WO2020186489A1 - 信道检测机制的确定方法、装置、设备及存储介质 - Google Patents

信道检测机制的确定方法、装置、设备及存储介质 Download PDF

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Publication number
WO2020186489A1
WO2020186489A1 PCT/CN2019/078926 CN2019078926W WO2020186489A1 WO 2020186489 A1 WO2020186489 A1 WO 2020186489A1 CN 2019078926 W CN2019078926 W CN 2019078926W WO 2020186489 A1 WO2020186489 A1 WO 2020186489A1
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Prior art keywords
subband
channel
contention window
detection mechanism
detection mode
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PCT/CN2019/078926
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English (en)
French (fr)
Inventor
朱亚军
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北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to KR1020217033730A priority Critical patent/KR102542376B1/ko
Priority to PCT/CN2019/078926 priority patent/WO2020186489A1/zh
Priority to JP2021556305A priority patent/JP7289366B2/ja
Priority to SG11202110293PA priority patent/SG11202110293PA/en
Priority to BR112021018422A priority patent/BR112021018422A2/pt
Priority to CN201980000334.XA priority patent/CN110100400B/zh
Priority to EP19920441.3A priority patent/EP3944526A4/en
Publication of WO2020186489A1 publication Critical patent/WO2020186489A1/zh
Priority to US17/476,762 priority patent/US11882078B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • 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
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover

Definitions

  • the present disclosure relates to the field of communications, and in particular to a method, device, equipment and storage medium for determining a channel detection mechanism.
  • LAA License Assisted Access
  • a channel detection mechanism is introduced in LAA. That is, the base station needs to detect whether the channel is in an idle state before sending data, and data can be sent only when the channel is in an idle state.
  • the channel detection mechanism has many forms, if the frequency spectrum used by the communication system is a broadband part, and the broadband part includes multiple subband parts, there is no solution for how to select a reasonable channel detection mechanism.
  • the embodiments of the present disclosure provide a method, device, equipment, and storage medium for determining a channel detection mechanism, which can be used to solve the problem of how to select a reasonable channel detection mechanism when a broadband part (including multiple subband parts) is used for transmission. .
  • the technical solution is as follows:
  • a method for determining a channel detection mechanism is provided, which is applied to a scenario where a broadband spectrum on an unlicensed spectrum is used for transmission, the broadband spectrum includes multiple subbands, and the method includes:
  • the detection mode is a wideband detection mode
  • the channel detection mechanism corresponding to each subband is determined according to each subband of the multiple subbands.
  • the channel detection mechanism includes a competition window size, and different competition window sizes correspond to different channel access priorities
  • the determining a channel detection mechanism corresponding to the wideband spectrum according to at least one subband of the multiple subbands includes:
  • the contention window size with the lowest channel access priority is determined as the contention window size in the channel detection mechanism corresponding to the broadband spectrum.
  • the channel detection mechanism includes a contention window size
  • the separately determining the channel detection mechanism corresponding to each subband according to each subband of the multiple subbands includes:
  • the channel detection mechanism corresponding to each subband is determined respectively.
  • each subband corresponds to a first contention window size and a second contention window size
  • the first contention window size is a contention window size used in the broadband detection mode
  • the second contention window size is the contention window size used in the subband detection mode.
  • the determining the detection mode on the broadband frequency spectrum includes:
  • BWP Band Width Part
  • the method further includes:
  • a device for determining a channel detection mechanism which is applied to a scenario where a broadband spectrum on an unlicensed spectrum is used for transmission, the broadband spectrum includes multiple subbands, and the device includes:
  • a mode determination module configured to determine a detection mode on the broadband frequency spectrum
  • a mechanism determining module configured to determine a channel detection mechanism corresponding to the wideband spectrum according to at least one subband of the plurality of subbands when the detection mode is a wideband detection mode;
  • the mechanism determining module is configured to determine the channel detection mechanism corresponding to each subband according to each subband of the multiple subbands when the detection mode is a subband detection mode.
  • the channel detection mechanism includes a contention window size, and different contention window sizes correspond to different channel access priorities
  • the mode determining module is configured to determine the size of the contention window with the lowest channel access priority among the contention window sizes corresponding to the multiple subbands; and determine the size of the contention window with the lowest channel access priority Is the size of the contention window in the channel detection mechanism corresponding to the wideband spectrum.
  • the channel detection mechanism includes a contention window size
  • the mechanism determining module is configured to determine the channel detection mechanism corresponding to each subband according to the size of the contention window corresponding to each subband.
  • each subband corresponds to a first contention window size and a second contention window size
  • the first contention window size is a contention window size used in the broadband detection mode
  • the second contention window size is the contention window size used in the subband detection mode.
  • the device further includes: a receiving module
  • the mechanism determining module is configured to determine the detection mode on the broadband frequency spectrum by itself;
  • the receiving module is configured to receive a first BWP switching command; the mechanism determining module is configured to determine a detection mode on the broadband spectrum according to the first BWP switching command.
  • the device further includes: a sending module
  • the mechanism determining module is configured to generate a second bandwidth part BWP switching command, where the second BWP switching command is used to indicate a channel detection mechanism on the wideband spectrum;
  • the sending module is configured to send the second BWP switching command to the terminal.
  • a wireless communication device including:
  • a transceiver connected to the processor
  • a memory for storing processor executable instructions
  • the processor is configured to load and execute the executable instructions to implement the method for determining the channel detection mechanism described in the above aspect.
  • a computer-readable storage medium stores at least one instruction, at least one program, code set or instruction set, the at least one instruction, the At least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for determining the channel detection mechanism as described above.
  • the channel detection mechanism corresponding to the broadband spectrum is determined according to at least one of the multiple subbands.
  • the detection mode is the subband detection mode, according to the multiple subbands
  • Each subband in the band separately determines the channel detection mechanism corresponding to each subband, and can adopt different determination methods based on different detection modes to determine a more reasonable channel detection mechanism, so as to realize the unlicensed spectrum with other wireless communication systems Fairly occupy channel resources.
  • Fig. 1 is a schematic diagram of channel sensing of LBT Cat.2 involved in the present disclosure
  • Fig. 2 is a schematic diagram of channel sensing of LBT Cat.4 involved in the present disclosure
  • Fig. 3 is a block diagram of a wireless communication system provided by an exemplary embodiment of the present disclosure.
  • Fig. 4 is a flowchart of a method for determining a channel detection mechanism provided by an exemplary embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of the relationship between a broadband frequency spectrum and subbands provided by an exemplary embodiment of the present disclosure
  • FIG. 6 is a flowchart of a method for determining a channel detection mechanism according to another exemplary embodiment of the present disclosure
  • FIG. 7 is an exemplary diagram of a schematic example of a method for determining a channel detection mechanism provided in the embodiment of FIG. 6;
  • FIG. 8 is a flowchart of a method for determining a channel detection mechanism according to another exemplary embodiment of the present disclosure.
  • FIG. 9 is a flowchart of a method for determining a channel detection mechanism according to another exemplary embodiment of the present disclosure.
  • FIG. 10 is an exemplary diagram of a schematic example of a method for determining a channel detection mechanism provided in the embodiment of FIG. 9;
  • FIG. 11 is a schematic structural diagram of an apparatus for determining a channel detection mechanism provided by an exemplary embodiment of the present disclosure
  • Fig. 12 is a schematic structural diagram of a wireless communication device provided by another exemplary embodiment of the present disclosure.
