个时间单元，
    Figure PCTCN2020122997-appb-100007
    表示选择时间段的第一个物理时间单元，T表示处理时间，以物理时间单元为单位。
  15. 根据权利要求1所述的装置，其中，
    Figure PCTCN2020122997-appb-100008
    或者
    Figure PCTCN2020122997-appb-100009
    其中
    Figure PCTCN2020122997-appb-100010
    和
    Figure PCTCN2020122997-appb-100011
    表示处理时间，以物理时间单元为单位。
  16. 根据权利要求1所述的装置，其中，在时间单元m接收到指示了业务周期为P rsvp_RX的第一边链路控制信息，且基于该第一边链路控制信息获得的参考信号接收功率高于门限，
    所述排除部将如下的候选资源排除：
    基于所述第一边链路控制信息或基于能够在时间单元m+q×P rsvp_RX接收到的第二边链路控制信息确定的时频资源与所述候选资源
    Figure PCTCN2020122997-appb-100012
    重叠，
    其中，j＝0,1,…,C resel-1，q＝1,2,…,Q，C resel表示终端设备需要发送的时间单元个数，如果P rsvp_RX＜P step，并且时间单元m位于参考时间段内，则
    Figure PCTCN2020122997-appb-100013
    否则Q＝1，P step为感知时间段的最后一个时间单元和选择时间段的最后一个时间单元之间的时间间隔，P rsvp_TX表示所述终端设备需要发送的业务周期，R x,y表示位于时间单元y的、频率最低子信道为x的若干连续子信道。
  17. 根据权利要求1所述的装置，其中，所述确定部还用于：确定是否使能所述第一监听时间段；以及
    在使能所述第一监听时间段的情况下，在所述第一监听时间段内监听所述边链路控制信息；在不使能所述第一监听时间段的情况下，不在所述第一监听时间段内监听所述边链路控制信息。
  18. 根据权利要求17所述的装置，其中，在所述第一监听时间段之前接收到周期为所述业务周期的周期性业务的情况下，使能所述第一监听时间段；在所述第一监听时间段之前没有接收到周期为所述业务周期的周期性业务的情况下，不使能所述第一监听时间段。
  19. 一种边链路资源选择方法，包括：
    终端设备至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后 一个时间单元确定第一监听时间段；
    在所述第一监听时间段内监听边链路控制信息；以及
    根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
  20. 一种通信系统，包括：
    终端设备，其至少根据业务周期、感知时间段的最后一个时间单元和选择时间段的最后一个时间单元确定第一监听时间段；在所述第一监听时间段内监听边链路控制信息；以及根据接收到的所述边链路控制信息对所述选择时间段内的候选资源进行资源排除。
PCT/CN2020/122997 2020-10-22 2020-10-22 边链路资源选择方法以及装置 WO2022082670A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2023523657A JP2023545848A (ja) 2020-10-22 2020-10-22 サイドリンクリソース選択方法及び装置
EP20958252.7A EP4236516A4 (en) 2020-10-22 2020-10-22 METHOD AND DEVICE FOR SELECTING SIDELINK RESOURCES
PCT/CN2020/122997 WO2022082670A1 (zh) 2020-10-22 2020-10-22 边链路资源选择方法以及装置
CN202080105702.XA CN116326009A (zh) 2020-10-22 2020-10-22 边链路资源选择方法以及装置
US18/134,622 US20230262661A1 (en) 2020-10-22 2023-04-14 Method and apparatus for selecting sidelink resources

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/122997 WO2022082670A1 (zh) 2020-10-22 2020-10-22 边链路资源选择方法以及装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/134,622 Continuation US20230262661A1 (en) 2020-10-22 2023-04-14 Method and apparatus for selecting sidelink resources

Publications (1)

Publication Number Publication Date
WO2022082670A1 true WO2022082670A1 (zh) 2022-04-28

Family

ID=81291416

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/122997 WO2022082670A1 (zh) 2020-10-22 2020-10-22 边链路资源选择方法以及装置

Country Status (5)

