WO2020063167A1 - Procédé d'ajustement de taille de fenêtre de conflit et dispositif de réseau - Google Patents

Procédé d'ajustement de taille de fenêtre de conflit et dispositif de réseau Download PDF

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Publication number
WO2020063167A1
WO2020063167A1 PCT/CN2019/100534 CN2019100534W WO2020063167A1 WO 2020063167 A1 WO2020063167 A1 WO 2020063167A1 CN 2019100534 W CN2019100534 W CN 2019100534W WO 2020063167 A1 WO2020063167 A1 WO 2020063167A1
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Prior art keywords
basic bandwidth
cws
basic
harq
bandwidth
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PCT/CN2019/100534
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English (en)
Chinese (zh)
Inventor
鲁智
姜蕾
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维沃移动通信有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present application relates to the field of communications, and in particular, to a contention window size (CWS) adjustment method and a network device.
  • CWS contention window size
  • the terminal device After receiving the physical downlink shared channel (PDSCH), the terminal device usually needs to feedback a Hybrid Automatic Repeat Request (HARQ) response.
  • the HARQ response includes an acknowledgment (ACKnowledgement, ACK) and a negative response. (Negative-ACKnowledgment, NACK), etc.
  • ACK acknowledgement
  • NACK Negative-ACKnowledgment
  • New wireless or New Radio supports broadband operations greater than 20M.
  • network devices can currently schedule multiple basic bandwidths for terminal devices, but the next time, network devices will still be based on each basic bandwidth. Listen before talk (LBT) for the unit. Therefore, the network device needs to adjust the CWS corresponding to each basic bandwidth when scheduling multiple basic bandwidths.
  • LBT Listen before talk
  • the related art does not provide a related solution for adjusting CWS in a broadband operation scenario. Therefore, how to adjust the CWS in a broadband operation scenario is a technical problem that the related technologies need to solve urgently.
  • the purpose of some embodiments of the present disclosure is to provide a CWS adjustment method in unlicensed spectrum transmission for adjusting CWS in a broadband operation scenario.
  • a CWS adjustment method in unlicensed spectrum transmission is provided.
  • the method is performed by a network device.
  • the method includes: receiving multiple HARQ responses, and downlink channels corresponding to the multiple HARQ responses are in a reference time unit.
  • One or / or multiple basic bandwidths are occupied internally; the number of HARQ responses for one basic bandwidth is determined; and the CWS corresponding to the one basic bandwidth is adjusted based on the ratio of NACKs in the one basic bandwidth.
  • a network device including: a receiving module configured to receive multiple HARQ responses, and the downlink channels corresponding to the multiple HARQ responses occupy one and / or multiple basic bandwidths within a reference time unit; A determining module is configured to determine the number of HARQ responses of a basic bandwidth; a CWS adjustment module is configured to adjust a CWS corresponding to the one basic bandwidth based on a ratio of NACKs in the one basic bandwidth.
  • a network device includes a processor, a memory, and a computer program stored on the memory and executable on the processor.
  • the computer program is executed by the processor, The steps of implementing the CWS adjustment method in the unlicensed spectrum transmission according to the first aspect.
  • a computer-readable storage medium stores a computer program that, when executed by a processor, implements CWS adjustment in the unlicensed spectrum transmission according to the first aspect. Method steps.
  • the network device may determine the number of HARQ responses of the basic bandwidth and adjust the CWS based on the ratio of NACK in the basic bandwidth, thereby solving the problem of adjusting the CWS in a broadband operation scenario. , Which is conducive to improving the utilization efficiency of unlicensed frequency bands.
  • FIG. 1 is a schematic flowchart of a CWS adjustment method in unlicensed spectrum transmission according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a CWS adjustment method in unlicensed spectrum transmission according to another embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of PDSCH occupying multiple basic bandwidths according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a CWS adjustment method in unlicensed spectrum transmission according to still another embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a CWS adjustment method in unlicensed spectrum transmission according to still another embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of a CWS adjustment method in unlicensed spectrum transmission according to a next embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a network device according to another embodiment of the present disclosure.
