WO2020057259A1 - Procédé et dispositif pour ajuster une taille de fenêtre de contention - Google Patents

Procédé et dispositif pour ajuster une taille de fenêtre de contention Download PDF

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Publication number
WO2020057259A1
WO2020057259A1 PCT/CN2019/097873 CN2019097873W WO2020057259A1 WO 2020057259 A1 WO2020057259 A1 WO 2020057259A1 CN 2019097873 W CN2019097873 W CN 2019097873W WO 2020057259 A1 WO2020057259 A1 WO 2020057259A1
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WIPO (PCT)
Prior art keywords
time slot
cws
pdsch
response information
value
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PCT/CN2019/097873
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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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Publication of WO2020057259A1 publication Critical patent/WO2020057259A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • 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
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present disclosure relates to the field of communications, and in particular, to a method and device for adjusting the contention window size.
  • 5G fifth generation
  • the main scenarios of 5G include Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mMTC), and High-Reliable Low-Latency Communications (URLLC). These scenarios require high reliability, low latency, large bandwidth, and wide coverage of the system.
  • eMBB Enhanced Mobile Broadband
  • mMTC Massive Machine Type Communication
  • URLLC High-Reliable Low-Latency Communications
  • a network-side device After a user-side equipment (UE) receives a physical downlink shared channel (PDSCH) sent by a network-side device, the time for sending response information to the network-side device is not constant. It is also a fixed time, which can be adjusted according to demand to achieve flexible feedback of response information.
  • a network-side device is allowed to send multiple PDSCHs to a UE in the same time slot.
  • the previous method for adjusting the contention window (Contention Window Size, CWS) of the contention window (CW) is no longer applicable. Therefore, it is urgent to provide a CWS adjustment method suitable for unlicensed spectrum scenarios. .
  • the purpose of the embodiments of the present disclosure is to provide a method and device for adjusting the contention window size CWS to adjust the contention window size CWS in an unlicensed spectrum scenario, thereby improving the utilization efficiency of an unlicensed frequency band.
  • an embodiment of the present disclosure provides a method for adjusting a contention window size CWS, which is applied to a network-side device, including:
  • an embodiment of the present disclosure provides a network-side device, including:
  • a time slot determining unit configured to determine a reference time slot, where the reference time slot is used to adjust the contention window size CWS of the contention window CW before the reference time slot is heard before the LBT moment;
  • An information obtaining unit configured to obtain response information of a physical downlink shared channel PDSCH in the reference time slot
  • a parameter adjustment unit configured to adjust the CWS according to the response information.
  • an embodiment of the present disclosure provides a network-side device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is processed by the processor.
  • the processor executes, the steps of the method according to the first aspect are implemented.
  • an embodiment of the present disclosure provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to the first aspect is implemented. A step of.
  • the method and device for adjusting the CWS of the contention window size provided by the embodiments of the present disclosure, it is possible to determine a reference slot located before the LBT moment, obtain PDSCH response information in the reference slot, and adjust the CWS based on the response information, so In the unlicensed spectrum scenario, the CWS is adjusted to improve the utilization efficiency of the unlicensed frequency band.
  • FIG. 1 is a schematic diagram of a CWS adjustment method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of obtaining response information of a PDSCH in a reference slot according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of acquiring response information of a PDSCH in a reference slot according to another embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided by an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a module composition of a network-side device according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a network-side device according to an embodiment of the present disclosure.
  • the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as: Global System (Mobile), Global Communications (GSM), Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access Address (Wideband Code Division Multiple Access, WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A), New Air Interface (New Radio, NR) and so on.
  • GSM Global System
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access Address
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Enhanced Long Term Evolution
  • New Air Interface New Radio, NR
  • User-side equipment which can also be called user terminal, mobile terminal (mobile terminal), mobile user equipment, etc., can communicate with one or more core networks via a radio access network (e.g., Radio Access Network, RAN),
  • the user-side device may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • RAN Radio Access Network
  • the user-side device may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • Radio access networks exchange languages and / or data.
