WO2019157919A1 - Procédé de gestion de fenêtre de contention et dispositif d'envoi - Google Patents

Procédé de gestion de fenêtre de contention et dispositif d'envoi Download PDF

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Publication number
WO2019157919A1
WO2019157919A1 PCT/CN2019/072869 CN2019072869W WO2019157919A1 WO 2019157919 A1 WO2019157919 A1 WO 2019157919A1 CN 2019072869 W CN2019072869 W CN 2019072869W WO 2019157919 A1 WO2019157919 A1 WO 2019157919A1
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Prior art keywords
harq
data packets
reference time
cbg
nack
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PCT/CN2019/072869
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English (en)
Chinese (zh)
Inventor
贾琼
朱俊
吴霁
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华为技术有限公司
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Priority claimed from CN201811031772.6A external-priority patent/CN110166182B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19754057.8A priority Critical patent/EP3755059B1/fr
Publication of WO2019157919A1 publication Critical patent/WO2019157919A1/fr
Priority to US16/991,227 priority patent/US11553531B2/en

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H04W40/16—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality based on interference

Definitions

  • the embodiments of the present application relate to the field of communications, and more specifically, to a technique for updating a contention window on an unlicensed band.
  • LAA Licensed Assisted Access
  • R-13 Enhanced Authorized Spectrum Assisted Access
  • Release 14 Release-14, R-14
  • LBT Listen before talk
  • the application of the unlicensed band is still a business needs to enhance the technical means to the user experience.
  • the type 4 LBT Cat 4 LBT, also referred to as type 1 LBT in some standards
  • the random backoff number is subjected to a random backoff of the corresponding number to avoid collision.
  • the random backoff number usually selects a random value between 0 and the competition window CW at the time of initialization.
  • the above CW will be dynamically updated with the state of the channel. As the transmission resources in the 5GNR are more and more finely divided, how to determine the CW more accurately becomes an urgent problem to be solved.
  • the embodiment of the present application provides a method and apparatus for contention window management applied to an unlicensed frequency band.
  • an embodiment of the present application provides a method for contention window management, including: a sending device sends one or more data packets to one or more receiving devices in one or more reference time units, the one or more The data packet occupies a first bandwidth; the transmitting device receives a hybrid automatic repeat request HARQ for the one or more data packets from the one or more receiving devices;
  • the transmitting device determines a contention window CW size of the second bandwidth by referring to HARQ of the one or more data packets.
  • the update of the contention window CW can be determined based on the HARQ feedback of the data packet, and the communication efficiency is improved.
  • the transmitting device determines the contention window CW size of the second bandwidth by referring to the HARQ of the one or more data packets, including:
  • a ratio Z of NACKs or ACKs in the HARQ of the one or more data packets is a ratio Z of NACKs or ACKs in the HARQ of the one or more data packets.
  • the hybrid automatic repeat request HARQ for the one or more data packets includes one or a combination of the following:
  • HARQ TB HARQ of the transport block TB corresponding to the one or more first data packets; or HARQ, CBG HARQ of one or more coded block groups CBG corresponding to one or more second data packets.
  • the ratio Z conforms to the following formula:
  • Z' represents the ratio of CBGs in a TB that are fed back as negative acknowledgment NACKs
  • N CBG represents the number of CBGs in one TB
  • NACK CBG represents the number of CBGs that feed back NACKs
  • NACK TB represents the one or more reference time units
  • N TB represents the number of TBs transmitted in the one or more reference time units
  • x is the number of TBs based on CBG transmissions in the one or more reference time units.
  • the ratio Z conforms to the following formula:
  • NACK TB represents the number of TBs with TB as the minimum feedback unit and feedback NACK in one or more reference time units.
  • N TB represents the total number of TBs transmitted in one or more reference time units, and x is the number of TBs with CBG as the minimum feedback unit in one or more reference time units.
  • ⁇ and ⁇ represent weighting factors of CBG-based HARQ feedback and TB-based HARQ feedback, respectively.
  • ⁇ + ⁇ 1, exemplarily, the values of ⁇ and ⁇ may be 0 and 1, respectively.
  • ⁇ and ⁇ represent weighting factors of CBG-based HARQ feedback and TB-level HARQ feedback, respectively.
  • ⁇ + ⁇ 1, exemplarily, the values of ⁇ and ⁇ may be 0 and 1, respectively.
  • the HARQ determining the contention window CW size of the second bandwidth by referring to the one or more data packets includes:
  • the one reference time unit is a start time unit in a recent transmission of the transmitting device.
