WO2021056475A1 - Procédé et appareil de réglage de taille de fenêtre de contention, dispositif de communication et support de stockage - Google Patents

Procédé et appareil de réglage de taille de fenêtre de contention, dispositif de communication et support de stockage Download PDF

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Publication number
WO2021056475A1
WO2021056475A1 PCT/CN2019/108745 CN2019108745W WO2021056475A1 WO 2021056475 A1 WO2021056475 A1 WO 2021056475A1 CN 2019108745 W CN2019108745 W CN 2019108745W WO 2021056475 A1 WO2021056475 A1 WO 2021056475A1
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Prior art keywords
downlink control
cws
triggered
control command
pusch
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PCT/CN2019/108745
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English (en)
Chinese (zh)
Inventor
朱亚军
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小米通讯技术有限公司
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Priority to PCT/CN2019/108745 priority Critical patent/WO2021056475A1/fr
Priority to CN201980002111.7A priority patent/CN110800360B/zh
Publication of WO2021056475A1 publication Critical patent/WO2021056475A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Definitions

  • This application relates to the field of wireless communication technology but is not limited to the field of wireless communication technology, and in particular to a method and device for adjusting the length of a contention window, communication equipment and storage medium.
  • the current cellular mobile communication technology is in the evolution stage of a new generation of technology.
  • An important feature of the new generation of technology is to support flexible configuration of multiple business types.
  • eMBB Enhanced Mobile Broadband
  • ultra-high reliability and ultra-low latency communication Ultra Reliable & Low Latency Communication (URLLC) service types mainly require high reliability and low latency
  • massive-scale Internet of Things massive Machine Type of Communication, mMTC
  • mMTC massive Machine Type of Communication
  • the embodiment of the present application provides a method and device for adjusting the length of a competition window, a communication device, and a storage medium.
  • the first aspect of the embodiments of the present application provides a contention window size (Contention Window Size, CWS) determination method, which is applied to a base station, and the method includes:
  • the CWS When there is a downlink control command on the unlicensed spectrum, the CWS is adjusted according to the behavior execution status triggered by the downlink control command.
  • a second aspect of the embodiments of the present application provides a device for adjusting the length of a contention window, which is applied to a base station, and the device includes:
  • the adjustment module is configured to, when there is a downlink control command on the unlicensed spectrum, adjust the CWS according to the behavior execution status triggered by the downlink control command.
  • a third aspect of the embodiments of the present application provides a communication device, which includes:
  • the processor is respectively connected to the transceiver and the memory, and is used to control the wireless signal transmission and reception of the transceiver by executing computer executable instructions stored on the memory, and implement any one of the technologies in the first aspect of the claim
  • the competition window length adjustment method provided by the plan.
  • the fourth aspect of the embodiments of the present application provides a computer storage medium that stores computer-executable instructions. After the computer-executable instructions are executed by a processor, the competition provided by any of the technical solutions of the first aspect can be realized. Window length adjustment method.
  • the CWS when there is a downlink control command on the unlicensed spectrum, the CWS will be adjusted adaptively according to the behavior execution status triggered by the downlink control command.
  • CWS limits the maximum value of random backoff during channel listening, and whether data is transmitted on PUCCH and/or PUSCH directly determines the current unlicensed spectrum occupancy status, which is based on whether the downlink control command triggers the behavior
  • the execution status reflects whether the downlink control command needs to be re-sent, can determine the CWS that is more suitable for the current unlicensed spectrum occupancy, and reduce the conflict between the access nodes of the channel contained in the unlicensed spectrum caused by the too small CWS Intensified, it also reduces the phenomenon of low channel access efficiency caused by excessive CWS.
  • the technical solution provided by the embodiments of the present application has reasonable CWS settings. On the one hand, it can effectively reduce the intensity of channels on the unlicensed spectrum. On the other hand, it can reduce the low channel access efficiency caused by excessive CWS, and can realize unlicensed Fair competition of channels on the spectrum.
  • Fig. 1 is a schematic structural diagram showing a wireless communication system according to an exemplary embodiment
  • Fig. 2 is a schematic flowchart showing a method for adjusting the length of a competition window according to an exemplary embodiment
  • Fig. 3A is a schematic flowchart of a method for adjusting the length of a competition window according to an exemplary embodiment
  • Fig. 3B is a schematic flowchart showing a method for adjusting the length of a competition window according to an exemplary embodiment
  • Fig. 4 is a schematic diagram of channel sensing based on time slots according to an exemplary embodiment
  • Fig. 5 is a schematic flowchart showing a method for adjusting the length of a competition window according to an exemplary embodiment
  • Fig. 6 is a schematic structural diagram showing a device for adjusting the length of a competition window according to an exemplary embodiment
  • Fig. 7 is a schematic structural diagram of a terminal according to an exemplary embodiment
  • Fig. 8 is a schematic structural diagram of a base station according to an exemplary embodiment.
