WO2019174453A1 - 信息发送的方法和装置 - Google Patents

信息发送的方法和装置 Download PDF

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Publication number
WO2019174453A1
WO2019174453A1 PCT/CN2019/076014 CN2019076014W WO2019174453A1 WO 2019174453 A1 WO2019174453 A1 WO 2019174453A1 CN 2019076014 W CN2019076014 W CN 2019076014W WO 2019174453 A1 WO2019174453 A1 WO 2019174453A1
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WIPO (PCT)
Prior art keywords
time period
frequency domain
domain resource
terminal device
sub
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PCT/CN2019/076014
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English (en)
French (fr)
Inventor
苏宏家
向铮铮
张锦芳
罗俊
卢磊
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华为技术有限公司
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Publication of WO2019174453A1 publication Critical patent/WO2019174453A1/zh

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    • 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
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting information.
  • Vehicle-To-Everything refers to the interaction of vehicles with the outside world, including Vehicle-To-Vehicle (V2V), Vehicle-to-Infrastructure (V2I), and vehicles to pedestrians (Vehicle-To-Everything).
  • Vehicle-To-Person, V2P which is the foundation and key technology for smart cars, autonomous driving and intelligent transportation systems in the future.
  • each terminal device in the vehicle network can also communicate directly through the side link (SideLink, SL), that is, the data of the communication parties does not need to pass through the base station. Forward.
  • SideLink Side Link
  • the side link communication includes two communication modes: the first communication mode is based on the side link communication scheduled by the base station, and the terminal device transmits the control information and data of the side link communication on the scheduled radio resource according to the scheduling information of the base station. It is called mode 3 (mode3) working mode; the second communication mode is that the terminal device monitors the side link communication resource pool, and then selects the radio resource used for the side link communication from the monitored available radio resources, and selects the radio resource.
  • the control information and data are sent on the radio resource, which is called mode 4 mode.
  • the edge link communication resource pool includes a plurality of radio resources, and the terminal device occupies one or more consecutive radio resources in the frequency domain for transmitting control information and data through the side link.
  • the terminal device working in Mode4 selects to send a certain size of the transmission time period window based on the history monitoring (or sensing, Sensing) information, and selects a time period to send information (such as control information and/or data) in the transmission time period window. .
  • Two or more terminal devices may select the same frequency domain resource on the same time period. At this point, the information may fail to be sent due to a conflict.
  • the transmission time window is smaller and the collision probability is greater.
  • the embodiment of the invention describes a method and a device for transmitting information, which are used to solve the problem that the collision probability of transmitting information directly using the frequency domain resource is large and the delay is large.
  • the embodiment of the present invention provides a method for sending information, where the method includes: determining, by a first terminal device, a sending time period, where the sending time period includes a first time period, and the length of the first time period is less than The length of the transmission time period, the first time period includes N sub-time segments, N is a positive integer, and N>1; the first terminal device selects a target sub-time period, wherein the target sub-time period is N sub-time periods The first terminal device sends indication information in the target sub-time period, where the indication information is used to indicate that the target frequency domain resource is occupied, where the target frequency domain resource is located in the sending time period.
  • the first terminal device may send the indication information that the target frequency domain resource is occupied in the first time period, so as to reduce the probability of collision with other terminal devices on the same frequency domain resource, thereby reducing the collision zone. The delay.
  • the first time period includes a first part and a second part; the first part includes N1 sub-time periods for monitoring and/or transmitting indication information that the frequency domain resource is occupied, where N1 is a positive integer. And N1 is smaller than N, the target sub-period is located in the first part; and the second part includes N2 sub-periods for automatic gain control (AGC), N1+N2 ⁇ N. That is, the first time period is used for AGC, and is also used as sending indication information, thereby ensuring that resources are fully utilized and that more resources are available for information transmission in the second time period.
  • AGC automatic gain control
  • the sending, by the first terminal device, the indication information in the target sub-period includes: transmitting, by the first terminal device, the indication information on the frequency domain resource corresponding to the target frequency domain resource in the target sub-time period. That is to say, the terminal device sends an indication message on the first frequency domain resource of the target sub-time period, indicating that the second frequency domain resource of the second time period corresponding thereto is occupied, and the indication information is sent and
  • the receiving mode is very simple. After listening to the indication information, other terminal devices no longer use the second frequency domain resource in the current time period, thereby reducing the collision probability.
  • the time period further includes: a second time period, the second time period is located after the first time period; the first terminal device sends an indication in the target sub-time period After the information, the method further includes: the first terminal device transmitting information on the target frequency domain resource of the second time period.
  • the method before the first terminal device sends the indication information that the target frequency domain resource is occupied, the method further includes: the first terminal device selects one frequency domain resource as the target from the available frequency domain resource set in the sending time period. And the first terminal device monitors the indication information sent by the other terminal device on the first frequency domain resource corresponding to the target frequency domain resource on the at least one sub-time period before the target sub-time period. First, a target frequency domain resource is selected, and then the target frequency domain resource is monitored to be occupied by other terminal devices, thereby further simplifying the complexity of the first terminal device monitoring, that is, only one frequency domain resource needs to be monitored.
  • the first terminal device monitors the indication information that the target frequency domain resource is occupied by the other terminal device on the first frequency domain resource corresponding to the target frequency domain resource, the first terminal device is not in use. Transmitting information on the target frequency domain resource of the second time period; and/or if the first terminal device does not listen to the target frequency domain resource sent by the other terminal device on the first frequency domain resource corresponding to the target frequency domain resource. The occupied terminal information is sent by the first terminal device on the target frequency domain resource of the second time period.
  • the method of first listening to the indication information and determining whether to send the indication information according to whether the indication information is monitored or not can effectively reduce the collision probability between different terminal devices.
  • the first terminal device starts a counter, and the counter initial value C is randomly selected or pre-configured by the first terminal device, C is a natural number and 0 ⁇ C ⁇ N1; a sub-period, and in the sub-period, the first terminal device does not monitor that the target frequency domain resource sent by the other terminal device is occupied on the first frequency domain resource corresponding to the target frequency domain resource. Instructing the information, the counter is decremented by one; the corresponding sub-time period when the first terminal device reduces the counter to 0 is determined as the target sub-period.
  • the first terminal device starts a counter, the counter initial value is 0; each time period elapsed, and in the sub-period, the first terminal device is in the If the indication information sent by the other terminal device is not detected on the first frequency domain resource corresponding to the target frequency domain resource, the counter is incremented by 1; the first terminal device determines the corresponding sub-time period when the counter is added to C.
  • C is randomly selected or pre-configured by the first terminal device, C is a natural number and 0 ⁇ C ⁇ N1.
  • the method before the first terminal device sends the indication information that the target frequency domain resource is occupied, the method further includes: at least one sub-time period before the target sub-time period of the first terminal device, at the sending time
  • the indication information sent by other terminal devices is monitored in the set of available frequency domain resources in the segment. By monitoring more frequency domain resources, frequency domain resources that are not occupied by other terminal devices can be obtained with greater probability, and information transmission delay is reduced.
  • the first terminal device selects one frequency domain resource from the candidate frequency domain resource set as the target frequency domain resource, and the candidate frequency domain resource set is a subset of the available frequency domain resources, and does not include the first A frequency domain resource indicated by the indication information sent by another terminal device that is monitored by the terminal device.
  • the first terminal device before the sending time period, further includes: the first terminal device determines a sending time period window, wherein the sending time period window includes at least one time period, and the sending time period belongs to the sending time period. a time period in the window; the first terminal device selects a time period from the time period window as the transmission time period. By determining the time period, the time delay of the information can be guaranteed to meet the service quality requirements of the service.
  • the first terminal device determines the time period window according to the quality of service requirement of the information to be sent, wherein the quality of service requirement includes a delay requirement. In combination with the quality of service requirements, choose the appropriate time window to ensure the delay of the information.
  • the first terminal device before the determining, by the first terminal device, the target sub-time period, the first terminal device monitors the at least one frequency domain resource in the M time periods before the time period window, and determines the time period.
  • the time period is any of the following: time slot, mini-slot, sub-frame, and transmission time interval (TTI).
  • TTI transmission time interval
  • the first time period includes X first OFDM symbols, where X is a positive integer; the second time period includes Y second OFDM symbols, where Y is a positive integer.
  • the first OFDM symbol is the same as the second OFDM symbol subcarrier spacing; or the first OFDM symbol is different from the second OFDM symbol subcarrier spacing.
  • an embodiment of the present invention provides an apparatus for transmitting information, including a processor and a transceiver coupled to the processor.
  • the transceiver is configured to send or receive a signal;
  • the processor is configured to determine a sending time period, where the sending time period includes a first time period, and a length of the first time period is less than the sending time period Length, the first time period includes N sub-time segments, N is a positive integer, and N>1;
  • the processor is further configured to select a target sub-time period, wherein the target sub-time period is N sub-times One of the segments;
  • the processor is further configured to send, by the transceiver, the indication information in the target sub-period, the indication information is used to indicate that the target frequency domain resource is occupied, where the target frequency domain resource is located The sending time period.
  • the first time period includes a first part and a second part; the first part includes N1 sub-time periods for monitoring and/or transmitting indication information that frequency domain resources are occupied, where N1 A positive integer, and N1 is smaller than the N, the target sub-period is located in the first portion; the second portion includes N2 sub-periods for automatic gain control, N1+N2 ⁇ N.
  • the sending the indication information in the target sub-period includes: the processor, configured to, by the transceiver, the target frequency domain resource in the target sub-period The indication information is sent on the corresponding frequency domain resource.
  • the time period further includes: a second time period, the second time period is located after the first time period; and the processor sends indication information in the target sub-time period Then, it is further configured to send information on the target frequency domain resource of the second time period.
  • the method before the sending the indication information that the target frequency domain resource is occupied, the method further includes: the processor, configured to select one frequency from the available frequency domain resource set in the sending time period a domain resource as a target frequency domain resource; the processor, configured to, by the transceiver, in a frequency domain corresponding to the target frequency domain resource on at least one sub-time period preceding the target sub-period The resource listens to the indication information sent by other terminal devices.
  • the processor is configured to determine, if the indication information sent by another terminal device is monitored on the frequency domain resource corresponding to the target frequency domain resource, not in the second time period. Transmitting information on the target frequency domain resource; and/or the processor, configured to determine, if the indication information sent by another terminal device is not monitored on the frequency domain resource corresponding to the target frequency domain resource, Transmitting information on the target frequency domain resource of the second time period.
  • the processor is configured to start a counter, where the initial value C of the counter is randomly selected or pre-configured by the first terminal device, C is a natural number and 0 ⁇ C ⁇ N1;
  • the processor is further configured to: when the sub-time period elapses, the first terminal device does not monitor the sending of the other terminal device on the frequency domain resource corresponding to the target frequency domain resource. Instructing information, the counter is decremented by one; the processor is further configured to reduce the corresponding sub-period of time when the counter is reduced to 0 as the target sub-period.
  • the processor is configured to start a counter, the counter is initially 0; each time a sub-period is passed, and in the sub-period, the first terminal device is in the If the indication information sent by the other terminal device is not monitored on the frequency domain resource corresponding to the target frequency domain resource, the counter is incremented by one; the processor is further configured to add the counter to the corresponding sub-time period when C is used. Determined as the target sub-period, where C is randomly selected or pre-configured by the first terminal device, C is a natural number and 0 ⁇ C ⁇ N1.
  • the method before transmitting the indication information that the target frequency domain resource is occupied, the method further includes: the processor, configured to pass, by the transceiver, at least one of the target sub-time periods In the sub-period, the indication information sent by other terminal devices is monitored in the frequency domain resource set in the sending time period.
  • the processor is configured to select one frequency domain resource from the candidate frequency domain resource set as a target frequency domain resource, where the candidate frequency domain resource set is the available frequency domain resource. And a subset of the frequency domain resources occupied by the indication information sent by the other terminal device that is monitored by the first terminal device.
  • the method before the sending time period, further includes: the processor, configured to determine a sending time period window, wherein the sending time period window includes at least one time period, and the sending time The segment belongs to a time period in the sending time period window; the processor is further configured to select a time period from the time period window as the sending time period.
  • the processor is configured to determine the time period window according to a quality of service requirement of the information to be sent, where the quality of service requirement includes a delay requirement.
  • the method before determining the target sub-time period, further includes: the processor, by using, the at least one frequency domain in the M time periods before the time period window by the transceiver The resource is monitored to determine the set of available frequency domain resources in the time period, where M is a positive integer.
  • the time period is any of the following: time slots, mini-slots, subframes, and transmission time intervals (TTIs).
  • TTIs transmission time intervals
  • the first time period includes X first OFDM symbols, where X is a positive integer; the second time period includes Y second OFDM symbols, where Y is a positive integer.
  • the first OFDM symbol is the same as the second OFDM symbol subcarrier spacing; or the first OFDM symbol is different from the second OFDM symbol subcarrier spacing.
  • an embodiment of the present invention provides a processor readable storage medium, including instructions that, when executed on a processor, cause the processor to perform the methods in various embodiments of the present invention.
  • an embodiment of the present invention provides a communication device, where the communication device includes a processor and a memory coupled to the processor, the processor includes an input and output interface, and the input and output interface is configured to send a signal and A signal is received, the memory is for storing instructions, and the processor is operative to read and execute instructions in the memory to control the communication device to perform the methods in various embodiments of the present invention.
  • FIG. 1 is a schematic diagram of a wireless communication system applied to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing the possible structure of the terminal device in the above wireless communication system.
  • FIG. 3 is a schematic diagram showing the timing relationship of information transmission.
  • FIG. 4 is a schematic diagram showing the division of the time period structure in the embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of a method for sending information according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart diagram of another method for sending information according to an embodiment of the present invention.
  • the present invention is applicable to wireless communication systems.
  • Long Term Evolution (LTE) device to device (D2D) communication enhanced D2D communication
  • vehicle to everything communication including vehicle to vehicle (V2V), Communication to Pedestrian (V2P), Vehicle to Infrastructure (V2I), communication system based on side link communication in 5G communication system, etc.
  • LTE Long Term Evolution
  • D2D device to device
  • V2V vehicle to everything communication
  • V2V vehicle to vehicle
  • V2P Communication to Pedestrian
  • V2I Vehicle to Infrastructure
  • the embodiment of the present invention is exemplified by the V2V communication in the 5G communication system, and does not constitute a limitation of the technical solution provided by the embodiment of the present invention.
  • Those skilled in the art may know that with the emergence of a new service scenario and the evolution of the network architecture, The technical solutions provided by the embodiments of the invention are equally applicable to similar technical problems.
  • the edge link communication technology is a kind of end-to-end direct communication technology, and the biggest difference from the traditional cellular communication technology is that the terminal device and the terminal device do not need the transfer of the base station directly through the side link communication. Communication can be performed, and the base station can perform resource configuration, scheduling, coordination, and the like to assist the terminal devices to communicate through the side link.
  • FIG. 1 shows an application scenario of an embodiment of the present invention, which includes a network device 101 and terminal devices 111-114 (for simplicity, only four terminal devices are shown in the figure, but this does not mean It can only be 4 terminal devices. In fact, there can be any number of terminal devices). Some or all of the terminal devices 111-114 may be located within the coverage of the network device 101 or may be located outside the coverage of the network device 101.
  • Network device 101 communicates with one or more of terminal devices 111-114 over the air interface (as in LTE and 5G systems, the air interface is a Uu interface).