  • the HARQ determining the contention window CW size of the second bandwidth by referring to the HARQ of the one or more data packets includes:
  • the HARQ of the one or more data packets includes: HARQ of the one or more data packets sent in the most recent each of the multiple reference time units on a non-overlapping frequency domain unit.
  • the hybrid automatic repeat request HARQ of the one or more data packets only includes the TB HARQ of the one or more first data packets.
  • the ratio Z conforms to the following formula:
  • NACK TB represents the number of TBs that feed back NACK in one reference time unit
  • N TB represents the number of TBs transmitted in one reference time unit
  • the hybrid automatic repeat request (HARQ) of the one or more data packets only includes the CBG HARQ of the one or more second data packets, and the ratio Z conforms to the following formula:
  • N CBG represents the number of CBGs transmitted by the one or more reference time units
  • NACK CBG represents the number of CBGs that feed back NACKs.
  • the method for adjusting the contention window provided by the present application can increase the value of the contention window when the channel quality is poor, so that the transmitting device can have a longer time to backoff and avoid collision and cause interference; when the channel quality is good, the system restarts.
  • the competition window or the reduced contention window enables the transmitting device to complete the backoff in a short time and shorten the channel access time.
  • an embodiment of the present application provides a contention window management apparatus for a network device, including means or means for performing the various steps of the above first aspect.
  • an embodiment of the present application provides a contention window management apparatus for a terminal device, including means or means for performing the various steps of the above first aspect.
  • the present application provides a communication device including a processor and a memory, the memory is configured to store a computer execution instruction, and the processor is configured to execute a computer execution instruction stored in the memory to cause the communication device The method described in the first aspect is performed.
  • the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method of the first aspect.
  • the present application provides a chip connected to a memory for reading and executing a software program stored in the memory to implement the method of the first aspect.
  • the application provides a communication system, comprising the network device according to the second aspect and the terminal device of the third aspect.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of determining a reference time unit according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of determining a reference time unit according to another embodiment of the present application.
  • FIG. 9 is a schematic diagram of determining a reference time unit according to another embodiment of the present application.
  • FIG. 10 is a schematic diagram of CW inheritance in a flexible bandwidth scenario according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of CW inheritance in a flexible bandwidth scenario according to another embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of CW update according to an embodiment of the present application.
  • FIG. 13 is a schematic diagram of CW update according to another embodiment of the present application.
  • FIG. 14 is a schematic diagram of CW update according to another embodiment of the present application.
  • FIG. 15 is a schematic diagram of CW update according to another embodiment of the present disclosure.
  • 16 is a schematic diagram of CW update provided by another embodiment of the present application.
  • FIG. 17 is a schematic diagram of multiple reference time unit CW updates according to an embodiment of the present application.
  • FIG. 18 is a schematic diagram of CW update according to another embodiment of the present application.
  • FIG. 19 is a schematic diagram of CW update according to another embodiment of the present disclosure.
  • FIG. 20 is a schematic diagram of multiple reference time unit CW updates according to an embodiment of the present application.
  • FIG. 21 is a flowchart of a channel listening method based on multiple antenna panels according to an embodiment of the present disclosure
  • FIG. 22 is a schematic diagram of a multi-antenna panel and a CW according to an embodiment of the present application.
  • FIG. 23 is a schematic diagram of a multi-antenna panel and a CW according to another embodiment of the present application.
  • 24 is a schematic diagram of a multi-antenna panel and a CW according to another embodiment of the present application.
  • 25 is a schematic diagram of a multi-antenna panel and a CW according to another embodiment of the present application.
  • FIG. 26 is a schematic diagram of a multi-antenna panel and a CW according to another embodiment of the present application.
  • FIG. 27 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 28 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • the network architecture may be a network architecture of a wireless communication system, and the wireless communication system may work in an authorized frequency band or in an unlicensed frequency band. It can be understood that the use of unlicensed frequency bands can improve the system capacity of the wireless communication system, improve channel access efficiency, improve spectrum resource utilization, and ultimately improve system performance.
  • the wireless communication system may include a network device and a terminal, and the network device and the terminal are connected by a wireless communication technology. It should be noted that the number and the configuration of the terminal and the network device shown in FIG. 1 do not constitute a limitation on the embodiments of the present application.
  • a wireless communication system can include one or more network devices, and one network device can connect to one or more terminals. The network device can also be connected to a core network device, which is not shown in FIG.