  • Network-side equipment used to communicate with user-side equipment, can be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolutionary base station in LTE (Evolutional NodeB, eNB or e-NodeB) and 5G base station (gNB), the embodiments of the present disclosure are not limited, but for the convenience of description, the following embodiments take gNB as an example for illustration.
  • BTS Base Transceiver Station
  • NodeB base station
  • gNB 5G base station
  • the embodiments of the present disclosure provide a CWS adjustment method and device to adjust the CWS in the unlicensed spectrum scenario and improve the utilization efficiency of the unlicensed frequency band.
  • NACK Non-acknowledgement
  • FIG. 1 is a schematic diagram of a CWS adjustment method according to an embodiment of the present disclosure.
  • the method may be applied to a network-side device and executed by the network-side device. As shown in Figure 1, the method includes the following steps:
  • Step 102 Determine a reference time slot, where the reference time slot is before the LBT time, and the reference time slot is used to adjust the CWS of the CW;
  • Step 104 Obtain response information of the PDSCH in the reference slot.
  • Step 106 Adjust the CWS according to the response information.
  • a reference slot located before the LBT moment can be determined, and the PDSCH response information in the reference slot can be obtained, and the CWS can be adjusted according to the response information, so that the unlicensed spectrum scenario is based on the reference slot method Adjust CWS to improve the utilization efficiency of unlicensed frequency bands.
  • determining the reference time slot may be:
  • a time slot used for transmitting the PDSCH first is used as a reference time slot.
  • a downlink transmission before the LBT time and closest to the LBT time is determined, and at least one time slot occupied by the latest downlink transmission is determined.
  • the "nearest" in the “last downlink transmission” can be understood as the meaning of the shortest time from the LBT moment.
  • a slot in which the PDSCH is transmitted first among the at least one slot is used as a reference slot.
  • “first” refers to the first in chronological order.
  • the reference time slot is determined in at least one time slot occupied by a downlink transmission closest to the LBT time and closest to the LBT time, the reference time slot is located before the LBT time.
  • determining the reference time slot may be:
  • the k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the PDSCH response information in the third time slot.
  • the response information of the PDSCH is sent from the user-side device to the network-side device.
  • a first time slot for transmitting PDSCH response information before the LBT time and closest to the LBT time is determined, and the PDSCH response information sent by the user-side device to the network-side device in the first time slot is obtained.
  • the corresponding target response information with the smallest k1 value is determined, where the k1 value refers to a time slot between a third time slot for transmitting the PDSCH and a fourth time slot for transmitting the response information of the PDSCH. Quantity.
  • a target PDSCH corresponding to the target response information is determined, and a second time slot for transmitting the target PDSCH is used as a reference time slot.
  • the target response information is sent through the first time slot, and the reference time slot is the time slot of the target PDSCH corresponding to the transmission target response information, so the reference time slot is located before the first time slot. , Which is before the LBT moment.
  • the PDSCH response information in the reference time slot is obtained, and the CWS is adjusted according to the response information.
  • the PDSCH in the reference time slot refers to the PDSCH that the network-side device sends to the user-side device in the reference time slot, and the PDSCH response information refers to the user-side device's response information to the PDSCH.
  • obtaining response information of the PDSCH in the reference time slot may be: obtaining response information of the user-side device to all or part of the PDSCH received.
  • the network-side device sends at least one PDSCH to a user-side device, and then obtaining the response information of the user-side device to all or part of the received PDSCH may be: obtaining the response information of the user-side device to all the received PDSCH. Or, obtaining the response information of the user-side device to the received PDSCH.
  • the network-side device sends at least one PDSCH to multiple user-side devices, and then obtaining the response information of all or part of the PDSCH received by the user-side device may be: obtaining all the received pairs of each user-side device. PDSCH response information, or obtaining response information of each user-side device to part of the PDSCH received, or obtaining response information of some user-side devices to all received PDSCH, and obtaining the remaining part of the user-side device to received PDSCH response information.
