WO2017028747A1 - 一种无线资源选择方法及终端设备 - Google Patents

一种无线资源选择方法及终端设备 Download PDF

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Publication number
WO2017028747A1
WO2017028747A1 PCT/CN2016/094866 CN2016094866W WO2017028747A1 WO 2017028747 A1 WO2017028747 A1 WO 2017028747A1 CN 2016094866 W CN2016094866 W CN 2016094866W WO 2017028747 A1 WO2017028747 A1 WO 2017028747A1
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Prior art keywords
resource
sensing
period
listening
signal
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PCT/CN2016/094866
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English (en)
French (fr)
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黄双红
戴博
吴栓栓
卢有雄
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中兴通讯股份有限公司
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Publication of WO2017028747A1 publication Critical patent/WO2017028747A1/zh

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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

Definitions

  • the present application relates to, but is not limited to, the field of communications, and in particular, to a radio resource selection method and a terminal device.
  • Vehicle networking refers to a large-scale system network for wireless communication and information exchange between car-X (X: car, road, pedestrian, Internet, etc.) in accordance with agreed communication protocols and data interaction standards. Communication through the Internet of Vehicles enables vehicles to achieve driving safety, improve traffic efficiency, and access convenience or entertainment information. Classification from wireless communication objects, vehicle networking communication includes three different types: Vehicle to Vehicle (V2V), Vehicle to Infrastructure (V2I), And Vehicle to Pedestrian (V2P), collectively referred to as Vehicle to Pedestrian (V2X).
  • V2V Vehicle to Vehicle
  • V2I Vehicle to Infrastructure
  • V2P Vehicle to Pedestrian
  • V2X Vehicle to Pedestrian
  • D2D refers to the transmission of service data between the user equipment (User Equipment, UE for short), which is not transmitted through the base station and the core network, and is directly transmitted by the source user equipment to the target user equipment through the air interface, as shown in Figure 1.
  • D2D can also be called Proximity Service (ProSe).
  • the LTE-based V2X communication can still adopt the manner in which the UE independently selects resources, such as randomly selecting radio resources from the resource pool to send V2X messages.
  • resources such as randomly selecting radio resources from the resource pool to send V2X messages.
  • the embodiments of the present invention provide a radio resource selection method and a terminal device, which can solve at least the technical problems in the related art that are easy to generate resource conflicts between different V2X messages and difficult to meet the reliability communication requirements of the car network.
  • An embodiment of the present invention provides a radio resource selection method, where the method includes:
  • the user equipment UE selects a target resource, where the target resource is used to send a wireless signal
  • the UE selects a target resource, including at least one of the following:
  • the target resource is randomly selected.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when the computer executable instructions are executed.
  • the embodiment of the invention further provides a terminal device, where the terminal device includes:
  • a selecting unit configured to: select a target resource, where the target resource is used to send a wireless signal
  • a sending unit configured to: send a wireless signal based on the selected target resource
  • the selection unit is configured to select a target resource by using at least one of the following methods:
  • the target resource is randomly selected.
  • the radio resource selection method and the terminal device provided by the embodiments of the present invention can select a target resource based on the interception result or the perceptual result, or randomly, and then send a radio signal on the selected target resource. In this way, it is possible to reduce the probability that the wireless signal selects the transmission resource to collide, and ensure the reliability of the communication. It also avoids the problem of persistent congestion.
  • 1 is a schematic diagram of cellular communication and D2D communication of UEs located in the same base station cell;
  • FIG. 2 is a schematic diagram of a radio resource frame structure
  • 3 is a schematic diagram of a radio resource structure
  • FIG. 4 is a schematic flowchart of a method for selecting a radio resource according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of another method for selecting a radio resource according to an embodiment of the present invention.
  • FIG. 6 is an example of dynamically adjusting a listening period according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of still another method for selecting a radio resource according to an embodiment of the present invention.
  • FIG. 9 is an example of confirming whether a selected resource is occupied according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of still another method for selecting a radio resource according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • Embodiments of the invention are applicable to cellular wireless communication systems or networks.
  • Common cellular wireless communication systems can be based on CDMA (Code Division Multiplexing Access) technology, FDMA (Frequency Division Multiplexing Access), and OFDMA (Orthogonal Frequency-Frequency Multiple Access) technology.
  • SC-FDMA Single Carrier-FDMA, single carrier frequency division multiple access
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • cellular communication system downlink (or forward link) is based on OFDMA technology
  • the uplink (or reverse link) is based on SC-FDMA multiple access technology. In the future, it is possible to support hybrid multiple access technology on one link.
  • Radio resources for communication in an OFDMA/SC-FDMA system It can be a two-dimensional form of time-frequency.
  • uplink and downlink communication resources may be divided in units of radio frames in a time direction, and each radio frame may have a length of 10 ms.
  • each time slot may include 6 or 7 OFDM or SC-FDM symbols.
  • resources may be divided into subcarriers.
  • the smallest unit of frequency domain resource allocation may be RB (Resource Block), which may correspond to a PRB of physical resources (Physical RB, physical Resource block).
  • a PRB may include 12 sub-carriers in the frequency domain, which may correspond to one slot in the time domain.
  • a resource corresponding to one subcarrier on each OFDM/SC-FDMA symbol may be referred to as a Resource Element (RE).
  • RE Resource Element
  • the user equipment UE may first need to discover the LTE network by detecting a synchronization signal (Synchronization Signal, SS), and obtain downlink frequency and time synchronization with the base station.
  • a synchronization signal Synchronization Signal, SS
  • SS Synchronization Signal
  • the UE may need to initiate random access (RA) for uplink synchronization and establish an RRC (Radio Resource Control, RRC) connection, that is, enter the RRC connection state from the RRC idle state.
  • RRC Radio Resource Control
  • the E-UTRAN can schedule the UE according to the scheduling request of the UE, and allocate the radio resource for transmitting the uplink data to the UE, and the corresponding minimum unit. For RB.
  • the UE in the RRC connected state within the coverage of the cellular network may determine the radio resource for transmitting the D2D data according to the signaling indication of the network side, and for the UE in the RRC idle state within the coverage of the cellular network, or A UE without cellular network coverage may randomly select resources for transmitting D2D data within a configured/preconfigured resource pool.
  • the embodiment of the invention provides a method for selecting a radio resource. As shown in FIG. 4, the method includes:
  • Step 41 The user equipment (UE) selects a target resource, where the target resource is used to send a wireless signal, where the UE selects a target resource, including at least one of the following: selecting a target based on a sounding result of the wireless signal Resource; select the target based on the perceived result of the occupancy signal Resources; randomly select the target resources;
  • Step 42 Send a wireless signal based on the selected target resource.
  • the method can be based on the system architecture described above.
  • a first embodiment of the present invention provides a radio resource selection method, as shown in FIG. 5, including:
  • Step 51 The UE listens to the resources in the resource pool, and obtains the interception result.
  • the interception result includes at least: occupied resources and/or idle resources.
  • Step 52 Select a target resource from the idle resources based on the interception result
  • Step 53 Send a wireless signal by using the selected target resource.
  • the resource pool may be a set of optional radio resources configured/preconfigured by the system.
  • the intercepting may refer to detecting a signal in a radio resource, and determining whether another device in the radio resource sends a radio signal.
  • the occupied resources may be radio resources occupied by signals transmitted by other UEs.
  • the listening to the resource in the resource pool, and obtaining the listening result includes: listening to the resource in the resource pool based on the listening period, and obtaining the listening result.
  • the listening period may be a preset duration, such as at least one resource period length.
  • the UE may send a signal to the target resource in all resource periods in the listening period, and select a target resource sending signal according to the interception result in different listening periods;
  • the target resource of the UE may be hopped during different resource periods in the listening period.
  • the UE randomly selects a resource it may be necessary to avoid the hopping resource corresponding to the occupied resource. .
  • the system configuration resource period may be 40 ms, and the UE may listen to the V2X message in a listening period of three resource periods, that is, 120 ms, and the listening time length may be one resource period.
  • the resource can be randomly selected in the idle resource of the resource pool to determine its Used to send V2X messages, the effective time can be 120ms for the entire listening period.
  • the UE may re-listen to the V2X message, and may randomly select resources in the idle resource for transmitting the V2X signal in the next listening period, and sequentially update the resources in turn.
  • the method may further comprise: adjusting the listening period, including at least one of the following:
  • Adjusting the listening period according to the monitoring result, and adjusting the listening period of the wireless signal according to whether the wireless resource is idle for the N times, and the N may be a positive integer greater than or equal to 2, and may include: Increase the listening or sensing period when multiple times of listening or sensing that resources are occupied;
  • Adjusting the listening period according to the service type and the cost of the data to be sent by the wireless signal may include: the larger the data overhead, the larger the listening period.
  • the adjusting the listening period of the wireless signal may include:
  • the listening period is decreased.
  • the listening period may be adjusted in combination with the moving speed of the terminal device, which may include:
  • the moving speed of the UE is detected, and the listening period is adjusted based on the moving speed, so that the listening period dynamically changes with the moving speed of the UE.
  • the adjustment of the listening period may be based on the length of the resource period. For example, when the moving speed of the UE increases by 10 km/h, the listening period decreases by one resource period; otherwise, when the UE moves. When the reduction is 10km/h, the listening period is increased by one resource period length.
  • the resource period is 20 ms, and the initial listening periods of UE1 and UE2 are both 80 ms, and the resource periods of the listening are aligned.
  • the moving speed of UE1 is decreasing, and the moving speed of UE2 is increasing.
  • the listening period of UE1 can be detected from
  • the 80ms of the listening period 1n is increased to 100ms of the listening period 1(n+1), and the listening period of UE2 can be 80 from the listening period 2n.
  • the ms is reduced to 60 ms of the listening period 2 (n+1).
  • the resource periods of the listening of UE1 and UE2 may no longer be aligned.
  • the moving speed of the UE may be compared with the preset at least one speed reference range, and the corresponding speed reference range is selected based on the moving speed of the UE, and the corresponding listening period is selected according to the selected speed reference range. That is, each speed reference range can correspond to one listening period, as shown in Table 1.
  • the UE may listen to signals sent by other UEs to obtain a listening result while transmitting the signal; and may randomly select the target resource in the idle resource according to the interception result. Controlling, by the selected target resource, the UE to send a signal in a second resource period, where the first resource period and the second resource period may be different, and the second resource period may be in a time domain Adjacent to the first resource period, and the second resource period may be later than the first resource period.
  • the UE that activates the V2X function can listen to the entire resource period before transmitting the V2X message for the first time in the initial stage, and randomly select resources in the idle resource for the next time to send the V2X message according to the interception result. You can send V2X in the second resource cycle. At the same time, in the second resource period, the UE may listen to the V2X message sent by other UEs in the subframe where the V2X message is not sent, and may randomly select the idle resource that is not occupied by the V2X message sent by other UEs. Resources for the next V2X message delivery, in the third The V2X message is sent in the source period. And can be analogized.