  • the wireless communication system mentioned in the embodiments of the present application includes, but is not limited to, a narrow band-internet of things (NB-IoT), and a global system for mobile communications (GSM).
  • GSM global system for mobile communications
  • EDGE Enhanced data rate for GSM evolution
  • WCDMA wideband code division multiple access
  • CDMA2000 code division multiple access
  • TD-SCDMA Time division-synchronization code division multiple access
  • LTE long term evolution
  • future mobile communication system includes, but is not limited to, a narrow band-internet of things (NB-IoT), and a global system for mobile communications (GSM).
  • EDGE Enhanced data rate for GSM evolution
  • WCDMA wideband code division multiple access
  • CDMA2000 code division multiple access
  • TD-SCDMA Time division-synchronization code division multiple access
  • LTE long term evolution
  • future mobile communication system future mobile communication system.
  • the foregoing network device is a device deployed in a radio access network to provide a wireless communication function for the terminal.
  • the network device may include, but is not limited to, a base station (BS), a station (Station, STA, including an access point (AP) and a non-AP station STA), a network controller, and a transmission and reception point (transmission and reception point) , TRP), a mobile switching center or a wireless access point in wifi, etc.
  • the means for direct communication with the terminal over the wireless channel is typically a base station.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points, or Radio Radio Units (RRUs).
  • RRUs Radio Radio Units
  • the wireless communication with the terminal may also be another network device having a wireless communication function, which is not limited in this application.
  • the names of devices with base station functions may be different in different systems, for example, in an LTE network, called an evolved NodeB (eNB or eNodeB), in the third generation (the In the 3rd generation, 3G) network, it is called Node B (Node B), etc.
  • eNB evolved NodeB
  • Node B Node B
  • 5G base station 5G base station
  • gNB 5G base station
  • the terminal which is also referred to as a terminal device, may include, for example, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., and is a voice and/or A device that communicates with data, for example, a handheld device with wireless connectivity, an in-vehicle device, a wearable device, a computing device, or other processing device that is linked to a wireless modem.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • a device that communicates with data
  • a handheld device with wireless connectivity for example, a handheld device with wireless connectivity, an in-vehicle device, a wearable device, a computing device, or other processing device that is linked to a wireless modem.
  • some examples of terminals are: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality. (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in
  • system and “network” are used interchangeably herein.
  • “at least one” means one or more, and "a plurality” means two or more.
  • the character “/” generally indicates that the contextual object is an "or” relationship.
  • “At least one of the following” or a similar expression thereof refers to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c may represent: a, b, c, ab, ac, bc, or abc, where a, b, c may be single or multiple .
  • the method for applying the contention window management on the unlicensed frequency band proposed by the present application is based on a more flexible resource transmission unit in the NR system, and proposes an update mechanism of a contention window (CW) in channel interception. Achieve more accurate competitive window updates.
  • CW contention window
  • the method of the contention window management of the present application will be exemplarily explained from the resource transmission unit and the channel listening competition window, respectively.
  • the receiving device needs to feed back a hybrid automatic repeat request (HARQ) to the sending device, so that the sending device determines whether the transmission is correct, and if necessary Retransmit the packet with the wrong transmission.
  • the sending device and the receiving device may be network devices or terminals.
  • the sending device is a network device
  • the receiving device is a terminal.
  • the network device may send one or more data packets to one or more terminals on one or more reference time units; when the sending device is The terminal, then the receiving device is a network device.
  • the terminal may send one or more data packets to one network device on one or more reference time units.
  • the basic unit when the HARQ feedback of the receiving device or the retransmission of the transmitting device is received and/or HARQ feedback is specified by the communication system is a basic unit.
  • a data packet is in units of a transport block (TB).
  • the receiving device finds that one TB is not successfully received, the receiving device may feed back the NACK of the one TB that was not successfully received to the transmitting device. After receiving the NACK of a TB, the transmitting device will retransmit the TB that was not successfully received in the subsequent transmission.
  • This TB-based feedback HARQ-based mechanism can be referred to as a TB response (TB-ACK).
  • data reception and/or HARQ feedback may be based on smaller units, e.g., the data packet may also include one or more coding blocks.
  • a CB can have an independent check function. For example, each CB performs cyclic redundancy check (CRC) coding, so that the receiving device can determine the CRC by decoding each CB. Whether it is correctly decoded.
  • CRC cyclic redundancy check
  • One TB can be divided into K code block groups (CBGs), where K ⁇ 1, and one CBG includes at least one CB.