  • first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • first information may also be referred to as second information, and similarly, the second information may also be referred to as first information.
  • word “if” as used herein can be interpreted as "when” or "when” or "in response to determination”.
  • FIG. 1 shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure.
  • the wireless communication system is a communication system based on cellular mobile communication technology.
  • the wireless communication system may include several terminals 11 and several base stations 12.
  • the terminal 11 may be a device that provides voice and/or data connectivity to the user.
  • the terminal 11 can communicate with one or more core networks via a radio access network (RAN).
  • RAN radio access network
  • the terminal 11 can be an Internet of Things terminal, such as a sensor device, a mobile phone (or “cellular” phone), and
  • the computer of the Internet of Things terminal for example, may be a fixed, portable, pocket-sized, handheld, built-in computer or vehicle-mounted device.
  • station For example, station (Station, STA), subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote station (remote station), access point, remote terminal ( remote terminal), access terminal (access terminal), user device (user terminal), user agent (user agent), user equipment (user device), or user terminal (user equipment, UE).
  • the terminal 11 may also be a device of an unmanned aerial vehicle.
  • the terminal 11 may also be an in-vehicle device, for example, it may be a trip computer with a wireless communication function, or a wireless communication device connected to the trip computer.
  • the terminal 11 may also be a roadside device, for example, it may be a street lamp, signal lamp, or other roadside device with a wireless communication function.
  • the base station 12 may be a network side device in a wireless communication system.
  • the wireless communication system may be a 5G system, also known as a new radio (NR) system or a 5G NR system.
  • the wireless communication system may be a system that supports New Radio-Unlicense (NR-U).
  • the wireless communication system may also be the next-generation system of the 5G system.
  • the access network in the 5G system can be called NG-RAN (New Generation-Radio Access Network). .
  • the base station 12 may be a base station (gNB) adopting a centralized and distributed architecture in the 5G system.
  • the base station 12 usually includes a centralized unit (CU) and at least two distributed units (DU).
  • the centralized unit is provided with a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, a radio link layer control protocol (Radio Link Control, RLC) layer, and a media access control (Media Access Control, MAC) layer protocol stack; distribution
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC media access control
  • the unit is provided with a physical (Physical, PHY) layer protocol stack, and the embodiment of the present disclosure does not limit the specific implementation manner of the base station 12.
  • a wireless connection can be established between the base station 12 and the terminal 11 through a wireless air interface.
  • the wireless air interface is a wireless air interface based on the fifth-generation mobile communication network technology (5G) standard.
  • the wireless air interface is a new air interface; or, the wireless air interface can also be a next-generation mobile based on 5G.
  • the wireless air interface of the communication network technology standard is a wireless air interface based on the fifth-generation mobile communication network technology standard.
  • an E2E (End to End) connection can also be established between the terminals 11.
  • the above-mentioned wireless communication system may further include a network management device 13.
  • the network management device 13 may be a core network device in a wireless communication system.
  • the network management device 13 may be a mobility management entity (Mobility Management Entity) in an Evolved Packet Core (EPC) network. MME).
  • the network management device may also be other core network devices, such as Serving GateWay (SGW), Public Data Network GateWay (PGW), Policy and Charging Rules function unit (Policy and Charging Rules). Function, PCRF) or Home Subscriber Server (HSS), etc.
  • SGW Serving GateWay
  • PGW Public Data Network GateWay
  • Policy and Charging Rules function unit Policy and Charging Rules
  • Function PCRF
  • HSS Home Subscriber Server
  • the execution subject involved in the embodiments of the present disclosure includes, but is not limited to: communication equipment supporting NR-U, where user equipment includes, but is not limited to: user terminals, mobile terminals, in-vehicle communication equipment, roadside infrastructure devices, smart wearable devices, Tablet computers, user nodes, base stations, etc.
  • the unlicensed frequency band is used for the unlicensed frequency spectrum assisted access (license assisted access, LAA) mechanism. That is to say, the use of unlicensed frequency bands is assisted by licensed frequency bands.
  • LAA licensed assisted access
  • the LAA also introduces a mechanism for channel detection before data transmission. The sender needs to check whether the channel is idle when there is data to be sent, only the channel After being in the idle state, the sender can send data.