  • acquiring the response information of the user equipment to the received partial PDSCH may be: acquiring the response information of the user side equipment to the PDSCH with the lowest start symbol index among the multiple received PDSCHs.
  • the PDSCH with the lowest start symbol index is the PDSCH received first by the user-side device.
  • FIG. 2 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided by an embodiment of the present disclosure.
  • a network-side device sends one PDSCH to UE1 and three PDSCHs to UE2. .
  • the response information of UE1 to the received PDSCH may be obtained, and the response information of UE2 to the three PDSCHs received may be obtained.
  • Information to regulate CWS may be provided.
  • FIG. 3 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided by another embodiment of the present disclosure.
  • a network-side device sends two PDSCHs to UE1, and sends three PDSCHs to UE2.
  • PDSCH PDSCH.
  • the response information of UE1 to the first PDSCH received may be obtained, and the response information of UE2 to the first PDSCH received may be obtained.
  • Adjust CWS According to the obtained two response information.
  • the network-side device in the reference time slot transmits at least one PDSCH to multiple UEs.
  • the reference time slot may be obtained due to timing feedback of the response information.
  • the response information of some UEs in the UE cannot obtain the response information of other UEs in the reference time slot.
  • the CWS is adjusted based on the acquired response information, and the unobtained response information is ignored.
  • FIG. 4 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided in an embodiment of the present disclosure.
  • a network-side device sends a PDSCH to UE1 and a PDSCH to UE2.
  • the CWS is adjusted according to the response information of the PDSCH for the PDSCH and the UE1 is ignored Response information for PDSCH.
  • adjusting the CWS according to the acquired response information may be as follows: In the response information, the number of the proportion of the NACK information is counted, and the CWS is adjusted according to the amount of the proportion.
  • the PDSCH response information may be ACK information or NACK information.
  • the number of NACK information is counted in the response information, and the CWS is adjusted according to the number of the proportion.
  • Table 1 shows a schematic view of the values allowed by the CWS. As shown in Table 1, when the access priority P of the currently used channel is 1, the allowed values of the CWS are 3 and 7, and the currently used channel When the access priority level P is 2, the allowed values of CWS are 7 and 15, and so on. It can be understood that the allowed values of the CWS shown in Table 1 are only used as a schematic description, and do not indicate specific restrictions.
  • the CWS When adjusting the CWS according to the amount of NACK information, in one case, if the amount of NACK information in the response message is greater than or equal to a preset ratio threshold, and the current value of CWS is not the value of the currently used channel
  • the maximum value allowed for the access priority level will adjust the value of CWS to the next higher value allowed for the access priority level of the currently used channel. For example, in Table 1, the access priority of the currently used channel is level 1 and the current value of CWS is 3. If the number of NACK information in the response information in the reference slot is greater than or equal to a preset ratio threshold For example, 80%, you can adjust the value of CWS to 7.
  • the CWS is maintained.
  • the value does not change.
  • the access priority of the currently used channel is level 1 and the current value of CWS is 7. If the number of NACK information in the response information in the reference slot is greater than or equal to the preset ratio threshold If, for example, 80%, the value of CWS remains unchanged.
  • the ratio of the number of NACK messages in the response message is less than the preset ratio threshold, and the current value of CWS is not the minimum allowed by the access priority of the currently used channel, then The current value of CWS is adjusted to the minimum value allowed by the access priority level of the currently used channel.
  • the access priority of the currently used channel is level 1 and the current value of CWS is 7. If the number of NACK information in the response information in the reference slot is less than the preset ratio threshold, For example, 80%, you can adjust the value of CWS to 3.
  • the CWS is maintained The value does not change.
  • the access priority of the currently used channel is level 1 and the current value of CWS is 3.
  • the network-side device may treat the UE's PDSCH response information as the DTX state. In the case where the network-side device does not receive the UE response information for the PDSCH, the network-side device may use DXT as NACK information for statistics. It should be noted that, for one PDSCH, the network-side device only counts DXT as one NACK information, so as to avoid repeated statistical problems caused by the UE after successfully responding to the PDSCH with response information.