  • GSM Global System for Mobile
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the terminal device may include, but is not limited to, a mobile station (MS), a mobile terminal (Mobile), a mobile phone (Mobile), a user equipment (User Equipment, UE), and a mobile phone ( handset), portable equipment (portable equipment), vehicles (vehicle), etc.
  • the terminal equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal equipment can be a mobile phone (Also known as a “cellular” phone), a computer with wireless communication capabilities, etc.
  • the terminal device may also be a portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile device.
  • the network device is a device that is deployed in a wireless access network to provide a wireless communication function for a terminal device.
  • the network device may be a base station, and the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like.
  • the names of devices with base station capabilities may vary.
  • eNB Evolved NodeB
  • 3G 3rd Generation
  • Node B Node B
  • Network equipment, etc. but the wording does not constitute a restriction.
  • network equipment can schedule multiple basic bandwidths simultaneously to improve transmission efficiency.
  • the HARQ response fed back by the terminal device since it is still unknown in which basic bandwidth the HARQ response fed back by the terminal device should be allocated, it is impossible to adjust the CWS based on the ratio of NACK in the basic bandwidth.
  • an embodiment of the present disclosure provides a CWS adjustment method 100 in un-license spectrum transmission for adjusting CWS in a broadband operation scenario.
  • This method embodiment 100 can be executed by a network device and includes the following steps:
  • S102 Receive multiple HARQ responses, and the downlink channels corresponding to the multiple HARQ responses occupy one and / or multiple basic bandwidths within a reference time unit.
  • the multiple HARQ responses are sent by the terminal device based on the received downlink channels.
  • These downlink channels include, for example, Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH), etc .
  • the network device Before step S102, the network device will send a downlink channel to a different terminal device within a reference time unit. In this way, after receiving the downlink channel, the terminal device can feedback a HARQ response to inform the network device whether the reception is correct and assist the network device to perform Determine if subsequent retransmissions are required.
  • the multiple HARQ responses are feedbacks from the terminal device on the downlink channel sent by the network device within the reference time unit.
  • the above reference time unit may be a start time slot that the network device executes most recently and includes at least one downlink transmission time slot.
  • the HARQ response includes ACK, NACK, or Discontinuous Transmission (DTX).
  • the basic bandwidth mentioned in the embodiments of the present disclosure may have a frequency range of 20 MHz, and may specifically be a component carrier in carrier aggregation.
  • Carrier aggregation may use multiple component carriers to perform uplink or downlink transmission. For example, three 20-MHz component carriers are aggregated to support a 60-MHz bandwidth transmission, and the multiple component carriers may be adjacent to each other or not adjacent to each other in the frequency domain.
  • the multiple HARQ responses received in step S102 are usually from multiple terminal devices, and for the above multiple terminal devices:
  • the network device may schedule multiple basic bandwidths for some terminal devices within a reference time unit; at the same time, only one basic bandwidth may be scheduled for other terminal devices.
  • the network device may also schedule multiple basic bandwidths for each of the multiple terminal devices in the reference time unit.
  • the network device may also schedule a basic bandwidth for the multiple terminal devices in the reference time unit, that is, the network device does not schedule any one terminal device to span multiple basic bandwidths in the reference time unit.
  • the network device may also schedule a basic bandwidth for the multiple terminal devices in the reference time unit, that is, the network device does not schedule any one terminal device to span multiple basic bandwidths in the reference time unit.
  • some embodiments of the present disclosure do not limit how many basic bandwidths the network device schedules.
  • S104 Determine the number of HARQ responses of a basic bandwidth.
  • the network device may allocate HARQ responses (specifically, the number of HARQ responses) for each basic bandwidth based on the received multiple HARQ responses.
  • the multiple HARQ responses include a first HARQ response and a second HARQ response, wherein a downlink channel corresponding to the first HARQ response occupies a basic bandwidth within a reference time unit; a downlink channel corresponding to the second HARQ response is at all The reference time unit occupies multiple basic bandwidths.