  • the method provided in this embodiment may further include: determining whether the occupied resource exceeds a threshold, and determining at least one of the following:
  • the data transmission time window includes: delaying selection of the radio resource when the occupied resource exceeds a threshold, and the delayed time value is a random value within a set range, or a predefined fixed value;
  • the data transmission period includes: when the occupied resource exceeds a threshold, expanding a period of selecting the wireless resource;
  • the data transmission power includes: reducing the transmission power of the signal on the radio resource when the occupied resource exceeds a threshold;
  • the data transmission code rate includes: reducing a code rate of signal transmission on the radio resource when the occupied resource exceeds a threshold.
  • the second embodiment of the present invention provides a radio resource selection method, as shown in FIG. 7, including:
  • Step 71 Perceive the occupancy signal sent by other UEs based on the sensing set to obtain a sensing result.
  • Step 72 Acquire, according to the sensing result, an idle sensing unit that does not detect the energy of the occupied signal, and use the resource corresponding to the idle sensing unit as an idle resource.
  • Step 73 Select a target resource from the idle resources.
  • Step 74 Send a wireless signal based on the selected target resource.
  • the occupancy signal may be an energy signal for identifying that a resource is occupied.
  • resources available to the communication system may be divided into: a perceptual set and a signal transmission set.
  • the sensing set and the signal sending set may each correspond to a minimum signal sending period, and the UE may send the signal once in one or more minimum signal sending periods.
  • One sensing period may include one or more minimum signal transmission periods, and for a single UE, each sensing period may perform a perception of the occupied signal.
  • the sensing set may include at least one sensing unit, where the sensing unit may be configured to send or sense an occupancy signal, and the sensing unit may correspond to a fixed size in the time domain and the frequency domain, such as an SC-FDMA in the time domain.
  • the symbol may be one subcarrier in the frequency domain and may not overlap each other.
  • the set of signal transmissions can include resource elements for transmitting signals.
  • Each sensing unit in the sensing set may have a one-to-one mapping relationship with one or more resource units in a signal sending set for transmitting a wireless signal, as shown in FIG. 8.
  • the number of resource units mapped by the sensing unit in different types of resource pools may be different. For example, in a resource pool corresponding to a service with a small data overhead, one sensing unit may be mapped to one resource unit; In a resource pool, one sensing unit can be mapped to multiple resource units.
  • the sensing unit and the resource unit may be a one-to-one mapping relationship, but the resource unit size defined in different types of resource pools may be different. For example, in a resource pool corresponding to a service with a small data cost, the defined resource unit may be smaller. In a resource pool corresponding to a service with a large data overhead, the defined resource unit may be larger.
  • the sensing, according to the sensing set, the occupant signal sent by other UEs may include: sensing, according to the sensing period, an occupation signal sent by other UEs except the UE according to the sensing set;
  • the method may further comprise: adjusting the sensing period, including at least one of the following:
  • Adjusting the sensing period according to the sensing result may include: adjusting a sensing period of the wireless signal according to whether the wireless resource is idle for a continuous N times; wherein N is a positive integer greater than or equal to 2;
  • the sensing period is adjusted according to the service type and the size of the overhead of the wireless signal carrying data.
  • Adjusting the sensing period of the wireless signal according to consecutive N times of sensing results may include:
  • the resource selection method may include: the UE first perceives the occupancy signal based on the sensing unit in the sensing set before transmitting the signal, and if the occupancy signal is not perceived, the corresponding sensing unit is considered to be idle.
  • the UE may randomly select one or more transmission occupation signals in the idle sensing unit, and may use one or more resource units corresponding to one or more sensing units that transmit the occupation signal as target resources, where the target The resource sends a wireless signal.
  • the determination method can include:
  • the first type directly receiving the selected resource unit, determining a resource unit corresponding to each signal transmission set as a target resource, transmitting a signal at the target resource, and re-sensing the occupancy signal and selecting a resource unit in a next sensing period ;or,
  • the second type randomly selects a part of the signal transmission set transmission signal in the current sensing period, and does not transmit the signal when the selected part of the signal transmission set is not selected; or, the selected resource unit in the set is not transmitted in the selected partial signal transmission group Listening to the wireless signal, if there are other UEs transmitting the wireless signal in the resource unit, the UE may no longer send a signal in the signal transmission set after the resource unit until the next sensing period re-sensing the occupied signal and selecting the resource unit Or, the selected resource unit in the partial signal transmission set that is not selected is aware of the wireless signal energy, and if it is perceived that there is signal energy in the resource unit, the resource unit may be replaced in the next signal transmission set to transmit the wireless signal. For example, a resource unit having the same time domain as the resource unit but different frequency domains transmits a wireless signal.
  • the minimum signal transmission period can be configured to be 40 ms, and the sensing period can be 4 minimum signal transmission periods, that is, 160 ms.
  • the V2X UE1 may randomly select the sensing unit s1 in the idle sensing unit in the sensing set, and select the sensing unit s1 in the idle sensing unit, and the corresponding resource unit is d1, so that the d1 in the signal sending set may be selected for the UE 1 to send the V2X message.
  • the signal transmission set of the four minimum signal transmission periods of the UE1 in the sensing period can be fixed to the D1 to transmit the V2X message; or, two of the four minimum signal transmission periods can be randomly selected in the signal.
  • the D1 resource unit of the sending set sends the V2X message; or, in the other two minimum signal sending periods that do not send the V2X message, the D1 listens to the V2X message to see if there are other UEs sending the V2X message, if any, 160ms
  • the signal transmission set after the middle abandons sending the V2X message; if the V2X message is not heard, the V2X message may continue to be sent in the selected signal transmission set; or, in the other two minimum signal transmission periods in which the V2X message is not sent, Based on the d1 interception sensing signal energy, if no signal energy is perceived on d1, the V2X message may continue to be transmitted in the selected signal transmission set, if the signal energy is perceived at d1, but is the same as the d1 subframe but the RB is different.
  • the signal transmission energy is not detected on the other resource units, and the signal transmission set after d1 in the 160 ms may randomly select the resource unit from the other resource units to transmit the V2X signal, if the d1 and the same subframe as the d1 are perceived. If there is signal energy on the RB, UE1 may abandon sending the V2X message in the current signal transmission set, and d1 in the signal transmission set after the current signal transmission set continues to perceive the signal energy, if each signal is sent in the current sensing period. In the case that none of the d1 can detect the idle resource unit, the UE1 can increase the minimum signal transmission period and/or sense. Resource selection cycle, such as minimum signal transmission cycle may be changed to 80ms, the sensing period can be changed to 320ms.
  • the third type the UE generates a random number, and in the first signal transmission set after the selection of the wireless signal is sent, the sensing signal sent by the other UE is perceived based on the sensing window corresponding to the random number in the selected resource unit.
  • the sensing signal is sent in other sensing windows. If the sensing window senses that there is a sensing signal sent by another UE, it may determine that the selected resource unit has a signal collision, and may abandon the transmission of the selected resource and the sensing signal in the subsequent sensing window; if the sensing signal is not perceived, Then, it is determined that the signal is sent on the selected resource, and the occupation signal is sent in the corresponding sensing unit.
  • the selected resource unit can be divided into M sensing windows, and the UE can generate a random number of 0 to M-1, and can select the sensing window with the index number corresponding to the generated random number for sensing, and send the sensing to other sensing windows.
  • the signal may indicate the UE's selection of the selected resource unit by sensing the energy of the signal.
  • UE1 generates a random number of 3
  • UE2 generates a random number of 1
  • UE3 generates a random number of M-2.
  • the UE2 perceives the sensing signal sent by the UE1 and the UE2 in the sensing window with the index number of 1, and can determine that the selected resource conflicts with other UEs, discards the selected resource, and stops sending the sensing. signal.
  • UE2 perceives the sensing signal sent by UE3 in the sensing window with index number 3. It can determine that the selected resource conflicts with other UEs, discards the selected resource, and stops transmitting the sensing signal.
  • UE3 is idle in the sensing window with the index number of M-2, and can determine that the selected resource unit is occupied, and the sensing unit in the corresponding sensing set sends the occupancy signal.
  • the method provided in this embodiment may further include: determining whether the occupied resource exceeds a threshold, and determining at least one of the following:
  • the data transmission time window includes: delaying selection of the radio resource when the occupied resource exceeds a threshold, and the delayed time value is a random value within a set range, or a predefined fixed value;
  • the data transmission period includes: when the occupied resource exceeds a threshold, expanding a period of selecting the wireless resource;
  • the data transmission power includes: reducing the transmission power of the signal on the radio resource when the occupied resource exceeds a threshold;
  • the data transmission code rate includes: reducing a code rate of signal transmission on the radio resource when the occupied resource exceeds a threshold.
  • the method may further comprise: performing signal detection or/and energy sensing based on the cumulative detection window or/and the perception window; or performing signal detection or/and energy perception based on the particular detection window or/and the perception window.
  • a third embodiment of the present invention provides a radio resource selection method, as shown in FIG. 10, including:
  • Step 1001 Set a sensing window at a first wireless resource location, and obtain a sensing result based on the sensing window sensing occupancy signal;
  • Step 1002 When the sensing result indicates that the energy of the occupied signal is not perceived in the sensing window, the second wireless resource is selected as the target resource; wherein the second wireless resource is available in the time domain with the first wireless The resources are adjacent, may be randomly selected or specified in the frequency domain; or the first The radio resource and the second radio resource may be respectively in adjacent resource periods or perceptual periods, and the offsets in the resource period or the perceptual period may be the same;
  • Step 1003 Send a wireless signal based on the selected target resource.
  • the sensing window may be a specified period of time.
  • the second radio resource is discarded; if there is no sensing in the sensing window of the first radio resource. If there is energy of the occupied signal sent by the other UE, it is determined that the second wireless resource is occupied as the second wireless resource, and the occupied signal is sent in the corresponding sensing unit.
  • the foregoing solution may be a step of a cyclic operation, that is, the next radio resource adjacent to the second radio resource in the time domain may be set as the first radio resource again, and the step 1001 - step 1003 is repeatedly performed.
  • the UE is aware of the occupied signal. If the energy of the occupied signal is perceived in the sensing window, the wireless resource may not be selected, and the occupied signal may continue to be perceived; If the energy of the occupied signal is not perceived in the sensing window, the next subframe of the subframe in which the sensing window is located may be selected, or the subframe with the same offset as the subframe in which the sensing window is located in the next resource period may be selected for transmitting wireless. signal.
  • the offset of the subframe here may refer to the offset of the subframe from the beginning of the resource period in the resource period.
  • the fourth embodiment provides a radio resource selection method, where the method includes:
  • the UE selects a target resource, where the target resource is used to send a wireless signal, where the UE selects a target resource, and may include at least one of: selecting a target resource based on a sounding result of the wireless signal; Perceiving the result, selecting the target resource; randomly selecting the target resource;
  • a wireless signal is transmitted based on the selected target resource.