  • the network-side device may not perform statistics on the DXT as NACK information. Whether to count DXT as NACK information may depend on the specific implementation scenario and specific implementation requirements of this embodiment, and is not limited here.
  • a reference time slot can be determined, and the CWS can be adjusted according to the PDSCH response information in the reference time slot, so that in an unlicensed spectrum scenario, the CWS is adjusted according to the interference situation or channel situation of the UE. Conducive to improving the utilization efficiency of unlicensed frequency bands.
  • FIG. 5 is a schematic diagram of a module composition of a network-side device according to an embodiment of the present disclosure.
  • the network-side device include:
  • a time slot determining unit 51 configured to determine a reference time slot, which is used to adjust the contention window size CWS of the contention window CW before the reference time slot is used to listen to the LBT moment before the session;
  • An information acquiring unit 52 configured to acquire response information of a physical downlink shared channel PDSCH in the reference time slot;
  • a parameter adjusting unit 53 is configured to adjust the CWS according to the response information.
  • the time slot determining unit 51 is specifically configured to:
  • a time slot used for transmitting the PDSCH first is used as the reference time slot.
  • the time slot determining unit 51 is specifically configured to:
  • the k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the first time slot.
  • the network-side device transmits at least one PDSCH to the user-side device in the reference slot;
  • the information acquisition unit 52 is specifically configured to:
  • the information obtaining unit 52 is further specifically configured to:
  • the parameter adjustment unit 53 is specifically configured to:
  • the proportion of the number of non-acknowledgment NACK information is counted
  • parameter adjustment unit 53 is further specifically used for one of the following:
  • the value of the CWS is maintained unchanged
  • the value of the CWS is adjusted to the next allowed higher priority of the access priority of the currently used channel. High value
  • the current value of the CWS is adjusted to the minimum value.
  • a reference time slot located before the LBT moment can be determined, and PDSCH response information in the reference time slot can be obtained, and the CWS can be adjusted according to the response information, thereby adjusting in the unlicensed spectrum scenario based on the reference time slot mode. CWS to improve the utilization efficiency of unlicensed bands.
  • the network-side device provided by the embodiment of the present disclosure can implement the processes implemented by the network-side device in the foregoing method embodiments, and implement the functions of the network-side device in the foregoing method embodiments, and achieve the same effect, which are not described herein again.
  • FIG. 6 is a schematic structural diagram of a network-side device according to an embodiment of the present disclosure.
  • the network-side device 1200 It includes a processor 1201, a transceiver 1202, a memory 1203, a user interface 1204, and a bus interface.
  • the network-side device 1200 further includes a computer program stored in the memory 1203 and executable on the processor 1201.
  • the computer program is executed by the processor 1201, the following steps are implemented:
  • the bus architecture may include any number of interconnected buses and bridges, and one or more processors specifically represented by the processor 1201 and various circuits of the memory represented by the memory 1203 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and therefore, this embodiment will not be described further.
  • the bus interface provides an interface.
  • the transceiver 1202 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium.
  • the user interface 1204 may also be an interface that can be externally connected to the required device.
  • the connected devices include, but are not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1201 is responsible for managing the bus architecture and general processing, and the memory 1203 may store data used by the processor 1201 when performing operations.
  • the determining a reference time slot includes:
  • a time slot used for transmitting the PDSCH first is used as the reference time slot.
  • the determining a reference time slot includes:
  • the k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the first time slot.
  • the network-side device in the reference time slot transmits at least one of the PDSCH to the user-side device; and acquiring the physical downlink share in the reference time slot
  • the channel PDSCH response information includes:
  • acquiring the response information of the user equipment to the PDSCH received in part includes:
  • the adjusting the CWS according to the response information includes:
  • the proportion of the number of non-acknowledgment NACK information is counted
  • the adjusting the CWS according to the proportion of the quantity includes one of the following:
  • the value of the CWS is maintained unchanged
  • the value of the CWS is adjusted to the next allowed higher priority of the access priority of the currently used channel. High value
  • the current value of the CWS is adjusted to the minimum value.