  • the number of the first HARQ response is usually allocated to a corresponding basic bandwidth, and does not need to be allocated to other basic bandwidths. The following describes how to allocate the number of second HARQs among the multiple basic bandwidths.
  • the multiple HARQ responses received by the network device include N second HARQ responses, and the downlink channels corresponding to the N second HARQ responses all occupy M of the same basic bandwidth in the reference time unit, and M and N are both Is an integer greater than 2.
  • the network device may allocate N / M second HARQ responses for one basic bandwidth, that is, the network device allocates the received second HARQ responses evenly for one basic bandwidth.
  • the network device may allocate N second HARQ responses for one basic bandwidth, that is, all the second HARQ responses received for one basic bandwidth.
  • the network device may allocate the second HARQ responses fed back by some terminal devices to one basic bandwidth, allocate the second HARQ responses fed back from other terminal devices to another basic bandwidth, and so on.
  • the network device may regard the HARQ response of the terminal device as a DTX state.
  • the network device may use DTX as a NACK for statistics.
  • the network device only counts DTX as one NACK, so as to avoid the problem of repeated statistics caused by the terminal device's subsequent successful feedback of the HARQ response for the downlink channel.
  • the network device may not perform statistics on DTX as a NACK. Whether DXT is counted as NACK may depend on the specific implementation scenario and specific implementation requirements of this embodiment, and is not limited here.
  • one basic bandwidth is mentioned in this step and subsequent steps, and if the downlink channels corresponding to the multiple HARQ responses received occupy a basic bandwidth within the reference time unit, the “one basic bandwidth” here "Refers to the above-mentioned one basic bandwidth; if the downlink channels corresponding to the received multiple HARQ responses occupy multiple basic bandwidths within the reference time unit, the" one basic bandwidth "here may refer to the above-mentioned multiple basic bandwidths. Either basic bandwidth.
  • steps S104 and S106 of this embodiment that the number of HARQ responses for one basic bandwidth is determined, and the CWS is adjusted based on the ratio of NACK in the basic bandwidth.
  • the method provided in this embodiment can be used to determine the number of HARQ responses for each basic bandwidth, and adjust the CWS based on the ratio of NACK in each basic bandwidth.
  • the "adjustment” in it can also be replaced with other terms, for example, “adjust” the CWS, “increase or decrease” the CWS, or “control” the CWS, and so on.
  • the number of HARQ responses for each basic bandwidth can be determined through step S104. Since the HARQ response includes a NACK, this step can target each basic bandwidth:
  • the CWS corresponding to the basic bandwidth is set to the minimum value of the current priority level.
  • the above reference value may specifically be 50%, 80%, or the like.
  • adjusting the CWS corresponding to the basic bandwidth to the next higher allowable value of the current priority level and maintaining the increased value may include:
  • the ratio of the NACK in the basic bandwidth is equal to or greater than the reference value, and the CWS is less than the maximum CWS, adjust the CWS corresponding to the basic bandwidth to a higher allowable value under the current priority level and maintain the increased value; or
  • the CWS corresponding to the basic bandwidth is maintained as the maximum CWS.
  • step S106 shows a specific implementation manner of the foregoing step S106.
  • step S106 may also be implemented in other manners, and some embodiments of the present disclosure are not limited thereto.
  • a network device when a network device receives multiple HARQ responses, it can determine the number of HARQ responses for each basic bandwidth, and based on the ratio of NACKs in each basic bandwidth Adjusting the CWS solves the problem of adjusting the CWS in a broadband operation scenario and is beneficial to improving the utilization efficiency of the unlicensed frequency band.
  • another embodiment of the present disclosure provides a CWS adjustment method 200 in unlicensed spectrum transmission for adjusting CWS in a broadband operation scenario.
  • the method may be performed by a network device and includes the following steps:
  • S202 Receive multiple HARQ responses, where the multiple HARQ responses include a first HARQ response and a second HARQ response.