  • the channel detection mechanism of cat4 is based on clear channel assessment (CCA) based on random backoff.
  • CCA clear channel assessment
  • the access node uniformly randomly generates a backoff counter N from 0 to the length of the contention window, and listens with the CCA slot as the granularity. If the channel is detected to be idle in the listening slot, it will return Decrease the back-off counter by one, otherwise, the back-off counter will be suspended if the channel is busy, that is, the back-off counter N remains unchanged during the busy time of the channel until the channel is detected to be idle; when the back-off counter is reduced to 0, access The node can immediately occupy the channel.
  • the CWS of Cat.4 is a dynamically adjusted value.
  • the access node dynamically adjusts the CWS according to whether the previous transmission is correctly received by the receiving node. In this way, an appropriate CWS value can be obtained according to the channel state and network traffic load adjustment, and a compromise can be achieved between reducing collisions between sending nodes and improving channel access efficiency.
  • the second PDSCH transmission use this increased CWS to generate a random number N and perform channel listening.
  • the specific process of CWS adjustment may include:
  • CW p is the value of the contention window length of the business priority p;
  • CW p,min is the minimum value of the contention window length of the business priority p.
  • Step 2 For any one-time listening before communication (Listen Before Talk, LBT), if the base station receives all the mixtures of data transmitted on all the physical downlink shared channels (Physical Downlink Shared Channel, PDSCH) contained in the reference subframe k
  • HARQ-ACK Hybrid Automatic Repeat reQuest acknowledgement character
  • NACK non-acknowledgement character
  • step 1 If (the number of HARQ-ACKs for NACKs does not exceed 80%), go to step 1, and after step 1, reduce the CW p corresponding to each service priority p ⁇ ⁇ 1,2,3,4 ⁇ to The minimum value of CWS in the CWS table corresponding to the business priority.
  • the reference subframe k is the first subframe in a downlink transmission closest to the current moment sent by the base station on the current carrier, and the base station can expect to receive HARQ-ACK feedback on this subframe.
  • CW p has already taken the maximum value CW max,p in the set
  • the next higher value of the adjusted CWS is still CW max,p .
  • k is selected by the base station from ⁇ 1,2,...,8 ⁇ , and the value of k can be independently selected for each service priority p ⁇ ⁇ 1,2,3,4 ⁇ .
  • CW max,p is the maximum length of the contention window of business priority p.
  • the new generation communication system supports a flexible system frame structure, so there may be no PDSCH transmission on the reference resource, which makes it impossible to adjust the CWS according to the PDSCH transmission in the new generation communication system; therefore, the base station is in the new On the unlicensed spectrum on the first-generation communication system, the adjustment of CWS is chaotic. In most cases, it is impossible to select a suitable CWS for the base station to detect channels on the unlicensed spectrum.
  • this embodiment provides a method, which is applied to a base station, and the method includes:
  • the base station may be a base station of various generations of cellular communication, for example, a base station from 2G to 5G, or a base station after 5G.
  • the downlink control instruction is a control instruction issued by the base station for triggering various terminal behaviors.
  • the downlink control instruction may include: a control instruction for instructing the terminal to perform uplink transmission, and/or a control instruction for the terminal to change its own behavior.
  • the execution status of the behavior triggered by the downlink control instruction can reflect whether the base station needs to reoccupy the channel of the unlicensed spectrum to issue the same downlink control instruction, so it reflects the urgency of the base station to access the channel on the unlicensed spectrum, so the behavior is executed
  • the condition can be used to adjust the CWS.
  • S110 when the downlink control command on the unlicensed spectrum is used to trigger the uplink transmission, S110 may include:
  • S111 Adjust the CWS according to whether data transmission on the PUSCH and/or PUCCH triggered by the downlink control command is detected.
  • the method provided in the embodiments of the present application can be applied to the hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) feedback without physical downlink shared channel (PDSCH) data on the reference resources of the unlicensed spectrum Under the application scenario.
  • HARQ hybrid Automatic Repeat reQuest
  • PDSCH physical downlink shared channel
  • the method provided by the implementation of this application can also be applied in an application scenario that includes HARQ feedback of PDSCH data.
  • the downlink control command that triggers the uplink transmission is issued by the base station and is used to trigger the terminal to perform the uplink transmission control command.
  • the downlink control instruction can schedule uplink transmission of unlicensed spectrum, and the uplink transmission includes but is not limited to PUSCH transmission and PUCCH transmission.