  • the sending the wireless signal based on the selected target resource may include: competing based on the selected target resource, and sending the wireless signal on the target resource when the competition is successful.
  • the UE Before transmitting the wireless signal, the UE may listen to other wireless signals sent by other UEs based on the target resource, and if the other wireless signals are detected, the UE may not send a signal and reselect the resources; If the other wireless signals are not heard, the wireless resources may be fixedly transmitted using the wireless resources during a resource update period.
  • the resource update period may include one of the following: a transmission period of a wireless signal; a listening period; a period of configuring a radio resource.
  • the resource update period may be one or more wireless signal transmission periods, or may be one or more system configurations/preconfigured resource periods, or may be less than a resource period.
  • UE1 may randomly select resources in the resource pool before transmitting the V2X message, and listen to the selected resources. If no other V2X messages are heard, the UE may occupy the selection within the resource update period.
  • the resource sends a V2X message; if it hears other V2X messages, it can abandon sending the V2X message and re-randomly select the resource in the next V2X transmission cycle and listen until the selected resource is idle, then send the V2X message.
  • the contenting is performed based on the selected target resource.
  • the sending the wireless signal in the target resource may include at least one of the following:
  • Listening to the other wireless signal at the target resource to obtain a listening result when the listening result indicates that the target resource is idle, determining to send the wireless signal at the target resource; and when the interception result represents the target When the resource has the other wireless signal, determining that the wireless signal is not sent by the target resource;
  • the occupancy signal may be an energy signal used to identify that the corresponding resource is occupied.
  • the UE randomly selects the radio resource in the available resources of the system, and is configured to send a radio signal, and before the radio signal is sent, the UE may sense the radio signal or the occupation signal sent by the other UE based on the radio resource, and the sensing window.
  • the length of the time domain may be less than the length of the radio resource time domain (such as 1 ms).
  • the radio resource may be fixedly used to transmit the radio signal during the resource update period; if the A radio resource has signal energy, and other frequency resources in the same time domain, such as an RB, are idle (no signal energy), and may not transmit a signal in the radio resource, but reselect a resource to transmit a signal in other frequency resources in the same time domain; When the radio resource and other frequency resources in the same time domain are aware of the signal energy, the UE may re-randomly select the resource in the next signal transmission period, and perform sensing until the selected resource is idle, and then send the wireless signal. .
  • the UE reselects resources in each signal transmission period in a random selection manner, and the UE sends a signal using the selected resource in each signal transmission period.
  • the signal transmission period can be less than the resource period or one or more resource periods.
  • the UE randomly selects resources in each resource update period, and performs contention based on the selected resources to determine whether to send a signal on the selected resource before transmitting the wireless signal.
  • the determining method may include: dividing the selected resource into N sensing windows, the UE generating a random number of 0 to N-1, and sensing whether the sensing window corresponding to the index number and the random number has a sensing signal sent by another UE, The sensing signal is sent in the remaining other sensing windows. If the sensing signal is perceived, the selected resource may be discarded, and the sensing signal may be stopped to be re-selected; if the sensing is idle, the selected resource may be occupied, and the wireless signal may be transmitted in the next resource cycle.
  • the resource update period is 3 resource periods
  • UE1 and UE2 randomly select the same resource, and perform sensing based on the perception window divided in the selected resource to confirm whether the selected resource is occupied.
  • the method of the sensing can be the same as the method shown in FIG. 6. If the UE1 generates the random number 3 and the UE2 generates the random number 1, the UE2 can first perceive the sensing signal sent by the UE1, and abandon the occupied resource, and the UE1 is in the index number. If the result of the perceptual window perception of 3 is idle (in which case UE2 has not sent the perceptual signal), it may be determined that the selected resource is occupied. The foregoing confirmation may be performed in the first resource period of the resource update period. In the second and third resource periods, UE1 may send a V2X message on the selected resource, and UE2 may not be in the selected resource. The source sends a message.
  • the UE may adjust the radio signal transmission period according to the result of the interception or sensing in the stage of resource selection and/or confirmation of whether the radio signal is transmitted by the selected resource.
  • the adjusting may include: if the result of the N consecutive listening or sensing is not idle, increasing the sending period of the wireless signal, that is, increasing the time interval for transmitting the wireless signal twice consecutively; or, if the M times are consecutive The result of listening or sensing is idle, and when the transmission period of the wireless signal is not the minimum period, the wireless signal transmission period is reduced.
  • N and M are both configured/preconfigured positive integers, and M and N may not be equal, such as M is greater than N.
  • the UE may adjust the period of listening or sensing according to the result of the listening or sensing. If the result of continuous Q listening or sensing is that no idle resources are available, or there is a resource conflict, the period in which the UE is listening or sensing may be increased; or, if it is not the minimum listening or sensing period, if If the UE continuously listens or perceives the result of P times, there are idle resources, or there is no conflict, and the period of listening or sensing can be appropriately reduced. Where P and Q can be positive integers of configuration/configuration.
  • the V2X UE performs sensing and selecting resources every 80 ms, if it is perceived to be empty. If it is idle, the resource may be selected to send a V2X message in the resource that is determined to be idle; if there is no idle resource, the sensing may be re-perceived until the resource is selected for sending the V2X message. If there are no idle resources perceived for 3 consecutive times, the period of perception may be increased, such as adjusting the perceived period to every 120 ms, or per 160 ms.
  • the selection of the wireless resource or the sending of the wireless signal may be adjusted, which may include:
  • the delay time value is a random value within a set range, or a predefined fixed value
  • the code rate of the wireless signal transmission is the code rate of the wireless signal transmission.
  • the V2X UE may select a resource for transmitting a V2X message by listening to a V2X message sent by other UEs, and update the selected resource by listening for the result.
  • the listening period is 320ms
  • the sending period of the V2X message is 80ms
  • the threshold for occupying resources is set to 70%.
  • the UE may choose to delay sending the V2X message, and the delay time may be one resource period.
  • the V2X message is sent once from each original resource cycle to a V2X message every 2 resource cycles.
  • the transmission power of the V2X message can be reduced for transmission.
  • the bit rate of the V2X message can be reduced for transmission.
  • the UE may select the radio resource based on the radio signal detection or based on the occupancy signal energy, and obtain the detection or the perceived result in different manners, which may include:
  • a V2X UE may select a resource for transmitting a V2X message by sensing the result of the occupancy signal energy.
  • the sensing result is determined based on two consecutive sensing windows, for example, when the condition that the sensing result is an idle resource in the two sensing windows is satisfied, the sensing result is regarded as an idle resource, and the resource is selected in the idle resource for sending the V2X.
  • the perceived result may also be determined based on the perceived result of a single or multiple (more than two) perception windows, and the resource that sent the V2X message is selected.
  • a sixth embodiment of the present invention provides a terminal device, as shown in FIG.
  • the selecting unit 1101 is configured to: select a target resource, where the target resource is used to send a wireless signal;
  • the sending unit 1102 is configured to: send a wireless signal based on the selected target resource;
  • the selection unit 1101 is configured to select a target resource by using at least one of the following manners:
  • the target resource is randomly selected.
  • the selecting unit 1101 is configured to: listen to a resource in the resource pool, and obtain a listening result, where the listening result includes at least: an occupied resource and/or an idle resource; Listen to the result and select the resource target resource from the idle resources.
  • the interception in this embodiment may refer to detecting a signal in a radio resource, and determining whether another device in the radio resource sends a radio signal.
  • the selecting unit 1101 is configured to: listen to resources in the resource pool based on a listening period, and obtain a listening result;
  • the selecting unit is configured to: adjust the listening period, including at least one of the following:
  • the listening period is adjusted according to the service type and the size of the overhead of the wireless signal carrying data.
  • the selecting unit 1101 is configured to: according to the sensing set, perceive an occupancy signal sent by another UE, to obtain a sensing result; and based on the sensing result, acquire an idle sensing unit that does not perceive the energy of the occupied signal, Determining, by the idle sensing unit, a resource as an idle resource; selecting a target resource from the idle resource;
  • Each of the sensing units in the sensing set and the one or more resource units in the resource set for transmitting the wireless signal may have a one-to-one mapping relationship.
  • the selecting unit 1101 is configured to: according to the sensing period, perceive an occupancy signal sent by other UEs except the UE according to the sensing set; and correspondingly, adjust the sensing period, including at least one of the following :
  • the sensing period is adjusted according to the service type and the size of the overhead of the wireless signal carrying data.
  • the selecting unit 1101 is configured to: set a sensing window at the first wireless resource location, acquire a sensing result based on the sensing window sensing occupancy signal; and when the sensing result representation is not perceived in the sensing window
  • the second radio resource is selected as the target resource, where the second radio resource is adjacent to the first radio resource in the time domain, randomly selected in the frequency domain, or specifies a frequency domain.
  • the selecting unit 1101 is further configured to: determine whether the occupied resource exceeds a threshold, and determine at least one of the following:
  • the data transmission time window includes: delaying selection of the radio resource when the occupied resource exceeds a threshold, and the delayed time value is a random value within a set range, or a predefined fixed value;
  • the data transmission period includes: when the occupied resource exceeds a threshold, expanding a period of selecting the wireless resource;
  • the data transmission power includes: reducing the transmission power of the signal on the radio resource when the occupied resource exceeds a threshold;
  • the data transmission code rate includes: reducing a code rate of signal transmission on the radio resource when the occupied resource exceeds a threshold.
  • the selecting unit 1101 is further configured to:
  • Signal detection or/and energy perception is performed based on a particular detection window or/and perception window.
  • the selecting unit 1101 is configured to randomly select resources within a set of available resources of the system based on a resource update period;
  • the resource update period includes one of the following: a period of wireless signal transmission; a listening or sensing period; and a period of radio resource configuration.
  • the selecting unit 1101 is configured to: compete according to the selected target resource, and send the wireless signal at the target resource when the contention succeeds.
  • the selecting unit 1101 is configured to: perform at least one of the following processes:
  • Listening to the other wireless signal at the target resource to obtain a listening result when the listening result indicates that the target resource is idle, determining to send the wireless signal at the target resource; and when the interception result represents the target When the resource is an occupied resource (if any other wireless signal is present), determining that the wireless signal is not sent by the target resource;
  • Perceiving the other wireless signal or/and the occupied signal to obtain a perceived result and determining, when the sensing result indicates that the target resource is idle, determining to send the wireless signal in the wireless resource; When the target resource has the other wireless signal or/and the occupied signal, it is determined that the wireless signal is not transmitted at the wireless resource.
  • the selecting unit 1101 is further configured to: adjust a sending period and/or a sensing period of the wireless signal according to whether the wireless resource is idle for a continuous N times; wherein N is a positive integer greater than or equal to 2. .
  • the selecting unit 1101 is configured to increase a sending period and/or a sensing period when the consecutive N listening results respectively indicate that the target resource includes other wireless signals or/and an occupied signal.