  • the LAA In order to ensure coexistence with other wireless systems on the unlicensed spectrum, such as the coexistence of wireless fidelity systems (WiFi), the LAA also introduces a mechanism that requires channel detection before data transmission.
  • WiFi wireless fidelity systems
  • Channel detection mechanisms usually include the following five types:
  • the first type (Cat.1): Does not contain LBT (Listen before talk), that is, wireless communication devices do not need to perform channel detection before transmitting information, and directly send information.
  • LBT can also be called a monitoring avoidance mechanism, which is used to realize the effective sharing of unlicensed spectrum. LBT requires that the channel be monitored before information is transmitted, and CCA (Clear Channel Assessment, clear channel assessment) is performed, and transmission is performed when the channel is guaranteed to be free.
  • the second type LBT Cat.2: LBT mechanism without random backoff process.
  • the wireless communication device Before the wireless communication device transmits information, it only needs to detect a time granularity. For example, the time granularity can be 25us. If the channel is idle in this time granularity, the wireless communication device can transmit information; otherwise, the LBT execution fails and the wireless communication The device cannot transmit information.
  • the wireless communication device performs a single-slot CCA listening. If the channel listening results in the first CCA slot and the third CCA slot are idle, the wireless communication device The channel can be occupied for data transmission; if the listening result of the channel in the second CCA time slot is busy, the wireless communication device cannot occupy the channel for data transmission, referred to as no data transmission.
  • the third type (LBT Cat.3): CWS (Contention Window Size, contention window size) fixed random backoff LBT mechanism, the sending device first checks whether the channel is idle at the first granularity, and if it detects that the channel is idle, The random number value N is selected in the first competition window, and the channel detection is performed with the second time granularity as the time granularity; if the channel is detected to be idle at the second time granularity and the value of the random number is not 0, the random number Decrease the value of 1 and continue channel detection with the second time granularity as the time granularity; if the channel is detected to be busy at the second time granularity, the channel detection will be performed again with the first time granularity as the time granularity; When the time granularity detects that the channel is idle and the value of the random number is not 0, the value of the random number is reduced by 1, and the second time granularity is used as the time granularity for channel detection; until the value of the random number
  • the fourth type (LBT Cat.4): CWS variable random back-off LBT mechanism. That is, on the basis of LBT Cat.3, the sending device can adjust the CWS according to the result of the previous transmission. For example, in the data transmitted within a reference time during the previous transmission, the proportion of data that was not received correctly is X. When X is greater than a threshold, the CWS value increases.
  • four priority levels are set in LBT Cat.4, each priority level corresponds to a different parameter configuration, and data transmission of different service types corresponds to different priority levels.
  • LBT Cat.4 The principle of LBT Cat.4 is as follows: the wireless communication device firstly detects whether the channel is idle at the first time granularity. If it detects that the channel is idle, it selects the value of the backoff counter (also called random number) N in the first contention window, And use the second time granularity as the time granularity for channel detection; if it is detected that the channel is idle at the second time granularity and the value of the back-off counter is not 0, the value of the back-off counter is decreased by 1, and the second time granularity is continued.
  • the wireless communication device firstly detects whether the channel is idle at the first time granularity. If it detects that the channel is idle, it selects the value of the backoff counter (also called random number) N in the first contention window, And use the second time granularity as the time granularity for channel detection; if it is detected that the channel is idle at the second time granularity and the value of the back-off counter is not 0, the value
  • the time granularity is the time granularity for channel detection; if the channel is detected to be busy at the second time granularity, the channel detection is performed again with the first time granularity as the time granularity; if the channel is detected to be idle again at the first time granularity, and the channel is detected again If the value of the backoff counter is not 0, the value of the backoff counter is decreased by 1, and the channel detection is resumed with the second time granularity as the time granularity; until the value of the backoff counter is decreased to 0, it means that the channel can be occupied.
  • the wireless communication device uniformly randomly generates a backoff counter N between 0 and Contention Windows Size (CWS), and listens with CCA slot as the granularity.
  • CWS Contention Windows Size
  • the channel listening results are idle , N is reduced to 5; in the third to sixth listening time slots, the channel listening result is busy, N remains unchanged, and the detection is restarted after a delay of 4 listening time slots.
  • the channel monitoring result is an idle state, and N decreases to 0, and the wireless communication device starts to occupy the channel for data transmission.
  • the wireless communication device During the data transmission process, if the wireless communication device receives a negative feedback (NACK) in the CWS adjustment reference subframe, it means that the data transmission has failed.
  • NACK negative feedback
  • Table-1 shows four priority parameter configurations for downlink LBT Cat.4, and Table-2 shows four priority parameter configurations for uplink LBT Cat.4. The two are only slightly different in their configured values.
  • m p is the number of ECCA (Extended Clear Channel) included in a delay time. Each delay time is composed of a fixed 16us duration and m p ECCAs, which is the first time introduced above granularity.
  • CW min,p and CW max,p are the minimum competition window value and the maximum competition window value.
  • the randomly generated back-off counter N determines the length of back-off time in the LBT channel detection process, and T mcot,p is the maximum length of time that the channel can be occupied after the LBT Cat.4 corresponding to each priority is successfully executed.
  • the comparison can be seen from the above table. In terms of priority 1, 2, the execution time of the LBT process of priority 3, 4 is longer, and the chance of obtaining channel access is relatively low. In order to ensure fairness, data transmission using these two priorities can occupy The maximum transmission time is also relatively long.
  • the fifth type channel detection mechanism based on frame structure, namely FBE (Frame Based Equipment).
  • FBE Fulle Based Equipment
  • the fixed period refers to the time domain unit scheduled by FBE, for example, the fixed period may be FFP (Fixed Frame Period, fixed frame period). The length of the fixed period can be predetermined by the agreement.
  • Fig. 3 is a schematic diagram showing a wireless communication system according to an exemplary embodiment.
  • the wireless communication system may include: a base station 310 and a terminal 320.
  • the base station 310 is deployed in the access network.
  • the access network in the 5G NR system can be called NG-RAN (New Generation-Radio Access Network).
  • the base station 310 and the terminal 320 communicate with each other through a certain air interface technology, for example, may communicate with each other through cellular technology.
  • the base station 310 is a device deployed in an access network to provide the terminal 320 with a wireless communication function.
  • the base station 310 may include various forms of macro base stations, micro base stations, relay stations, access points, and so on.
  • the names of devices with base station functions may be different. For example, in a 5G NR system, they are called gNodeB or gNB. As communication technology evolves, the name "base station" may change.
  • the above-mentioned devices that provide wireless communication functions for the terminal 320 are collectively referred to as base stations.
  • the base station 310 may also become an access network device.
  • the number of terminals 320 is usually multiple, and one or more terminals 320 may be distributed in a cell managed by each base station 310.
  • the terminal 320 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of User Equipment (UE), mobile stations ( Mobile Station, MS), terminal device (terminal device), etc.
  • UE User Equipment
  • MS Mobile Station
  • terminal device terminal device
  • the "5G NR system" in the embodiments of the present disclosure may also be referred to as a 5G system or an NR system, but those skilled in the art can understand its meaning.
  • the technical solutions described in the embodiments of the present disclosure may be applicable to the 5G NR system, and may also be applicable to the subsequent evolution system of the 5G NR system.
  • This 5G NR system can be used in LAA scenarios.
  • Fig. 4 shows a flowchart of a method for determining a channel detection mechanism provided by an exemplary embodiment of the present disclosure.
  • the method may be executed by the base station 310 or the terminal 320 shown in FIG. 3.