  • the base station will detect the data transmission on PUSCH and/or PUCCH, for example, detect PUCCH and/or PUSCH, if there is data transmission and no data transmission on PUSCH and/or PUCCH, the signal strength detected by the base station is different Yes, it can be determined whether the data transmission on PUSCH and/or PUCCH is detected based on the comparison between the signal strength of the wireless signal detected on the PUSCH and/or PUCCH and the strength threshold.
  • the base station After adjusting the CWS, the base station will listen to the channel on the unlicensed spectrum based on the adjusted CWS and perform channel access for downlink transmission.
  • a count value N of the fallback counter can be uniformly and randomly generated from 0 to Contention Window Size (CWS, Contention Window Size), where N is between 0 and CWS.
  • CWS Contention Window Size
  • the count value of the counter is reduced by 1.
  • the count value of the counter does not change.
  • the count value of the counter is 0, the channel of the unlicensed frequency band is immediately occupied .
  • the CWS is set too small, the channel on the unlicensed spectrum will be accessed faster. If the CWS is set too large, it will cause low channel access efficiency and further cause the problem of large data transmission delay.
  • the sending end when the sending end sends data to the receiving end for the first time, the CWS used to detect the channel is 15, and the counter value is 7, then after the CCA detects that the channel of the unlicensed band is free, 4 times CCA detects that the channel of the unlicensed frequency band is busy, and then CCA detects that the channel of the unlicensed frequency band is idle 5 times, so that a total of 7 times CCA detects that the channel of the unlicensed frequency band is idle, the counter value is reduced to 0, and the channel of the unlicensed frequency band is occupied to receive Send data at the end.
  • the sending end can adjust the CWS while occupying the channel of the unlicensed frequency band.
  • the CCA detection is not limited to the unit of time slot, but can also be performed in unit of subframe or symbol.
  • the method further includes:
  • S120 Send the adjusted window information of the CWS, where the window information includes the window value of the CWS.
  • the terminal Through the transmission of CWS window information, the terminal knows the current CWS. On the one hand, the terminal can perform unlicensed spectrum channel monitoring and channel occupation based on the received CWS; on the other hand, the terminal can also evaluate the unlicensed spectrum based on the CWS. The state of the channel condition on the spectrum.
  • the length of the contention window provided in this embodiment is based on whether there is data transmission on the PUSCH and/or PUCCH triggered by the downlink control command on the unlicensed spectrum.
  • the determined CWS is relative to the randomly confirmed CWS or always Using a fixed CWS can reduce the phenomenon of violent collisions between access nodes of channels on the unlicensed spectrum or low channel access efficiency caused by the unreasonable setting of the CWS.
  • the access node may include the aforementioned base station, terminal, and relay node (RN).
  • RN relay node
  • the transmission status of data transmission on the PUSCH and/or PUCCH may include: it may be represented by a transmission success rate or a transmission failure rate.
  • the transmission failure rate can be: the number of failed transmission data and the total number of transmitted data.
  • the transmission success rate can be: the number of successfully transmitted data and the total number of transmitted data.
  • the data transmission failure rate is high, and the probability of retransmission may be high, it indicates that the competition on the unlicensed spectrum is fierce.
  • S111 may include: adjusting the CWS according to the data transmission failure rate on the PUSCH and/or PUCCH.
  • S111 may include:
  • the CWS is increased.
  • the CWS on the unlicensed spectrum is determined based on whether data transmission on the PUSCH and/or PUCCH is detected.
  • the CWS at the current moment may be determined according to the transmission situation on the PUSCH and/or PUCCH in the previous time period.
  • the previous moment is any time period before the current moment.
  • the first threshold may be a statistical value set according to the transmission load and historical transmission conditions. In other embodiments, the first threshold may also be a simulated value or an experimental value based on experimental data,
  • Increasing CWS can include at least one of the following:
  • the increase rate is determined according to the difference of the transmission failure rate minus the first threshold, and based on the increase rate and the current CWS, the increased CWS is calculated.
  • the difference of the transmission failure rate minus the first threshold is positively correlated with the increase, that is, the greater the difference, the greater the increase.
  • the CWS is set with a maximum value and a minimum value. If the current CWS is less than the maximum value, the CWS is increased when the transmission failure rate is greater than the first threshold; the increase method can be any of the foregoing methods, Stop when CWS increases to the maximum value.
  • the CWS may be maintained, that is, the CWS at the current moment will continue to be used at the next moment.
  • the CWS is adjusted to the minimum value, that is, the minimum CWS value is continued to be used at the next moment.
  • S111 may include:
  • the CWS is adjusted according to the transmission status of the reference signal triggered by the downlink control command.