Country Link
US (1) US20230262661A1 (zh)
EP (1) EP4236516A4 (zh)
JP (1) JP2023545848A (zh)
CN (1) CN116326009A (zh)
WO (1) WO2022082670A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115459867A (zh) * 2022-07-25 2022-12-09 中国电子科技集团公司第二十九研究所 一种频谱监测资源分配优化方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109803321A (zh) * 2017-11-17 2019-05-24 电信科学技术研究院 一种多业务下的资源选择方法及终端
US20200053835A1 (en) * 2018-08-08 2020-02-13 Idac Holdings, Inc. Uu interface enhancement for nr v2x
CN111436035A (zh) * 2019-01-11 2020-07-21 展讯半导体(南京)有限公司 5g车联网中传输样式的选择方法、装置及用户设备
CN111586722A (zh) * 2019-02-15 2020-08-25 大唐高鸿数据网络技术股份有限公司 一种资源选择方法及终端

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019064465A1 (ja) * 2017-09-28 2019-04-04 株式会社Ｎｔｔドコモ ユーザ装置、及びリソース選択方法
US20200029340A1 (en) * 2018-07-19 2020-01-23 Samsung Electronics Co., Ltd. Method and apparatus for nr v2x resource selection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109803321A (zh) * 2017-11-17 2019-05-24 电信科学技术研究院 一种多业务下的资源选择方法及终端
US20200053835A1 (en) * 2018-08-08 2020-02-13 Idac Holdings, Inc. Uu interface enhancement for nr v2x
CN111436035A (zh) * 2019-01-11 2020-07-21 展讯半导体(南京)有限公司 5g车联网中传输样式的选择方法、装置及用户设备
CN111586722A (zh) * 2019-02-15 2020-08-25 大唐高鸿数据网络技术股份有限公司 一种资源选择方法及终端

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
3GPP TS 36.213
See also references of EP4236516A4

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115459867A (zh) * 2022-07-25 2022-12-09 中国电子科技集团公司第二十九研究所 一种频谱监测资源分配优化方法
CN115459867B (zh) * 2022-07-25 2024-06-04 中国电子科技集团公司第二十九研究所 一种频谱监测资源分配优化方法

Also Published As

Publication number Publication date
EP4236516A4 (en) 2023-11-22
US20230262661A1 (en) 2023-08-17
CN116326009A (zh) 2023-06-23
JP2023545848A (ja) 2023-10-31
EP4236516A1 (en) 2023-08-30

Similar Documents

Publication Publication Date Title
WO2019091098A1 (zh) D2d通信中资源配置的方法、终端设备和网络设备
WO2019028759A1 (zh) 设备对设备通信的方法和终端设备
JP2019536308A (ja) 無線通信システムにおけるダウンリンク制御チャネルの送信および検出のための方法およびデバイス
WO2018120064A1 (zh) 抑制干扰信息的传输装置、方法以及通信系统
WO2018120065A1 (zh) 动态时分双工的设置装置、方法以及通信系统
WO2022027500A1 (zh) 信息发送方法，资源确定方法以及装置
WO2019051784A1 (zh) 载波选取的方法和通信设备
WO2022077384A1 (zh) 资源选择方法以及装置
JP2021533603A (ja) コンテンションウィンドウの調整方法、装置及び通信システム
WO2021031042A1 (zh) 信号发送和接收方法以及装置
CN105474736B (zh) 传输数据的方法及装置
US20240015702A1 (en) Method for reselecting sidelink resource and apparatus for the same
WO2022082670A1 (zh) 边链路资源选择方法以及装置
WO2020198981A1 (zh) 信号感知方法、信号发送方法以及装置
WO2021248421A1 (zh) 边链路资源选择方法以及装置
WO2021226971A1 (zh) 数据发送方法，资源配置方法以及装置
WO2019034101A1 (zh) 网络配置参数的有效取值确定方法、用户终端、基站以及网络配置参数的有效取值确定系统
WO2022027509A1 (zh) 上行数据的发送方法、装置和系统
WO2023010422A1 (zh) 边链路协作信息的指示和接收装置以及方法
WO2022027510A1 (zh) 资源指示和资源选择方法以及装置
WO2023077365A1 (zh) 边链路资源的排除装置以及方法
WO2022082672A1 (zh) 资源选择方法以及装置
WO2022236633A1 (zh) 边链路资源的重选方法及装置
WO2022077376A1 (zh) 资源选择和资源指示方法及装置
WO2022236587A1 (zh) 设备间协作方法、资源选择方法以及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20958252

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023523657

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020958252

Country of ref document: EP

Effective date: 20230522