  • the downlink channel corresponding to the first HARQ response occupies one basic bandwidth in the reference time unit; the downlink channel corresponding to the second HARQ response occupies multiple basic bandwidths in the reference time unit.
  • the multiple HARQ responses are feedbacks from the terminal device on the downlink channel sent by the network device within the reference time unit.
  • the above reference time unit may be a start time slot that the network device executes most recently and includes at least one downlink transmission time slot.
  • the HARQ response includes ACK, NACK, or DTX.
  • the network device may regard the HARQ response of the terminal device as a DTX state.
  • the network device may use DTX as a NACK for statistics.
  • the network device only counts DTX as one NACK, so as to avoid the problem of repeated statistics caused by the terminal device's subsequent successful feedback of the HARQ response for the downlink channel.
  • the network device may not perform statistics on DTX as a NACK. Whether DXT is counted as NACK may depend on the specific implementation scenario and specific implementation requirements of this embodiment, and is not limited here.
  • S204 Allocate the second HARQ response to the multiple basic bandwidths according to a preset ratio.
  • the number of HARQ responses of a basic bandwidth, the number of first HARQ responses corresponding to the basic bandwidth, and the number of the second HARQ responses plus a preset weight are related.
  • the preset weight is equal to an inverse of the number of the plurality of basic bandwidths.
  • the first HARQ response received is allocated to the basic bandwidth; in special cases, there may be no terminal device that schedules a basic bandwidth, That is, the network device schedules multiple basic bandwidths for the terminal device within a reference time unit.
  • the received second HARQ response is allocated to the multiple basic bandwidths according to a preset ratio (equivalent to the above plus a preset weight).
  • the preset ratio here may be Equal proportions can also be any other proportion.
  • the network device schedules 2 basic bandwidths for the terminal A in the reference time unit, that is, the PDSCH sent by the network device to the terminal A in the reference time unit occupies two basic bandwidths, each of which is 20MHZ, which is called the first basic bandwidth (one in the high frequency domain) and the second basic bandwidth (one in the low frequency domain).
  • terminal A feeds back an eight-bit HARQ response of 00100000 (that is, the second HARQ response described above), which can indicate that the network device sends data through eight CBGs, that is, the first CBG to the eighth CBG, and the terminal device fails to decode the third CBG.
  • the above 1 indicates that decoding has failed, and 0 indicates that decoding has succeeded.
  • step S204 for each terminal device that schedules multiple basic bandwidths, the second HARQ response received is allocated to the above according to a preset ratio. Multiple basic bandwidths, and finally the sum of the number of second HARQ responses allocated to each basic bandwidth and the number of first HARQ responses corresponding to the basic bandwidth are taken as the number of HARQ responses in each basic bandwidth.
  • the preset ratio is an inverse of the number of the plurality of basic bandwidths, that is, the second HARQ response received is evenly allocated to each basic bandwidth.
  • the number of HARQ responses for each basic bandwidth can be determined through step S204. Since the HARQ response includes a NACK, this step can target each basic bandwidth:
  • the CWS corresponding to the basic bandwidth is set to the minimum value of the current priority level.
  • the above reference value may specifically be 50%, 80%, or the like.
  • adjusting the CWS corresponding to the basic bandwidth to the next higher allowable value of the current priority level and maintaining the increased value includes:
  • the ratio of the NACK in the basic bandwidth is equal to or greater than the reference value, and the CWS is less than the maximum CWS, adjust the CWS corresponding to the basic bandwidth to a higher allowable value under the current priority level and keep the increased value; or
  • the CWS corresponding to the basic bandwidth is maintained as the maximum CWS.
  • step S206 shows a specific implementation manner of the foregoing step S206.
  • step S206 may also be implemented in other manners, and some embodiments of the present disclosure are not limited thereto.
  • a network device when a network device receives multiple HARQ responses, it can determine the number of HARQ responses for each basic bandwidth, and based on a negative response NACK within each basic bandwidth.