  • the base station detecting the random access status on the RACH and detecting the reference signal transmission status is similar to detecting the data transmission on the PUSCH and/or PUCCH. The difference is that: it detects the transmission of the RACH and the reference signal. channel.
  • the reference signal may include, but is not limited to, a channel sounding reference signal (Sounding Reference Signal, SRS).
  • SRS Sounding Reference Signal
  • the random access conditions on the RACH include: random access on the RACH and no random access on the RACH. If there is random access on the random access channel, it means that the downlink control command is successfully transmitted, which means that there is less competition for channel resources on the unlicensed spectrum, so that a smaller CWS is sufficient.
  • the random access status on the random access channel RACH triggered by the downlink control command may include:
  • the CWS is increased.
  • a small proportion of users performing random access on the RACH indicates that the channel that needs to reoccupy the unlicensed spectrum has a higher probability of retransmitting the downlink control command. Therefore, increase the CWS to increase the probability of the base station's occupancy of the channel where the unlicensed spectrum is located.
  • S111 may include:
  • the proportion of users who have reference signal transmission triggered by the downlink control command is less than the first At three thresholds, increase CWS.
  • the channel is sent through the reference signal. If the proportion of users with reference signal transmission is small, it means that the channel that needs to reoccupy the unlicensed spectrum is more likely to retransmit the downlink control command. Therefore, increase the CWS to increase the base station's access to the unlicensed spectrum. Occupancy probability of the channel.
  • S110 when the downlink control command on the unlicensed spectrum is used to trigger a change in terminal behavior, S110 may include:
  • Terminal behaviors are various behaviors of the terminal in the wireless communication process. For example, whether the terminal adjusts the uplink power according to the instructions.
  • the base station will detect the result of the change in the behavior of the terminal. For example, if the downlink control command instructs the terminal to adjust the uplink power, after receiving the uplink power of the terminal, the base station will determine the result of the change in the behavior of the terminal according to the match between the received power and the adjusted power indicated by the downlink control command. For another example, if the downlink control instruction instructs the terminal to switch cells, the base station will determine whether the terminal has changed its connected cell based on the cell that the terminal is connected to before the instruction and the cell that the terminal is connected to after the instruction, so as to determine the change in terminal behavior result.
  • S112 may include: when it is detected that no data transmission on the PUSCH and/or PUCCH triggered by the downlink control command is detected, adjusting the CWS according to the change result of the terminal behavior.
  • the CWS can be adjusted preferentially according to the transmission status of the data transmission on the PUSCH and/or PUCCH triggered by the downlink control command.
  • S112 may include: when it is detected that there is no data transmission on PUSCH and/or PUCCH triggered by a downlink control command, and there is no random access and/or reference signal on RACH triggered by a downlink control command During transmission, adjust the CWS according to the result of the change in terminal behavior.
  • S112 may include one of the following:
  • adjusting the CWS according to the result of the change in the behavior of the terminal includes:
  • the CWS is adjusted according to the adjustment status of the terminal according to the downlink control instruction to adjust the uplink transmission power.
  • adjusting the CWS according to the adjustment status of the terminal adjusting the uplink transmission power according to the downlink control instruction includes: increasing the CWS when the proportion of users whose uplink transmission power is not adjusted by the terminal according to the downlink control instruction reaches a fourth threshold.
  • adjusting the CWS according to the adjustment status of the terminal adjusting the uplink transmission power according to the downlink control instruction includes: reducing or maintaining the CWS when the proportion of users whose uplink transmission power is not adjusted by the terminal according to the downlink control instruction is less than a fourth threshold. For example, when CWS is greater than the minimum value of CWS, by reducing the CWS, the minimum value of CWS currently used by the base station can be made.
  • the method for adjusting the length of the contention window provided in this embodiment further includes:
  • Issue instruction information for triggering CWS adjustment where the instruction information is used to indicate the transmission status of the base station based on code block (CB), code block group (CBG) or transmission block (TB) Trigger the adjustment of CWS.
  • CB code block
  • CBG code block group
  • TB transmission block
  • N is a positive integer of 2 or more.
  • the adjustment of the CWS can be performed based on the transmission status of the CB level, or can be performed based on the transmission status of the TB level, or can be performed based on the transmission status of the CBG level.
  • the proportion of NACK in the HARQ-ACK of the CBG reaches the preset ratio to trigger the adjustment of the CWS.
  • the base station In order to inform the terminal, the base station will issue instruction information to inform the terminal that it is currently adjusting the CWS based on the transmission feedback of CB, CBG, or TB.