  • the transmission period and/or the perceptual period are reduced.
  • the selecting unit 1101 is further configured to: determine a first time length of sending the wireless signal at the target resource;
  • the first time length includes: a period of wireless signal transmission; or a period of listening or sensing; or a period of radio resource configuration.
  • the selecting unit is further configured to: determine whether the occupied resource exceeds a threshold, and determine at least one of the following:
  • the data transmission time window includes: delaying transmission of the wireless signal when the occupied resource exceeds a threshold, and the delayed time value is a random value within a set range, or a predefined fixed value;
  • the data transmission period includes: expanding a period of sending the wireless signal when the occupied resource exceeds a threshold;
  • the data transmission power includes: reducing the transmission power of the wireless signal when the occupied resource exceeds a threshold;
  • the data transmission code rate includes: decreasing the code rate of the wireless signal transmission when the occupied resource exceeds a threshold.
  • the selection unit is configured to perform signal detection or/and energy perception based on the cumulative detection window or/and the perception window; or perform signal detection or/and energy perception based on the specific detection window or/and the perception window.
  • Embodiment 7 of the present invention provides a computer readable storage medium storing computer executable instructions, which are implemented when the computer executable instructions are executed.
  • the disclosed apparatus and method can be implemented in other manners.
  • the device embodiments described above may be merely exemplary.
  • the division of the modules may be only a logical function division.
  • there may be another division manner for example, multiple modules or components may be combined. Or can be integrated into another The system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the various components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or modules, and may be electrical, mechanical or other forms. of.
  • the modules described above as separate components may or may not be physically separated.
  • the components displayed as modules may or may not be physical modules, that is, may be located in one place or distributed to multiple network modules; Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the functional modules in the embodiments of the present invention may all be integrated into one processing module, or different modules may be separately used as one module, or two or more modules may be integrated into one module; the above integrated module It can be implemented in the form of hardware or in the form of hardware plus software function modules.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • the device/function module/functional unit in the above embodiment When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the radio resource selection method and the terminal device provided by the embodiments of the present invention can select a target resource based on the interception result or the perceptual result, or randomly, and then send a radio signal on the selected target resource. In this way, it is possible to reduce the probability that the wireless signal selects the transmission resource to collide, and ensure the reliability of the communication. It also avoids the problem of persistent congestion.

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Abstract

一种无线资源选择方法包括：用户设备UE选择目标资源，其中，所述目标资源用于发送无线信号；基于选择的所述目标资源发送无线信号；其中，所述UE选择目标资源，包括以下至少之一：基于对无线信号的侦听结果，选择目标资源；基于占用信号的感知结果，选择所述目标资源；随机选择所述目标资源。

Description

一种无线资源选择方法及终端设备 技术领域
本申请涉及但不限于通信领域，尤其是一种无线资源选择方法及终端设备。
背景技术
车联网是指按照约定的通信协议和数据交互标准，在车-X(X：车、路、行人及互联网等)之间，进行无线通讯和信息交换的大系统网络。通过车联网通信可以使车辆获得行驶安全、提高交通效率以及获得便利或娱乐信息。从无线通信的对象来分类，车联网通信包括三种不同类型：车辆与车辆之间通信(Vehicle to Vehicle，简称为V2V)，车辆与路边设备之间通信(Vehicle to Infrastructure，简称V2I)，以及车辆与行人之间通信(Vehicle to Pedestrian，简称V2P)，统称为车辆与X之间通信(Vehicle to Pedestrian，简称V2X)。
3GPP(3rd Generation Partnership Project)组织已经开始基于LTE(Long Term Evolution，长期演进)的V2X通信研究，其中，基于设备到设备(Device-to-Device，简称为D2D)的通信方法就是V2X标准实现的方式之一。D2D是指在有业务传输的用户设备(User Equipment，简称为UE)之间，业务数据不经过基站和核心网的转发，直接由源用户设备通过空口传输给目标用户设备，如图1所示，D2D也可称之为邻近服务(Proximity Service，简称ProSe)。
对于车联网，基于LTE的V2X通信仍然可以采用UE自主选择资源的方式，如：随机地从资源池选择无线资源以发送V2X消息。但是，鉴于车联网中UE数量较大、移动速度高，如果仅用随机选择的方式，容易产生不同V2X消息之间的资源冲突，难以满足车联网的可靠性通信要求。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求 的保护范围。
本发明实施例提供一种无线资源选择方法及终端设备，能够至少解决相关技术中存在的容易产生不同V2X消息之间的资源冲突，难以满足车联网的可靠性通信要求的技术问题。
本发明实施例提供了一种无线资源选择方法，所述方法包括：
用户设备UE选择目标资源，其中，所述目标资源用于发送无线信号；
基于选择的所述目标资源发送无线信号；
其中，所述UE选择目标资源，包括以下至少之一：
基于对无线信号的侦听结果，选择所述目标资源；
基于占用信号的感知结果，选择所述目标资源；
随机选择所述目标资源。
本发明实施例还提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述无线资源选择方法。
本发明实施例还提供了一种终端设备，所述终端设备包括：
选择单元，设置为：选择目标资源，其中，所述目标资源用于发送无线信号；
发送单元，设置为：基于选择的所述目标资源发送无线信号；
其中，所述选择单元是设置为：采用以下方式至少之一选择目标资源：
基于对无线信号的侦听结果，选择所述目标资源；
基于占用信号的感知结果，选择所述目标资源；
随机选择所述目标资源。
本发明实施例所提供的无线资源选择方法及终端设备，能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率，并且保证通信的可靠性。还可以避免出现持续拥塞的问题。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为位于同一基站小区的UE的蜂窝通信和D2D通信示意图；
图2是无线资源帧结构的示意图；
图3是无线资源结构的示意图；
图4是根据本发明实施例的一种无线资源选择方法流程示意图；
图5为根据本发明实施例的另一种无线资源选择方法流程示意图；
图6为本发明实施例提供的动态调整侦听周期的示例；
图7为根据本发明实施例的又一种无线资源选择方法流程示意图；
图8为本发明实施例基于感知单元的资源选择方法示例；
图9为本发明实施例确认是否占用所选资源的示例；