  • the ratio adjustment CWS solves the problem of adjusting the CWS in a broadband operation scenario and is conducive to improving the utilization efficiency of unlicensed frequency bands.
  • an embodiment of the present disclosure provides a CWS adjustment method 400 in unlicensed spectrum transmission for adjusting CWS in a broadband operation scenario.
  • the method may be performed by a network device and includes the following steps:
  • S402 Receive multiple HARQ responses, where the multiple HARQ responses include a first HARQ response and a second HARQ response.
  • the downlink channel corresponding to the first HARQ response occupies one basic bandwidth in the reference time unit; the downlink channel corresponding to the second HARQ response occupies multiple basic bandwidths in the reference time unit.
  • the multiple HARQ responses are feedbacks from the terminal device on the downlink channel sent by the network device within the reference time unit.
  • the above reference time unit may be a start time slot that the network device executes most recently and includes at least one downlink transmission time slot.
  • the HARQ response includes ACK, NACK, or DTX.
  • the network device may regard the HARQ response of the terminal device as a DTX state.
  • the network device may use DTX as a NACK for statistics.
  • the network device only counts DTX as one NACK, so as to avoid the problem of repeated statistics caused by the terminal device's subsequent successful feedback of the HARQ response for the downlink channel.
  • the network device may not perform statistics on DTX as a NACK. Whether DXT is counted as NACK may depend on the specific implementation scenario and specific implementation requirements of this embodiment, and is not limited here.
  • the number of HARQ responses of a basic bandwidth the number of the first HARQ responses corresponding to the basic bandwidth, and the sum of the number of the second HARQ responses.
  • the first HARQ response received is allocated to the basic bandwidth; in special cases, there may be no terminal device that schedules a basic bandwidth, That is, the network device schedules multiple basic bandwidths for the terminal device within a reference time unit.
  • the received second HARQ response is allocated to each of the multiple basic bandwidths.
  • the network device schedules two basic bandwidths for terminal A within a reference time unit, each of which is 20 MHz, and is referred to as the first basic bandwidth (one in the high-frequency domain) and the second basic bandwidth. (One in the low frequency domain).
  • terminal A feeds back an eight-bit HARQ response of 00100000 (that is, the second HARQ response described above), which can indicate that the network device sends data through eight CBGs, that is, the first CBG to the eighth CBG, and the terminal device fails to decode the third CBG.
  • the above 1 indicates that decoding has failed, and 0 indicates that decoding has succeeded.
  • step S404 for each terminal device that schedules multiple basic bandwidths, the second HARQ response received is allocated to the multiple basic devices.
  • the bandwidth the sum of the number of second HARQ responses allocated to each basic bandwidth and the number of first HARQ responses corresponding to the basic bandwidth are taken as the number of HARQ responses in each basic bandwidth.
  • the number of HARQ responses for each basic bandwidth can be determined through step S404. Since the HARQ response includes a NACK, this step can target each basic bandwidth:
  • the CWS corresponding to the basic bandwidth is set to the minimum value of the current priority level.
  • the above reference value may specifically be 50%, 80%, or the like.
  • adjusting the CWS corresponding to the basic bandwidth to the next higher allowable value of the current priority level and maintaining the increased value includes:
  • the ratio of the NACK in the basic bandwidth is equal to or greater than the reference value, and the CWS is less than the maximum CWS, adjust the CWS corresponding to the basic bandwidth to a higher allowable value under the current priority level and maintain the increased value; or
  • the CWS corresponding to the basic bandwidth is maintained as the maximum CWS.
  • step S406 may also be implemented in other manners, and some embodiments of the present disclosure are not limited thereto.
  • a network device when a network device receives multiple HARQ responses, it can determine the number of HARQ responses for each basic bandwidth, and based on a negative response NACK within each basic bandwidth.
  • the ratio adjustment CWS solves the problem of adjusting the CWS in a broadband operation scenario and is conducive to improving the utilization efficiency of unlicensed frequency bands.