  • the method may be applied to a scenario where a broadband spectrum on an unlicensed spectrum is used for transmission.
  • the method includes:
  • Step 402 Determine a detection mode on the broadband frequency spectrum
  • Broadband spectrum is spectrum on unlicensed spectrum. Since in the traditional LAA system, the maximum bandwidth of a carrier is 20MHz, and in the subsequent communication system, the bandwidth that a carrier may occupy will be relatively large, such as 100MHz, at this time, a carrier with a relatively large bandwidth can be divided into Multiple bandwidth parts to save the power consumption of the terminal.
  • a carrier with a relatively large bandwidth becomes a broadband spectrum, and one broadband spectrum is divided into at least two subbands, and each subband is independent of each other.
  • Figure 5 shows a wideband spectrum, which includes 4 subbands.
  • each subband may also be referred to as a channel detection unit.
  • Each channel detection unit can be pre-determined or pre-configured with its own corresponding channel detection mechanism.
  • pre-definition refers to pre-defined by a communication protocol
  • pre-configuration refers to pre-configuration by the base station to the terminal.
  • the multiple subbands in the broadband spectrum are continuous in the frequency domain, but the possibility that the multiple subbands are not continuous in the spectrum is not excluded.
  • wideband detection mode Since there are at least two subbands in the wideband spectrum, there are two detection modes for the wideband spectrum: wideband detection mode and subband detection mode.
  • the wideband detection mode refers to a detection method in which multiple subbands are regarded as a whole for listening when the channel detection mechanism is used for channel detection, that is, the same channel detection mechanism is used on the wideband spectrum; the subband detection mode refers to When the channel detection mechanism is used for channel detection, each subband is regarded as a separate channel detection unit, and each subband uses its own channel detection mechanism to perform channel detection detection methods.
  • Step 404 When the detection mode is the wideband detection mode, determine the channel detection mechanism corresponding to the wideband spectrum according to at least one of the multiple subbands;
  • the terminal determines the channel detection mechanism corresponding to the wideband spectrum according to the target subband among the multiple subbands.
  • the target subband is one subband or multiple subbands. In this embodiment, the target subband is one subband for illustration.
  • the channel detection mechanism includes LBT Cat.4 under different channel access priorities as an example.
  • the channel detection mechanism corresponding to the target subband is Channel access to the subband with the lowest priority.
  • the channel detection mechanism corresponding to the target subband is the subband with the highest channel access priority, which is not limited in the present disclosure.
  • Step 406 When the detection mode is the subband detection mode, the channel detection mechanism corresponding to each subband is determined according to each subband of the multiple subbands.
  • the channel detection mechanism used by each subband can be independent.
  • the channel detection mechanism used by each subband can be the same or different.
  • LBT Cat.2 is used for subband 1
  • the method provided in this embodiment determines the detection mode on the broadband spectrum.
  • the detection mode is the broadband detection mode
  • the channel detection mechanism corresponding to the broadband spectrum is determined according to at least one of the multiple subbands.
  • the detection mode is a subband detection mode
  • the channel detection mechanism corresponding to each subband is determined according to each subband of the multiple subbands, and different determination methods can be adopted based on different detection modes to determine a more reasonable channel detection mechanism. Thereby achieving fair occupation of channel resources on unlicensed spectrum with other wireless communication systems.
  • determining the channel detection mechanism includes: determining the CWS used by the channel detection mechanism.
  • determining the channel detection mechanism can also include other aspects, such as determining the type of channel detection mechanism used is which of the above five LBT methods, or determining the target for the channel detection mechanism used When determining the type, each specific parameter used in the channel detection mechanism is determined, which is not limited in the present disclosure.
  • each subband is predefined or pre-configured with one CWS, and different CWS correspond to different channel access priorities.
  • the channel detection mechanism corresponding to each subband is shown in one row of parameters in Table 1 or Table 2 above.
  • Step 404 can be implemented as the following steps, as shown in FIG. 6.
  • Step 404a When the detection mode is the broadband detection mode, among the contention window sizes corresponding to multiple subbands, determine the contention window size with the lowest channel access priority;
  • each subband corresponds to its own CWS, and different CWS corresponds to different channel access priorities.
  • the CWS with the lowest channel access priority is determined according to the CWS corresponding to the multiple subbands.
  • the channel access priority is low, which is used to indicate that the listening time slot in the channel listening process is longer or more, but the corresponding channel occupation time will also be longer.
  • Step 404b Determine the contention window size with the lowest channel access priority as the contention window size in the channel detection mechanism corresponding to the broadband spectrum.
  • the detection mode is broadband detection mode
  • CWS 32 used by the terminal on BWP2. That is, the terminal determines the channel detection mechanism on the entire BWP2 according to the channel detection mechanism used by subband 3.
  • the method provided in this embodiment uses the channel detection mechanism corresponding to the target subband with the lowest channel access priority when the broadband detection mode is adopted to determine the channel detection mechanism used on the entire broadband spectrum. This enables wireless communication equipment to accurately determine a reasonable channel detection mechanism, so that it can fairly occupy channel resources on unlicensed spectrum with other communication systems.
  • each subband is predefined or pre-configured with one CWS.
  • Step 404 can be implemented as the following steps, as shown in FIG. 8.
  • Step 406a When the detection mode is the subband detection mode, the channel detection mechanism corresponding to each subband is determined according to the size of the contention window corresponding to each subband.
  • the activated bandwidth part (Band Width Part, BWP) on the terminal is switched from BWP1 to BWP2, BWP1 includes subband 3, and BWP2 includes subband 2 and subband 3.
  • BWP1 includes subband 3
  • BWP2 includes subband 2 and subband 3.
  • the detection mode is subband detection mode
  • the channel detection mechanism corresponding to each sub-band is used to determine the channel detection mechanism used on the entire broadband spectrum, so that the wireless communication device can accurately determine Reasonable channel detection mechanism, which can equitably occupy channel resources on unlicensed spectrum with other communication systems.
  • each subband is predefined or pre-configured with two CWSs: the first CWS and the second CWS.
  • the first CWS is used For the CWS in the broadband detection mode
  • the second CWS is the contention window size for the subband detection mode.
  • Different first CWSs also correspond to different channel access priorities.
  • Step 404 and step 406 can be implemented as the following steps, as shown in FIG. 9.
  • Step 4041 When the detection mode is the broadband detection mode, among the first CWS corresponding to the multiple subbands, determine the first CWS with the lowest channel access priority;
  • Step 4042 Determine the CWS in the channel detection mechanism corresponding to the broadband spectrum according to the first CWS with the lowest channel access priority
  • Step 4061 When the detection mode is the sub-band detection mode, respectively determine the channel detection mechanism corresponding to each sub-band according to the second CWS corresponding to each sub-band.
  • the corresponding CWS on subband 3 is ⁇ 8, 16 ⁇ , where 8 is the first CWS based on the broadband detection mode; 16 is the second CWS based on the subband detection mode.
  • the CWS on subband 2 is ⁇ 16, 32 ⁇ , where 16 is the first CWS value based on the wideband detection mode; 32 is the second CWS based on the subband detection mode.
  • the CWS of subband 3 on BWP2 is adjusted based on 16; the CWS on subband 2 is based on 32 Adjusted; if the detection mode on BWP2 is broadband detection mode, since the first CWS of subband 2 is 8, the first CWS of subband 3 is 16, and the CWS value for broadband detection on BWP2 is adjusted based on 16.
  • the method is executed by the base station, and then in step 402, the base station determines the detection mode of the broadband spectrum by itself. That is, the base station independently determines to use the broadband detection mode or subband detection mode for the broadband spectrum.