  • the terminal After the terminal receives the indication information, on the one hand, it knows the event that the base station triggers CWS adjustment, and on the other hand, it can refer to the event that the base station triggers CWS adjustment when adjusting its own CWS.
  • the specific reference depends on the terminal's own business conditions and/or transmission requirements.
  • the transmission status of the CB, CBG or TB here may be: the transmission status of the CB, CBG or TB transmitted in the previous period between the base station and the terminal. In other embodiments, the transmission status of the CB, CBG or TB here may be: the transmission status of the CB, CBG or TB interacted between the terminal and the base station in the current period.
  • the CB, CBG or TB here may be: CB, CBG or TB for uplink transmission, or CB, CBG or TB for downlink transmission.
  • the previous period or the current period here may correspond to a selected transmission unit such as a radio frame, a subframe, or a time slot.
  • this embodiment provides a device for adjusting the length of a contention window, which is applied to a base station, and the device includes:
  • the adjustment module is configured to adjust the competition window length CWS according to the behavior execution status triggered by the downlink control command when there is a downlink control command on the unlicensed spectrum.
  • the adjustment module provided by the embodiment of the present application may be a program module, and after the program module is executed by the processor, the CWS can be adjusted based on the behavior execution status triggered by the downlink control instruction.
  • the adjustment module may be a combination of software and hardware.
  • the combination of software and hardware includes, but is not limited to, various programmable arrays.
  • the programmable array includes, but is not limited to, a complex programmable array or a field programmable array.
  • the adjustment module when a downlink control command on the unlicensed spectrum is a downlink control command for triggering uplink transmission, the adjustment module is configured to use the physical uplink shared channel PUSCH and/or the PUSCH and/or the physical uplink shared channel triggered by the detection of the downlink control command.
  • the data transmission on the physical uplink control channel PUCCH adjusts the CWS.
  • the adjustment module is configured to adjust the CWS according to the data transmission status on the PUSCH and/or PUCCH when the data transmission on the PUSCH or PUCCH triggered by the downlink control command is detected.
  • the adjustment module is configured to adjust the CWS according to the data transmission failure rate on the PUSCH or PUCCH.
  • the adjustment module is configured to increase the CWS when the data transmission failure rate on the PUSCH or PUSCH triggered by the downlink control command is greater than the first threshold.
  • the adjustment module is configured to, when it is detected that no data transmission on the PUSCH and/or PUCCH triggered by the downlink control command, according to the random access on the random access channel triggered by the downlink control command Into the situation, adjust CWS.
  • the adjustment module is configured to, when a random access on the RACH triggered by a downlink control command is detected, the proportion of users who randomly access on the RACH triggered by the downlink control command is less than the second At the threshold, increase CWS.
  • the adjustment module is configured to adjust the CWS according to the transmission status of the reference signal triggered by the downlink control command when it is detected that no data transmission on the PUSCH and/or PUCCH triggered by the downlink control command is detected.
  • the adjustment module is configured to increase the CWS when the proportion of users performing reference signal transmission based on the downlink control command is less than the third threshold.
  • the adjustment module is configured to adjust the CWS according to the result of the change in the behavior of the terminal triggered by the downlink control instruction.
  • the adjustment module is configured to adjust the CWS according to the change result of the terminal behavior when detecting that no data transmission on the PUSCH and/or PUCCH triggered by the downlink control command is detected.
  • the adjustment module is configured to perform one of the following:
  • Adjust CWS When it is detected that there is no data transmission on PUSCH triggered by a downlink control command, and no random access on RACH triggered by a downlink control command and reference signal transmission triggered by a downlink control command, according to the result of the change of terminal behavior, Adjust CWS;
  • Adjust CWS When it is detected that there is no data transmission on PUCCH triggered by a downlink control command, and no random access on RACH triggered by a downlink control command and reference signal transmission triggered by a downlink control command, according to the result of the change in terminal behavior, Adjust CWS;
  • the adjustment module is configured to adjust the CWS according to the adjustment status of the terminal according to the downlink control instruction to adjust the uplink transmission power.
  • the adjustment module is configured to increase the CWS when the proportion of users whose uplink transmission power is not adjusted by the terminal according to the downlink control instruction reaches the fourth threshold.
  • the device further includes:
  • the issuing module is configured to issue indication information for triggering CWS adjustment, where the indication information is used to instruct the base station to trigger the adjustment of CWS based on the transmission status of the code block CB, the code block group CBG, or the transmission block TB.
  • the embodiment of this application shows how to adjust the CWS method (slot), symbol (symbol), subframe, radio frame or Other defined time units are the adjustment methods of CWS.