  • terminal device 112 communicates with network device 101 over air interface 131.
  • the terminal devices 111-114 can also communicate through the side link (as in LTE, the side link interface is a PC5 interface). As shown in FIG. 1, the terminal device 111 communicates with the terminal device 112 via the side link 121, and the terminal device 113 communicates with the terminal device 114 via the side link 122. In another application scenario of the embodiment of the present invention, only terminal devices 111-114 may exist. At this time, the terminal devices 111 to 114 can communicate through the side link (as in the LTE, the side link interface is the PC5 interface).
  • Mode3 working mode When communicating between the terminal devices through the side link, there are two working modes, one is the Mode3 working mode, and the other is the Mode4 working mode.
  • the terminal device requests the network device to allocate the radio resource of the side link communication, and sends the control information and data of the side link communication on the allocated radio resource according to the scheduling information of the network device, as shown in FIG.
  • the terminal device 111 sends a scheduling request to the network device to request the network device 101 to allocate the side link communication resources for the terminal device 111.
  • the network device 101 allocates the terminal device 111.
  • the resource is notified to the terminal device 111 by the scheduling information, and the terminal device 111 transmits the control information and/or data to the other terminal device using the resource.
  • the terminal device monitors the edge link communication resource pool, and then selects one or more radio resources used for the side link communication from the monitored at least one available radio resource, and sends the selected one of the radio resources on the selected resource. Control information and data.
  • the edge link communication resource pool includes a plurality of radio resources, and the terminal device sends control information and data one or more radio resources occupied by the terminal device each time, and the one or more radio resources are continuous in the frequency domain.
  • the terminal devices 113 and 114 shown in FIG. 1 perform side link communication
  • the edge link communication resource pool includes a plurality of radio resources, and the terminal device transmits control information and data using consecutive radio resources in one or more of the frequency domains.
  • a network device (for example, the network device 101) is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function for a terminal device.
  • the network device may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like.
  • the network device may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB, NB) in WCDMA, or may be an evolved Node B (eNB or e in LTE or eLTE).
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • eNB evolved Node B
  • a next-generation mobile network such as a base station gNB ((next) generation NodeB) in 5G (fifth generation), or a Road Side Unit (RSU) in V2X communication, or the above network device Or a chip or system on chip (SOC) inside the base station.
  • gNB next generation NodeB
  • RSU Road Side Unit
  • SOC system on chip
  • the terminal device may also be referred to as a user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), etc., and the terminal device may be connected to the wireless access network device.
  • the terminal device Communicate with one or more core network devices.
  • the terminal device is a wireless transceiver function that can be deployed on land, indoors or outdoors, handheld or on-board, or deployed on water (such as ships). ); can also be deployed in the air (such as airplanes, balloons, satellites, etc.).
  • the terminal device may be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( Wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation safety A wireless terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • a terminal device or a UE For convenience of description, in the present application, it is simply referred to as a terminal device or a UE.
  • FIG. 2 shows a wireless communication device according to an embodiment of the present invention.
  • the wireless communication device can be used as the terminal devices 111-114 or applied to the devices in the terminal devices 111-114.
  • the wireless communication device shown in FIG. 2 will be described as an example of the terminal device.
  • the terminal device is capable of performing the method provided by the embodiment of the present invention.
  • the terminal device may be any one of the four terminal devices 111 to 114.
  • the terminal device includes a transceiver 201, a memory 203, and a processor 204 for implementing a wireless communication function.
  • the transceiver 201 can be used to support the transmission and reception of information between the terminal devices 111-114 and the network device 101.
  • the downlink radio frequency signal from the network device is received via the antenna, coordinated by the transceiver 201, and the baseband signal is extracted and output to the processor 204 for processing to recover the service data and/or information sent by the network device. Order information.
  • the baseband signal carrying the traffic data and/or signaling messages to be sent to the network device is modulated by the transceiver 201 to generate an uplink radio frequency signal and transmitted to the network device via the antenna.
  • the transceiver 201 can also be used to support the transmission and reception of information between the terminal devices 111-114.
  • the side link radio frequency signals from other terminal devices are received via the antenna, are adjusted by the transceiver 201, and the baseband signals are extracted and output to the processor 204 for processing to restore the service data sent by the other terminal devices. And / or signaling information.
  • the baseband signal carrying the service data and/or signaling message to be transmitted to other terminal devices is modulated by the transceiver 201 to generate the radio frequency signal of the side link and transmitted to other terminals via the antenna. device.
  • the transceiver 201 can include independent receiver and transmitter circuits, or can be integrated in the same circuit to implement transceiving functions.
  • Processor 204 can be a modem processor.
  • Processor 204 can include a baseband processor (BBP) that processes the digitized received signal to extract information or data bits carried in the signal.
  • BBP baseband processor
  • DSPs digital signal processors
  • ICs integrated circuits
  • processor 204 can include an encoder 2041, a modulator 2042, a decoder 2043, and a demodulator 2044.
  • the encoder 2041 is for encoding the signal to be transmitted.
  • the encoder 2041 can be configured to receive traffic data and/or signaling messages to be transmitted on the uplink (or on the side link) and process the traffic data and signaling messages (eg, format, encode, Or intertwined, etc.).
  • Modulator 2042 is used to modulate the output signal of encoder 2041.
  • the modulator can perform symbol mapping and/or modulation processing on the encoder's output signals (data and/or signaling) and provide output samples.
  • a demodulator 2044 is used to demodulate the input signal. For example, demodulator 2044 processes the input samples and provides symbol estimates.
  • the decoder 2043 is configured to decode the demodulated input signal. For example, the decoder 2043 de-interleaves, and/or decodes the demodulated input signal and outputs the decoded signal (data and/or signaling).
  • the processor 204 receives digitized data representative of voice, data or control information and processes the digitized data for transmission.
  • the processor 204 can support one or more of a plurality of wireless communication protocols of a plurality of communication systems, such as a Long Term Evolution (LTE) communication system, a New Radio (NR), and a universal mobile communication system ( Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA) and the like.
  • LTE Long Term Evolution
  • NR New Radio
  • UMTS Universal Mobile Telecommunications System
  • HSPA High Speed Packet Access
  • one or more memories may also be included in the processor 204.
  • the terminal device may further include an application processor 302 for generating the digitized data that can represent the voice, data, or control information.
  • Processor 204 and application processor 202 may be integrated into one processor chip.
  • the memory 203 is used to store program codes (sometimes referred to as programs, instructions, software, etc.) and/or data for supporting communication of the terminal device.
  • program codes sometimes referred to as programs, instructions, software, etc.
  • the memory 203 may include one or more storage units, for example, may be the storage unit inside the processor 204 or the application processor 202, or may be external storage independent of the processor 204 or the application processor 202.
  • the unit or may also be a component that includes a processor 204 or a memory unit internal to the application processor 202 and an external storage unit that is separate from the processor 204 or the application processor 202.
  • Processor 204 can be a different type of processor. For example, it can be implemented in a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array ( Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, other integrated circuit, or any combination thereof.
  • the processor 204 can implement or perform various exemplary logical blocks, modules and circuits described in connection with the disclosure of the embodiments of the invention.
  • the processor may also be a combination of computing function devices, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, or a system-on-a-chip (SOC) or the like.
  • the terminal device operating in Mode4 selects a transmission time period window based on the history sensing information or the monitoring result, and selects a time period to transmit control information and/or data in the transmission time period window.
  • control information and/or data are collectively referred to as information.
  • the terminal device listens to the time period n-1000 to the time period n-1, and selects the transmission time period window as n+T1 to n+T2 according to the monitoring result, and then selects n from the transmission time period window. +T1+2 sends information as the transmission time period n+Tselect.
  • the transmission time window cannot be too large. Therefore, two or more terminal devices may select the same frequency domain resource on the same transmission time period within the transmission time period window. At this point, the message may fail because of a conflict. For services that require urgent time delays, the transmission time window is smaller and the collision probability is greater.
  • an embodiment of the present invention provides a method for sending information.
  • the sending time period includes at least a first time period, and the length of the first time period is less than the length of the sending time period.
  • the first time period contains a plurality of sub-time periods.
  • the first terminal device may select a sending time period window according to the historical listening information (or the monitoring result).
  • the first terminal device selects a transmission time period in the transmission time period window.
  • the first terminal device selects a target sub-period from the first time period of the selected transmission time period.
  • the first terminal device may listen for at least one sub-period of time before the target sub-period in the selected first time period.
  • the first terminal device can monitor indication information that the frequency domain resources that are sent by other terminal devices are occupied in each sub-time period that is monitored. If the indication information is not monitored or the indication information is not required, the first terminal device sends indication information that the frequency domain resource is occupied in the target sub-time period, where the indication information is used to indicate that the target frequency domain resource in the target time period is occupied. . After the first terminal device sends the indication information that the frequency domain resource is occupied, in the second time period, the information may be sent by using the target frequency domain resource.
  • the method provided by the embodiment of the present invention by dividing the transmission time period into two parts and subdividing the first time period into multiple sub-time periods, multiple terminal devices may have the opportunity to select different sub-time period transmission frequencies. Domain resource occupation indication information.
  • the method provided by the embodiment of the present invention can effectively reduce the collision probability between the terminal devices, thereby reducing the delay, compared to the terminal device directly transmitting the information in the frequency domain resource in the selected transmission time period.
  • the structure of the time domain in the time domain and the structure of the frequency domain resources included in the frequency domain are described below.
  • FIG. 4 is a schematic structural diagram of a transmission time period window and a transmission time period according to various embodiments of the present invention.
  • the time structure (time axis) is composed of a plurality of time segments that are consecutive in time.
  • a time period may specifically be a transmission time period as shown in FIG.
  • one transmission time period window includes one or more transmission time periods, and a box within the transmission time period window indicates a transmission time period. Any time period can be used as the sending time period.
  • a transmission time period may include the length of one or more slots, or may include the length of one or more mini-slots, or include the length of one or more sub-frames, or include one or more The length of the Transmission Time Interval (TTI), or one or more orthogonal frequency-division multiplexing (OFDM) symbols, is not limited in the embodiments of the present invention.
  • TTI Transmission Time Interval
  • OFDM orthogonal frequency-division multiplexing
  • one transmission time period may be one subframe (Subframe).
  • the length of one subframe is 1 millisecond (Millisecond, ms).
  • One subframe includes 2 slots.
  • One subframe includes 14 OFDM symbols (using a normal length cyclic prefix) or 12 OFDM symbols (using an extended length cyclic prefix).
  • the length of one TTI is equal to the length of one subframe, or the length of one slot, or shorter.
  • a transmission time period can include a mini time slot.
  • One mini slot includes one or more OFDM symbols. It should be noted that the transmission time period in the embodiments of the present invention is not limited to the LTE system or the 5G system, and may be applied to other systems, and the embodiments of the present invention are not limited.
  • a time slot is taken as an example to represent a time period.
  • the sub-period can also be referred to as a short time slot or a fast listening time slot.
  • the sending time period includes a first time period and a second time period.
  • the second time period is located after the first time period. That is, in chronological order, the first time period and the second time period, respectively.
  • the terminal device can monitor and/or transmit the frequency domain resource occupation indication information by using the first time period.
  • the terminal device can transmit information using the second time period.
  • the first time period and the second time period are described separately below.
  • a box filled with a horizontal line in the first time period represents a sub-period.
  • the first time period is used by the terminal device to monitor and/or send frequency domain resource occupation indication information. That is, the first time period is used for coordinating frequency domain resources of the current transmission time period among multiple terminal devices.
  • a sub-period may include one or more OFDM symbols.
  • the first time period includes X OFDM symbols and X is a positive integer.
  • the OFDM symbols included in the first time period are referred to as the first OFDM symbols in the embodiments of the present invention.
  • the first time period includes X first OFDM symbols.
  • a sub-period may be 9 microseconds ( ⁇ s) in length.
  • the length of the first period of time is not limited in the present invention.
  • the first time period includes a first portion and a second portion in the time domain.
  • the first part includes N1 sub-time segments for monitoring and/or transmitting frequency domain resource occupation indication information, where N1 is a positive integer and N1 ⁇ N.
  • the second part includes N2 sub-time periods for Automatic Gain Control (AGC), where N2 is a positive integer and N1+N2 ⁇ N.
  • AGC Automatic Gain Control
  • the N1 sub-time segments are used for the terminal device to monitor and/or transmit the frequency domain resource occupation indication information
  • the N2 sub-time segments are used for the AGC.
  • the second portion is located in the last N2 sub-period of the first time period or after the first portion. In another implementation, the second portion may be located at the first N2 sub-periods of the first time period or before the first portion.
  • the terminal device adjusts the received signal strength through the automatic gain control AGC to ensure the signal-to-noise ratio (SNR) required for the terminal device to correctly decode. For example, when the received signal strength is weak, the terminal device amplifies the signal strength through the AGC to raise the SNR to a reasonable range.
  • SNR signal-to-noise ratio
  • the terminal device When the received signal strength is strong, the terminal device reduces the received signal strength through the AGC to avoid the deterioration of the receiving performance caused by the signal strength exceeding a reasonable range. Since V2X communication may have one-to-many, many-to-one and many-to-many communication situations, and the distance between different terminal devices may be different, it is easy to cause the signal strength received by the terminal device to vary greatly. Therefore, the terminal device adjusts the received signal strength through the AGC to improve the reception performance.
  • the second time period includes one or more OFDM symbols.
  • the second time period includes Y OFDM symbols and Y is a positive integer.
  • the OFDM symbols included in the second time period in the embodiments of the present invention are the second OFDM symbols. That is, the second time period includes Y second OFDM symbols.
  • the subcarrier spacing of the first OFDM symbol and the second OFDM symbol may be the same or different.
  • the first OFDM symbol employs a subcarrier spacing equal to the subcarrier spacing employed by the second OFDM symbol.
  • the first OFDM symbol employs a subcarrier spacing greater than a subcarrier spacing employed by the second OFDM symbol.
  • the first OFDM symbol adopts a subcarrier spacing that is an integer multiple of a subcarrier spacing employed by the second OFDM symbol.
  • the first OFDM symbol and the second OFDM symbol may each adopt a subcarrier spacing of 15 KHz.
  • the first OFDM symbol uses a subcarrier spacing of 30 kHz, 60 kHz, or 120 kHz
  • the second OFDM symbol uses a 15 kHz subcarrier spacing.
  • Embodiments of the present invention do not limit the specific subcarrier spacing employed by the first OFDM symbol and the second OFDM symbol.
  • a time period includes a frequency domain resource set in the frequency domain, wherein the frequency domain resource set includes one or more frequency domain resources. If the frequency domain resource set includes multiple frequency domain resources, the multiple frequency domain resources are frequency division multiplexed.
  • a frequency domain resource occupies a certain width in the frequency domain. For example, one frequency domain resource may occupy 180 kHz, or one frequency domain resource may occupy one physical resource block (PRB), or one frequency domain resource may occupy six subcarriers.
  • the resources included in a frequency domain resource (such as a PRB, or a subcarrier) may be continuous or discrete in the frequency domain, which is not limited in the embodiment of the present invention.
  • the frequency domain resource may be a single-slot resource, or a radio resource, or a time-frequency resource.
  • the frequency domain resource set may specifically be a single time slot resource set, or a wireless resource set, or a time-frequency resource set.
  • the frequency domain resources may be used for a physical side link control channel (PSCCH) and/or a physical side link shared channel (PSSCH).