  • the method is executed by the terminal.
  • the terminal determines the detection mode of the broadband spectrum by itself, or, after the base station determines the detection mode of the broadband spectrum, the base station reports to the terminal
  • the first BWP switching command is sent, and the first BWP switching command carries the channel detection mechanism on the broadband spectrum.
  • the terminal receives the first bandwidth part BWP switching command, and determines the detection mode on the broadband spectrum according to the first BWP switching command.
  • the method is executed by the base station. After the base station determines the channel detection mechanism on the broadband spectrum, the base station generates a second BWP switching command, which is used to indicate the broadband spectrum The base station sends the second BWP switching command to the terminal; the terminal receives the second BWP switching command; the terminal determines the channel detection mechanism on the broadband spectrum according to the second BWP switching command.
  • the second BWP handover command carries the type and parameters of the channel detection mechanism.
  • the second BWP switching command carries an indication bit, and the indication bit is used to indicate the type and parameter of the channel detection mechanism.
  • the base station and the terminal store the corresponding relationship between the indication bit, the type of the channel detection mechanism, and the parameters of the channel detection mechanism.
  • the following is a device embodiment provided by the present disclosure.
  • the device embodiment corresponds to the above method embodiment.
  • FIG. 11 shows a block diagram of an apparatus for determining a channel detection mechanism provided by an exemplary embodiment of the present disclosure.
  • the device can be implemented as a part of wireless communication equipment.
  • the device is applied to a scenario where a broadband spectrum on an unlicensed spectrum is used for transmission, the broadband spectrum includes multiple subbands, and the device includes:
  • the mode determining module 1120 is configured to determine the detection mode on the broadband frequency spectrum
  • the mechanism determining module 1140 is configured to determine the channel detection mechanism corresponding to the wideband spectrum according to at least one subband of the multiple subbands when the detection mode is the wideband detection mode;
  • the mechanism determining module 1140 is configured to determine the channel detection mechanism corresponding to each subband according to each subband of the multiple subbands when the detection mode is the subband detection mode.
  • the channel detection mechanism includes CWS, and different CWS correspond to different channel access priorities
  • the mode determination module 1120 is configured to determine the CWS with the lowest channel access priority among the CWSs corresponding to the multiple subbands; determine the CWS with the lowest channel access priority as the broadband spectrum CWS in the corresponding channel detection mechanism.
  • the channel detection mechanism includes CWS
  • the mechanism determining module 1140 is configured to determine the channel detection mechanism corresponding to each subband according to the CWS corresponding to each subband.
  • each of the subbands corresponds to the first CWS and the second CWS
  • the first CWS is the CWS used in the broadband detection mode
  • the second CWS is the CWS used in the subband detection mode.
  • the device is applied to a terminal or a base station, and the mechanism determining module is configured to determine the detection mode on the broadband spectrum by itself;
  • the device is applied to a terminal, and the device further includes: a receiving module; the receiving module is configured to receive the first BWP switching command; the mechanism determining module is configured to Determine the detection mode on the broadband frequency spectrum according to the first BWP switching command.