  • the base station When there is a downlink control command (for example, UL grant) for uplink transmission, and there is transmission of PUSCH or PUCCH, the base station adjusts the CWS based on the transmission status of the PUSCH or PUCCH.
  • a downlink control command for example, UL grant
  • the base station adds to the UL grant that the CWS adjustment is based on CB, CBG or TB level indication information.
  • the indication information here informs that the triggering of the CWS adjustment is based on the transmission status of CB, CBG or TB.
  • the terminal After receiving the downlink control command, the terminal can use the downlink control command to adjust the channel occupation time (Channel Occupancy Time, COT) CWS adjustment initiated by the terminal.
  • channel occupation time Channel Occupancy Time, COT
  • the value of the contention window length is increased.
  • the base station When there is a UL grant, but there is no PUSCH or PUCCH transmission, the base station adjusts the window value of the CWS based on the behavior of the terminal.
  • the UL grant When the UL grant is used to adjust the uplink power transmission of the terminal, it is determined whether the function of the terminal within the predefined observation window has adjusted the transmission power according to the instructions. If a predefined proportion (for example, 80%) of the target terminal does not adjust the uplink transmission power as instructed, then increase the contention window value.
  • a predefined proportion for example, 80%
  • This application shows how the channel access mechanism can accurately reflect the channel conditions on the unlicensed spectrum, which can effectively enable different transmission conditions within the channel occupation initiated by the base station, and ensure the fairness of the unlicensed spectrum Occupied.
  • the communication device includes: a transceiver, a memory, and a processor.
  • the transceiver can be used to interact with other devices.
  • the transceiver includes but is not limited to a transceiver antenna.
  • the memory may store computer-executable instructions; the processor is respectively connected to the transceiver and the memory, and can implement the method for adjusting the length of the competition window provided by any of the foregoing technical solutions.
  • a non-transitory computer-readable storage medium including instructions, such as a memory including instructions.
  • the foregoing instructions can be executed by a processor, and the processor can execute the foregoing instructions to implement any one of the foregoing technical solutions.
  • Fig. 7 shows a terminal according to an exemplary embodiment.
  • the terminal may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
  • the terminal 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, And the communication component 816.
  • the processing component 802 generally controls the overall operations of the terminal 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the foregoing method.
  • the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components.
  • the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.
  • the memory 804 is configured to store various types of data to support operations in the terminal 800. Examples of these data include instructions for any application or method operated on the terminal 800, contact data, phone book data, messages, pictures, videos, etc.
  • the memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable and Programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable and Programmable read only memory
  • PROM programmable read only memory
  • ROM read only memory
  • magnetic memory flash memory
  • flash memory magnetic disk or optical disk.
  • the power supply component 806 provides power for various components of the terminal 800.
  • the power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the terminal 800.
  • the multimedia component 808 includes a screen that provides an output interface between the terminal 800 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touch, sliding, and gestures on the touch panel. The touch sensor can not only sense the boundary of the touch or slide action, but also detect the duration and pressure related to the touch or slide operation.
  • the multimedia component 808 includes a front camera and/or a rear camera. When the terminal 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.
  • the audio component 810 is configured to output and/or input audio signals.
  • the audio component 810 includes a microphone (MIC), and when the terminal 800 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive external audio signals.
  • the received audio signal may be further stored in the memory 804 or transmitted via the communication component 816.
  • the audio component 810 further includes a speaker for outputting audio signals.
  • the I/O interface 812 provides an interface between the processing component 802 and a peripheral interface module.
  • the peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: home button, volume button, start button, and lock button.
  • the sensor component 814 includes one or more sensors for providing the terminal 800 with various status assessments.
  • the sensor component 814 can detect the open/close state of the terminal 800 and the relative positioning of components, such as the display and keypad of the terminal 800.
  • the sensor component 814 can also detect the position change of the terminal 800 or a component of the terminal 800. The presence or absence of contact with the terminal 800, the orientation or acceleration/deceleration of the terminal 800, and the temperature change of the terminal 800.
  • the sensor component 814 may include a proximity sensor configured to detect the presence of nearby objects when there is no physical contact.
  • the sensor component 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • the communication component 816 is configured to facilitate wired or wireless communication between the terminal 800 and other devices.
  • the terminal 800 can access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof.
  • the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication.
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • the terminal 800 may be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable A gate array (FPGA), controller, microcontroller, microprocessor, or other electronic components are implemented to implement the above methods.