  • PSCCH physical side link control channel
  • PSSCH physical side link shared channel
  • one time slot includes a single time slot resource set including one or more single time slot resources.
  • Single slot resources are available for PSCCH and/or PSSCH. That is, a single slot resource can be used to transmit side link control signaling and/or data.
  • a portion of the frequency domain resource located in each sub-period of the first time period is referred to as a first frequency domain resource
  • a portion of the frequency domain resource located in the second time period is referred to as a second frequency domain resource. That is, the first frequency domain resource belongs to the frequency domain resource, and the first frequency domain resource is located in the first time period part of the frequency domain resource; the second frequency domain resource belongs to the frequency domain resource, and the second frequency domain resource is located in the frequency domain resource.
  • Each first frequency domain resource has a one-to-one correspondence with a second frequency domain resource.
  • the first frequency domain resource and the second frequency domain resource are the same resource (same frequency) in the frequency domain, but occupy different time in a time period.
  • the first frequency domain resource and the second frequency domain resource are different in the frequency domain, but have one-to-one correspondence.
  • the corresponding relationship between the first frequency domain resource and the second frequency domain resource includes: the first frequency domain resource 1 corresponds to the second frequency domain resource 2, the first frequency domain resource 2 corresponds to the second frequency domain resource 3, and the first frequency domain Resource 3 corresponds to the second frequency domain resource 1.
  • the correspondence between the first frequency domain resource and the second frequency domain resource may be configured by a network device or a high layer of the terminal device, or fixed in a protocol.
  • the first frequency domain resource is used to send indication information, indicating the occupied frequency domain resource, or indicating the occupied second frequency domain resource.
  • the second frequency domain resource is used to send information.
  • the parameter related to the time period structure includes at least one of the following: a length of the first time period and/or the second time period, a value of N, a length of the sub-time period, and a subcarrier of the first OFDM symbol used in the first time period.
  • the interval, the first OFDM symbol number included in the first time period, the first OFDM symbol number included in the sub-time period in the first time period, the value of N1 and/or N2, and the second time period includes the second The number of OFDM symbols, the subcarrier spacing used by the second OFDM symbol, the number of frequency domain resources included in one time period (ie, the first time period and the second time period), and the width of each frequency domain resource in the frequency domain. .
  • One or more of the parameters related to the time period structure may be protocol fixed, or configured by a higher layer of the terminal device, or controlled by the network device through physical layer control, Media Access Control (MAC) layer. Control signaling, or Radio Resource Control (RRC) layer signaling configuration.
  • the RRC layer signaling may be a dedicated RRC message or a system broadcast message.
  • the higher layer may be a MAC layer, an RRC layer or higher layer.
  • the terminal device listens to one or more sub-time periods in the first time period, and sends indication information on a first frequency domain resource of one of the sub-time periods.
  • the indication information is used to indicate that the second frequency domain resource corresponding to the first frequency domain resource is occupied.
  • the time period is a time slot, and the sub-carrier space (SCS) of the OFDM symbol is 15 kHz, and a normal cyclic prefix (Cyclic Prefix, CP) is used.
  • One slot includes 14 OFDM symbols.
  • the first time period includes a first OFDM symbol in a time slot. The first time period is used for monitoring and/or sending indication information, that is, indicating which frequency domain resource is occupied. Or, the first symbol is used for Fast Sensing. The first OFDM symbol can also be used for AGC.
  • the first OFDM symbol includes N Short-Sensing Slots (sSS), and N is a positive integer. That is, the first OFDM symbol includes N sub-time periods. Specifically, the first OFDM symbol includes ⁇ sSS 0 , sSS 1 , . . . , sSS N-1 ⁇ . among them L OFDM_symbol is the symbol length of the first OFDM, and L sSS is the length of one sSS. That is, N is L OFDM_symbol divided by L sSS and rounded down. sSSN-1 ⁇ L sSS length, i.e. the length of the last one may be greater than sSS L sSS.
  • sSS Short-Sensing Slots
  • N2 1 sSS is used for AGC, ie ⁇ sSS 0 , sSS 1 , ..., sSS 3 ⁇ for fast listening, and sSS 5 for AGC.
  • the first time period may include the first k OFDM symbols in the time slot, k is a positive integer, and k ⁇ 14.
  • the first time period includes N short listening slots.
  • the length of an sSS is correspondingly changed on the basis of the above description, and will not be described herein.
  • the terminal device in each embodiment of the present invention may be any one of the terminal devices 111 to 114 in FIG.
  • the following description will be made by taking the terminal device as the terminal device 111 as an example.
  • FIG. 5 is a schematic flowchart diagram of a method for sending information according to an embodiment of the present invention. The method comprises the following steps:
  • the terminal device determines a sending time period.
  • the terminal device Before determining the transmission time period, when the edge link data is reached in the time period n and needs to be sent to other terminal devices, the terminal device determines a transmission time period window according to the history monitoring information (or the monitoring result) and the high layer requirements [ n+T1,n+T2], where T1 and T2 are integers, and T1 ⁇ 0, T2 ⁇ 0.
  • the upper layer may be a MAC layer, a Radio Link Control (RLC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Service Data Adaptation Protocol (SADP) layer, and an RRC layer. Or higher.
  • the terminal device monitors at least one of the L time periods before the transmission time period window, or at least one of the L time periods before the time period n.
  • the terminal device monitors whether at least one frequency domain resource is occupied by another terminal device in at least one of the L time periods, or monitors whether at least one frequency domain resource is idle or busy, or monitors whether at least one frequency domain resource is available, or monitors Whether at least one frequency domain resource is an available frequency domain resource.
  • the terminal device determines whether the frequency domain resource is available by receiving the energy on the frequency domain resource. For example, the terminal device monitors the received signal energy or the received signal strength indication on the frequency domain resource (Received Signal Strength Indication, RSSI).
  • RSSI Receiveived Signal Strength Indication
  • the terminal device If the value is greater than or equal to a certain domain value, the terminal device considers that the frequency domain resource is unavailable, or considers that the frequency domain resource is busy, or considers that the frequency domain resource is used by other terminal devices. On the other hand, if the energy of the received signal is less than a certain domain value, the terminal device considers that the frequency domain resource is available, or considers that the frequency domain resource is idle, that is, the frequency domain resource is an available frequency domain resource, and one or more available frequency domains are available.
  • a collection of resource components is a collection of available frequency domain resources.
  • the terminal device determines the sending time period window according to the history monitoring information.
  • the terminal device selects a time period n+Tselect as the transmission time period from the transmission time period window.
  • Tselect is a natural number.
  • the terminal device can randomly select a time period as the transmission time period in the transmission time period window.
  • the terminal device may also select a time period as the transmission time period in the sending time period window according to a certain rule.
  • the rule may be fixed by the protocol, or configured by a higher layer of the terminal device, or controlled by the network device through physical layer control signaling, Media Access Control (MAC) layer control signaling, or radio resource control (Radio). Resource Control, RRC) layer signaling configuration.
  • MAC Media Access Control
  • Radio Radio Resource Control
  • the RRC layer signaling may be a dedicated RRC message or a system broadcast message.
  • the higher layer may be a MAC layer, an RRC layer or higher layer. The embodiment of the invention is not limited.
  • the processor 201 of the terminal device can be used to determine a transmission time period.
  • the terminal device selects a target frequency domain resource.
  • the terminal device may determine the available frequency domain resource set on the transmission time period n+Tselect according to the historical monitoring information.
  • the available frequency domain resource set includes J available frequency domain resources, and J is a natural number.
  • the set of available frequency domain resources includes J available single time slot resources.
  • the J available single time slot resources are represented as R 0,n+Tselect , R 1,n+Tselect ,..., R J-1,n+Tselect , respectively .
  • the number of frequency domain resources included in the frequency domain resource set available in one time period is less than or equal to the number of frequency domain resources included in the frequency domain resource set in the time period.
  • the transmission time period determined by the terminal device includes at least one available frequency domain resource. That is, the set of available frequency domain resources in the transmission time period determined by the terminal device is not empty.
  • the target frequency domain resource belongs to a set of available frequency domain resources.
  • the available frequency domain resource set mentioned in the embodiments of the present invention may be the second available in the second time period.
  • the determining, by the terminal device, the target frequency domain resource may be that the terminal device determines the target second frequency domain resource in the second time period.
  • the set of available frequency domain resources may also be a set of available second frequency domain resources in the first time period and the second time period, or a set of frequency domain resources in the transmission time period.
  • the determining, by the terminal device, the target frequency domain resource may be that the terminal device determines the target frequency domain resource in the first time period and the second time period, or is the target frequency domain resource in the sending time period. If the available frequency domain resource set in the transmission time period includes only one frequency domain resource, the terminal device determines that the frequency domain resource is the target frequency domain resource. If the available frequency domain resource set of the transmission time period includes two or more frequency domain resources, the terminal device selects one frequency domain resource from the available frequency domain resource set as the target frequency domain resource. The terminal device may randomly select one available frequency domain resource as the target frequency domain resource in the available frequency domain resource set. The terminal device may also select one available frequency domain resource as the target frequency domain resource in the available frequency domain resource set according to a certain rule.
  • the rule may be fixed by the protocol, or configured by a higher layer of the terminal device, or controlled by the network device through physical layer control signaling, Media Access Control (MAC) layer control signaling, or radio resource control (Radio). Resource Control, RRC) layer signaling configuration.
  • the RRC layer signaling may be a dedicated RRC message or a system broadcast message.
  • the higher layer may be a MAC layer, an RRC layer or higher layer. The embodiment of the invention is not limited.
  • the terminal device processor 204 can be configured to determine a target frequency domain resource.
  • the terminal device determines a target sub-time period.
  • the terminal device determines the target sub-time period from the sub-time period included in the first time period. Specifically, the terminal device determines the target sub-time period from the sub-time period included in the first part of the first time period.
  • the target sub-period is represented by sSS Target .
  • the terminal device may randomly select one sub-period as the target sub-period in the sub-period included in the first portion of the first time period. For example, assume that the first time period includes four sub-time periods, which are sub-time period 0, sub-time period 1, sub-time period 2, and sub-time period 3. The terminal device can select the sub-period 1 as the target sub-period.
  • the terminal device may further determine, as a target sub-period, a sub-period in the sub-time period included in the first part of the first time period according to a certain rule.
  • the rule may be fixed by the protocol, or configured by a higher layer of the terminal device, or controlled by the network device through physical layer control signaling, Media Access Control (MAC) layer control signaling, or radio resource control (Radio). Resource Control, RRC) layer signaling configuration.
  • the RRC layer signaling may be a dedicated RRC message or a system broadcast message.
  • the higher layer may be a MAC layer, an RRC layer or higher layer. The embodiment of the invention is not limited.
  • the terminal device may randomly select a number i, a natural number, and i ⁇ a pre-configured threshold within a pre-configured threshold.
  • the terminal device takes the i-th sub-period in the first part of the first time period as the target sub-period.
  • Different terminal devices can be configured with different thresholds to reflect different delay requirements of services of different terminal devices or different priorities of services.
  • the terminal device can initiate a counter (or timer).
  • the counter has an initial value of zero.
  • the counter counts from the first sub-period of the first part of the first time period.
  • the counter is incremented by one every time a sub-period is passed, and the terminal device does not monitor the indication information that the target frequency domain resource is transmitted by the other terminal device during the sub-period.
  • the terminal device determines that the sub-period is the target sub-period.
  • C is randomly selected by the terminal device from 0 to N1, or C is pre-configured.
  • the first sub-period counter is equal to zero. If the terminal device does not monitor the indication that the target frequency domain resource is transmitted by other terminal devices during the first sub-period, the counter is incremented by one.
  • the second sub-period counter is equal to one. If the terminal device does not monitor the indication information that the target frequency domain resource is occupied by the other terminal device during the second sub-period, the counter is incremented by one; the third sub-time period counter is equal to 2.
  • the terminal device can initiate a counter (or timer).
  • the initial value of this counter is C.
  • C is a terminal device randomly selected from 0 to N1, or C is pre-configured.
  • C is a natural number and 0 ⁇ C ⁇ N1.
  • the counter counts from the first sub-period of the first part of the first time period.
  • the counter is decremented by one every time a sub-period is passed, and the indication information that the target frequency domain resources sent by other terminal devices are occupied is not monitored.
  • the terminal device does not monitor the indication that the target frequency domain resource is transmitted by the other terminal device during the first sub-period, the counter is decremented by one.
  • the second sub-period counter is equal to one. If the second sub-period does not hear the indication that the target frequency domain resource sent by other terminal equipment is occupied, the counter is decremented by one.
  • the third sub-period counter is equal to zero. The terminal device determines that the third sub-period is the target sub-period. If the indication information that the target frequency domain resource sent by the other terminal device is occupied is monitored, the terminal device may stop the counter.
  • the C When C is pre-configured, the C may be protocol-fixed, or configured by a higher layer of the terminal device, or controlled by a network device through physical layer control, and a Media Access Control (MAC) layer control signal. Let, or Radio Resource Control (RRC) layer signaling configuration.
  • RRC Radio Resource Control
  • the RRC layer signaling When C is configured by the network device through RRC layer signaling, the RRC layer signaling may be a dedicated RRC message or a system broadcast message.
  • the higher layer may be a MAC layer, an RRC layer or higher layer. The embodiment of the invention is not limited.
  • the terminal device may also determine the target sub-time period first, and then determine the target frequency domain resource.
  • the processor 204 of the terminal device can be used to determine the target sub-period.
  • the terminal device monitors indication information that the target frequency domain resource that is sent by the other terminal device is occupied.
  • the indication information indicates that the target frequency domain resource is occupied by other terminal devices.
  • the indication information is any information (such as all 0s) sent on the frequency domain resource corresponding to the target frequency domain resource, and the information may not be decoded, and the terminal device only detects whether the signal energy (or RSSI) is on the frequency domain resource. If the threshold is greater than or equal to a certain threshold, it can be determined whether the target frequency domain resource corresponding to the frequency domain resource is occupied by other terminal devices.
  • the terminal device may monitor the part of the sub-time period in which the target frequency domain resource is located in the first time period.
  • the terminal device determines whether the indication information that the target frequency domain resource is occupied is received according to whether the signal energy (or RSSI) received on the target frequency domain resource is greater than or equal to the threshold Thfast_sesning.
  • the terminal device may monitor the first frequency domain resource corresponding to the target frequency domain resource. For example, if the target resource is the second frequency domain resource 3 and corresponds to the first frequency domain resource 1, the terminal device determines whether the signal energy (or RSSI) received on the first frequency domain resource 1 is greater than or equal to the threshold. Thfast_sesning, to determine whether the indication information that the second frequency domain resource 3 is occupied is received.
  • the threshold Thfast_sesning may be fixed by the protocol, or configured by a higher layer of the terminal device, or controlled by the network device through physical layer control signaling, Media Access Control (MAC) layer control signaling, or Radio Resource Control (Radio Resource). Control, RRC) layer signaling configuration.
  • the RRC layer signaling may be a dedicated RRC message or a system broadcast message.
  • the higher layer may be a MAC layer, an RRC layer or higher layer. The embodiment of the invention is not limited.
  • the terminal device listens to the target frequency domain resource sent by the other terminal device on the at least one sub-time period before the target sub-time period Occupied indication information.
  • the terminal device does not need to monitor the indication information that the target frequency domain resource that is sent by the other terminal device is occupied. At this time, the terminal device performs S505, that is, directly transmits the target frequency domain resource occupation indication information in a part where the target frequency domain resource is located in the target sub-time period.