图10为根据本发明实施例的又一种无线资源选择方法流程示意图；
图11为本发明实施例终端设备组成结构示意图。
本发明的较佳实施方式
下面结合附图对本发明的实施方式进行描述。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的各种方式可以相互组合。
本发明实施例适用于蜂窝无线通信系统或网络。常见的蜂窝无线通信系统可以基于CDMA(Code Division Multiplexing Access，码分多址)技术、FDMA(Frequency Division Multiplexing Access，频分多址)技术、OFDMA(Orthogonal-FDMA，正交频分多址)技术、SC-FDMA(Single Carrier-FDMA，单载波频分多址)技术，等。例如，3GPP(3rd Generation Partnership Project)LTE(Long Term Evolution，长期演进)/LTE-A(LTE-Advanced，高级长期演进)蜂窝通信系统下行链路(或称为前向链路)基于OFDMA技术，上行链路(或称为反向链路)基于SC-FDMA多址技术。未来则有可能在一个链路上支持混合的多址技术。
在OFDMA/SC-FDMA系统中，用于通信的无线资源(Radio Resource) 可以是时-频两维的形式。例如，对于LTE/LTE-A系统来说，上行和下行链路的通信资源在时间方向上都可以是以无线帧(radio frame)为单位划分，每个无线帧(radio frame)长度可为10ms，可包含10个长度为1ms的子帧(sub-frame)，每个子帧可包括长度为0.5ms的两个时隙(slot)，如图2所示。而根据循环前缀(Cyclic Prefix，CP)的配置不同，每个时隙可以包括6个或7个OFDM或SC-FDM符号。
在频率方向，资源可以以子载波(subcarrier)为单位划分，在通信中，频域资源分配的最小单位可以是RB(Resource Block，资源块)，可对应物理资源的一个PRB(Physical RB，物理资源块)。一个PRB在频域可包含12个子载波(sub-carrier)，可对应于时域的一个时隙(slot)。在每个OFDM/SC-FDMA符号上的对应一个子载波的资源可称为资源单元(Resource Element，RE)。如图3所示。
在LTE/LTE-A蜂窝通信系统中，用户设备UE首先可以需要通过检测同步信号(Synchronization Signal，SS)发现LTE网络，获得与基站的下行频率和时间同步。当UE有上行数据传输时，可以需要发起随机接入(Random Access，RA)进行上行同步并建立RRC(Radio Resource Control，RRC)连接，即从RRC空闲(Idle)状态进入RRC连接(Connected)状态。网络侧(E-UTRAN，Evolved Universal Terrestrial Radio Access Network，演进的通用陆地无线接入网络)可根据UE的调度请求对UE进行调度，为UE分配用于发送上行数据的无线资源，对应的最小单位为RB。
在D2D通信中，在蜂窝网络覆盖内的处于RRC连接状态的UE可以根据网络侧的信令指示确定用于发送D2D数据的无线资源，而对于蜂窝网络覆盖内的处于RRC空闲状态的UE，或者无蜂窝网络覆盖的UE，则可以在配置/预配置的资源池内随机地选择资源用于发送D2D数据。
本发明实施例提供了一种无线资源选择方法，如图4所述，所述方法包括：
步骤41：用户设备(UE)选择目标资源，其中，所述目标资源用于发送无线信号；其中，所述UE选择目标资源，包括以下至少之一：基于对无线信号的侦听结果，选择目标资源；基于占用信号的感知结果，选择所述目标 资源；随机选择所述目标资源；
步骤42：基于选择的所述目标资源发送无线信号；
所述方法可基于上述系统架构。
下面结合上述方案，提供说明。
实施例一
本发明实施例一提供了一种无线资源选择方法，如图5所示，包括：
步骤51：UE对资源池中的资源进行侦听，获取到侦听结果，所述侦听结果中至少包括：占用资源和/或空闲资源；
步骤52：基于所述侦听结果，从空闲资源中选择目标资源；
步骤53：通过选择的所述目标资源发送无线信号。
这里，所述资源池可为系统配置/预配置的可选无线资源集合。
所述侦听可以是指在无线资源进行信号检测，判断无线资源中是否有其他设备发送无线信号。
所述占用资源可为被其他UE发送的信号占用的无线资源。
可选地，上述步骤51中，所述对资源池中的资源进行侦听，获取到侦听结果，包括：基于侦听周期，对资源池中的资源进行侦听，获取到侦听结果。
其中，所述侦听周期可为预设时长，比如连续至少一个资源周期长度。
基于选择的所述目标资源发送无线信号例如：在选择的所述目标资源发送无线信号。所述UE在侦听周期内的全部资源周期可都在所述目标资源发送信号，而在不同的侦听周期，可根据侦听结果选择目标资源发送信号；
或者，所述UE的目标资源可在侦听周期内的不同资源周期间跳变，在这种情况下，所述UE随机选择资源时可以需要避开已被占用的资源所对应的跳变资源。
例如，在车联网通信中，系统配置资源周期可为40ms，UE可以以3个资源周期即120ms为侦听周期侦听V2X消息，侦听时间长度可为一个资源周期。可根据侦听结果，在资源池的空闲资源中随机选择资源，确定其 用于发送V2X消息，有效时间可为整个侦听周期120ms。120ms之后UE可重新侦听V2X消息，并可在空闲资源中随机选择资源用于在下一个侦听周期中发送V2X信号，依次重复更新资源。
相应地，所述方法还可包括：对侦听周期进行调整，包括以下至少之一：
根据所述UE移动速度调整侦听周期；
根据侦听结果调整侦听周期，可以为根据连续N次侦听所述无线资源是否为空闲，调整所述无线信号的侦听周期；其中，N可为大于等于2的正整数，可包括：当多次侦听或感知到资源都是被占用时，增大侦听或感知周期；
根据所述发送无线信号承载数据的业务类型和开销大小调整侦听周期，可包括：数据开销越大，则侦听周期越大。
其中，根据连续N次侦听结果，调整所述无线信号的侦听周期可包括：
当连续N次侦听结果均表征所述目标资源中包括有其它无线信号或/和占用信号时，增大侦听周期；
或者，当连续N次侦听结果均表征所述目标资源对应的无线资源为空闲时，减小侦听周期。
在上述步骤基础上，可结合终端设备的移动速度对侦听周期进行调整，可包括：
检测得到UE的移动速度，基于所述移动速度调整所述侦听周期，使得侦听周期随着UE的移动速度动态变化。
本实施例中，所述侦听周期的调整可以以资源周期长度为粒度，比如，当UE的移动速度增加10km/h时，侦听周期减小一个资源周期长度；反之，当UE的移动速度减少10km/h时，侦听周期增加一个资源周期长度。
如图6所示，假设资源周期为20ms，UE1和UE2的初始侦听周期都是80ms，且侦听的资源周期对齐。而UE1的移动速度在减小，UE2移动速度在增加；根据动态调整原则，当移动速度的增加或减小的差值超过一定范围比如大于10km/h时，则UE1的侦听周期可从侦听周期1n的80ms增加到侦听周期1(n+1)的100ms，UE2的侦听周期可从侦听周期2n的80 ms减小到侦听周期2(n+1)的60ms。调整后UE1和UE2的侦听的资源周期可不再对齐。
或者，可将UE的移动速度与预设的至少一个速度参考范围进行对比，基于UE的移动速度选取对应的速度参考范围，根据选取的所述速度参考范围选取对应的侦听周期。即，每一个速度参考范围均可对应一个侦听周期，如表1所示。
表1
序号 移动速度(km/h) 侦听周期(ms)
0 0～30 {1120，960}
1 30～60 {960，800}
2 60～90 {800，640}
3 90～120 {640，480}
4 120～150 {480，320}
5 150～180 {320，160}
可选地，另外一种方法，在第一资源周期中，UE在发送信号的同时，可侦听其他UE发送的信号得到侦听结果；可根据侦听结果在空闲资源中随机选择目标资源，可基于选择的所述目标资源控制所述UE在第二资源周期中发送信号；其中，所述第一资源周期与所述第二资源周期可以不同，所述第二资源周期可在时域上与所述第一资源周期相邻，并且所述第二资源周期可晚于所述第一资源周期。
例如，在车联网系统中，激活V2X功能的UE在初始阶段第一次发送V2X消息之前，可侦听整个资源周期，根据侦听结果在空闲资源中随机选择资源用于下一次发送V2X消息，即可在第二个资源周期中发送V2X。同时，在第二个资源周期中，所述UE可在没有发送V2X消息的子帧处，侦听其他UE发送的V2X消息，可在没有被其他UE发送的V2X消息占用的空闲资源中随机选择资源，用于下一次V2X消息发送，即可在第三个资 源周期中V2X消息发送。并可依次类推。
可选地，本实施例中提供的方法还可以包括：判断占用资源是否超过阈值，并确定以下至少之一：
数据传输时间窗，包括：当被占用的资源超过阈值时，延迟选择所述无线资源，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
数据传输周期，包括：当被占用的资源超过阈值时，扩大选择所述无线资源的周期；
数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号的发送功率；
数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号发送的码率。
可见，通过采用上述方案，就能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率；还以及避免出现持续拥塞的问题。
实施例二
本发明实施例二提供了一种无线资源选择方法，如图7所示，包括：
步骤71：基于感知集合感知其他UE发送的占用信号，得到感知结果；
步骤72：基于所述感知结果，获取到未感知到占用信号的能量的空闲感知单元，将所述空闲感知单元对应的资源作为空闲资源；
步骤73：从所述空闲资源中选择目标资源；
步骤74：基于选择的所述目标资源发送无线信号。
这里，所述占用信号可以为用于标识资源被占用的能量信号。
本实施例中，可以将所述通信系统可用的资源分成：感知集合和信号发送集合。
其中，所述感知集合和信号发送集合均可对应一个最小信号发送周期，UE可以在一个或多个最小信号发送周期发送一次信号。
一个感知周期可包括一个或者多个最小信号发送周期，对于单个UE，每个感知周期可进行一次对占用信号的感知。所述感知集合中可包括有至少一个感知单元；其中，所述感知单元可用于发送或感知占用信号，感知单元可在时域和频域对应固定大小，比如时域上可为一个SC-FDMA符号，频域上可为一个子载波，并且相互之间可不重叠。
所述信号发送集合可包括用于发送信号的资源单元。
所述感知集合中每个感知单元与用于发送无线信号的信号发送集合中的一个或多个资源单元可为一一对应的映射关系，如图8所示。在不同类型的资源池中感知单元对应映射的资源单元个数可以不同，比如在数据开销小的业务对应的资源池中，一个感知单元可映射到一个资源单元；在数据开销大的业务对应的资源池中，一个感知单元可映射到多个资源单元。或者，感知单元与资源单元可为一一映射关系，但不同类型的资源池中定义的资源单元大小可不同，比如在数据开销较小的业务对应的资源池中，定义的资源单元可以较小；在数据开销较大的业务对应的资源池中，定义的资源单元可以较大。
所述基于感知集合感知其他UE发送的占用信号，可包括：根据感知周期，基于感知集合感知除所述UE外的其他UE发送的占用信号；
相应地，所述方法还可包括：对所述感知周期进行调整，包括以下至少之一：
根据所述UE移动速度的变化调整感知周期；
根据感知结果调整感知周期，可包括：根据连续N次感知所述无线资源是否为空闲，调整所述无线信号的感知周期；其中，N为大于等于2的正整数；
根据所述发送无线信号承载数据的业务类型和开销大小调整感知周期。
根据连续N次感知结果，调整所述无线信号的感知周期可包括：
当连续N次感知结果均表征所述目标资源中包括有其它无线信号或/和占用信号时，增大感知周期；
或者，当连续N次感知结果均表征所述目标资源对应的无线资源为空闲 时，减小感知周期。
资源选择方法可以包括：UE在发送信号之前先在感知集合基于感知单元感知占用信号，如果没有感知到占用信号，则认为对应感知单元为空闲。所述UE可在空闲的感知单元中随机选择一个或多个发送占用信号，以及可将发送占用信号的一个或多个感知单元所对应的一个或多个资源单元作为目标资源，在所述目标资源发送无线信号。
在按照上述方法选择了用于发送无线信号的资源单元之后，可确定是否在所选的资源单元发送无线信号。确定方法可包括：
第一种：直接接收所选择的资源单元，确定在每个信号发送集合中所对应的资源单元作为目标资源，在所述目标资源发送信号，以及在下一个感知周期重新感知占用信号以及选择资源单元；或者，