  • the device is applied to a base station, and the device further includes: a sending module; the mechanism determining module 1140 is configured to generate a second BWP handover command, the second BWP handover command It is used to indicate a channel detection mechanism on the broadband spectrum; the sending module is configured to send the second BWP switching command to the terminal.
  • FIG. 12 shows a schematic structural diagram of a wireless communication device provided by an exemplary embodiment of the present disclosure.
  • the wireless communication device may be a terminal or a base station.
  • the wireless communication device includes: a processor 101, a receiver 102, a transmitter 103, and a memory. 104 and bus 105.
  • the processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.
  • the receiver 102 and the transmitter 103 may be implemented as a communication component, and the communication component may be a communication chip.
  • the memory 104 is connected to the processor 101 through a bus 105.
  • the memory 104 may be used to store at least one instruction, and the processor 101 is used to execute the at least one instruction to implement each step in the foregoing method embodiment.
  • the memory 104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes, but is not limited to: magnetic disks or optical disks, electrically erasable and programmable Read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static anytime access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM) .
  • non-transitory computer-readable storage medium including instructions, such as a memory including instructions, which can be executed by a processor to complete the steps in the foregoing method embodiments.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
  • a non-transitory computer-readable storage medium When the instructions in the non-transitory computer storage medium are executed by a processor, the processor can execute the method for determining the channel detection mechanism.

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Abstract

本公开提供了一种信道检测机制的确定方法、装置、设备及存储介质，属于通信领域，所述方法包括：确定所述宽带频谱上的检测模式；当所述检测模式是宽带检测模式时，根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制；当所述检测模式是子带检测模式时，根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制。本公开能够基于不同的检测模式采用不同的确定方式，确定出较为合理的信道检测机制，从而实现与其它无线通信系统在非授权频谱上公平的占用信道资源。

Description

信道检测机制的确定方法、装置、设备及存储介质 技术领域
本公开涉及通信领域，特别涉及一种信道检测机制的确定方法、装置、设备及存储介质。
背景技术
在第三代合作伙伴项目(Third Generation Partnership Project，3GPP)中提出了通过授权频谱辅助接入(License Assisted Access，LAA)的机制来使用非授权频谱。也即，通过授权频谱来辅助实现非授权频谱上的使用。
在LAA中引入了信道检测机制。也即，基站在数据发送前需要检测信道是否处于空闲状态，只有信道处于空闲状态时才能发送数据。
由于信道检测机制存在多种形式，若通信系统所使用的频谱是宽带部分，且该宽带部分包括多个子带部分时，如何选择合理的信道检测机制尚不存在解决方案。
发明内容
本公开实施例提供了一种信道检测机制的确定方法、装置、设备及存储介质，可以用于解决在使用宽带部分(包含多个子带部分)进行传输时，如何选择合理的信道检测机制的问题。所述技术方案如下：
根据本公开的一个方面，提供了一种信道检测机制的确定方法，应用于采用非授权频谱上的宽带频谱进行传输的场景中，所述宽带频谱包括多个子带，所述方法包括：
确定所述宽带频谱上的检测模式；
当所述检测模式是宽带检测模式时，根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制；
当所述检测模式是子带检测模式时，根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制。
在一个可选的实施例中，所述信道检测机制包括竞争窗口大小，不同的竞 争窗口大小对应不同的信道接入优先级；
所述根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制，包括：
在所述多个子带对应的竞争窗口大小中，确定所述信道接入优先级最低的竞争窗口大小；
将所述信道接入优先级最低的竞争窗口大小确定为所述宽带频谱对应的信道检测机制中的竞争窗口大小。
在一个可选的实施例中，所述信道检测机制包括竞争窗口大小；
所述根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制，包括：
根据所述每个子带对应的竞争窗口大小，分别确定所述每个子带对应的信道检测机制。
在一个可选的实施例中，所述每个子带对应第一竞争窗口大小和第二竞争窗口大小，
所述第一竞争窗口大小是用于所述宽带检测模式的竞争窗口大小；
所述第二竞争窗口大小是用于所述子带检测模式的竞争窗口大小。
在一个可选的实施例中，所述确定所述宽带频谱上的检测模式，包括：
自行确定所述宽带频谱上的检测模式；
或，
接收第一带宽部分(Band Width Part，BWP)切换命令；根据所述第一BWP切换命令确定所述宽带频谱上的检测模式。
在一个可选的实施例中，所述方法还包括：
生成第二BWP切换命令，所述第二BWP切换指令用于指示所述宽带频谱上的信道检测机制；
向终端发送所述第二BWP切换命令。
根据本公开的另一方面，提供了一种信道检测机制的确定装置，应用于采用非授权频谱上的宽带频谱进行传输的场景中，所述宽带频谱包括多个子带，所述装置包括：
模式确定模块，被配置为确定所述宽带频谱上的检测模式；
机制确定模块，被配置为当所述检测模式是宽带检测模式时，根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制；
所述机制确定模块，被配置为当所述检测模式是子带检测模式时，根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制。
在一个可选的实施例中，所述信道检测机制包括竞争窗口大小，不同的竞争窗口大小对应不同的信道接入优先级；
所述模式确定模块，被配置为在所述多个子带对应的竞争窗口大小中，确定所述信道接入优先级最低的竞争窗口大小；将所述信道接入优先级最低的竞争窗口大小确定为所述宽带频谱对应的信道检测机制中的竞争窗口大小。
在一个可选的实施例中，所述信道检测机制包括竞争窗口大小；
所述机制确定模块，被配置为根据所述每个子带对应的竞争窗口大小，分别确定所述每个子带对应的信道检测机制。
在一个可选的实施例中，所述每个子带对应第一竞争窗口大小和第二竞争窗口大小，
所述第一竞争窗口大小是用于所述宽带检测模式的竞争窗口大小；
所述第二竞争窗口大小是用于所述子带检测模式的竞争窗口大小。
在一个可选的实施例中，所述装置还包括：接收模块；
所述机制确定模块，被配置为自行确定所述宽带频谱上的检测模式；