  • the terminal device listens from the first sub-time period, and then listens to each sub-time period until the previous time period of the target sub-time period is monitored, or the indication information that the target frequency domain resource is occupied is monitored.
  • the terminal device may listen to the indication information on a sub-time period before the counter satisfies the condition. For example, if the counter is counted by addition, when the counter is less than C, the terminal device monitors the indication information during the sub-period. Or, assuming that the counter uses the subtraction count, when the counter is greater than 0, the terminal device monitors the indication information on the sub-period.
  • RSSI signal strength indication
  • the terminal device If the terminal device does not listen to the indication information sent by the other terminal device in a sub-period of the target sub-period, and the next sub-period is not the target sub-period, the terminal device continues to monitor the indication information in the next sub-period. . If the next sub-period is the target sub-period, the terminal device executes S505.
  • the transceiver 201 of the terminal device can be used to monitor indication information.
  • the processor 204 of the terminal device controls the transceiver 201 to listen to the indication information.
  • the terminal device sends, in the target sub-time period, indication information that the target frequency domain resource is occupied.
  • the terminal device sends the indication information in the part of the target frequency domain resource located in the target sub-time period. For example, if the target frequency domain resource is the second frequency domain resource 3, the terminal device sends the indication information by using the first frequency domain resource 3 in the target sub-time period.
  • the terminal device sends the indication information by using the first frequency domain resource corresponding to the target frequency domain resource in the target sub-time period.
  • the terminal device sends the indication information by using the first frequency domain resource 1 in the target sub-time period. , indicating that the second frequency domain resource 3 is occupied.
  • the transmitted indication information is the same as the indication information monitored in step S503. No longer.
  • the transceiver 201 of the terminal device can be configured to send indication information.
  • the terminal device processor 204 controls the transceiver 201 to transmit the indication information.
  • the terminal device sends information on the target frequency domain resource of the second time period.
  • the information that is sent by the terminal device on the target frequency domain resource of the second time period may be control signaling or data, which is not limited in the embodiment of the present invention.
  • the terminal device transmits information using the second frequency domain resource of the target frequency domain resource.
  • the transceiver 201 of the terminal device can be used to transmit information.
  • the processor 204 of the terminal device controls the transceiver 201 to transmit information.
  • the terminal device can send the indication information that the target frequency domain resource is occupied in advance by performing the method in the embodiment of the present invention, so as to prevent other terminal devices from colliding with themselves.
  • the indication information that the target frequency domain resource is occupied by the other terminal device is monitored, thereby avoiding collision with other terminal devices, reducing the collision probability and reducing the delay.
  • FIG. 6 is a schematic flowchart diagram of a method for transmitting information provided by another embodiment of the invention. The method comprises the following steps:
  • S601 is the same as S501 and will not be described here.
  • S602 is the same as S503 and will not be described here.
  • the terminal device monitors indication information that the frequency domain resource is occupied.
  • This step S603 is similar to S504.
  • the difference between this step and S504 is that, in this step, the terminal device does not determine the target resource in advance, but monitors whether multiple available frequency domain resources in the available frequency domain resource set are occupied by other terminal devices. Therefore, the terminal device can monitor indication information that multiple frequency domain resources are occupied. Because multiple other terminal devices can select the same target sub-period, but different target frequency domain resources are selected. Therefore, the terminal device can receive multiple indication information at the same time.
  • the plurality of indication information indicates that a plurality of frequency domain resources are occupied.
  • An indication message indicates that a frequency domain resource is occupied.
  • the occupied frequency domain resource indicated in the indication information monitored in this step may be the second frequency domain resource.
  • the terminal device monitors the second frequency domain resource i on the first frequency domain resource i in the sub time period of the first time period.
  • the occupied indication information, i is a natural number.
  • the terminal device monitors the indication information that the second frequency domain resource j is occupied on the first frequency domain resource i of the first time period sub-time period .
  • the first frequency domain resource i corresponds to the second frequency domain resource j, and i, j are natural numbers.
  • a candidate frequency domain resource set is introduced in the embodiment of the present invention.
  • the candidate frequency domain resource set is a subset of the available frequency domain resource sets.
  • the frequency domain resource included in the candidate frequency domain resource set may be the second frequency domain resource located in the second time period.
  • the candidate frequency domain resource set is the same as the available frequency domain resource set.
  • the terminal device receives one or more indication information in a sub-period, the one or more frequency domain resources corresponding to the one or more indication information are deleted from the available frequency domain resource set.
  • the candidate frequency domain resource set includes one or more frequency domain resources other than the deleted frequency domain resource in the available frequency domain resource set.
  • the candidate frequency-domain resource set is not empty, at least one of the frequency-domain resource sets may be occupied by other terminals.
  • the device continues to monitor indication information that at least one of the candidate frequency domain resource sets is occupied in the next sub-period.
  • the candidate frequency domain resource set is empty in a sub-time period before the target sub-time period, all the frequency domain resources in the frequency domain resource set are occupied by other terminal users, and the terminal device ends the operation of the current time period.
  • the terminal device does not send the indication information that the frequency domain resource is occupied, and/or the terminal device stops listening for the subsequent sub-time period, and/or the terminal device does not send the information in the second time period.
  • the available frequency domain resource set includes the second frequency domain resources 1, 2, 3, 4, and the target sub-time period is the sub-period 2.
  • the candidate frequency domain resource set also includes the second frequency domain resources 1, 2, 3, 4. It is assumed that the terminal device monitors the indication information that the second frequency domain resource 1, 3 is occupied on the sub-period 0. Then, in the listening sub-segment 1, the candidate frequency domain resource set includes only the second frequency domain resource 2, 4.
  • the terminal device listens to the indication information that the second frequency domain resource 2, 4 is occupied again on the time sub-segment 1. Then, in the sub-period 2 (ie, the target sub-period), the candidate frequency domain resource set is an empty set, that is, does not include any second frequency domain resources.
  • the terminal device listens to the indication information sent by the other terminal device on at least one sub-time period before the target sub-time period. If the target sub-time period is the first sub-time period of the first part of the first time period, the terminal device does not need to listen to the indication information sent by other terminal devices. At this time, the terminal device performs S604. If the terminal device is not empty after the current sub-time is monitored, and the next sub-period is the target sub-period, the terminal device performs S604.