第二种：在当前感知周期中随机选择部分的信号发送集合发送信号，没有被选择的部分信号发送集合则不发送信号；或者，在没有被选择的部分信号发送集合中的所选择的资源单元侦听无线信号，如果有其他UE在该资源单元发送无线信号，则可所述UE在该资源单元之后的信号发送集合中不再发送信号，直到下一个感知周期重新感知占用信号以及选择资源单元；或者，在没有被选择的部分信号发送集合中的所选择的资源单元感知无线信号能量，如果感知到在所述资源单元有信号能量，则可在下一个信号发送集合中更换资源单元发送无线信号，比如在与所述资源单元时域相同但频域不同的资源单元发送无线信号。
例如，在车联网通信中，最小信号发送周期可配置为40ms，感知周期可为4个最小信号发送周期，即160ms。V2X UE1可在感知集合基于感知单元感知占用信号，在空闲的感知单元中随机选择感知单元s1，与之对应的资源单元为d1，即可选择信号发送集合中的d1用于UE 1发送V2X消息。按照上述两种方法，UE1在感知周期内的4个最小信号发送周期的信号发送集合都可固定在d1发送V2X消息；或者，可在4个最小信号发送周期中随机选择2个，在其信号发送集合的d1资源单元发送V2X消息；或者，可在另外2个没有发送V2X消息的最小信号发送周期中，基于d1侦听V2X消息，看是否有其他UE发送V2X消息，如果有则可在该160ms 中之后的信号发送集合放弃发送V2X消息；如果没有侦听到V2X消息，则可继续在选择的信号发送集合发送V2X消息；或者，可在另外2个没有发送V2X消息的最小信号发送周期中，基于d1侦听感知信号能量，如果在d1上没有感知到信号能量，则可继续在选择的信号发送集合发送V2X消息，如果在d1感知到有信号能量，而在与d1子帧相同但RB不同的其它资源单元上没有感知到信号能量，则可在该160ms中d1之后的信号发送集合从所述其它资源单元中随机选择资源单元发送V2X信号，如果感知到d1以及与d1相同子帧的其它RB上都有信号能量，则UE1可放弃在当前信号发送集合发送V2X消息，在当前信号发送集合之后的信号发送集合中的d1继续感知信号能量，如果在当前感知周期中在每个信号发送集合中基于d1都不能感知到有空闲的资源单元，则UE1可增大最小信号发送周期和/或感知周期进行资源选择，比如可将最小信号发送周期改为80ms，可将感知周期改为320ms。
第三种：UE生成一个随机数，在选择用于发送无线信号之后的第一个信号发送集合中，基于选择的资源单元中对应所述随机数的感知窗，感知其他UE发送的感知信号，而在其它的感知窗发送感知信号。如果在感知窗感知到有其他UE发送的感知信号，则可判断所选择的资源单元存在信号冲突，并可放弃占用所选资源以及后面感知窗中感知信号的发送；如果没有感知到感知信号，则可确定在所选资源发送信号，并在对应感知单元发送占用信号。
如图9所示，假设UE1、UE2和UE3通过在感知集合对感知单元进行感知，选择了同一个资源单元，在感知集合之后的第一个信号发送集合，基于所选择的资源单元进行感知以确认其是否存在信号冲突。所选资源单元可划分为M个感知窗，UE可生成一个0到M-1的随机数，并可选择索引号与生成随机数相对应的感知窗进行感知，而在其它感知窗可发送感知信号，可通过感知信号的能量指示UE对于所选择的资源单元的选择。示例中UE1生成随机数为3，UE2生成随机数为1，UE3生成随机数为M-2。这样UE2在索引号为1的感知窗感知到UE1和UE2发送的感知信号，可判定在所选资源与其他UE有冲突，放弃占用所选资源，并停止发送感知 信号。同样，UE2在索引号为3的感知窗感知到UE3发送的感知信号，可判定在所选资源与其他UE有冲突，放弃占用所选择的资源，并停止发送感知信号。而UE3在索引号为M-2的感知窗感知结果为空闲，可确定占用所选资源单元，并在对应感知集合中的感知单元发送占用信号。
可选地，本实施例提供的方法还可以包括：判断占用资源是否超过阈值，并确定以下至少之一：
数据传输时间窗，包括：当被占用的资源超过阈值时，延迟选择所述无线资源，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
数据传输周期，包括：当被占用的资源超过阈值时，扩大选择所述无线资源的周期；
数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号的发送功率；
数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号发送的码率。
另外，所述方法还可包括：基于累积检测窗或/和感知窗进行信号检测或/和能量感知；或者，基于特定检测窗或/和感知窗进行信号检测或/和能量感知。
可见，通过采用上述方案，就能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率，还可避免出现持续拥塞的问题。
实施例三
本发明实施例三提供了一种无线资源选择方法，如图10所示，包括：
步骤1001：在第一无线资源位置处设置感知窗，基于所述感知窗感知占用信号获取到感知结果；
步骤1002：当所述感知结果表征在感知窗内未感知到占用信号的能量时，选取第二无线资源作为目标资源；其中，所述第二无线资源在时域上可与所述第一无线资源相邻、在频域上可为随机选择或者指定频域；或者所述第一 无线资源与所述第二无线资源可分别在相邻的资源周期或感知周期内，并且在资源周期或感知周期内的偏移可相同；
步骤1003：基于选择的所述目标资源发送无线信号。
其中，所述感知窗可以为指定的一段时长。
通过采用本实施例提供的方案，在第一无线资源的感知窗中感知到有其他UE发送的占用信号的能量，则放弃占用第二无线资源；如果在第一无线资源的感知窗中没有感知到有其他UE发送的占用信号的能量，则确定占用第二无线资源作为第二无线资源，并在对应感知单元发送占用信号。
另外，可以理解的是上述方案可以为循环操作的步骤，即在第二无线资源时域上相邻的后一个无线资源，可以再次设置为第一无线资源，重复执行步骤1001-步骤1003。
例如，假设无线通信系统的资源周期是160ms，感知周期是320ms，UE在感知占用信号，如果在感知窗内感知到占用信号的能量，则可不选择无线资源，并可继续感知占用信号；如果在感知窗内没有感知到占用信号的能量，则可选择感知窗所在子帧的下一个子帧，或者选择下一个资源周期中与感知窗所在子帧的偏移相同的子帧，用于发送无线信号。这里子帧的偏移可以是指子帧在资源周期中相对资源周期起始的偏移。
可见，通过采用上述方案，就能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率，还可避免出现持续拥塞的问题。
实施例四
本实施例四提供了一种无线资源选择方法，所述方法包括：
UE选择目标资源，其中，所述目标资源用于发送无线信号；其中，所述UE选择目标资源，可包括以下至少之一：基于对无线信号的侦听结果，选择目标资源；基于占用信号的感知结果，选择所述目标资源；随机选择所述目标资源；
基于选择的所述目标资源发送无线信号。
可选地，上述基于选择的所述目标资源发送无线信号，可以包括：基于选择的所述目标资源进行竞争，当竞争成功时，在所述目标资源发送所述无线信号。
在发送无线信号之前，所述UE可基于所述目标资源侦听其他UE发送的其它无线信号，如果侦听到所述其它无线信号，则可不在所述无线资源发送信号，而重新选择资源；如果没有侦听到所述其它无线信号，则可在资源更新周期内固定使用所述无线资源发送无线信号。
其中，所述资源更新周期可包括以下之一：无线信号的发送周期；侦听周期；无线资源配置的周期。资源更新周期可以是一个或多个无线信号发送周期，或者是是一个或多个系统配置/预配置的资源周期，也可以小于资源周期。
例如，在车联网通信中，UE1可在发送V2X消息之前在资源池随机选择资源，并对选择的资源进行侦听，如果没有侦听到其它V2X消息，则可在资源更新周期之内占用选择的资源发送V2X消息；如果侦听到其它V2X消息，则可放弃发送V2X消息，并在下一个V2X发送周期重新随机选择资源，并进行侦听，直到所选资源为空闲，则发送V2X消息。
本实施例中，所述基于选择的所述目标资源进行竞争，当竞争成功时，在所述目标资源发送所述无线信号可包括以下至少之一：
直接选取所述目标资源；
在所述目标资源侦听所述其它无线信号得到侦听结果，当侦听结果表征所述目标资源为空闲时，确定在所述目标资源发送所述无线信号；当侦听结果表征所述目标资源有所述其它无线信号时，确定不在所述目标资源发送所述无线信号；
在所述目标资源感知所述其它无线信号或/和占用信号得到感知结果，当感知结果表征所述目标资源为空闲时，确定在所述无线资源发送所述无线信号；当感知结果表征所述目标资源有所述其它无线信号或/和占用信号时，确定在所述无线资源不发送所述无线信号。占用信号可以为用于标识对应的资源被占用的能量信号。
可选地，UE在系统可用资源中随机地选择无线资源，用于发送无线信号，在发送无线信号之前，所述UE可基于所述无线资源感知其他UE发送的无线信号或占用信号，感知窗在时域的长度可小于无线资源时域长度(比如1ms)，如果感知到所述无线资源没有信号能量，则可在资源更新周期内固定使用所述无线资源发送无线信号；如果感知到所述无线资源有信号能量，而相同时域的其它频率资源比如RB有空闲(没有信号能量)，则可不在所述无线资源发送信号，而在相同时域的其它频率资源重新选择资源发送信号；如果在所述无线资源以及相同时域的其它频率资源都感知到有信号能量，则所述UE可在下一个信号发送周期重新随机选择资源，并进行感知，直到所选资源为空闲，则发送无线信号。
或者，可选地，UE在每个信号发送周期都重新选择资源，方式为随机选择，UE在每个信号发送周期都使用选择的资源发送信号。信号发送周期可以小于资源周期，或者是一个或多个资源周期。
或者，可选地，UE在每个资源更新周期随机选择资源，在发送无线信号之前，先基于所选择的资源进行竞争，确定是否在所选择的资源发送信号。确定方法可包括：将所选资源划分为N个感知窗，UE生成一个0到N-1的随机数，并在索引号与随机数相对应的感知窗感知是否有其他UE发送的感知信号，在剩余的其它感知窗发送感知信号。如果感知到有感知信号，则可放弃占用所选择的资源，并停止发送感知信号，重新选择资源；如果感知为空闲，则可占用所选择的资源，在下一个资源周期发送无线信号。
例如，在车联网通信中，假设资源更新周期为3个资源周期，UE1和UE2随机地选择到相同的资源，并基于所选资源内划分的感知窗进行感知，来确认是否占用所选择的资源。感知的方法可与图6所示方法相同，假设UE1生成随机数3，UE2生成随机数1，则UE2可先感知到UE1发送的感知信号，并放弃占用所选资源，而UE1在索引号为3的感知窗感知的结果为空闲(此时UE2已经不发送感知信号了)，则可确定占用所选择的资源。上述确认可以是在资源更新周期的第一个资源周期进行，在第二、三个资源周期UE1可在所选择的资源发送V2X消息，而UE2可不在所选择的资 源发送消息。
可见，通过采用上述方案，就能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率，还可以避免出现持续拥塞的问题。
实施例五
在无线通信中，UE可在资源选择和/或确认是否在所选资源发送无线信号的阶段，根据侦听或感知的结果，对无线信号发送周期进行调整。
其中，所述调整可以包括：如果连续N次侦听或感知的结果都不是空闲，则增大无线信号的发送周期，即扩大连续两次发送无线信号的时间间隔；或者，如果连续M次侦听或感知的结果都为空闲，且当无线信号的发送周期并不是最小的周期时，则减小无线信号发送周期。其中，N和M都为配置/预配置的正整数，M和N可以不相等，比如M大于N。
例如，在车联网通信中，UE可在基于资源周期侦听V2X消息，然后选择发送V2X的资源，假设资源周期为40ms，UE可按照120ms的周期根据侦听结果重新选择资源，即资源更新周期为120ms，并在资源更新周期内发送3次V2X消息。假设N＝4，如果UE连续4个资源更新周期侦听到所有资源都已被占用，则UE可调整在120ms内消息的发送次数，比如调整为在120ms内发送2次或1次V2X消息。在120ms内发送1次消息的情况下，如果连续M＝5个资源更新周期都侦听到有空闲资源，则UE可调整为在每120ms内发送2次或3次V2X消息。
或者，UE可根据侦听或感知的结果，调整侦听或感知的周期。如果连续Q次侦听或感知的结果都是没有空闲资源可选择，或者存在资源冲突，则可增大UE侦听或感知的周期；或者，在不是最小侦听或感知周期的情况下，如果UE连续P次侦听或感知的结果都是有空闲资源，或者不存在冲突，则可适当减小侦听或感知的周期。其中P和Q可为配置/与配置的正整数。
例如，V2X UE每80ms进行一次感知以及选择资源，如果感知到空 闲则可在判断为空闲的资源中选择资源发送V2X消息；如果感知没有空闲资源，则可重新进行感知，直到选择到资源用于发送V2X消息。如果连续3次感知到没有空闲资源，则可增大感知的周期，比如将感知的周期调整为每120ms，或者每160ms感知一次。