或，
所述接收模块，被配置为接收第一BWP切换命令；所述机制确定模块，被配置为根据所述第一BWP切换命令确定所述宽带频谱上的检测模式。
在一个可选的实施例中，所述装置还包括：发送模块；
所述机制确定模块，被配置为生成第二带宽部分BWP切换命令，所述第二BWP切换指令用于指示所述宽带频谱上的信道检测机制；
所述发送模块，被配置为向终端发送所述第二BWP切换命令。
根据本公开的另一方面，提供了一种无线通信设备，所述无线通信设备包括：
处理器；
与所述处理器相连的收发器；
用于存储处理器可执行指令的存储器；
其中，所述处理器被配置为加载并执行所述可执行指令以实现如上方面所述的信道检测机制的确定方法。
根据本公开的另一方面，提供了一种计算机可读存储介质，所述计算机可 读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或指令集由所述处理器加载并执行以实现如上所述的信道检测机制的确定方法。
本公开实施例提供的技术方案带来的有益效果至少包括：
通过确定宽带频谱上的检测模式，当检测模式是宽带检测模式时，根据多个子带中的至少一个子带确定宽带频谱对应的信道检测机制，当检测模式是子带检测模式时，根据多个子带中的每个子带分别确定每个子带对应的信道检测机制，能够基于不同的检测模式采用不同的确定方式，确定出较为合理的信道检测机制，从而实现与其它无线通信系统在非授权频谱上公平的占用信道资源。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本公开涉及的LBT Cat.2的信道侦听示意图；
图2是本公开涉及的LBT Cat.4的信道侦听示意图；
图3是本公开一个示例性实施例提供的无线通信系统的框图；
图4是本公开一个示例性实施例提供的信道检测机制的确定方法的流程图；
图5是本公开一个示例性实施例提供的宽带频谱和子带之间的关系示意图；
图6是本公开另一个示例性实施例提供的信道检测机制的确定方法的流程图；
图7是图6实施例提供的信道检测机制的确定方法的示意性例子的示例图；
图8是本公开另一个示例性实施例提供的信道检测机制的确定方法的流程图；
图9是本公开另一个示例性实施例提供的信道检测机制的确定方法的流程图；
图10是图9实施例提供的信道检测机制的确定方法的示意性例子的示例图；
图11是本公开一个示例性实施例提供的信道检测机制的确定装置的结构示意图；
图12是本公开另一个示例性实施例提供的无线通信设备的结构示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
为了保证与非授权频谱上的其它无线系统共存，比如无线保真系统(WiFi)的共存，在LAA中也引入了在数据发送前需要进行信道检测的机制。在对本公开实施例进行介绍说明之前，首先对本公开中涉及的信道检测机制进行简单介绍。
信道检测机制通常可以包括以下五种：
第一种(Cat.1)：不含LBT(Listen before talk，先听后说)，即无线通信设备在传输信息之前不需要进行信道检测，直接发送信息。LBT也可以称为监听避让机制，用于实现非授权频谱的有效共享。LBT要求在传输信息前先监听信道，进行CCA(Clear Channel Assessment，空闲信道评估)，在确保信道空闲的情况下再进行传输。
第二种(LBT Cat.2)：不含随机退避过程的LBT机制。无线通信设备在传输信息之前，只需要检测一个时间粒度即可，例如时间粒度可以是25us，如果在该时间粒度内信道空闲，那么无线通信设备就可以传输信息；否则，LBT执行失败，无线通信设备不可以传输信息。
示意性的参考图1，无线通信设备执行一个单时隙的CCA侦听，如果在第一个CCA时隙和第三个CCA时隙中对信道的侦听结果为空闲状态，则无线通信设备可以占用该信道进行数据传输；如果在第二个CCA时隙中对信道的侦听结果为忙碌状态，则无线通信设备不可以占用该信道进行数据传输，简称无数据传输。
第三种(LBT Cat.3)：CWS(Contention Window Size，竞争窗口大小)固定的随机退避型LBT机制，发送设备首先在第一时间粒度检测该信道是否空闲，若检测到该信道空闲，在第一竞争窗口内选取随机数的值N，并以第二时间粒度为时间粒度进行信道检测；如果在第二时间粒度检测到该信道空闲，且随机数的值不为0，则将随机数的值减1，并继续以第二时间粒度为时间粒度进行信道检测；如果在第二时间粒度检测到该信道忙，则再次以第一时间粒度为时间 粒度进行信道检测；如果再次在第一时间粒度检测到该信道空闲，且随机数的值不为0，则将随机数的值减1，并恢复以第二时间粒度为时间粒度进行信道检测；直至随机数的值减为0，才表示信道空闲。
第四种(LBT Cat.4)：CWS可变的随机退避型LBT机制。即在LBT Cat.3的基础上，发送设备可以根据前一次传输的结果调整CWS。比如前一次传输过程中的一个参考时间内传输的数据中，没有被正确接收的比例为X，当X大于一个门限时，则CWS值增加。为了细化LBT过程中的参数设置，在LBT Cat.4中设置了四种优先级，每种优先级对应不同的参数配置，不同业务类型的数据传输对应不同的优先级。
LBT Cat.4的原理如下：无线通信设备首先在第一时间粒度检测该信道是否空闲，若检测到该信道空闲，在第一竞争窗口内选取回退计数器(也称随机数)的值N，并以第二时间粒度为时间粒度进行信道检测；如果在第二时间粒度检测到该信道空闲，且回退计数器的值不为0，则将回退计数器的值减1，并继续以第二时间粒度为时间粒度进行信道检测；如果在第二时间粒度检测到该信道忙碌，则再次以第一时间粒度为时间粒度进行信道检测；如果再次在第一时间粒度检测到该信道空闲，且回退计数器的值不为0，则将回退计数器的值减1，并恢复以第二时间粒度为时间粒度进行信道检测；直至回退计数器的值减为0，才表示可以占用该信道。
示意性的参考图2，无线通信设备在0～竞争窗口大小(Contention Windows Size，CWS)之间均匀随机生成一个回退计数器N，并且以侦听时隙(CCA slot)为粒度进行侦听。以第一次物理下行共享信道(Physical Downlink Shared Channel，PDSCH)传输对应的CWS＝15且N＝7为例，在第一个和第二个侦听时隙中，信道侦听结果为空闲状态，N减小为5；在第三个至第六个侦听时隙中，信道侦听结果为忙碌状态，N保持不变，并延时4个侦听时隙后重新开始侦听，在第十一个至第十五个侦听信息中，信道监听结果为空闲状态，N减小到0，无线通信设备开始占用信道进行数据传输。
在该数据传输过程中，若无线通信设备在CWS调整参考子帧中接收到否认反馈(NACK)，则代表数据传输失败，无线通信设备根据这一错误接收状态动态调高CWS＝31，并重新生成回退计数器N＝20，并在第二次PDSCH传输之前采用这一调高的CWS以及回退计数器N进行信道侦听。而且在连续的20个侦听时隙中的信道侦听结果为空闲状态时，占用信道进行数据传输。
其中，不同的竞争窗口大小CWS对应不同的信道接入优先级p。在示意性的例子中，表-1为下行LBT Cat.4四种优先级参数配置，表-2为上行LBT Cat.4四种优先级参数配置，两者只是配置的数值略有不同。
表-1
Figure PCTCN2019078926-appb-000001
表-2
Figure PCTCN2019078926-appb-000002
上述表-1和表-2所示的四种信道接入优先级中，p值越小，对应的信道接入优先级越高。m p是一个延迟时间中所包含ECCA(Extended Clear Channel，延长空闲信道评估)的个数，每个延迟时间是由固定的16us时长和m p个ECCA组成的，即上文介绍的第一时间粒度。CW min,p和CW max,p是最小竞争窗口值和最大竞争窗口值，在LBT过程中的CWS便是在这两个值之间生成的，然后再由0到生成的竞争窗口CW p中随机生成的退避计数器N来决定LBT信道检测过程中退避的时间长短，而T mcot,p是每种优先级对应的LBT Cat.4执行成功之后能占用信道的最大时长，由上表可知相较于优先级1，2而言，优先级3，4的LBT过程的执行时间较长，获得信道接入的机会相对较低，为了保证公平性，使用这两种优先级的数据传输能占用的最大传输时间也相对较长。
第五种：基于帧结构的信道检测机制，即FBE(Frame Based Equipment)。对于FBE，设定一个周期，每个周期的固定位置进行一次信道检测，如在每个CCA检测时间内进行CCA检测。若检测到信道状态为空闲，即可占用信道进行传输，且最大信道占用时间长度固定，到了下个周期的CCA检测时间时再次进行CCA检测；若检测到信道状态为非空闲，则在这个周期内设备不能占用信道，直至等到下一个周期的固定位置继续检测。固定周期是指FBE调度的时域单元， 例如固定周期可以是FFP(Fixed Frame Period，固定帧周期)。固定周期的时长可以由协议预先规定。
需要说明的是，上述五种信道检测机制只是示例性介绍说明，随着通信技术的演进，上述五种信道检测机制可能有所变化，或者有新的信道检测机制产生，但都是适用于本公开描述的技术方案。
本公开实施例描述的网络架构以及业务场景是为了更加清楚地说明本公开实施例的技术方案，并不构成对本公开实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本公开实施例提供的技术方案对于类似的技术问题，同样适用。
图3是根据一示例性实施例示出的一种无线通信系统的示意图。该无线通信系统可以包括：基站310和终端320。
基站310部署在接入网中。5G NR系统中的接入网可以称为NG-RAN(New Generation-Radio Access Network，新一代无线接入网)。基站310与终端320之间通过某种空口技术互相通信，例如可以通过蜂窝技术相互通信。