  • an embodiment of the present disclosure provides a CWS adjustment method 500 in unlicensed spectrum transmission for adjusting CWS in a broadband operation scenario.
  • the method may be performed by a network device and includes the following steps:
  • S502 Receive multiple HARQ responses, where the multiple HARQ responses include a first HARQ response and a second HARQ response.
  • the downlink channel corresponding to the first HARQ response occupies one basic bandwidth in the reference time unit; the downlink channel corresponding to the second HARQ response occupies multiple basic bandwidths in the reference time unit.
  • the multiple HARQ responses are feedbacks from the terminal device on the downlink channel sent by the network device within the reference time unit.
  • the above reference time unit may be a start time slot that the network device executes most recently and includes at least one downlink transmission time slot.
  • the HARQ response includes ACK, NACK, or DTX.
  • the network device may regard the HARQ response of the terminal device as a DTX state.
  • the network device may use DTX as a NACK for statistics.
  • the network device only counts DTX as one NACK, so as to avoid the problem of repeated statistics caused by the terminal device's subsequent successful feedback of the HARQ response for the downlink channel.
  • the network device may not perform statistics on DTX as a NACK. Whether DXT is counted as NACK may depend on the specific implementation scenario and specific implementation requirements of this embodiment, and is not limited here.
  • S504 For a terminal device that schedules multiple basic bandwidths, allocate a second HARQ response to one of the basic bandwidths.
  • the number of HARQ responses of a basic bandwidth, the number of first HARQ responses corresponding to the basic bandwidth, and the number of second HARQ responses allocated to the basic bandwidth are related.
  • This embodiment may also allocate the second HARQ response to one of the plurality of basic bandwidths based on the terminal device that feeds back the second HARQ response.
  • the first HARQ response received is allocated to the basic bandwidth; in special cases, there may be no terminal device that schedules a basic bandwidth, That is, the network device schedules multiple basic bandwidths for the terminal device within a reference time unit.
  • the received second HARQ response is allocated to one of the multiple basic bandwidths.
  • terminal A, terminal B, and terminal C all schedule multiple same basic bandwidths, and a second HARQ response of eight bits fed back by terminal A may be allocated to the first basic bandwidth shown in FIG. 3; terminal B The second HARQ response fed back is allocated to the first basic bandwidth shown in FIG. 3; the second HARQ response fed back to terminal C is allocated to the first basic bandwidth shown in FIG. 3, and so on.
  • step S504 the sum of the number of second HARQ responses allocated to one basic bandwidth and the number of first HARQ responses corresponding to the basic bandwidth may be used as the number of HARQ responses in one basic bandwidth.
  • the basic bandwidth allocated to its feedback HARQ response (that is, the second HARQ response) may be the highest frequency, the lowest frequency, or the highest frequency among the multiple basic bandwidths. Other than the highest frequency and the lowest frequency.
  • S506 Adjust the CWS corresponding to a basic bandwidth based on the ratio of NACK in a basic bandwidth.
  • the number of HARQ responses for each basic bandwidth can be determined through step S504. Since the HARQ response includes a NACK, this step can target each basic bandwidth:
  • the CWS corresponding to the basic bandwidth is set to the minimum value of the current priority level.
  • the above reference value may specifically be 50%, 80%, or the like.
  • adjusting the CWS corresponding to the basic bandwidth to the next higher allowable value of the current priority level and maintaining the increased value includes:
  • the ratio of the NACK in the basic bandwidth is equal to or greater than the reference value, and the CWS is less than the maximum CWS, adjust the CWS corresponding to the basic bandwidth to a higher allowable value under the current priority level and maintain the increased value; or
  • the CWS corresponding to the basic bandwidth is maintained as the maximum CWS.
  • step S506 may also be implemented in other manners, and some embodiments of the present disclosure are not limited thereto.
  • a network device when a network device receives multiple HARQ responses, it can determine the number of HARQ responses for each basic bandwidth, and based on a negative response NACK within each basic bandwidth.