或者，可根据侦听或感知的结果，与预先设定/或配置的阈值进行比较，如果被占用的资源超过阈值，则可对无线资源的选择或无线信号的发送进行调整，可包括：
延迟对无线资源的选择，或者延迟对无线信号的发送，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
或者，扩大选择无线资源的周期，或者扩大无线信号的发送周期；
或者，降低无线信号发送的功率；
或者，无线信号发送的码率。
例如，在车联网通信中，V2X UE可通过侦听其他UE发送的V2X消息来选择用于发送V2X消息的资源，以及通过侦听结果更新选择的资源。假设侦听周期为320ms，V2X消息的发送周期为80ms，占用资源的阈值设定为70％。当侦听结果为占用资源已经超过了资源池的70％，则该UE可选择延迟发送V2X消息，延迟时间可为一个资源周期。或者，从原来的每个资源周期发送一次V2X消息改为每2个资源周期发送一次V2X消息。或者，可降低V2X消息的发送功率进行发送。或者，可降低V2X消息的码率进行发送。
或者，UE可基于无线信号检测或者基于占用信号能量感知选择所述无线资源，以及采用不同的方式获得检测或感知结果，可包括：
根据信号检测或/和能量感知基于累积检测窗或/和感知窗；
或者，基于特定检测窗或/和感知窗。
例如，在车联网通信中，V2X UE可通过对占用信号能量的感知结果来选择资源，用于发送V2X消息。基于连续两个感知窗来确定感知结果，比如满足在两个感知窗中感知结果都为空闲资源的条件时，才可认为感知结果为空闲资源，并可在空闲资源中选择资源用于发送V2X消息。同理， 也可以基于单个或多个(多于两个)感知窗的感知结果，来确定感知结果，并选择发送V2X消息的资源。
可见，通过采用上述方案，就能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率，还可避免出现持续拥塞的问题。
实施例六
本发明实施例六提供了一种终端设备，如图11所示，包括：
选择单元1101，设置为：选择目标资源，其中，所述目标资源用于发送无线信号；
发送单元1102，设置为：基于选择的所述目标资源发送无线信号；
其中，所述选择单元1101是设置为：采用以下方式至少之一选择目标资源：
基于对无线信号的侦听结果，选择目标资源；
基于占用信号的感知结果，选择所述目标资源；
随机选择所述目标资源。
可选地，所述选择单元1101是设置为：对资源池中的资源进行侦听，获取到侦听结果，所述侦听结果中至少包括：占用资源和/或空闲资源；基于所述侦听结果，从空闲资源中选择资源目标资源。
本实施例中所述侦听可以是指在无线资源进行信号检测，判断无线资源中是否有其他设备发送无线信号。
可选地，所述选择单元1101是设置为：基于侦听周期，对资源池中的资源进行侦听，获取到侦听结果；
相应的，所述选择单元是设置为：对侦听周期进行调整，包括以下至少之一：
根据所述UE移动速度调整侦听周期；
根据侦听结果调整侦听周期；
根据所述发送无线信号承载数据的业务类型和开销大小调整侦听周期。
可选地，所述选择单元1101是设置为：基于感知集合感知其他UE发送的占用信号，得到感知结果；基于所述感知结果，获取到未感知到占用信号的能量的空闲感知单元，将所述空闲感知单元对应的资源作为空闲资源；从所述空闲资源中选择目标资源；
其中，所述感知集合中每个感知单元与用于发送无线信号的资源集合中的一个或多个资源单元可为一一对应的映射关系。
可选地，所述选择单元1101是设置为：根据感知周期，基于感知集合感知除所述UE外的其他UE发送的占用信号；相应地，对所述感知周期进行调整，包括以下至少之一：
根据所述UE移动速度的变化调整感知周期；
根据感知结果调整感知周期；
根据所述发送无线信号承载数据的业务类型和开销大小调整感知周期。
可选地，所述选择单元1101是设置为：在第一无线资源位置处设置感知窗，基于所述感知窗感知占用信号获取到感知结果；当所述感知结果表征在感知窗内未感知到占用信号的能量时，选取第二无线资源作为目标资源，其中，所述第二无线资源在时域上与所述第一无线资源相邻、在频域上为随机选择或者指定频域。
可选地，所述选择单元1101还设置为：判断占用资源是否超过阈值，并确定以下至少之一：
数据传输时间窗，包括：当被占用的资源超过阈值时，延迟选择所述无线资源，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
数据传输周期，包括：当被占用的资源超过阈值时，扩大选择所述无线资源的周期；
数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号的发送功率；
数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号发送的码率。
可选地，所述选择单元1101还设置为：
基于累积检测窗或/和感知窗进行信号检测或/和能量感知；
或者，
基于特定检测窗或/和感知窗进行信号检测或/和能量感知。
可选地，所述选择单元1101是设置为：基于资源更新周期，在系统可用资源集合内随机选择资源；
其中，所述资源更新周期包括以下之一：无线信号发送的周期；侦听或感知周期；无线资源配置的周期。
可选地，所述选择单元1101是设置为：基于选择的所述目标资源进行竞争，当竞争成功时，在所述目标资源发送所述无线信号。
可选地，所述选择单元1101是设置为：执行以下处理中的至少之一：
直接选取所述目标资源；
在所述目标资源侦听所述其它无线信号得到侦听结果，当侦听结果表征所述目标资源为空闲时，确定在所述目标资源发送所述无线信号；当侦听结果表征所述目标资源为占用资源(如有所述其它无线信号)时，确定不在所述目标资源发送所述无线信号；
在所述目标资源感知所述其它无线信号或/和占用信号得到感知结果，当感知结果表征所述目标资源为空闲时，确定在所述无线资源发送所述无线信号；当感知结果表征所述目标资源有所述其它无线信号或/和占用信号时，确定在所述无线资源不发送所述无线信号。
可选地，所述选择单元1101还设置为：根据连续N次感知所述无线资源是否为空闲，调整所述无线信号的发送周期和/或感知周期；其中，N为大于等于2的正整数。
可选地，所述选择单元1101是设置为：当连续N次侦听结果均表征所述目标资源中包括有其它无线信号或/和占用信号时，增大发送周期和/或感知周期。当连续N次侦听结果均表征所述目标资源对应的无线资源为空闲时，减小发送周期和/或感知周期。
可选地，所述选择单元1101还设置为：确定在所述目标资源处发送所述无线信号的第一时间长度；
其中，所述第一时间长度包括：无线信号发送的周期；或者，侦听或感知的周期；或者，无线资源配置的周期。
可选地，所述选择单元还设置为：判断占用资源是否超过阈值，并确定以下至少之一：
数据传输时间窗，包括：当被占用的资源超过阈值时，延迟所述无线信号的发送，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
数据传输周期，包括：当被占用的资源超过阈值时，扩大所述无线信号发送的周期；
数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线信号的发送功率；
数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线信号发送的码率。
可选地，所述选择单元是设置为：基于累积检测窗或/和感知窗进行信号检测或/和能量感知；或者，基于特定检测窗或/和感知窗进行信号检测或/和能量感知。
可见，通过采用上述方案，就能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率，还可避免出现持续拥塞的问题。
实施例七
本发明实施例七提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述无线资源选择方法。
在本申请所提供的实施例中，可以理解到，所揭露的设备和方法，可以通过其它的方式实现。以上所描述的设备实施例可以仅仅是示意性的，例如，所述模块的划分，可以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，如：多个模块或组件可以结合，或可以集成到另一个 系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的不同组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或模块的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的模块可以是、或也可以不是物理上分开的，作为模块显示的部件可以是、或也可以不是物理模块，即可以位于一个地方，也可以分布到多个网络模块上；可以根据实际的需要选择其中的部分或全部模块来实现本实施例方案的目的。
另外，在本发明实施例中的功能模块可以全部集成在一个处理模块中，也可以是不同模块分别单独作为一个模块，也可以两个或两个以上模块集成在一个模块中；上述集成的模块既可以采用硬件的形式实现，也可以采用硬件加软件功能模块的形式实现。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件、处理器等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。
上述实施例中的装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的装置/功能模块/功能单元以软件功能模块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。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
本领域的普通技术人员可以理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的精神和范围。本申请的保护范围以权利要求所定义的范围为准。
工业实用性
本发明实施例所提供的无线资源选择方法及终端设备，能够基于侦听结果、或者感知结果、或者随机地选取目标资源，进而在选择的目标资源上发送无线信号。如此，就能够降低无线信号选择发送资源出现冲突的概率，并且保证通信的可靠性。还可以避免出现持续拥塞的问题。

Claims (43)

  1. 一种无线资源选择方法，所述方法包括：
    用户设备UE选择目标资源，其中，所述目标资源用于发送无线信号；
    基于选择的所述目标资源发送无线信号；
    其中，所述UE选择目标资源，包括以下至少之一：
    基于对无线信号的侦听结果，选择所述目标资源；
    基于对占用信号的感知结果，选择所述目标资源；
    随机选择所述目标资源。
  2. 根据权利要求1所述的方法，其中，所述基于对无线信号的侦听结果，选择所述目标资源，包括：
    对资源池中的资源进行侦听，获取到侦听结果，所述侦听结果中包括：占用资源和/或空闲资源；
    基于所述侦听结果，从空闲资源中选择所述目标资源。
  3. 根据权利要求2所述的方法，其中，
    所述对资源池中的资源进行侦听，获取到侦听结果，包括：基于侦听周期，对资源池中的资源进行侦听，获取到侦听结果；
    所述方法还包括：对侦听周期进行调整，包括以下至少之一：
    根据所述UE移动速度调整侦听周期；
    根据侦听结果调整侦听周期；
    根据所述发送无线信号承载数据的业务类型和开销大小调整侦听周期。
  4. 根据权利要求3所述的方法，其中，所述根据侦听结果调整侦听周期，包括：根据连续N次侦听所述无线资源是否为空闲，调整所述无线信号的侦听周期；其中，N为大于等于2的正整数。
  5. 根据权利要求4所述的方法，其中，根据连续N次侦听结果，调整所述无线信号的侦听周期包括：
    当连续N次侦听结果均表征所述目标资源中包括有其它无线信号或/和占用信号时，增大侦听周期。
  6. 根据权利要求4所述的方法，其中，所述根据连续N次侦听结果，调整所述无线信号的侦听周期，包括：
    当连续N次侦听结果均表征所述目标资源对应的无线资源为空闲时，减小侦听周期。
  7. 根据权利要求1所述的方法，其中，所述基于对占用信号的感知结果，选择所述目标资源，包括：
    基于感知集合感知其他UE发送的占用信号的能量，得到感知结果；
    基于所述感知结果，获取到未感知到占用信号的能量的空闲感知单元，将所述空闲感知单元对应的资源作为空闲资源；
    从所述空闲资源中选择目标资源。