基站310是一种部署在接入网中用以为终端320提供无线通信功能的装置。基站310可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在5G NR系统中，称为gNodeB或者gNB。随着通信技术的演进，“基站”这一名称可能会变化。为方便描述，本公开实施例中，上述为终端320提供无线通信功能的装置统称为基站。在其它实施例中，基站310也可以成为接入网设备。
终端320的数量通常为多个，每一个基站310所管理的小区内可以分布一个或多个终端320。终端320可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。为方便描述，本公开实施例中，上面提到的设备统称为终端。
本公开实施例中的“5G NR系统”也可以称为5G系统或者NR系统，但本领域技术人员可以理解其含义。本公开实施例描述的技术方案可以适用于5G NR系统，也可以适用于5G NR系统后续的演进系统。该5G NR系统可以用于LAA 场景中。
图4示出了本公开一个示例性实施例提供的信道检测机制的确定方法的流程图。该方法可以由图3所示的基站310或终端320来执行，该方法可以应用于采用非授权频谱上的宽带频谱进行传输的场景中，该方法包括：
步骤402，确定宽带频谱上的检测模式；
宽带频谱是非授权频谱上的频谱。由于在传统的LAA系统中，一个载波的最大带宽是20MHz，而在后续的通信系统中，一个载波可能占用的带宽会比较大，比如100MHz，此时可将一个带宽比较大的载波上划分为多个带宽部分来节省终端的电量消耗。本公开将带宽比较大的载波成为宽带频谱，一个宽带频谱划分为至少两个子带，每个子带互相独立。图5示出了一个宽带频谱，该宽带频谱包括4个子带。
在不同实施例中，每个子带也可称为一个信道检测单位。每个信道检测单位可预定义(Pre-determined)或预配置(Pre-configured)有自身对应的信道检测机制。在本申请实施例中，预定义是指由通信协议预先定义，预配置是指由基站向终端预先配置。
可选地，宽带频谱中的多个子带在频域上是连续的，但不排除该多个子带在频谱上是不连续的可能性。
由于宽带频谱中存在至少两个子带，因此对于宽带频谱的检测模式包括两种：宽带检测模式和子带检测模式。
宽带检测模式是指在采用信道检测机制进行信道侦听时，将多个子带视为整体进行侦听的检测方式，也即在宽带频谱上使用同一种信道检测机制；子带检测模式是指在采用信道检测机制进行信道侦听时，将每个子带分别视为一个单独的信道检测单位，每个子带分别使用各自的信道检测机制进行信道侦听的检测方式。
步骤404，当检测模式是宽带检测模式时，根据多个子带中的至少一个子带确定宽带频谱对应的信道检测机制；
终端根据多个子带中的目标子带，确定宽带频谱对应的信道检测机制。目标子带是一个子带或多个，本实施例以目标子带是一个子带来举例说明。
由于每个信道检测单位预定义或预配置有自身对应的信道检测机制，以信道检测机制包括不同信道接入优先级下的LBT Cat.4来举例说明，目标子带所对 应的信道检测机制是信道接入优先级最低的子带。在某些实施例中，目标子带所对应的信道检测机制是信道接入优先级最高的子带，本公开对此不限定。
步骤406，当检测模式是子带检测模式时，根据多个子带中的每个子带分别确定每个子带对应的信道检测机制。
在子带检测模式时，每个子带所使用的信道检测机制可以各自独立。每个子带所使用的信道检测机制可以相同，也可以不相同。
比如，存在至少两个子带所使用的信道检测机制的类型是不同的。示意性的如图5所示，对子带1采用LBT Cat.2，对子带2采用CWS＝16的LBT Cat.4。又比如，存在至少两个子带所使用的信道检测机制的参数是不同的，示意性的如图5所示，对子带2采用CWS＝16的LBT Cat.4，对子带3采用CWS＝32的LBT Cat.4。
综上所述，本实施例提供的方法，通过确定宽带频谱上的检测模式，当检测模式是宽带检测模式时，根据多个子带中的至少一个子带确定宽带频谱对应的信道检测机制，当检测模式是子带检测模式时，根据多个子带中的每个子带分别确定每个子带对应的信道检测机制，能够基于不同的检测模式采用不同的确定方式，确定出较为合理的信道检测机制，从而实现与其它无线通信系统在非授权频谱上公平的占用信道资源。
在本公开的很多实施例中，由于宽带频谱上所使用的信道检测机制有很大可能是LBT Cat.4，因此“确定信道检测机制”包括：确定信道检测机制所使用的CWS。
但基于相同的原理，确定信道检测机制也可包括其他方面，比如：确定所使用的信道检测机制的类型是上述五种LBT方式中的哪一种，或者，针对所使用的信道检测机制是目标类型时，确定该信道检测机制中所使用的各个具体的参数，本公开对此不加以限定。
在基于图4的可选实施例中，以各个子带均采用LBT Cat.4为例，每个子带预定义或预配置有一个CWS，不同的CWS对应不同的信道接入优先级。比如，每个子带所对应的信道检测机制如上表一或表二中的一行参数所示。步骤404可实现成为如下几个步骤，如图6所示。
步骤404a，当检测模式是宽带检测模式时，在多个子带对应的竞争窗口大 小中，确定信道接入优先级最低的竞争窗口大小；
示意性的，每个子带对应各自的CWS，不同的CWS对应不同的信道接入优先级。
对于包含多个子带的宽带传输(采用宽带检测模式时)，根据多个子带对应的CWS中，确定出信道接入优先级最低的CWS。信道接入优先级低，用于表示在信道侦听过程中的侦听时隙较长或较多，但相应获取到的信道占用时间也会变长。
步骤404b，将信道接入优先级最低的竞争窗口大小，确定为宽带频谱对应的信道检测机制中的竞争窗口大小。
结合如图7所示的示意性例子中，终端上激活的带宽部分(Band Width Part，BWP)从BWP1切换至BWP2，BWP1包含子带3，BWP2包含子带2和子带3。假设子带2对应的CWS＝16，子带3对应的CWS＝32，CWS＝32对应的信道接入优先级低于CWS＝16对应的信道接入优先级，当检测模式为宽带检测模式时，终端在BWP2上所使用的CWS＝32。也即，终端根据子带3所使用的信道检测机制，确定在整个BWP2上的信道检测机制。
综上所述，本实施例提供的方法，当采用宽带检测模式时，采用信道接入优先级最低的目标子带所对应的信道检测机制，确定整个宽带频谱上使用的信道检测机制，能够有效地使无线通信设备准确地确定合理的信道检测机制，从而可以与其他通信系统在非授权频谱上公平的占用信道资源。
在基于图4的可选实施例中，以各个子带均采用LBT Cat.4为例，每个子带预定义或预配置有一个CWS。步骤404可实现成为如下几个步骤，如图8所示。
步骤406a，当检测模式是子带检测模式时，根据每个子带对应的竞争窗口大小，分别确定每个子带对应的信道检测机制。
对于包含多个子带的宽带传输(采用子带检测模式时)，按照每个子带对应的CWS，确定该子带所使用的信道检测机制。也即，每个子带互相独立，每个子带采用相同或不同的信道检测机制。可选地，存在至少两个子带所使用的信道检测机制是不同的。
结合如图7所示的示意性例子中，终端上激活的带宽部分(Band Width Part，BWP)从BWP1切换至BWP2，BWP1包含子带3，BWP2包含子带2和子带3。假设子带2对应的CWS＝16，子带3对应的CWS＝32，CWS＝32对应的信道接 入优先级低于CWS＝16对应的信道接入优先级，当检测模式为子带检测模式时，终端在子带2采用CWS＝16的LBT Cat.4，在子带3上采用CWS＝32的LBT Cat.4。
综上所述，本实施例提供的方法，当采用子带检测模式时，采用每个子带所对应的信道检测机制，确定整个宽带频谱上使用的信道检测机制，能够使无线通信设备准确地确定合理的信道检测机制，从而可以与其他通信系统在非授权频谱上公平的占用信道资源。
在基于图4的可选实施例中，以各个子带均采用LBT Cat.4为例，每个子带预定义或预配置有两个CWS：第一CWS和第二CWS，第一CWS是用于宽带检测模式的CWS，第二CWS是用于子带检测模式的竞争窗口大小。不同的第一CWS还对应不同的信道接入优先级。步骤404和步骤406可实现成为如下几个步骤，如图9所示。
步骤4041，当检测模式是宽带检测模式时，在多个子带对应的第一CWS中，确定信道接入优先级最低的第一CWS；
步骤4042，根据信道接入优先级最低的第一CWS，确定宽带频谱对应的信道检测机制中的CWS；
步骤4061，当检测模式是子带检测模式时，根据每个子带对应的第二CWS，分别确定每个子带对应的信道检测机制。
在如图10所示的示意性例子中，子带3上对应的CWS是{8，16}，其中8是基于宽带检测模式的第一CWS；16是基于子带检测模式的第二CWS。子带2上的CWS是{16,32}，其中16是基于宽带检测模式的第一CWS值；32是基于子带检测模式的第二CWS。那么当激活的BWP从BWP1切换到BWP2后，若BWP2上的检测模式是子带检测模式，那么BWP2上的子带3的CWS是基于16进行调整的；子带2上的CWS是基于32进行调整的；若BWP2上的检测模式是宽带检测模式，由于子带2的第一CWS是8，子带3的第一CWS是16,BWP2上进行宽带检测的CWS值是基于16进行调整的。
在基于上述各个实施例的可选实施例中，该方法由基站来执行，则在步骤402中由基站自行确定宽带频谱的检测模式。也即，由基站自主确定对宽带频谱使用宽带检测模式或子带检测模式。
在基于上述各个实施例的可选实施例中，该方法由终端来执行，则在步骤 402中由终端自行确定宽带频谱的检测模式，或者，由基站确定宽带频谱的检测模式后，基站向终端发送第一BWP切换命令，该第一BWP切换命令中携带有宽带频谱上的信道检测机制，终端接收第一带宽部分BWP切换命令，根据第一BWP切换命令确定宽带频谱上的检测模式。
在基于上述各个实施例的可选实施例中，该方法由基站来执行，基站在确定宽带频谱上的信道检测机制后，基站生成第二BWP切换命令，第二BWP切换命令用于指示宽带频谱上的信道检测机制；基站向终端发送第二BWP切换命令；终端接收第二BWP切换命令；终端根据第二BWP切换命令确定宽带频谱上的信道检测机制。