  • the ratio adjustment CWS solves the problem of adjusting the CWS in a broadband operation scenario and is conducive to improving the utilization efficiency of unlicensed frequency bands.
  • an embodiment of the present disclosure provides a CWS adjustment method 600 in unlicensed spectrum transmission for adjusting CWS in a broadband operation scenario.
  • the method may be performed by a network device and includes the following steps:
  • S602 Receive multiple HARQ responses, and the downlink channels corresponding to the multiple HARQ responses occupy a basic bandwidth within a reference time unit.
  • the multiple HARQ responses are feedbacks from the terminal device on the downlink channel sent by the network device within the reference time unit.
  • the above reference time unit may be a start time slot that the network device executes most recently and includes at least one downlink transmission time slot.
  • the HARQ response includes ACK, NACK, or DTX.
  • the network device does not schedule any terminal device to span multiple basic bandwidths.
  • some embodiments of the present disclosure do not set how many basic bandwidths are scheduled by the network device. limited.
  • the network device may regard the HARQ response of the terminal device as a DTX state.
  • the network device may use DTX as a NACK for statistics.
  • the network device only counts DTX as one NACK, so as to avoid the problem of repeated statistics caused by the terminal device's subsequent successful feedback of the HARQ response for the downlink channel.
  • the network device may not perform statistics on DTX as a NACK. Whether DXT is counted as NACK may depend on the specific implementation scenario and specific implementation requirements of this embodiment, and is not limited here.
  • This step can be directed to the above-mentioned basic bandwidth. If the ratio of NACK in the basic bandwidth is equal to or greater than the reference value, adjust the CWS corresponding to the basic bandwidth to a higher allowable value under the current priority level and maintain the increased value, or
  • the CWS corresponding to the basic bandwidth is set to the minimum value of the current priority level.
  • the above reference value may specifically be 50%, 80%, or the like.
  • adjusting the CWS corresponding to the basic bandwidth to the next higher allowable value of the current priority level and maintaining the increased value includes:
  • the ratio of the NACK in the basic bandwidth is equal to or greater than the reference value, and the CWS is less than the maximum CWS, adjust the CWS corresponding to the basic bandwidth to a higher allowable value under the current priority level and maintain the increased value; or
  • the CWS corresponding to the basic bandwidth is maintained as the maximum CWS.
  • step S604 may also be implemented in other manners, and some embodiments of the present disclosure are not limited thereto.
  • a network device when a network device receives multiple HARQ responses, it can determine the number of HARQ responses for this basic bandwidth, and based on the ratio of negative response NACKs within the basic bandwidth Adjusting the CWS solves the problem of adjusting the CWS in a broadband operation scenario and is beneficial to improving the utilization efficiency of the unlicensed frequency band.
  • the CWS adjustment method in unlicensed spectrum transmission has been described in detail above with reference to FIGS. 1 to 6.
  • the network device according to some embodiments of the present disclosure will be described in detail below with reference to FIG. 7.
  • FIG. 7 is a schematic structural diagram of a network device according to some embodiments of the present disclosure. As shown in FIG. 7, the network device 700 includes:
  • the receiving module 702 may be configured to receive multiple HARQ responses, and the downlink channels corresponding to the multiple HARQ responses occupy one and / or multiple basic bandwidths within a reference time unit;
  • the number determining module 704 may be configured to determine the number of HARQ responses of a basic bandwidth.
  • the CWS adjustment module 706 may be configured to adjust a CWS corresponding to the one basic bandwidth based on a ratio of NACKs in the one basic bandwidth.
  • the foregoing network device When the foregoing network device provided by some embodiments of the present disclosure receives multiple HARQ responses, it can determine the number of HARQ responses for each basic bandwidth, and adjust the CWS based on the ratio of NACK in each basic bandwidth, solving the broadband operation scenario
  • the issue of adjusting CWS is conducive to improving the utilization efficiency of unlicensed frequency bands.