  • the transceiver 201 of the terminal device can be used to monitor indication information that the frequency domain resource is occupied.
  • the processor 204 of the terminal device controls the transceiver 201 to listen to indication information that the frequency domain resources are occupied.
  • the terminal device selects one frequency domain resource from the candidate frequency domain resource set as the target frequency domain resource. That is, the terminal device determines the target frequency domain resource.
  • the candidate frequency domain resource set is a subset of the available frequency domain resources, and does not include frequency domain resources occupied by other terminal devices.
  • the terminal device obtains the candidate frequency domain resource set according to the received indication information that one or more frequency domain resources are occupied.
  • the terminal device selects one target frequency domain resource among the at least one frequency domain resource included in the candidate frequency domain resource set.
  • the difference between this step and S502 is that, in this step, the terminal device selects one frequency domain resource as the target frequency domain resource in the candidate frequency domain resource set, and in S502, the terminal device selects one frequency in the available frequency domain resource set.
  • the domain resource is the target frequency domain resource.
  • the implementation manner of selecting the target frequency domain resource by the terminal device is similar to that of S502. No longer.
  • the processor 204 of the terminal device can be used to determine the target frequency domain resource.
  • S605 is the same as S505.
  • S606 is the same as S506.
  • the terminal device can send the target frequency domain resource occupation indication information in advance by performing the method provided by the embodiment of the present invention to prevent other terminal devices from colliding with themselves. Listening to one or more frequency domain resource occupation indication information sent by other terminal equipments before transmitting the target frequency domain resource occupation indication information, thereby selecting frequency domain resources that are not occupied by other terminal equipments, further avoiding collisions with other terminal equipments. , thereby reducing the probability of collision and reducing the delay. Compared with the embodiment of the invention shown in FIG. 5, the terminal device can monitor more frequency domain resources, thereby further reducing the collision probability and reducing the delay.
  • the embodiments of the present invention further provide a device (for example, an integrated circuit, a wireless device, a circuit module, etc.) for implementing the above method.
  • a device for example, an integrated circuit, a wireless device, a circuit module, etc.
  • Implementations of the devices described herein may be stand-alone devices or may be part of a larger device.
  • the device may be (i) a self-contained IC; (ii) a collection of one or more ICs, which may include a memory IC for storing data and/or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter (iv) an ASIC, such as a mobile station modem; (v) a module that can be embedded in other devices; (vi) a receiver, a cellular phone, a wireless device, a handset, or a mobile unit; (vii) other, etc. Wait.
  • a self-contained IC may include a memory IC for storing data and/or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter (iv) an ASIC, such as a mobile station modem; (v) a module that can be embedded in other devices; (vi) a receiver, a cellular phone, a wireless device, a handset, or a mobile unit; (vii) other, etc. Wait.
  • the method and apparatus provided by the embodiments of the present invention may be applied to a terminal device or a network device (which may be collectively referred to as a wireless device).
  • the terminal device or network device or wireless device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system.
  • the application layer includes applications such as browsers, contacts, word processing software, and instant messaging software.
  • the embodiment of the present invention does not limit the specific structure of the execution body of the method, as long as the transmission signal according to the embodiment of the present invention can be executed by running a program recording the code of the method of the embodiment of the present invention.
  • the method can be communicated.
  • the execution body of the method for wireless communication in the embodiment of the present invention may be a terminal device or a network device, or a function module that can call a program and execute a program in the terminal device or the network device.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and the present invention should not be The implementation of the embodiments constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention, or the part contributing to the prior art or the part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or an access network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

Abstract

本发明实施例提供了一种信息发送的方法和装置，用以降低多个终端设备竞争同一频域资源时的碰撞概率，降低数据传输时延。该方法和装置中，发送时间段包括至少一个可用频域资源，且第一时间段包括第一时间段，其中第一时间段又划分成多个子时间段。第一终端设备确定在第一时间段内的目标子时间段，并在目标子时间段之前的一个或多个子时间段上监听一个或多个频域资源被占用的指示信息。如果在目标子时间段有至少一个频域资源可用，即终端设备没有监听到该频域资源被占用的指示信息，则第一终端设备在所述至少一个可用频域资源中的一个上发送频域资源被占用的指示信息。

Description

信息发送的方法和装置 技术领域
本申请涉及通信技术领域，尤其涉及一种信息发送的方法和装置。
背景技术
车联网(Vehicle-To-Everything)是指车辆与外界的信息交互，包括车到车(Vehicle-To-Vehicle，V2V)、车到基础设施(Vehicle-To-Infrastructure,V2I)、车到行人(Vehicle-To-Person，V2P)等方式，这是未来智能汽车、自动驾驶以及智能交通运输系统的基础和关键技术。
与传统的基于蜂窝网通信的方式不同，车联网中各终端设备之间除可以借助基站进行通信外，还可以通过边链路(SideLink，SL)直接通信，即通信双方的数据不需要经过基站转发。
边链路通信包含两种通信模式：第一种通信模式是基于基站调度的边链路通信，终端设备根据基站的调度信息在被调度的无线资源上发送边链路通信的控制信息和数据，称为模式三(mode3)工作模式；第二种通信模式是终端设备监听边链路通信资源池，然后从监听到的可用无线资源中自行选择边链路通信所用的无线资源，并在所选择的无线资源上发送控制信息和数据，称为模式四(mode4)工作模式。边链路通信资源池包括多个无线资源，终端设备每次占用其中的一个或多个频域上连续的无线资源用于通过边链路发送控制信息和数据。
工作在Mode4的终端设备基于历史监听(或侦听，Sensing)信息，选择发送一定大小的发送时间段窗口，并在发送时间段窗口内选择一个时间段发送信息(如控制信息和/或数据)。两个或者多个终端设备可能会选择相同时间段上的相同频域资源。此时，因为冲突，信息可能会发送失败。针对时延要求紧急的业务，发送时间段窗口更小，冲突概率会更大。
发明内容
本发明实施例描述了一种信息发送的方法和装置，用以解决直接使用频域资源发送信息的碰撞概率大，时延大的问题。
第一方面，本发明实施例提供一种信息发送的方法，该方法包括第一终端设备确定发送时间段，其中，发送时间段包括第一时间段，且所述第一时间段的长度小于所述发送时间段的长度，第一时间段包括N个子时间段，N为正整数，且N>1；第一终端设备选择目标子时间段，其中，目标子时间段为N个子时间段中的一个；第一终端设备在所述目标子时间段发送指示信息，所述指示信息用于指示占用目标频域资源，其中目标频域资源位于发送时间段。通过本实施例提供的方案，第一终端设备可以在第一时间段发送目标频域资源被占用的指示信息，以降低与其它终端设备在相同频域资源上碰撞的概率，从而降低由于碰撞带来的时延。
在一种可能的设计中，第一时间段包括第一部分和第二部分；第一部分包括N1个子时间段，用于监听和/或发送频域资源被占用的指示信息，其中N1为正整数，且N1小于N，所述目标子时间段位于所述第一部分；第二部分包括N2个子时间段，用于自动增益控制(AGC),N1+N2≤N。即第一时间段即用于作AGC，又用作发送指示信息，从而保证充分利用资源，保证第二时间段有更多的资源用于进行信息发送。
在一种可能的设计中，第一终端设备在目标子时间段发送指示信息包括：第一终端设备在目标子时间段中与目标频域资源对应的频域资源上发送指示信息。也就是说，终端设备在目标子时间段的第一频域资源上发送指示消息，就表示与之对应就的第二时间段的第二频域资源被占用，这种指示信息的发送方式和接收方式非常简单，其它终端设备在监听到该指示信息后，在当前时间段就不再使用该第二频域资源，从 而减少碰撞概率。
在一种可能的设计中，所述时间段还包括：第二时间段，所述第二时间段位于所述第一时间段后面；所述第一终端设备在所述目标子时间段发送指示信息之后，还包括：所述第一终端设备在所述第二时间段的所述目标频域资源上发送信息。
在一种可能的设计中，第一终端设备发送目标频域资源被占用的指示信息之前，还包括：第一终端设备从发送时间段内可用频域资源集合中，选择一个频域资源作为目标频域资源；第一终端设备在目标子时间段之前的至少一个子时间段上，在与所述目标频域资源对应的第一频域资源上监听其它终端设备发送的指示信息。先选择一个目标频域资源，再监听该目标频域资源是否被其它终端设备占用，进一步简化第一终端设备监听的复杂度，即只需要监听一个频域资源即可。
在一种可能的设计中，如果第一终端设备在与目标频域资源对应的第一频域资源上监听到其它终端设备发送的目标频域资源被占用的指示信息，则第一终端设备不在所述第二时间段的目标频域资源上发送信息；和/或,如果第一终端设备在与目标频域资源对应的第一频域资源上没有监听到其它终端设备发送的目标频域资源被占用的指示信息，则第一终端设备在第二时间段的目标频域资源上发送信息。采用先监听指示信息，再根据是否监听到指示信息来确定是否发送指示信息的方式，能有效降低不同终端设备之间的碰撞概率。
在一种可能的设计中，所述第一终端设备启动计数器，所述计数器初始值C为所述第一终端设备随机选择的或者预配置的，C为自然数且0≤C≤N1；每经过一个子时间段，且在所述子时间段，所述第一终端设备在与所述目标频域资源对应的第一频域资源上没有监听到其它终端设备发送的目标频域资源被占用的指示信息，则所述计数器减1；所述第一终端设备将所述计数器减至0时对应的子时间段确定为所述目标子时间段。
在一种可能的设计中，所述第一终端设备启动计数器，所述计数器初始值为0；每经过一个子时间段，且在所述子时间段，所述第一终端设备在与所述目标频域资源对应的第一频域资源上没有监听到其它终端设备发送的指示信息，则所述计数器加1；所述第一终端设备将所述计数器加至C时对应的子时间段确定为所述目标子时间段，其中C为所述第一终端设备随机选择的或者预配置的，C为自然数且0≤C≤N1。
在一种可能的设计中，第一终端设备发送目标频域资源被占用的指示信息之前，还包括：第一终端设备在目标子时间段之前的至少一个子时间段上，在所述发送时间段内可用频域资源集合内监听其它终端设备发送的指示信息。通过监听更多频域资源，可以更大概率获得没有被其它终端设备占用的频域资源，减少信息发送时延。
在一种可能的设计中，第一终端设备从候选频域资源集合中选择一个频域资源作为目标频域资源，候选频域资源集合为可用频域资源的子集，且不包括所述第一终端设备监听到的其他终端设备发送的指示信息所指示的频域资源。
在一种可能的设计中，第一终端设备在发送时间段之前，还包括：第一终端设备确定发送时间段窗口，其中，发送时间段窗口包括至少一个时间段，发送时间段属于发送时间段窗口中的一个时间段；第一终端设备从时间段窗口中选择一个时间段，作为所述发送时间段。通过确定该时间段，可以保证信息的时延达到业务的服务质量要求。
在一种可能的设计中，第一终端设备根据待发送信息的服务质量要求，确定所述时间段窗口，其中，所述服务质量要求包括时延要求。结合服务质量要求，选择合适的时间窗口，以保证信息的时延。
在一种可能的设计中，第一终端设备确定目标子时间段之前，还包括：第一终端设备在时间段窗口之前的M个时间段内对至少一个频域资源进行监听，确定时间段中的可用频域资源集合,其中，M为正整数。
在一种可能的设计中，时间段为如下任一项：时隙、迷你时隙、子帧、和传输时间间隔(TTI)。