  • a reference time slot located before the LBT moment can be determined, and PDSCH response information in the reference time slot can be obtained, and the CWS can be adjusted according to the response information, thereby adjusting in the unlicensed spectrum scenario based on the reference time slot mode. CWS to improve the utilization efficiency of unlicensed bands.
  • the network-side device 1200 provided in the embodiment of the present disclosure can implement the processes implemented by the network-side device in the foregoing method embodiments, and implement the functions of the network-side device in the foregoing method embodiments, and achieve the same effect, which is not described again .
  • An embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored.
  • the computer-readable storage medium such as a read-only memory (Read Only Memory, ROM), a random storage Access memory (Random Access Memory, RAM), magnetic disks or optical discs.
  • the determining a reference time slot includes:
  • a time slot used for transmitting the PDSCH first is used as the reference time slot.
  • the determining a reference time slot includes:
  • the k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the first time slot.
  • the network-side device in the reference time slot transmits at least one PDSCH to the user-side device; and the response for acquiring the PDSCH of the physical downlink shared channel in the reference time slot is obtained.
  • Information including:
  • obtaining the response information of the user equipment to the received PDSCH includes:
  • adjusting the CWS according to the response information includes:
  • the proportion of the number of non-acknowledgment NACK information is counted
  • the adjusting the CWS according to the quantity proportion includes one of the following:
  • the value of the CWS is maintained unchanged
  • the value of the CWS is adjusted to the next allowed higher priority of the access priority of the currently used channel. High value
  • the current value of the CWS is adjusted to the minimum value.
  • a reference time slot located before the LBT moment can be determined, and PDSCH response information in the reference time slot can be obtained, and the CWS can be adjusted according to the response information, thereby adjusting in the unlicensed spectrum scenario based on the reference time slot mode. CWS to improve the utilization efficiency of unlicensed bands.
  • each process of the embodiment of the method for adjusting the competition window size CWS in the method embodiment can achieve the same technical effect, and to avoid repetition, here is not More details.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the technical solutions of the embodiments of the present disclosure.
  • each functional unit in each of the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the embodiments of the present disclosure is essentially a part that contributes to the existing technology or a part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium.
  • Including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present disclosure.
  • the aforementioned storage media include: U disks, mobile hard disks, ROMs, RAMs, magnetic disks, or compact discs, which can store program codes.

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Abstract

Les modes de réalisation de la présente invention concernent un procédé et un dispositif d'ajustement d'une taille de fenêtre de contention (CWS). Le procédé d'ajustement d'une CWS consiste à : déterminer un intervalle de temps de référence, qui est antérieur à un instant d'exécution d'une procédure Écouter avant de parler (LBT) et qui est utilisé pour ajuster la CWS d'une CW ; acquérir des informations de réponse d'un canal physique partagé de liaison descendante (PDSCH) dans l'intervalle de temps de référence ; et ajuster la CWS d'après les informations de réponse.
PCT/CN2019/097873 2018-09-19 2019-07-26 Procédé et dispositif pour ajuster une taille de fenêtre de contention WO2020057259A1 (fr)

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CN201811095164.1A CN110933765B (zh) 2018-09-19 2018-09-19 竞争窗大小cws调节方法和设备
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CN113677037A (zh) * 2020-05-15 2021-11-19 华为技术有限公司 一种采用竞争窗的信道接入方法及装置
CN114765899A (zh) * 2021-01-15 2022-07-19 展讯通信（上海）有限公司 辅链路的cws确定方法及装置、计算机可读存储介质
WO2024045136A1 (fr) * 2022-09-01 2024-03-07 深圳传音控股股份有限公司 Procédé de traitement, dispositif de communication et support de stockage

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