  8. 根据权利要求7所述的方法，其中，所述感知集合中每个感知单元与用于发送无线信号的信号发送集合中的一个或多个资源单元为一一对应的映射关系。
  9. 根据权利要求7所述的方法，其中，
    所述基于感知集合感知其他UE发送的占用信号，包括：根据感知周期，基于感知集合感知除所述UE外的其他UE发送的占用信号；
    所述方法还包括：对所述感知周期进行调整，包括以下至少之一：
    根据所述UE移动速度的变化调整感知周期；
    根据感知结果调整感知周期；
    根据所述发送无线信号承载数据的业务类型和开销大小调整感知周期。
  10. 根据权利要求9所述的方法，其中，所述根据感知结果调整感知周期，包括：根据连续N次感知所述无线资源是否为空闲，调整所述无线信号的感知周期；其中，N为大于等于2的正整数。
  11. 根据权利要求10所述的方法，其中，根据连续N次感知结果，调整所述无线信号的感知周期包括：
    当连续N次感知结果均表征所述目标资源中包括有其它无线信号或/和占用信号时，增大感知周期。
  12. 根据权利要求10所述的方法，其中，所述根据连续N次感知结果，调整所述无线信号的感知周期，包括：
    当连续N次感知结果均表征所述目标资源对应的无线资源为空闲时，减小感知周期。
  13. 根据权利要求1所述的方法，其中，所述基于占用信号的感知结果， 选择所述目标资源，包括：
    在第一无线资源位置处设置感知窗，基于所述感知窗感知占用信号获取到感知结果；
    当所述感知结果表征在感知窗内未感知到占用信号的能量时，选取第二无线资源作为目标资源，其中，所述第二无线资源在时域上与所述第一无线资源相邻、在频域上为随机选择或者指定频域。
  14. 根据权利要求2所述的方法，所述方法还包括：
    判断占用资源是否超过阈值，并确定以下至少之一：
    数据传输时间窗，包括：当被占用的资源超过阈值时，延迟选择所述无线资源，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
    数据传输周期，包括：当被占用的资源超过阈值时，扩大选择所述无线资源的周期；
    数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号的发送功率；
    数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号发送的码率。
  15. 根据权利要求2或7所述的方法，所述方法还包括：
    基于累积检测窗或/和感知窗进行信号检测或/和能量感知；
    或者，
    基于特定检测窗或/和感知窗进行信号检测或/和能量感知。
  16. 根据权利要求1所述的方法，其中，所述随机选择无线资源，包括：
    基于资源更新周期，在系统可用资源集合内随机选择资源；
    其中，所述资源更新周期包括以下之一：无线信号的发送周期；侦听或感知周期；无线资源配置的周期。
  17. 根据权利要求1或16所述的方法，其中，所述基于选择的所述目标资源发送无线信号，包括：
    基于选择的所述目标资源进行竞争，当竞争成功时，在所述目标资源发送所述无线信号。
  18. 根据权利要求17所述的方法，其中，所述基于选择的所述目标资源进行竞争，当竞争成功时，在所述目标资源发送所述无线信号包括以下至少 之一：
    直接选取所述目标资源；
    在所述目标资源侦听所述其它无线信号得到侦听结果，当侦听结果表征所述目标资源为空闲资源时，确定在所述目标资源发送所述无线信号；当侦听结果表征所述目标资源为占用资源时，确定不在所述目标资源发送所述无线信号；
    在所述目标资源感知所述其它无线信号或/和占用信号的能量得到感知结果，当感知结果表征所述目标资源为空闲时，确定在所述无线资源发送所述无线信号；当感知结果表征所述目标资源有所述其它无线信号或/和占用信号时，确定在所述无线资源不发送所述无线信号。
  19. 根据权利要求18所述的方法，所述方法还包括：根据连续N次侦听或感知所述无线资源是否为空闲，调整所述无线信号的发送周期和/或侦听或感知周期；其中，N为大于等于2的正整数。
  20. 根据权利要求19所述的方法，其中，根据连续N次侦听或感知结果，调整所述无线信号的发送周期和/或侦听或感知周期包括：
    当连续N次侦听或感知结果均表征所述目标资源中包括有其它无线信号或/和占用信号时，增大发送周期和/或侦听或感知周期。
  21. 根据权利要求19所述的方法，其中，所述根据连续N次侦听或感知结果，调整所述无线信号的发送周期和/或侦听或感知周期，包括：
    当连续N次侦听或感知结果均表征所述目标资源对应的无线资源为空闲时，减小发送周期和/或侦听或感知周期。
  22. 根据权利要求17所述的方法，对应于所述基于选择的所述目标资源发送无线信号，所述方法还包括：
    确定在所述目标资源处发送所述无线信号的第一时间长度；
    其中，所述第一时间长度包括：无线信号发送的周期；或者，侦听或感知的周期；或者，无线资源配置的周期。
  23. 根据权利要求18所述的方法，所述方法还包括：
    判断占用资源是否超过阈值，并确定以下至少之一：
    数据传输时间窗，包括：当被占用的资源超过阈值时，延迟所述无线信号的发送，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
    数据传输周期，包括：当被占用的资源超过阈值时，扩大所述无线信号发送的周期；
    数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线信号的发送功率；
    数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线信号发送的码率。
  24. 根据权利要求18所述的方法，其中，得到所述侦听结果或感知结果的方法包括：
    基于累积检测窗或/和感知窗进行信号检测或/和能量感知；
    或者，
    基于特定检测窗或/和感知窗进行信号检测或/和能量感知。
  25. 一种终端设备，所述终端设备包括：
    选择单元，设置为：选择目标资源，其中，所述目标资源用于发送无线信号；
    发送单元，设置为：基于选择的所述目标资源发送无线信号；
    其中，所述选择单元是设置为：采用以下方式至少之一选择目标资源：
    基于对无线信号的侦听结果，选择所述目标资源；
    基于占用信号的感知结果，选择所述目标资源；
    随机选择所述目标资源。
  26. 根据权利要求25所述的终端设备，其中，所述选择单元是设置为：对资源池中的资源进行侦听，获取到侦听结果，所述侦听结果中包括：占用资源和/或空闲资源；基于所述侦听结果，从空闲资源中选择目标资源。
  27. 根据权利要求26所述的终端设备，其中，所述选择单元是设置为：基于侦听周期，对资源池中的资源进行侦听，获取到侦听结果；
    所述选择单元是设置为：对侦听周期进行调整，包括以下至少之一：
    根据所述UE移动速度调整侦听周期；
    根据侦听结果调整侦听周期；
    根据所述发送无线信号承载数据的业务类型和开销大小调整侦听周期。
  28. 根据权利要求27所述的终端设备，其中，所述选择单元是设置为：根据连续N次侦听所述无线资源是否为空闲，调整所述无线信号的侦听周期； 其中，N为大于等于2的正整数。
  29. 根据权利要求25所述的终端设备，其中，所述选择单元是设置为：基于感知集合感知其他UE发送的占用信号的能量，得到感知结果；基于所述感知结果，获取到未感知到占用信号的能量的空闲感知单元，将所述空闲感知单元对应的资源作为空闲资源；从所述空闲资源中选择目标资源；
    其中，所述感知集合中每个感知单元与用于发送无线信号的资源集合中的一个或多个资源单元为一一对应的映射关系。
  30. 根据权利要求29所述的终端设备，其中，
    所述选择单元是设置为：根据感知周期，基于感知集合感知除所述UE外的其他UE发送的占用信号；
    所述选择单元还设置为：对所述感知周期进行调整，包括以下至少之一：
    根据所述UE移动速度的变化调整感知周期；
    根据感知结果调整感知周期；
    根据所述发送无线信号承载数据的业务类型和开销大小调整感知周期。
  31. 根据权利要求29所述的终端设备，其中，所述选择单元是设置为：在第一无线资源位置处设置感知窗，基于所述感知窗感知占用信号获取到感知结果；当所述感知结果表征在感知窗内未感知到占用信号的能量时，选取第二无线资源作为目标资源，其中，所述第二无线资源在时域上与所述第一无线资源相邻、在频域上为随机选择或者指定频域。
  32. 根据权利要求31所述的终端设备，其中，所述选择单元是设置为：根据连续N次感知所述无线资源是否为空闲，调整所述无线信号的感知周期；其中，N为大于等于2的正整数。
  33. 根据权利要求26所述的终端设备，所述选择单元还设置为：判断占用资源是否超过阈值，并确定以下至少之一：
    数据传输时间窗，包括：当被占用的资源超过阈值时，延迟选择所述无线资源，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
    数据传输周期，包括：当被占用的资源超过阈值时，扩大选择所述无线资源的周期；
    数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号的发送功率；
    数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线资源上信号发送的码率。
  34. 根据权利要求26或29所述的终端设备，所述选择单元还设置为：
    基于累积检测窗或/和感知窗进行信号检测或/和能量感知；
    或者，
    基于特定检测窗或/和感知窗进行信号检测或/和能量感知。
  35. 根据权利要求25所述的终端设备，其中，所述选择单元是设置为：基于资源更新周期，在系统可用资源集合内随机选择资源；
    其中，所述资源更新周期包括以下之一：无线信号发送的周期；侦听或感知周期；无线资源配置的周期。
  36. 根据权利要求25所述的终端设备，其中，所述选择单元是设置为：基于选择的所述目标资源进行竞争，当竞争成功时，在所述目标资源发送所述无线信号。
  37. 根据权利要求36所述的终端设备，其中，所述选择单元是设置为：执行以下处理中的至少之一：
    直接选取所述目标资源；
    在所述目标资源侦听所述其它无线信号得到侦听结果，当侦听结果表征所述目标资源为空闲资源时，确定在所述目标资源发送所述无线信号；当侦听结果表征所述目标资源为占用资源时，确定不在所述目标资源发送所述无线信号；
    在所述目标资源感知所述其它无线信号或/和占用信号的能量得到感知结果，当感知结果表征所述目标资源为空闲时，确定在所述无线资源发送所述无线信号；当感知结果表征所述目标资源有所述其它无线信号或/和占用信号时，确定在所述无线资源不发送所述无线信号。
  38. 根据权利要求37所述的终端设备，所述选择单元还设置为：根据连续N次侦听或感知所述无线资源是否为空闲，调整所述无线信号的发送周期和/或侦听或感知周期；其中，N为大于等于2的正整数。
  39. 根据权利要求37所述的终端设备，其中，所述选择单元是设置为：当连续N次侦听或感知结果均表征所述目标资源中包括有其它无线信号或/和占用信号时，增大发送周期和/或侦听或感知周期。
  40. 根据权利要求37所述的终端设备，其中，所述选择单元是设置为：当连续N次侦听或感知结果均表征所述目标资源对应的无线资源为空闲时，减小发送周期和/或侦听或感知周期。
  41. 根据权利要求36所述的终端设备，所述选择单元还设置为：确定在所述目标资源处发送所述无线信号的第一时间长度；
    其中，所述第一时间长度包括：无线信号发送的周期；或者，侦听或感知的周期；或者，无线资源配置的周期。
  42. 根据权利要求37所述的终端设备，所述选择单元还设置为：判断占用资源是否超过阈值，并确定以下至少之一：
    数据传输时间窗，包括：当被占用的资源超过阈值时，延迟所述无线信号的发送，延迟的时间值为设定范围内的随机值，或者预定义的固定值；
    数据传输周期，包括：当被占用的资源超过阈值时，扩大所述无线信号发送的周期；
    数据传输功率，包括：当被占用的资源超过阈值时，降低所述无线信号的发送功率；
    数据传输码率，包括：当被占用的资源超过阈值时，降低所述无线信号发送的码率。
  43. 根据权利要求37所述的终端设备，其中，所述选择单元是设置为：基于累积检测窗或/和感知窗进行信号检测或/和能量感知；或者，基于特定检测窗或/和感知窗进行信号检测或/和能量感知。
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