在一种可能的设计中，第一时间段包括X个第一OFDM符号，其中X为正整数；第二时间段包括Y个第二OFDM符号，其中Y为正整数。
在一种可能的设计中，第一OFDM符号与第二OFDM符号子载波间隔相同；或者，第一OFDM符号与第二OFDM符号子载波间隔不同。
第二方面,本发明实施例提供了一种信息发送的装置,包括处理器和与所述处理器耦合的收发器。所述收发器，用于发送或接收信号；所述处理器用于确定发送时间段，其中，所述发送时间段包括第一时间段，且所述第一时间段的长度小于所述发送时间段的长度，所述第一时间段包括N个子时间段，N为正整数，且N>1；所述处理器还用于选择目标子时间段，其中，所述目标子时间段为N个子时间段中的一个；所述处理器还用于通过所述收发器在所述目标子时间段发送指示信息，所述指示信息用于指示占用目标频域资源，其中所述目标频域资源位于所述发送时间段。
在一种可能的设计中，所述第一时间段包括第一部分和第二部分；所述第一部分包括N1个子时间段，用于监听和/或发送频域资源被占用的指示信息，其中N1为正整数，且N1小于所述N，所述目标子时间段位于所述第一部分；所述第二部分包括N2个子时间段，用于自动增益控制,N1+N2≤N。
在一种可能的设计中，所述在所述目标子时间段发送指示信息包括：所述处理器，用于通过所述收发器在所述目标子时间段中的与所述目标频域资源对应的频域资源上发送所述指示信息。
在一种可能的设计中，所述时间段还包括：第二时间段，所述第二时间段位于所述第一时间段后面；所述处理器，在所述目标子时间段发送指示信息之后，还用于在所述第二时间段的所述目标频域资源上发送信息。
在一种可能的设计中，在所述发送目标频域资源被占用的指示信息之前，还包括：所述处理器，用于从所述发送时间段内可用频域资源集合中，选择一个频域资源作为目标频域资源；所述处理器，还用于通过所述收发器，在所述目标子时间段之前的至少一个子时间段上，在与所述目标频域资源对应的频域资源上监听其它终端设备发送的指示信息。
在一种可能的设计中，所述处理器，用于确定如果在与所述目标频域资源对应的频域资源上监听到其它终端设备发送的指示信息，则不在所述第二时间段的所述目标频域资源上发送信息；和/或,所述处理器，用于确定如果在与所述目标频域资源对应的频域资源上没有监听到其它终端设备发送的指示信息，则在所述第二时间段的所述目标频域资源上发送信息。
在一种可能的设计中，所述处理器，用于启动计数器，所述计数器初始值C为所述第一终端设备随机选择的或者预配置的，C为自然数且0≤C≤N1；所述处理器，还用于每经过一个子时间段，且在所述子时间段，所述第一终端设备在与所述目标频域资源对应的频域资源上没有监听到其它终端设备发送的指示信息，则所述计数器减1；所述处理器，还用于将所述计数器减至0时对应的子时间段确定为所述目标子时间段。
在一种可能的设计中，所述处理器，用于启动计数器，所述计数器初始值为0；每经过一个子时间段，且在所述子时间段，所述第一终端设备在与所述目标频域资源对应的频域资源上没有监听到其它终端设备发送的指示信息，则所述计数器加1；所述处理器，还用于将所述计数器加至C时对应的子时间段确定为所述目标子时间段，其中C为所述第一终端设备随机选择的或者预配置的，C为自然数且0≤C≤N1。
在一种可能的设计中，在发送所述目标频域资源被占用的指示信息之前，还包括：所述处理器，用于通过所述收发器，在所述目标子时间段之前的至少一个子时间段上，在所述发送时间段内可用频域资源集合内监听其它终端设备发送的指示信息。
在一种可能的设计中，所述处理器，用于从所述候选频域资源集合中选择一个频域资源作为目标频域资源，所述候选频域资源集合为所述可用频域资源的子集，且不包括所述第一终端设备监听到的其他终端 设备发送的指示信息所占用的频域资源。
在一种可能的设计中，在所述发送时间段之前，还包括：所述处理器，用于确定发送时间段窗口，其中，所述发送时间段窗口包括至少一个时间段，所述发送时间段属于所述发送时间段窗口中的一个时间段；所述处理器，还用于从所述时间段窗口中选择一个时间段，作为所述发送时间段。
在一种可能的设计中，所述处理器，用于根据待发送信息的服务质量要求，确定所述时间段窗口，其中，所述服务质量要求包括时延要求。
在一种可能的设计中，在确定目标子时间段之前，还包括：所述处理器，用于通过所述收发器，在所述时间段窗口之前的M个时间段内对至少一个频域资源进行监听，确定所述时间段中的所述可用频域资源集合，其中，M为正整数。
在一种可能的设计中，所述时间段为如下任一项：时隙、迷你时隙、子帧、和传输时间间隔(TTI)。
在一种可能的设计中，所述第一时间段包括X个第一OFDM符号，其中X为正整数；所述第二时间段包括Y个第二OFDM符号，其中Y为正整数。
在一种可能的设计中，所述第一OFDM符号与所述第二OFDM符号子载波间隔相同；或者，所述第一OFDM符号与所述第二OFDM符号子载波间隔不同。
第三方面，本发明实施例提供一种处理器可读存储介质，包括指令，当所述指令在处理器上运行时，使得所述处理器执行本发明各实施例中的方法。
第四方面，本发明实施例提供一种通信装置，该通信装置包括处理器和与所述处理器相耦合的存储器，所述处理器包括输入输出接口，所述输入输出接口用于发送信号和接收信号，所述存储器用于存储指令，所述处理器用于读取并执行存储器中的指令以控制所述通信装置执行本发明各实施例中的方法。
附图说明
图1所示为应用于本发明实施例无线通信系统的示意图。
图2所示为上述无线通信系统中，终端设备的可能的结构示意图。
图3所示为信息发送的时序关系示意图。
图4所示为本发明实施例中时间段结构划分示意图。
图5所示为本发明实施例提供的一种信息发送的方法的流程示意图。
图6所示为本发明实施例提供的另一种信息发送的方法的流程示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整的描述。需要说明的是，在不冲突的情况下，本发明各个实施例中的技术方案或特征可以相互组合。
应理解，本发明适用于无线通信系统。例如，长期演进(Long Term Evolution,LTE)的设备到设备(Device to Device,D2D)通信，增强的D2D通信，车联网(Vehicle to everything)通信，包括车到车(Vehicle to Vehicle，V2V)、车到人(Vehicle to Pedestrian，V2P)、车到基础设施(Vehicle to Infrastructure，V2I)等通信，5G通信系统中基于边链路通信的通信系统等。本发明实施例以5G通信系统中的V2V通信为例，并不构成对本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着新业务场景的出现和网络架构的演变，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
应理解，边链路通信技术是一种端到端直接通信的技术，与传统的蜂窝通信技术最大的不同在于，终端设备与终端设备之间通过边链路通信不再需要基站的中转直接就可以进行通信，基站可以进行资源的配置、调度、协调等，以辅助终端设备之间通过边链路进行通信。
图1给出了本发明实施例的一种应用场景，该场景中包括网络设备101，终端设备111～114(为简化起见，图示中只给出了4个终端设备，但并不意味着只能是4个终端设备，事实上，可以有任意数量个终 端设备)。终端设备111～114的部分或全部可以位于网络设备101覆盖范围内，也可以位于网络设备101覆盖范围外。网络设备101与终端设备111～114中的一个或多个通过空中接口进行通信(如在LTE和5G系统中，该空中接口为Uu接口)。比如，在图1中，终端设备112通过空中接口131与网络设备101进行通信。终端设备111～114之间也可以通过边链路通信(如在LTE中，该边链路接口为PC5接口)。如图1所示，终端设备111与终端设备112通过边链路121通信，终端设备113与终端设备114通过边链路122通信。本发明实施例的另一种应用场景中，可以只存在终端设备111～114。此时终端设备111～114之间可以通过边链路通信(如在LTE中，该边链路接口为PC5接口)。
在终端设备之间通过边链路通信时，包括两种工作模式，一种是Mode3工作模式，另一种是Mode4工作模式。
在Mode3工作模式下，终端设备请求网络设备分配边链路通信的无线资源，并根据网络设备的调度信息在被分配的无线资源上发送边链路通信的控制信息和数据，如图1所示的终端设备111与112进行边链路通信时，终端设备111向网络设备发送调度请求，以请求网络设备101为终端设备111分配边链路通信资源，相应的，网络设备101为终端设备111分配资源，并通过调度信息，将为终端设备111分配的资源通知给终端设备111，则终端设备111使用该资源向其它终端设备发送控制信息和/或数据。
在Mode4工作模式下，终端设备监听边链路通信资源池，然后从监听到的至少一个可用无线资源中自行选择边链路通信所用的一个或多个无线资源，并在所选择的资源上发送控制信息和数据。其中边链路通信资源池包括多个无线资源，终端设备每次通过边链路发送控制信息和数据占用其中的一个或多个无线资源，且该一个或多个无线资源在频域上连续。如图1所示的终端设备113与114进行边链路通信时，采用Mode4工作模式。边链路通信资源池包括多个无线资源，终端设备使用其中的一个或多个频域上连续的无线资源发送控制信息和数据。
应理解，在本发明实施例中，网络设备(例如网络设备101)是一种部署在无线接入网(Radio Access Network，RAN)中用以为终端设备提供无线通信功能的装置。所述网络设备可以包括各种形式的宏基站，微基站(也称为小站)，中继站，接入点等。网络设备可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，也可以是LTE或eLTE中的演进型基站(Evolutional Node B，eNB或e-NodeB)，或者是下一代移动网络，例如5G(fifth generation)中的基站gNB((next)generation NodeB)，或者V2X通信中的路边单元(Road Side Unit，RSU)，或者为上述网络设备或者基站内部的芯片或者片上系统(System on Chip，SOC)。为方便描述，本申请中，简称为网络设备或接入网设备，有时也称为基站。
在本发明实施例中，终端设备也可称之为用户设备(User Equipment，UE)、移动台(Mobile Station，MS)、移动终端(Mobile Terminal)等，该终端设备可以经无线接入网设备与一个或多个核心网设备进行通信，例如，终端设备是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(Tablet)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。为方便描述，本申请中，简称为终端设备或UE。
图2示出了本发明实施例提供的一种无线通信设备，该无线通信装设备可以作为终端设备111～114或者应用于终端设备111～114中的装置。以下以图2所示的无线通信设备为终端设备为例进行说明。该终端 设备能够执行本发明实施例提供的方法。该终端设备可以是4个终端设备111～114中的任一个。所述终端设备包括收发器201、存储器203和用于实现无线通信功能的处理器204。
收发器201可以用于支持终端设备111～114与网络设备101之间收发信息。在下行链路，来自网络设备的下行链路射频信号经由天线接收，由收发器201进行调解，提取基带信号并输出至处理器204进行处理，来恢复网络设备所发送的业务数据和/或信令信息。在上行链路上，承载着将要向网络设备发送的业务数据和/或信令消息的基带信号由收发器201进行调制，来产生上行链路的射频信号，并经由天线发射给网络设备。收发器201还可以用于支持终端设备111～114之间收发信息。在边链路接收方向，来自其它终端设备的边链路射频信号经由天线接收，由收发器201进行调解，提取基带信号并输出至处理器204进行处理，来恢复其它终端设备所发送的业务数据和/或信令信息。在边链路发送方向，承载着将要向其它终端设备发送的业务数据和/或信令消息的基带信号由收发器201进行调制，来产生边链路的射频信号，并经由天线发射给其它终端设备。收发器201可以包括独立的接收器和发送器电路，也可以集成在同一个电路实现收发功能。
处理器204可以是调制解调器处理器(modem processor)。处理器204可包括基带处理器(baseband processor，BBP)，该基带处理器处理经数字化的收到信号以提取该信号中承载的信息或数据比特。为此目的，BBP通常由处理器204内的一个或多个数字信号处理器(digital signal processor，DSP)中或由分开的集成电路(integrated circuit，IC)来实现。
例如，如图2所示，处理器204可包括编码器2041，调制器2042，解码器2043，解调器2044。编码器2041用于对待发送信号进行编码。例如，编码器2041可用于接收要在上行链路上(或边链路上)发送的业务数据和/或信令消息，并对业务数据和信令消息进行处理(例如，格式化、编码、或交织等)。调制器2042用于对编码器2041的输出信号进行调制。例如，调制器可对编码器的输出信号(数据和/或信令)进行符号映射和/或调制等处理，并提供输出采样。解调器2044用于对输入信号进行解调处理。例如，解调器2044处理输入采样并提供符号估计。解码器2043用于对解调后的输入信号进行解码。例如，解码器2043对解调后的输入信号解交织、和/或解码等处理，并输出解码后的信号(数据和/或信令)。
处理器204接收可表示语音、数据或控制信息的数字化数据，并对这些数字化数据处理后以供传输。处理器204可以支持多种通信系统的多种无线通信协议中的一种或多种，例如长期演进(Long Term Evolution，LTE)通信系统，新空口(New Radio，NR)，通用移动通信系统(Universal Mobile Telecommunications System，UMTS)，高速分组接入(High Speed Packet Access，HSPA)等等。可选的，处理器204中也可以包括一个或多个存储器。
所述终端设备还可以包括应用处理器(application processor)302，用于生成上述的可表示语音、数据或控制信息的数字化数据。
处理器204和应用处理器202可以是集成在一个处理器芯片中。
存储器203用于存储用于支持所述终端设备通信的程序代码(有时也称为程序，指令，软件等)和/或数据。
需要说明的是，该存储器203可以包括一个或多个存储单元，例如，可以是处理器204或应用处理器202内部的存储单元，或者可以是与处理器204或应用处理器202独立的外部存储单元，或者还可以是包括处理器204或应用处理器202内部的存储单元以及与处理器204或应用处理器202独立的外部存储单元的部件。
处理器204可以是不同类型的处理器。例如可以实现在中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可 编程逻辑器件、晶体管逻辑器件、硬件部件、其他集成电路、或者其任意组合。处理器204可以实现或执行结合本发明实施例公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能器件的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合或者片上系统(system-on-a-chip，SOC)等等。
本领域技术人员能够理解，结合本申请所公开的诸方面描述的各种解说性逻辑块、模块、电路和算法可被实现为电子硬件、存储在存储器中或另一计算机可读介质中并由处理器或其它处理设备执行的指令、或这两者的组合。作为示例，本文中描述的设备可用在任何电路、硬件组件、IC、或IC芯片中。本申请所公开的存储器可以是任何类型和大小的存储器，且可被配置成存储所需的任何类型的信息。为清楚地解说这种可互换性，以上已经以其功能性的形式一般地描述了各种解说性组件、框、模块、电路和步骤。此类功能性如何被实现取决于具体应用、设计选择和/或加诸于整体系统上的设计约束。本领域技术人员可针对每种特定应用以不同方式来实现所描述的功能性，但此类实现决策不应被解读为致使脱离本发明各实施例的范围。
工作在Mode4的终端设备基于历史监听(Sensing)信息或监听结果，选择发送时间段窗口，并在发送时间段窗口内选择一个时间段发送控制信息和/或数据。为了方便描述，在本发明各实施例中，将控制信息和/或数据统称为信息。例如，以图3为例，终端设备监听时间段n-1000至时间段n-1，并根据监听结果选择发送时间段窗口为n+T1至n+T2，再从发送时间段窗口中选择n+T1+2作为发送时间段n+Tselect发送信息。由于发送时间段窗口的上沿要保证业务的时延要求，因此，发送时间段窗口不能太大。因此两个或者多个终端设备可能会在发送时间段窗口内选择相同的发送时间段上的相同的频域资源。此时，因为冲突发送信息可能会失败。针对时延要求紧急的业务，发送时间段窗口更小，冲突概率会更大。
为了解决上述问题，本发明实施例提供了一种信息发送的方法。该方法中，发送时间段至少包括第一时间段，第一时间段的长度小于发送时间段的长度。第一时间段包含多个子时间段。当第一终端设备有数据要发送时，第一终端设备可以根据所述历史侦听信息(或者监听结果)，选择发送时间段窗口。然后第一终端设备在发送时间段窗口中选择一个发送时间段。第一终端设备从选择的发送时间段的第一时间段中选择一个目标子时间段。第一终端设备可以在选择的第一时间段中监听目标子时间段之前的至少一个子时间段。具体的，第一终端设备在所监听的每个子时间段上，可以监听其它终端设备发送的频域资源被占用的指示信息。如果没有监听到指示信息或者不需要监听指示信息，则第一终端设备在目标子时间段发送频域资源被占用的指示信息，该指示信息用于指示目标时间段中的目标频域资源被占用。第一终端设备发送频域资源被占用的指示信息后，在第二时间段，可以使用目标频域资源发送信息。通过本发明实施例提供的方法，通过将发送时间段划分成两部分，并将第一时间段再划分成多个子时间段，多个终端设备之间可以有机会选择不同的子时间段发送频域资源占用指示信息。与终端设备直接使用所选择的发送时间段中频域资源发送信息相比，本发明实施例所提供的方法能有效减少终端设备之间的碰撞概率，从而降低时延。
下面分别对时间段在时域上的结构和在频域上包括的频域资源的结构进行描述。
(1)时间段在时域上的结构
图4给出了本发明各实施例的发送时间段窗口及发送时间段结构示意图。
需要指出的是，本发明各实施例中，时间结构(时间轴)由多个在时间上连续的时间段构成。一个时间段具体可以是如图4中的一个发送时间段。
如图4所示，一个发送时间段窗口包括一个或多个发送时间段，发送时间段窗口内的一个方框表示一个发送时间段。任何一个时间段均可以作为发送时间段。一个发送时间段可以包括一个或多个时隙(slot)的长度，或者包括一个或多个迷你时隙(Mini-slot)的长度，或者包括一个或多个子帧的长度，或者包括一个或多个传输时间间隔(Transmission Time Interval，TTI)的长度，或者一个或多个正交频分复 用(orthogonal frequency-division multiplexing，OFDM)符号，本发明各实施例不作限制。比如，在LTE系统中，一个发送时间段可以是一个子帧(Subframe)。一个子帧的长度是1毫秒(Millisecond,ms)。一个子帧包括2个时隙。一个子帧包括14个OFDM符号(使用普通长度的循环前缀)或者12个OFDM符号(使用扩展长度的循环前缀)。一个TTI的长度等于一个子帧的长度，或者包括一个时隙的长度，或者更短。再比如，在5G系统中，一个发送时间段可以包括一个迷你时隙。一个迷你时隙包括1个或多个OFDM符号。需要说明的是，本发明各实施例中的发送时间段不仅限于LTE系统或5G系统中，也可以应用在其它系统中，本发明各实施例不作限制。
为描述方便，本发明各实施例中以时隙为例，来表示时间段。相应的，子时间段也可以称为短时隙，或者快速监听时隙。
发送时间段包括第一时间段和第二时间段。第二时间段位于第一时间段后面。即，依时间顺序，分别是第一时间段和第二时间段。终端设备可以利用第一时间段监听和/或发送频域资源占用指示信息。终端设备可以利用第二时间段发送信息。