  • ASIC application specific integrated circuits
  • DSP digital signal processors
  • DSPD digital signal processing devices
  • PLD programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor, or other electronic components are implemented to implement the above methods.
  • non-transitory computer-readable storage medium including instructions, such as the memory 804 including instructions, and the foregoing instructions may be executed by the processor 820 of the terminal 800 to complete the foregoing method.
  • 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.
  • Figure 8 is a schematic diagram of a base station.
  • the base station 900 includes a processing component 922, which further includes one or more processors, and a memory resource represented by a memory 932, for storing instructions that can be executed by the processing component 922, such as application programs.
  • the application program stored in the memory 932 may include one or more modules each corresponding to a set of instructions.
  • the processing component 922 is configured to execute instructions to execute the PDCCH detection method shown in FIG. 4 and/or FIG. 5.
  • the base station 900 may also include a power supply component 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to the network, and an input output (I/O) interface 958.
  • the base station 900 can operate based on an operating system stored in the storage 932, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, Free BSDTM or the like.

Landscapes

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

Abstract

L'invention concerne un procédé et un appareil de réglage de taille de fenêtre de contention, ainsi qu'un dispositif de communication et un support de stockage. Le procédé de réglage de taille de fenêtre de contention peut comprendre les étapes suivantes : lorsqu'il y a une instruction de commande de liaison descendante sur un spectre sans licence, réglage d'une taille de fenêtre de contention (CWS) en fonction d'une condition d'exécution de comportement déclenchée par l'instruction de commande de liaison descendante.
PCT/CN2019/108745 2019-09-27 2019-09-27 Procédé et appareil de réglage de taille de fenêtre de contention, dispositif de communication et support de stockage WO2021056475A1 (fr)

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PCT/CN2019/108745 WO2021056475A1 (fr) 2019-09-27 2019-09-27 Procédé et appareil de réglage de taille de fenêtre de contention, dispositif de communication et support de stockage
CN201980002111.7A CN110800360B (zh) 2019-09-27 2019-09-27 竞争窗长度调整方法及装置、通信设备及存储介质

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114493672A (zh) * 2021-12-30 2022-05-13 广州趣丸网络科技有限公司 虚拟物品的发放方法及系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114765899B (zh) * 2021-01-15 2024-08-23 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
CN114610138B (zh) * 2022-03-10 2023-08-08 中国科学院计算技术研究所 带宽控制单元、处理器芯片以及访存流量控制方法
WO2023245446A1 (fr) * 2022-06-21 2023-12-28 Nokia Shanghai Bell Co., Ltd. Communication à faible latence dans un spectre sans licence

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105722234A (zh) * 2016-02-05 2016-06-29 北京佰才邦技术有限公司 在非授权频段中调度资源的方法、基站和终端
CN109005596A (zh) * 2017-06-06 2018-12-14 华为技术有限公司 一种调整竞争窗长度的方法及设备
CN110167161A (zh) * 2018-02-14 2019-08-23 华为技术有限公司 一种确定竞争窗大小的方法和装置
US20190268108A1 (en) * 2015-08-13 2019-08-29 Electronics And Telecommunications Research Institute Apparatus for transmitting and receiving data through unlicensed band

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7166758B2 (ja) * 2015-05-14 2022-11-08 サムスン エレクトロニクス カンパニー リミテッド 無線通信システムにおけるコンテンションウィンドウを調整する方法及び装置
US11076387B2 (en) * 2015-11-03 2021-07-27 Samsung Electronics Co., Ltd. Method and device for transmitting or receiving control information in wireless communication system
CN109314615B (zh) * 2018-09-21 2022-03-01 北京小米移动软件有限公司 竞争窗口大小的调整方法及装置、数据发送设备
CN109952805B (zh) * 2019-01-17 2023-08-25 北京小米移动软件有限公司 非授权频段上的随机接入方法、装置和存储介质

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190268108A1 (en) * 2015-08-13 2019-08-29 Electronics And Telecommunications Research Institute Apparatus for transmitting and receiving data through unlicensed band
CN105722234A (zh) * 2016-02-05 2016-06-29 北京佰才邦技术有限公司 在非授权频段中调度资源的方法、基站和终端
CN109005596A (zh) * 2017-06-06 2018-12-14 华为技术有限公司 一种调整竞争窗长度的方法及设备
CN110167161A (zh) * 2018-02-14 2019-08-23 华为技术有限公司 一种确定竞争窗大小的方法和装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114493672A (zh) * 2021-12-30 2022-05-13 广州趣丸网络科技有限公司 虚拟物品的发放方法及系统

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