  • the multiple HARQ responses include a first HARQ response and a second HARQ response, where:
  • the downlink channel corresponding to the first HARQ response occupies one basic bandwidth in the reference time unit; the downlink channel corresponding to the second HARQ response occupies multiple basic bandwidths in the reference time unit.
  • the number of HARQ responses of a basic bandwidth, the number of the first HARQ responses corresponding to the basic bandwidth, and the number of the second HARQ responses plus a preset weight are related.
  • the preset weight is an inverse of the number of the plurality of basic bandwidths.
  • the number of HARQ responses of a basic bandwidth, and the number of the first HARQ responses corresponding to the basic bandwidth are related to the sum of the number of the second HARQ responses.
  • the number of HARQ responses of a basic bandwidth, the number of the first HARQ responses corresponding to the basic bandwidth, and the number of the second HARQ responses allocated to the basic bandwidth are related.
  • the quantity determining module 704 may be further configured to allocate the second HARQ response to one of the plurality of basic bandwidths based on the terminal device that feeds back the second HARQ response. in.
  • the allocated basic bandwidth is the highest frequency, the lowest frequency, or the highest frequency and the lowest frequency among the plurality of basic bandwidths.
  • the downlink channel occupies a basic bandwidth in a reference time unit, and in the reference time unit, the network device does not schedule any one terminal device to span multiple basic bandwidths.
  • the CWS adjustment module 706 may be configured to:
  • the CWS corresponding to the basic bandwidth is set to the minimum value of the current priority level.
  • the CWS adjustment module 706 may be configured to:
  • the ratio of NACK in the basic bandwidth is equal to or greater than the reference value, and the CWS corresponding to the basic bandwidth is less than the maximum CWS, adjust the CWS corresponding to the basic bandwidth to the next higher allowable value and maintain the increased value; or
  • the CWS corresponding to the basic bandwidth is maintained as the maximum CWS.
  • the network device 700 may refer to each process of the method 100 to the method 600 corresponding to some embodiments of the present disclosure, and each unit / module in the network device 700 and the other operations and / or functions described above In order to implement the corresponding processes in the method 100 to the method 600, respectively, for the sake of brevity, the details will not be repeated here.
  • FIG. 8 is a structural diagram of a network device applied by some embodiments of the present disclosure, which can implement the details of method embodiment 100 to method embodiment 600 and achieve the same effect.
  • the network device 800 includes: a processor 801, a transceiver 802, a memory 803, and a bus interface, where:
  • the network device 800 further includes: a computer program stored on the memory 803 and executable on the processor 801, and the computer program is executed by the processor 801 and the method embodiment 100 to the method embodiment 600 steps.
  • the bus architecture may include any number of interconnected buses and bridges, and one or more processors specifically represented by the processor 801 and various circuits of the memory represented by the memory 803 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, so they are not described further herein.
  • the bus interface provides an interface.
  • the transceiver 802 may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium.
  • the processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 may store data used by the processor 801 when performing operations.
  • Some embodiments of the present disclosure further provide a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program, and the computer program implements each process of the foregoing method embodiment 100 to method embodiment 600 when executed by a processor. And can achieve the same technical effect, in order to avoid repetition, will not repeat them here.
  • the computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Certains modes de réalisation de la présente invention concernent un procédé d'ajustement de taille de fenêtre de conflit (CWS) et un dispositif de réseau aux fins de transmission dans un spectre sans licence. Le procédé comprend : la réception d'une pluralité de réponses de HARQ, un canal de liaison descendante correspondant à la pluralité des réponses de HARQ occupant une ou plusieurs largeurs de bande de base dans une unité de temps de référence ; la détermination du nombre de réponses de HARQ dans une largeur de bande de base ; et l'ajustement, sur la base du rapport de NACK dans ladite largeur de bande de base, d'une CWS correspondant à ladite largeur de bande de base.
PCT/CN2019/100534 2018-09-25 2019-08-14 Procédé d'ajustement de taille de fenêtre de conflit et dispositif de réseau WO2020063167A1 (fr)

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