可选地，第二BWP切换命令携带有信道检测机制的类型以及参数。或者，第二BWP切换命令携带有指示比特位，该指示比特位用于指示信道检测机制的类型以及参数。基站和终端中存储有指示比特位、信道检测机制的类型以及信道检测机制的参数三者之间的对应关系。
以下为本公开提供的装置实施例，该装置实施例与上述方法实施例对应，对于装置实施例中未详细描述的技术细节，可结合参考上述方法实施例，不再一一赘述。
图11示出了本公开一个示意性实施例提供的信道检测机制的确定装置的框图。该装置可以实现成为无线通信设备的一部分。该装置应用于采用非授权频谱上的宽带频谱进行传输的场景中，所述宽带频谱包括多个子带，所述装置包括：
模式确定模块1120，被配置为确定所述宽带频谱上的检测模式；
机制确定模块1140，被配置为当所述检测模式是宽带检测模式时，根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制；
所述机制确定模块1140，被配置为当所述检测模式是子带检测模式时，根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制。
在一个可选的实施例中，所述信道检测机制包括CWS，不同的CWS对应不同的信道接入优先级；
所述模式确定模块1120，被配置为在所述多个子带对应的CWS中，确定所述信道接入优先级最低的CWS；将所述信道接入优先级最低的CWS确定为所述宽带频谱对应的信道检测机制中的CWS。
在一个可选的实施例中，所述信道检测机制包括CWS；
所述机制确定模块1140，被配置为根据所述每个子带对应的CWS，分别确定所述每个子带对应的信道检测机制。
在一个可选的实施例中，所述每个子带对应第一CWS和第二CWS，
所述第一CWS是用于所述宽带检测模式的CWS；
所述第二CWS是用于所述子带检测模式的CWS。
在一个可选的实施例中，所述装置应用于终端或基站中，所述机制确定模块，被配置为自行确定所述宽带频谱上的检测模式；
在一个可选的实施例中，所述装置应用于终端中，所述装置还包括：接收模块；所述接收模块，被配置为接收第一BWP切换命令；所述机制确定模块，被配置为根据所述第一BWP切换命令确定所述宽带频谱上的检测模式。
在一个可选的实施例中，所述装置应用于基站中，所述装置还包括：发送模块；所述机制确定模块1140，被配置为生成第二BWP切换命令，所述第二BWP切换指令用于指示所述宽带频谱上的信道检测机制；所述发送模块，被配置为向终端发送所述第二BWP切换命令。
图12示出了本公开一个示例性实施例提供的无线通信设备的结构示意图，该无线通信设备可以是终端或基站，该无线通信设备包括：处理器101、接收器102、发射器103、存储器104和总线105。
处理器101包括一个或者一个以上处理核心，处理器101通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器102和发射器103可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器104通过总线105与处理器101相连。
存储器104可用于存储至少一个指令，处理器101用于执行该至少一个指令，以实现上述方法实施例中的各个步骤。
此外，存储器104可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，静态随时存取存储器(SRAM)，只读存储器(ROM)，磁存储器，快闪存储器，可编程只读存储器(PROM)。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器，上述指令可由处理器执行以完成上述方法实施例中的各个步骤。例如，所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
一种非临时性计算机可读存储介质，当所述非临时性计算机存储介质中的指令由处理器执行时，使得处理器能够执行上述信道检测机制的确定方法。
上述本公开实施例序号仅仅为了描述，不代表实施例的优劣。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本公开的较佳实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

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  1. 一种信道检测机制的确定方法，其特征在于，应用于采用非授权频谱上的宽带频谱进行传输的场景中，所述宽带频谱包括多个子带，所述方法包括：
    确定所述宽带频谱上的检测模式；
    当所述检测模式是宽带检测模式时，根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制；
    当所述检测模式是子带检测模式时，根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制。
  2. 根据权利要求1所述的方法，其特征在于，所述信道检测机制包括竞争窗口大小，不同的竞争窗口大小对应不同的信道接入优先级；
    所述根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制，包括：
    在所述多个子带对应的竞争窗口大小中，确定所述信道接入优先级最低的竞争窗口大小；
    将所述信道接入优先级最低的竞争窗口大小确定为所述宽带频谱对应的信道检测机制中的竞争窗口大小。
  3. 根据权利要求1所述的方法，其特征在于，所述信道检测机制包括竞争窗口大小；
    所述根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制，包括：
    根据所述每个子带对应的竞争窗口大小，分别确定所述每个子带对应的信道检测机制。
  4. 根据权利要求1至3任一所述的方法，其特征在于，所述每个子带对应第一竞争窗口大小和第二竞争窗口大小，
    所述第一竞争窗口大小是用于所述宽带检测模式的竞争窗口大小；
    所述第二竞争窗口大小是用于所述子带检测模式的竞争窗口大小。
  5. 根据权利要求1至3任一所述的方法，其特征在于，所述确定所述宽带频谱上的检测模式，包括：
    自行确定所述宽带频谱上的检测模式；
    或，
    接收第一带宽部分BWP切换命令；根据所述第一BWP切换命令确定所述宽带频谱上的检测模式。
  6. 根据权利要求1至3任一所述的方法，其特征在于，所述方法还包括：
    生成第二带宽部分BWP切换命令，所述第二BWP切换指令用于指示所述宽带频谱上的信道检测机制；
    向终端发送所述第二BWP切换命令。
  7. 一种信道检测机制的确定装置，其特征在于，应用于采用非授权频谱上的宽带频谱进行传输的场景中，所述宽带频谱包括多个子带，所述装置包括：
    模式确定模块，被配置为确定所述宽带频谱上的检测模式；
    机制确定模块，被配置为当所述检测模式是宽带检测模式时，根据所述多个子带中的至少一个子带确定所述宽带频谱对应的信道检测机制；
    所述机制确定模块，被配置为当所述检测模式是子带检测模式时，根据所述多个子带中的每个子带分别确定所述每个子带对应的信道检测机制。
  8. 根据权利要求7所述的装置，其特征在于，所述信道检测机制包括竞争窗口大小，不同的竞争窗口大小对应不同的信道接入优先级；
    所述模式确定模块，被配置为在所述多个子带对应的竞争窗口大小中，确定所述信道接入优先级最低的竞争窗口大小；将所述信道接入优先级最低的竞争窗口大小确定为所述宽带频谱对应的信道检测机制中的竞争窗口大小。
  9. 根据权利要求7所述的装置，其特征在于，所述信道检测机制包括竞争窗口大小；
    所述机制确定模块，被配置为根据所述每个子带对应的竞争窗口大小，分别确定所述每个子带对应的信道检测机制。
  10. 根据权利要求7至9任一所述的装置，其特征在于，所述每个子带对应第一竞争窗口大小和第二竞争窗口大小，
    所述第一竞争窗口大小是用于所述宽带检测模式的竞争窗口大小；
    所述第二竞争窗口大小是用于所述子带检测模式的竞争窗口大小。
  11. 根据权利要求7至9任一所述的装置，其特征在于，所述装置还包括：接收模块；
    所述机制确定模块，被配置为自行确定所述宽带频谱上的检测模式；
    或，
    所述接收模块，被配置为接收第一带宽部分BWP切换命令；所述机制确定模块，被配置为根据所述第一BWP切换命令确定所述宽带频谱上的检测模式。
  12. 根据权利要求7至9任一所述的装置，其特征在于，所述装置还包括：发送模块；
    所述机制确定模块，被配置为生成第二带宽部分BWP切换命令，所述第二BWP切换指令用于指示所述宽带频谱上的信道检测机制；
    所述发送模块，被配置为向终端发送所述第二BWP切换命令。
  13. 一种无线通信设备，其特征在于，所述无线通信设备包括：
    处理器；
    与所述处理器相连的收发器；
    用于存储处理器可执行指令的存储器；
    其中，所述处理器被配置为加载并执行所述可执行指令以实现如权利要求1至6任一所述的信道检测机制的确定方法。
  14. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或指令集由所述处理器加载并执行以实现如权利要求1至6任一所述的信道检测机制的确定方法。
PCT/CN2019/078926 2019-03-20 2019-03-20 信道检测机制的确定方法、装置、设备及存储介质 WO2020186489A1 (zh)

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