下面分别对第一时间段和第二时间段进行描述。
(a)第一时间段。第一时间段包括N个子时间段，N为正整数，且N>1。比如N＝4。如图4所示，第一时间段内的一个用横线填充的方框表示一个子时间段。第一时间段用于终端设备监听和/或发送频域资源占用指示信息。即，第一时间段用于多个终端设备之间协调当前发送时间段的频域资源。一个子时间段可以包括一个或多个OFDM符号。在一种实现方式中，第一时间段包括X个OFDM符号，X为正整数。为描述方便，本发明各实施例中将第一时间段包括的OFDM符号称为第一OFDM符号。即，第一时间段包括X个第一OFDM符号。在另一种实现方式中，一个子时间段长度可以为9微秒(μs)。第一时间段的长度在本发明不作限制。第一时间段在时域上包括第一部分和第二部分。第一部分包括N1个子时间段，用于监听和/或发送频域资源占用指示信息，其中N1为正整数，且N1<N。第二部分包括N2个子时间段，用于自动增益控制(Automatic Gain Control，AGC)，其中，N2为正整数，且N1+N2≤N。即，N个子时间段中，N1个子时间段用于终端设备监听和/或发送频域资源占用指示信息，N2个子时间段用于AGC。在一种实现方式中，第二部分位于第一时间段中的最后N2个子时间段，或者位于第一部分之后。在另一种实现方式中，第二部分可以位于第一时间段最前面N2个子时间段，或者位于第一部分之前。终端设备通过自动增益控制AGC，来调整接收的信号强度，进而确保终端设备正确解码所需的信噪比(Signal-Noise Ratio,SNR)。比如，当接收信号强度较弱的时候，终端设备通过AGC放大信号强度，将SNR提升到合理的范围。当接收信号强度较强的时候，终端设备通过AGC减弱接收信号强度，避免出现信号强度超过合理范围导致的接收性能恶化。由于V2X的通信可能存在一对多，多对一和多对多通信的情况，而且不同终端设备之间的距离可能不同，容易导致终端设备接收的信号强度变化很大。因此，终端设备通过AGC来调整接收的信号强度以提升接收性能。
(b)第二时间段。第二时间段包括一个或多个OFDM符号。在一种实现方式中，第二时间段包括Y个OFDM符号，Y为正整数。为描述方便，本发明各实施例中称第二时间段包括的OFDM符号为第二OFDM符号。即，第二时间段包括Y个第二OFDM符号。
在本发明各实施例中，第一OFDM符号与第二OFDM符号的子载波间隔可以相同,也可以不同。在一种实现方式中，第一OFDM符号采用的子载波间隔等于第二OFDM符号采用的子载波间隔。在另一种实现方式中，第一OFDM符号采用的子载波间隔大于第二OFDM符号采用的子载波间隔。在另一种实现方式中，第一OFDM符号采用的子载波间隔是第二OFDM符号采用的子载波间隔的整数倍。比如，第一OFDM符号和第二OFDM符号均可以采用15KHz的子载波间隔。或者第一OFDM符号采用30KHz，60KHz,或120KHz等子载波间隔，第二OFDM符号采用15KHz子载波间隔。本发明各实施例不对第一OFDM符号和第二OFDM符号采用的 具体子载波间隔进行限制。
(2)时间段在频域上包括的频域资源的结构
一个时间段在频域上包括频域资源集合，其中频域资源集合包括一个或多个频域资源。如果频域资源集合包括多个频域资源，则多个频域资源之间是频分复用的。一个频域资源在频域上占用一定的宽度。比如，一个频域资源可以占用180KHz，或者，一个频域资源可以占用1个物理资源块(Physical Resource Block，PRB)，或者，一个频域资源可以占用6个子载波。一个频域资源包括的资源(如PRB，或子载波)在频域上可以是连续的，也可以是离散的，本发明实施例不作限制。频域资源具体可以为单一时隙资源(single-slot resource)，或者无线资源，或者时频资源。频域资源集合具体可以为单一时隙资源集合，或者无线资源集合，或者时频资源集合。频域资源可以用于物理边链路控制信道(Physical Sidelink Control Channel,PSCCH)和/或物理边链路共享信道(Physical Sidelink Shared Channel,PSSCH)。当频域资源为单一时隙资源时，一个时间段包括的单一时隙资源集合中包括一个或多个单一时隙资源。单一时隙资源可用于PSCCH和/或PSSCH。即，单一时隙资源可用于传输边链路控制信令和/或数据。
为描述方便，频域资源位于第一时间段中的每个子时间段的部分称为第一频域资源，频域资源位于第二时间段中的部分称为第二频域资源。即，第一频域资源属于频域资源，且第一频域资源位于频域资源的第一时间段部分；第二频域资源属于频域资源，且第二频域资源位于频域资源的第二时间段部分。每个第一频域资源与一个第二频域资源一一对应。一种实现方式是，第一频域资源与第二频域资源在频域上是同一块资源(同频)，只是占用一个时间段内的不同的时间。另一种实现方式是，第一频域资源与第二频域资源在频域上不同，但是一一对应。比如，第一频域资源与第二频域资源的对应关系包括，第一频域资源1对应第二频域资源2，第一频域资源2对应第二频域资源3，第一频域资源3对应第二频域资源1。第一频域资源与第二频域资源的对应关系可以通过网络设备或者终端设备的高层进行配置，或者在协议中固定。
第一频域资源用于发送指示信息，指示被占用的频域资源，或者指示被占用的第二频域资源。第二频域资源用于发送信息。
时间段结构相关的参数包括如下至少一项：第一时间段和/或第二时间段的长度，N的取值，子时间段的长度，第一时间段采用的第一OFDM符号的子载波间隔，第一时间段包含的第一OFDM符号个数，第一时间段中的子时间段包括的第一OFDM符号个数，N1和/或N2的取值，第二时间段包含的第二OFDM符号的个数，第二OFDM符号采用的子载波间隔，一个时间段(即第一时间段和第二时间段)包含的频域资源的数量，每个频域资源在频域上的宽度。时间段结构相关的参数中的一项或多项可以是协议固定的，或者由终端设备的高层配置，或者由网络设备通过物理层控制信令，媒体接入控制(Media Access Control，MAC)层控制信令，或者无线资源控制(Radio Resource Control，RRC)层信令配置。当时间段结构相关的参数由网络设备通过RRC层信令配置时,RRC层信令可以是专用RRC消息，也可以是系统广播消息。所述高层可以是MAC层，RRC层或更高层。
终端设备监听第一时间段内的一个或多个子时间段，并其中一个子时间段的一个第一频域资源上发送指示信息。该指示信息用于指示占用与该第一频域资源对应的第二频域资源。通过上述时间段结构和方法，终端设备可以实现与其它终端设备协调当前时间段的频域资源，以降低碰撞概率。
一种示例性的时间段结构描述如下：
假设时间段为时隙，OFDM符号的子载波间隔(sub-carrier space，SCS)为15KHz，采用正常循环前缀(Cyclic Prefix,CP)。一个时隙包括14个OFDM符号。在一种实现方式中，第一时间段包括时隙中的第一个OFDM符号。第一时间段用于监听和/或发送指示信息，即用于指示占用了哪个频域资源。或者，第一个符号用于快速监听(Fast Sensing)。第一个OFDM符号还可以用于AGC。
第一个OFDM符号包括N个短监听时隙(Short-Sensing Slot，sSS)，N为正整数。即，第一个OFDM 符号包括N个子时间段。具体的，第一个OFDM符号包括{sSS 0，sSS 1,…,sSS N-1}。其中
Figure PCTCN2019076014-appb-000001
L OFDM＿symbol为第一个OFDM的符号长度，L sSS为一个sSS的长度。即N为L OFDM＿symbol与L sSS相除再向下取整。sSSN-1的长度≥L sSS，即最后一个sSS的长度有可能大于L sSS。假设N＝5，前N1＝4个sSS用于快速监听。后N2＝1个sSS用于AGC，即{sSS 0，sSS 1,…,sSS 3}用于快速侦听，sSS 5用于AGC。在另一种实现方式中，第一时间段可以包括时隙中的前k个OFDM符号，k为正整数，且k≤14。比如，第一时间段包括时隙中的前2(即k＝2)个OFDM符号，或者，包括时隙中的前3(即k＝3)个OFDM符号。第一时间段包括N个短监听时隙。相应的，一个sSS的长度在上面描述基础上相应变化，在此不作赘述。
下面结合图4示出的时间段结构，对本发明实施例提供的一种信息发送的方法进行描述。
本发明各实施例中的终端设备，可以是图1中终端设备111～114中的任意一个。为描述方便，以下以终端设备是终端设备111为例，进行说明。
图5给出了一个本发明实施例提供的一种信息发送的方法的流程示意图。该方法包括如下步骤：
S501，终端设备确定发送时间段。
在确定发送时间段之前，当有边链路数据在时间段n达到并需要发送给其它终端设备时，终端设备根据历史监听信息(或监听结果)和高层的要求，确定一个发送时间段窗口[n+T1,n+T2]，其中T1,T2为整数，且T1≥0,T2≥0。所述高层可以是MAC层，无线链路控制(Radio Link Control,RLC)层，分组数据汇聚(Packet Data Convergence Protocol,PDCP)层，业务数据适配(Service Data Adaptation Protocol，SADP)层，RRC层或更高层。
终端设备在发送时间段窗口之前的L个时间段中的至少一个时间段进行监听，或者在时间段n之前的L个时间段中的至少一个时间段进行监听。终端设备在L个时间段中的至少一个时间段，监听至少一个频域资源是否被其它终端设备占用，或者监听至少一个频域资源空闲还是忙，或者监听至少一个频域资源是否可用，或者监听至少一个频域资源是否为可用频域资源。通常，终端设备通过接收频域资源上的能量的方式判断频域资源是否可用，比如，终端设备监听到某个频域资源上的接收信号的能量或者接收信号强度指示(Received Signal Strength Indication，RSSI)，大于或等于某个域值，则终端设备认为该频域资源不可用，或者认为该频域资源忙，或者认为该频域资源被其它终端设备使用。反之，如果接收信号的能量小于某个域值，则终端设备认为该频域资源可用，或者认为该频域资源空闲，即该频域资源为可用频域资源，由一个或多个可用频域资源组成的集合即为可用频域资源集合。
终端设备根据历史监听信息，确定发送时间段窗口。终端设备从发送时间段窗口中，选择一个时间段n+Tselect作为发送时间段。T1≤n+Tselect≤T2,Tselect为自然数。终端设备可以在发送时间段窗口中随机选择一个时间段作为发送时间段。终端设备还可以根据一定规则，在发送时间段窗口中选择一个时间段作为发送时间段。所述规则可以是协议固定的，或者由终端设备的高层配置，或者由网络设备通过物理层控制信令，媒体接入控制(Media Access Control，MAC)层控制信令，或者无线资源控制(Radio Resource Control，RRC)层信令配置。当所述规则由网络设备通过RRC层信令配置时,RRC层信令可以是专用RRC消息，也可以是系统广播消息。所述高层可以是MAC层，RRC层或更高层。在本发明实施例不作限制。
一种实现方式中，终端设备的处理器201可用于确定发送时间段。
S502，终端设备选择目标频域资源。
终端设备可以根据历史监听信息，确定在发送时间段n+Tselect上的可用频域资源集合。可用频域资源集合包括J个可用频域资源，J为自然数。比如，可用频域资源集合包括J个可用单一时隙资源。J个可用单一时隙资源分别表示为R 0,n+Tselect，R 1,n+Tselect，…，R J-1,n+Tselect。可以理解的，一个时间段中可用频域资源集合中包括的频域资源的个数小于或等于该时间段中频域资源集合中包括的频域资源的个数。可 以理解的，终端设备确定的发送时间段要至少包含一个可用频域资源。即，终端设备确定的发送时间段中的可用频域资源集合不为空。
目标频域资源属于可用频域资源集合。需要说明的是，由于终端设备使用可用频域资源集合中的频域资源发送信息，因此，本发明各实施例中提到的可用频域资源集合可以是第二时间段中的可用的第二频域资源的集合。相应的，终端设备确定目标频域资源可以是终端设备确定第二时间段中的目标第二频域资源。可用频域资源集合还可以是第一时间段和第二时间段中的可用的第二频域资源的集合，或者是发送时间段的频域资源的集合。相应的，终端设备确定目标频域资源还可以是终端设备确定第一时间段和第二时间段中的目标频域资源，或者是发送时间段的目标频域资源。如果发送时间段中的可用频域资源集合只包括一个频域资源，则终端设备确定该频域资源为目标频域资源。如果发送时间段的可用频域资源集合包括两个或多个频域资源，则终端设备从可用频域资源集合中选择一个频域资源作为目标频域资源。终端设备可以在可用频域资源集合中随机选择一个可用频域资源作为目标频域资源。终端设备还可以根据一定规则，在可用频域资源集合中选择一个可用频域资源作为目标频域资源。所述规则可以是协议固定的，或者由终端设备的高层配置，或者由网络设备通过物理层控制信令，媒体接入控制(Media Access Control，MAC)层控制信令，或者无线资源控制(Radio Resource Control，RRC)层信令配置。当所述规则由网络设备通过RRC层信令配置时,RRC层信令可以是专用RRC消息，也可以是系统广播消息。所述高层可以是MAC层，RRC层或更高层。在本发明实施例不作限制。
一种实现方式中，终端设备处理器204可以用于确定目标频域资源。
S503，终端设备确定目标子时间段。
终端设备从第一时间段包括的子时间段中，确定目标子时间段。具体的，终端设备从第一时间段的第一部分包括的子时间段中，确定目标子时间段。为方便描述，目标子时间段用sSS Target来表示。
在一种实现方式中，终端设备可以在第一时间段的第一部分包括的子时间段中随机选择一个子时间段作为目标子时间段。比如，假设第一时间段包括4个子时间段，分别是子时间段0，子时间段1，子时间段2和子时间段3。终端设备可以选择子时间段1作为目标子时间段。
在第二种实现方式中，终端设备还可以根据一定规则，在第一时间段的第一部分包括的子时间段中确定一个子时间段作为目标子时间段。所述规则可以是协议固定的，或者由终端设备的高层配置，或者由网络设备通过物理层控制信令，媒体接入控制(Media Access Control，MAC)层控制信令，或者无线资源控制(Radio Resource Control，RRC)层信令配置。当所述规则由网络设备通过RRC层信令配置时,RRC层信令可以是专用RRC消息，也可以是系统广播消息。所述高层可以是MAC层，RRC层或更高层。在本发明实施例不作限制。
基于第二种实现方式，终端设备可以在预配置的阈值内随机选择一个数i，i为自然数，且i≤预配置的阈值。终端设备将第一时间段的第一部分中的第i子时间段作为目标子时间段。不同的终端设备可以配置不同的阈值，以体现不同的终端设备的业务的时延要求不同或业务的优先级不同。
基于第二种实现方式，终端设备可以启动一个计数器(或定时器)。该计数器初始值为0。计数器从第一时间段的第一部分第一个子时间段开始计数。每经过一个子时间段，且终端设备在该子时间段没有监听到其它终端设备发送的目标频域资源被占用的指示信息，则计数器加1。当计数器达C或C-1，则终端设备确定该子时间段为目标子时间段。到随机选择的数值C或预配置的阈值C，或者达到随机选择的数值C-1或预配置的阈值C-1，C为终端设备从0到N1随机选择的，或者C是预配置的。C为自然数且0≤C≤N1。比如，假设C＝2，且假设计数器达到2时，确定对应的子时间段为目标子时间段。第一个子时间段计数器等于0。如果终端设备在第一个子时间段没有监听到其它终端设备发送的目标频域资源被占用的指示信息，则将计数器加1。第二个子时间段计数器等于1。如果终端设备在第二个子时间段没有监听到其它终端设 备发送的目标频域资源被占用的指示信息，则将计数器加1；第三个子时间段计数器等于2。终端设备确定第三个子时间段即为目标子时间段。如果监听到其它终端设备发送的目标频域资源被占用的指示信息,终端设备可以停止该计数器。如果监听到其它终端设备发送的目标频域资源被占用的指示信息,终端设备不在本时间段发送信息。比如，假设C＝2，第一个子时间段监听到其它终端设备发送的目标频域资源被占用的指示信息，则终端设备确定目标频域资源被其它终端设备占用，则终端设备不再使用该时间段发送信息。
基于第二种实现方式，终端设备可以启动一个计数器(或定时器)。该计数器初始值为C。C为终端设备从0到N1随机选择的，或者C是预配置的。C为自然数且0≤C≤N1。计数器从第一时间段的第一部分第一个子时间段开始计数。每经过一个子时间段，且该时间段没有监听到其它终端设备发送的目标频域资源被占用的指示信息，则计数器减1。当计数器递减至0或1或-1时，终端设备确定该子时间段为目标子时间段。比如，假设C＝2，第一个子时间段计数器等于2。如果终端设备在第一个子时间段没有监听到其它终端设备发送的目标频域资源被占用的指示信息，则将计数器减1。第二个子时间段计数器等于1。如果第二个子时间段没有监听到其它终端设备发送的目标频域资源被占用的指示信息，则将计数器减1。第三个子时间段计数器等于0。终端设备确定第三个子时间段即为目标子时间段。如果监听到其它终端设备发送的目标频域资源被占用的指示信息,终端设备可以停止该计数器。如果监听到其它终端设备发送的目标频域资源被占用的指示信息,终端设备不在本时间段发送信息。比如，假设C＝2，第一个子时间段监听到其它终端设备发送的目标频域资源被占用的指示信息，则终端设备确定目标频域资源被其它终端设备占用，则终端设备不再使用该时间段发送信息。
当C是预配置的时，所述C可以是协议固定的，或者由终端设备的高层配置，或者由网络设备通过物理层控制信令，媒体接入控制(Media Access Control，MAC)层控制信令，或者无线资源控制(Radio Resource Control，RRC)层信令配置。当C由网络设备通过RRC层信令配置时,RRC层信令可以是专用RRC消息，也可以是系统广播消息。所述高层可以是MAC层，RRC层或更高层。在本发明实施例不作限制。
可以理解的，S502和S503顺序可以调换，均可以实现本发明实施例的目的。即终端设备也可以先确定目标子时间段，然后再确定目标频域资源。
一种实现方式中，终端设备的处理器204可用于确定目标子时间段。
S504，终端设备监听其它终端设备发送的目标频域资源被占用的指示信息。
指示信息指示目标频域资源被其它终端设备占用。该指示信息为在与目标频域资源对应频域资源上发送的任何信息(比如全0)，该信息可以不被解码，终端设备仅从在该频域资源上检测信号能量(或RSSI)是否大于或等于某个阈值，即可以判断该频域资源对应的目标频域资源是否被其它终端设备占用。当第一频域资源与第二频域资源在频域上是同一块资源(同频)时，终端设备可以监听目标频域资源位于第一时间段的子时间段的部分。比如，终端设备根据在目标频域资源上接收的信号能量(或RSSI)是否大于或等于阈值Thfast_sesning，来确定是否接收到目标频域资源被占用的指示信息。当第一频域资源与第二频域资源在频域上一一对应时，终端设备可以监听与目标频域资源对应的第一频域资源。比如，假设目标资源是第二频域资源3，与之对应的是第一频域资源1，则终端设备根据在第一频域资源1上接收的信号能量(或RSSI)是否大于或等于阈值Thfast_sesning，来确定是否接收到第二频域资源3被占用的指示信息。阈值Thfast_sesning可以是协议固定的，或者由终端设备的高层配置，或者由网络设备通过物理层控制信令，媒体接入控制(Media Access Control，MAC)层控制信令，或者无线资源控制(Radio Resource Control，RRC)层信令配置。当通过RRC层信令配置时,RRC层信令可以是专用RRC消息，也可以是系统广播消息。所述高层可以是MAC层，RRC层或更高层。在本发明实施例不作限制。
如果目标子时间段不是第一时间段的第一部分的第一个子时间段，则终端设备在所述目标子时间段之 前的至少一个子时间段上，监听其它终端设备发送的目标频域资源被占用的指示信息。
如果目标子时间段是第一时间段的第一部分的第一个子时间段，则终端设备不需要监听其它终端设备发送的目标频域资源被占用的指示信息。此时，终端设备执行S505，即直接在在目标频域资源位于目标子时间段的部分发送目标频域资源占用指示信息。
终端设备在从第一个子时间段开始监听，后面每个子时间段都要监听，直到监听到目标子时间段的前一个时间段，或者监听到目标频域资源被占用的指示信息为止。
当终端设备通过步骤S503的第二种实现方式确定目标子时间段时，终端设备可以在计数器满足条件之前的子时间段上监听指示信息。比如，假设计数器采用加法计数，则在计数器小于C时，终端设备在子时间段上监听指示信息。或者，假设计数器采用减法计数，则在计数器大于0时，终端设备在子时间段上监听指示信息。
如果终端确定在目标子时间段之前的一个子时间段上接收到目标频域资源被占用的指示信息，结束本时间段的操作。比如，终端设备不发送目标频域资源被占用的指示信息，和/或终端设备停止监听后续的子时间段，和/或所述终端设备不在所述第二时间段的所述目标频域资源上发送信息。比如，假设当前子时间段为sSS i,i＝0,1,…sSS Target-1。当终端设备在目标频资源上接收的信号强度指示(RSSI)，大于或等于阈值Thfast_sesning，则结束本时间段的操作。
如果终端设备在目标子时间段之前的一个子时间段上没有监听到其它终端设备发送的指示信息，且下一个子时间段不是目标子时间段，则终端设备继续在下一个子时间段监听指示信息。如果下一个子时间段是目标子时间段，则终端设备执行S505。
一种实现方式中，终端设备的收发器201可用于监听指示信息。或者，终端设备的处理器204控制收发器201监听指示信息。
S505，终端设备在目标子时间段发送目标频域资源被占用的指示信息。
当第一频域资源与第二频域资源在频域上是同一块资源(同频)时，终端设备在目标频域资源位于目标子时间段的部分发送指示信息。比如，假设目标频域资源是第二频域资源3，则终端设备在目标子时间段使用第一频域资源3发送指示信息。当第一频域资源与第二频域资源在频域上一一对应时，终端设备在目标子时间段使用目标频域资源对应的第一频域资源发送指示信息。比如，假设目标频域资源是第二频域资源3，与之对应的第一频域资源是第一频域资源1，则终端设备在目标子时间段使用第一频域资源1发送指示信息，指示第二频域资源3被占用。
所述发送的指示信息与步骤S503中监听的指示信息相同。不再赘述。
一种实现方式中，终端设备的收发器201可用于发送指示信息。或者，终端设备处理器204控制收发器201发送指示信息。
S506，终端设备在第二时间段的目标频域资源上发送信息。
终端设备在第二时间段的目标频域资源上发送的信息可以是控制信令，也可以是数据，本发明实施例不作限制。
终端设备使用目标频域资源的第二频域资源发送信息。
执行完本步骤，本时间段的操作结束。
一种可能的实现方式中，终端设备的收发器201可用于发送信息。或者，终端设备的处理器204控制收发器201发送信息。
终端设备通过执行本发明实施例所述方法，可以提前发送目标频域资源被占用的指示信息，以避免其它终端设备与自己发生碰撞。在发送目标频域资源被占用的指示信息之前，监听其它终端设备发送的目标频域资源被占用的指示信息，从而避免自己与其它终端设备发生碰撞，减少碰撞概率，降低时延。
图6给出了另一个发明实施例提供的信息发送的方法的流程示意图。该方法包括如下步骤：
S601与S501相同，在此不作赘述。
S602与S503相同，在此不作赘述。
S603，终端设备监听频域资源被占用的指示信息。
本步骤S603与S504类似。
本步骤与S504的区别是，本步骤中，终端设备事先不确定目标资源，而是监听可用频域资源集合中的多个可用频域资源是否被其它终端设备占用。因此，终端设备可以监听多个频域资源被占用的指示信息。因为多个其它终端设备可以选择同一个目标子时间段，但选择了不同的目标频域资源。所以终端设备可以同时接收到多个指示信息。多个指示信息指示多个频域资源被占用。一个指示信息指示一个频域资源被占用。本步骤中监听的指示信息中指示的被占用的频域资源可以是第二频域资源。当第一频域资源与第二频域资源在频域上是同一块资源(同频)时，终端设备在第一时间段子时间段的第一频域资源i上监听第二频域资源i被占用的指示信息，i为自然数。当第一频域资源与第二频域资源在频域上一一对应时，终端设备在第一时间段子时间段的第一频域资源i上监听第二频域资源j被占用的指示信息。第一频域资源i与第二频域资源j对应，i,j为自然数。第一频域资源i与第二频域资源j的对应关系请参考步骤S501。
为了描述方便，本发明实施例中引入候选频域资源集合。候选频域资源集是可用频域资源集合的子集。候选频域资源集合包括的频域资源可以是位于第二时间段的第二频域资源。在监听第一时间段的第一部分的第一个子时间段时，候选频域资源集合与可用频域资源集合相同。当终端设备在一个子时间段上接收到一个或多个指示信息后，将该一个或多个指示信息对应的一个或多个频域资源从可用频域资源集合中删除。此时，候选频域资源集合包括可用频域资源集合中除被删除的频域资源之外的一个或多个频域资源。在目标子时间段之前，且下一个子时间段不是目标子时间段，如果候选频域资源集合不为空，即可用频域资源集合中还有至少一个频域资源没有被其它终端占用，终端设备在下一个子时间段继续监听候选频域资源集合中的至少一个频域资源被占用的指示信息。当在目标子时间段之前的一个子时间段，候选频域资源集合为空，即可用频域资源集合中的所有的频域资源都被其它终端用户占用，终端设备结束本时间段的操作。比如，终端设备不发送频域资源被占用的指示信息，和/或终端设备停止监听后续的子时间段，和/或所述终端设备不在所述第二时间段发送信息。比如，假设可用频域资源集合包括第二频域资源1，2，3，4，目标子时间段为子时间段2。此时，候选频域资源集合也包括第二频域资源1，2，3，4。假设终端设备在子时间段0上监听到第二频域资源1，3被占用的指示信息。则在监听子时间段1时，候选频域资源集合只包括第二频域资源2，4。假设终端设备在时间子时间段1上又监听到第二频域资源2，4被占用的指示信息。则在子时间段2(即目标子时间段)，候选频域资源集合为空集，即不包括任何第二频域资源。
如果目标子时间段不是第一时间段的第一部分的第一个子时间段，则终端设备在所述目标子时间段之前的至少一个子时间段上，监听其它终端设备发送的指示信息。如果目标子时间段是第一时间段的第一部分的第一个子时间段，则终端设备不需要监听其它终端设备发送的指示信息。此时，终端设备执行S604。如果终端设备在监听当前子时间之后，候选频域资源集合不为空，且下一个子时间段为目标子时间段，则终端设备执行S604。
一种可能的实现中，终端设备的收发器201可用于监听频域资源被占用的指示信息。或者，终端设备的处理器204控制收发器201监听频域资源被占用的指示信息。
S604，终端设备从候选频域资源集合中选择一个频域资源作为目标频域资源。即，终端设备确定目标频域资源。
候选频域资源集合为所述可用频域资源的子集，且不包括被其它终端设备占用的频域资源。终端设备根据接收到的一个或多个频域资源被占用的指示信息，获得候选频域资源集合。终端设备在候选频域资源 集合包括的至少一个频域资源中选择一个目标频域资源。
本步骤与S502的区别是，本步骤中，终端设备在候选频域资源集合中选择一个频域资源作为目标频域资源，而在S502中，终端设备是在可用频域资源集合中选择一个频域资源作为目标频域资源。本步骤中，终端设备选择目标频域资源的实现方式与S502类似。不再赘述。
一种可能的实现方式中，终端设备的处理器204可用于确定目标频域资源。
S605与S505相同。
S606与S506相同。
终端设备通过执行本发明实施例提供的方法，可以提前发送目标频域资源占用指示信息，以避免其它终端设备与自己发生碰撞。在发送目标频域资源占用指示信息之前，监听其它终端设备发送的一个或多个频域资源占用指示信息，从而选择没有被其它终端设备占用的频域资源，进一步避免自己与其它终端设备发生碰撞，从而减少碰撞概率，降低时延。与图5所示的发明实施例相比，终端设备可以监听更多的频域资源，从而进一步减少碰撞概率，降低时延。
本发明实施例还提供一种装置(例如，集成电路、无线设备、电路模块等)用于实现上述方法。实现本文描述的装置可以是自立设备或者可以是较大设备的一部分。设备可以是(i)自立的IC；(ii)具有一个或多个IC的集合，其可包括用于存储数据和/或指令的存储器IC；(iii)RFIC，诸如RF接收机或RF发射机/接收机；(iv)ASIC，诸如移动站调制解调器；(v)可嵌入在其他设备内的模块；(vi)接收机、蜂窝电话、无线设备、手持机、或者移动单元；(vii)其他等等。
本发明实施例提供的方法和装置，可以应用于终端设备或网络设备(可以统称为无线设备)。该终端设备或网络设备或无线设备可以包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、以及即时通信软件等应用。并且，在本发明实施例中，本发明实施例并不限定方法的执行主体的具体结构，只要能够通过运行记录有本发明实施例的方法的代码的程序，以根据本发明实施例的传输信号的方法进行通信即可，例如，本发明实施例的无线通信的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
应理解，在本发明实施例的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实 现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者接入网设备等)执行本发明实施例各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明实施例的具体实施方式，但本发明实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明实施例的保护范围之内。

Claims (33)

  1. 一种信息发送的方法，其特征在于，包括：
    第一终端设备确定发送时间段，其中，所述发送时间段包括第一时间段，且所述第一时间段的长度小于所述发送时间段的长度，所述第一时间段包括N个子时间段，N为正整数，且N>1；
    所述第一终端设备确定目标子时间段，其中，所述目标子时间段为所述N个子时间段中的一个；
    所述第一终端设备在所述目标子时间段发送指示信息，所述指示信息用于指示占用目标频域资源，其中所述目标频域资源位于所述发送时间段。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    所述第一时间段包括第一部分和第二部分；
    所述第一部分包括N1个子时间段，用于监听和/或发送频域资源被占用的指示信息，其中N1为正整数，且N1小于所述N，所述目标子时间段位于所述第一部分；
    所述第二部分包括N2个子时间段，用于自动增益控制(Automatic Gain Control,AGC),N1+N2≤N。
  3. 根据权利要求1至2任一项所述的方法，其特征在于，所述第一终端设备在所述目标子时间段发送指示信息包括：
    所述第一终端设备在所述目标子时间段中与所述目标频域资源对应的频域资源上发送所述指示信息。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，
    所述时间段还包括：
    第二时间段，所述第二时间段位于所述第一时间段后面；
    所述第一终端设备在所述目标子时间段发送指示信息之后，还包括：
    所述第一终端设备在所述第二时间段的所述目标频域资源上发送信息。
  5. 根据权利要求1至4任一所述方法，其特征在于，所述第一终端设备发送目标频域资源被占用的指示信息之前，还包括：
    所述第一终端设备从所述发送时间段内可用频域资源集合中，选择一个频域资源作为目标频域资源；
    所述第一终端设备在所述目标子时间段之前的至少一个子时间段上，在与所述目标频域资源对应的频域资源上监听其它终端设备发送的指示信息。
  6. 根据权利要求5所述方法，其特征在于，还包括：
    如果所述第一终端设备监听到其它终端设备发送的所述指示信息，则所述第一终端设备不在所述第二时间段的所述目标频域资源上发送信息；和/或
    如果所述第一终端设备没有监听到其它终端设备发送的所述指示信息，则所述第一终端设备在所述第二时间段的所述目标频域资源上发送信息。
  7. 根据权利要求1至6任一所述方法，其特征在于，包括：
    所述第一终端设备启动计数器，所述计数器初始值C为所述第一终端设备随机选择的或者预配置的，C为自然数且0≤C≤N1；
    每经过一个子时间段，且在所述子时间段，所述第一终端设备没有监听到其它终端设备发送的所述指示信息，则所述计数器减1；
    所述第一终端设备将所述计数器减至0时对应的子时间段确定为所述目标子时间段。
  8. 根据权利要求1至4任一所述方法，其特征在于，所述第一终端设备发送所述目标频域资源被占用的指示信息之前，还包括：
    所述第一终端设备在所述目标子时间段之前的至少一个子时间段上，在所述发送时间段内可用频域资 源集合内监听其它终端设备发送的指示信息。
  9. 根据权利要求8所述方法，其特征在于，还包括：
    所述第一终端设备从候选频域资源集合中选择一个频域资源作为目标频域资源，所述候选频域资源集合为所述可用频域资源的子集，且不包括所述第一终端设备监听到的其他终端设备发送的指示信息所指示的频域资源。
  10. 根据权利要求1至9任一项所述的方法，其特征在于，所述第一终端设备在所述发送时间段之前，还包括：
    所述第一终端设备确定发送时间段窗口，其中，所述发送时间段窗口包括至少一个时间段，所述发送时间段属于所述发送时间段窗口中的一个时间段；
    所述第一终端设备从所述时间段窗口中选择一个时间段，作为所述发送时间段。
  11. 根据权利要求10所述的方法，其特征在于，还包括：
    所述第一终端设备根据待发送信息的服务质量要求，确定所述时间段窗口，其中，所述服务质量要求包括时延要求。
  12. 根据权利要求5至11所述的方法，其特征在于，所述第一终端设备确定所述目标子时间段之前，还包括：
    所述第一终端设备在所述时间段窗口之前的M个时间段内对至少一个频域资源进行监听，确定所述时间段中的所述可用频域资源集合,其中，M为正整数。
  13. 根据权利要求1至12任一项所述的方法，其特征在于，所述时间段为如下任一项：时隙、迷你时隙、子帧、和传输时间间隔(TTI)。
  14. 根据权利要求1至13任一项所述的方法，其特征在于，
    所述第一时间段包括X个第一OFDM符号，其中X为正整数；
    所述第二时间段包括Y个第二OFDM符号，其中Y为正整数。
  15. 根据权利要求14所述的方法，其特征在于，还包括：
    所述第一OFDM符号与所述第二OFDM符号子载波间隔相同；
    或者，
    所述第一OFDM符号与所述第二OFDM符号子载波间隔不同。
  16. 一种信息发送的装置，其特征在于，包括：
    处理器和与所述处理器耦合的收发器；
    所述收发器，用于发送或接收信号；
    所述处理器用于确定发送时间段，其中，所述发送时间段包括第一时间段，且所述第一时间段的长度小于所述发送时间段的长度，所述第一时间段包括N个子时间段，N为正整数，且N>1；
    所述处理器还用于选择目标子时间段，其中，所述目标子时间段为N个子时间段中的一个；
    所述处理器还用于通过所述收发器在所述目标子时间段发送指示信息，所述指示信息用于指示占用目标频域资源，其中所述目标频域资源位于所述发送时间段。
  17. 根据权利要求16所述的装置，其特征在于，还包括：
    所述第一时间段包括第一部分和第二部分；
    所述第一部分包括N1个子时间段，用于监听和/或发送频域资源被占用的指示信息，其中N1为正整数，且N1小于所述N，所述目标子时间段位于所述第一部分；
    所述第二部分包括N2个子时间段，用于自动增益控制,N1+N2≤N。
  18. 根据权利要求16至17任一项所述的装置，其特征在于，所述在所述目标子时间段发送指示信息 包括：
    所述处理器，用于通过所述收发器在所述目标子时间段中的与所述目标频域资源对应的频域资源上发送所述指示信息。
  19. 根据权利要求16至18任一项所述的装置，其特征在于，
    所述时间段还包括：
    第二时间段，所述第二时间段位于所述第一时间段后面；
    所述处理器，在所述目标子时间段发送指示信息之后，还用于在所述第二时间段的所述目标频域资源上发送信息。
  20. 根据权利要求16至19任一所述装置，其特征在于，在发送所述目标频域资源被占用的指示信息之前，还包括：
    所述处理器，用于从所述发送时间段内可用频域资源集合中，选择一个频域资源作为目标频域资源；
    所述处理器，还用于通过所述收发器，在所述目标子时间段之前的至少一个子时间段上，在与所述目标频域资源对应的频域资源上监听其它终端设备发送的指示信息。
  21. 根据权利要求20所述装置，其特征在于，还包括：
    所述处理器，用于确定如果监听到其它终端设备发送的所述指示信息，则不在所述第二时间段的所述目标频域资源上发送信息；和/或
    所述处理器，用于确定如果没有监听到其它终端设备发送的所述指示信息，则在所述第二时间段的所述目标频域资源上发送信息。
  22. 根据权利要求16至21任一所述装置，其特征在于，包括：
    所述处理器，用于启动计数器，所述计数器初始值C为所述第一终端设备随机选择的或者预配置的，C为自然数且0≤C≤N1；
    所述处理器，还用于每经过一个子时间段，且在所述子时间段，所述第一终端设备没有监听到其它终端设备发送的所述指示信息，则所述计数器减1；
    所述处理器，还用于将所述计数器减至0时对应的子时间段确定为所述目标子时间段。
  23. 根据权利要求16至19任一所述装置，其特征在于，在发送所述目标频域资源被占用的指示信息之前，还包括：
    所述处理器，用于通过所述收发器，在所述目标子时间段之前的至少一个子时间段上，在所述发送时间段内可用频域资源集合内监听其它终端设备发送的指示信息。
  24. 根据权利要求23所述装置，其特征在于，还包括：
    所述处理器，用于从候选频域资源集合中选择一个频域资源作为目标频域资源，所述候选频域资源集合为所述可用频域资源的子集，且不包括所述第一终端设备监听到的其他终端设备发送的指示信息所指示的频域资源。
  25. 根据权利要求16至24任一项所述的装置，其特征在于，在所述发送时间段之前，还包括：
    所述处理器，用于确定发送时间段窗口，其中，所述发送时间段窗口包括至少一个时间段，所述发送时间段属于所述发送时间段窗口中的一个时间段；
    所述处理器，还用于从所述时间段窗口中选择一个时间段，作为所述发送时间段。
  26. 根据权利要求25所述的装置，其特征在于，还包括：
    所述处理器，用于根据待发送信息的服务质量要求，确定所述时间段窗口，其中，所述服务质量要求包括时延要求。
  27. 根据权利要求20至26任一项所述的装置，其特征在于，在确定目标子时间段之前，还包括：
    所述处理器，用于通过所述收发器，在所述时间段窗口之前的M个时间段内对至少一个频域资源进行监听，确定所述时间段中的所述可用频域资源集合，其中，M为正整数。
  28. 根据权利要求16至27任一项所述的装置，其特征在于，所述时间段为如下任一项：时隙、迷你时隙、子帧、和传输时间间隔(TTI)。
  29. 根据权利要求16至28任一项所述的装置，其特征在于，
    所述第一时间段包括X个第一OFDM符号，其中X为正整数；
    所述第二时间段包括Y个第二OFDM符号，其中Y为正整数。
  30. 根据权利要求29所述的装置，其特征在于，还包括：
    所述第一OFDM符号与所述第二OFDM符号子载波间隔相同；
    或者，
    所述第一OFDM符号与所述第二OFDM符号子载波间隔不同。
  31. 一种计算机存储介质，其特征在于，包括：
    用于存储所述第一终端设备所用的计算机软件指令，其包括用于执行权利要求1至14任一项所述的方法所设计的程序指令。
  32. 一种处理器可读存储介质，包括指令，当所述指令在处理器上运行时，使得所述处理器执行如权利要求1至15任意一项所述的方法。
  33. 一种通信装置，其特征在于，包括：
    处理器和与所述处理器相耦合的存储器，所述处理器包括输入输出接口，所述输入输出接口用于发送信号和接收信号，所述存储器用于存储指令，所述处理器用于读取并执行存储器中的指令以控制所述通信装置执行所述权利要求1至15中任一项所述的方法。
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