  • CBGs K code block groups
  • the receiving device can feed back HARQ based on one CBG.
  • CBG-ACK CBG response
  • both the TB feedback HARQ based mechanism and the CBG feedback HARQ based mechanism can be supported.
  • the subcarrier spacing of the data channel in the LTE system is fixed at 15 kHz.
  • the 5G NR system can support multiple optional subcarrier spacings, including 15 kHz, 30 kHz, 60 kHz, and the like.
  • the larger subcarrier spacing corresponds to a shorter uplink symbol length
  • the corresponding symbol length becomes the symbol length corresponding to the original 15 kHz subcarrier spacing.
  • the length of a transmission time interval (TTI) corresponding to a slot or a data packet also becomes original.
  • TTI transmission time interval
  • carrier aggregation (CA) technology is introduced in the LTE system, and data information is transmitted using multiple carriers.
  • Each carrier referred to as a component carrier (CC)
  • CC component carrier
  • TBs transport blocks
  • the scheduling signaling (DL grant/UL grant) is used for scheduling, where the carrier and the carrier carrying the scheduling signaling may be the same carrier (the current carrier scheduling) or different carriers (cross-carrier scheduling).
  • the 5GNR system in addition to supporting data transmission in carrier aggregation mode, it can also support wideband (WB) transmission technology to expand the bandwidth occupied by one carrier, for example, from the original 20MHz bandwidth of the LTE system to N*20MHz.
  • WB wideband
  • the subcarrier spacing can be increased at the same time. For example, the 15 kHz interval from the original LTE system is increased to N*15 kHz, so that the bandwidth is kept while the sampling rate is kept constant.
  • one carrier of the NR wideband system is extended to 40 MHz, and the carrier includes two sub-bands (SubBanD, SBD), each of which has a bandwidth of 20 MHz, and one physical resource block (PRB) includes 12 subcarriers and subcarriers.
  • the interval is 30 kHz, and one subframe includes 14 time domain symbols, each time domain symbol is 1/2 of LTE (15 kHz subcarrier spacing) time domain symbol length, and one subframe length is 0.5 ms;
  • one transport block can carry On 40MHz carrier *0.5ms time-frequency resources.
  • the LTE Release 13 introduces a licensed-assisted access using long term evolution (LAA-LTE) technology, and the Release 14 enhanced authorization auxiliary connection.
  • LAA-LTE long term evolution
  • the enhanced LAA (eLAA) technology through carrier aggregation technology, can extend the available frequency bands to the unlicensed frequency bands and transmit downlink and uplink information on the unlicensed frequency bands through the assistance of the licensed frequency bands.
  • the Multefire standard further implements the uplink and downlink transmission (including the traffic channel and control channel) of the LTE system completely in the unlicensed band, without relying on the assistance of the licensed band, that is, Standalone transmission.
  • the LAA/eLAA/Multefire system adopts the LBT channel access mechanism.
  • the sending node needs to listen to the channel before sending the information on the unlicensed band, and then send the downlink information after the channel is idle.
  • the sending node detects that the channel is idle before the resource that it wants to occupy, which is called LBT listening success, otherwise it is called LBT listening failure.
  • the channel After the channel is occupied by the transmitting device, the channel can continuously occupy the channel to send information, and the continuously occupied time domain resource is called a burst.
  • the maximum time that the sending device can continuously send information after the channel is occupied is the maximum channel occupancy time (MCOT).
  • MCOT maximum channel occupancy time
  • the transmitting device After the transmitting device continues to occupy the channel and reaches the MCOT, the channel needs to be released, and the LBT can be re-executed before being accessed again.
  • the transmitting device performs channel sensing, there are two channel states: channel idle and channel busy.
  • the criterion for determining the channel state is: the wireless communication device compares the power on the received channel in the listening time slot with a clear channel assessment-energy detection (CCA-ED), if the detection threshold is higher than the detection threshold, the state Busy for the channel; if below the detection threshold, the state is channel idle.
  • CCA-ED clear channel assessment-energy detection
  • a transmitting device operating in an unlicensed frequency band may use a clear channel assessment (CCA) mechanism to access a channel, that is, a network device may use a random backoff CCA access channel to transmit downlink information, and the terminal may use a random backoff CCA mechanism.
  • the incoming channel sends uplink information.
  • the random backoff CCA mechanism may be termed a first access channel type (Type l channel access)
  • T d listener within the channel is idle, the need for random backoff further, in performing a random backoff It is only possible to transfer. Specifically, after the transmitting device listens to the channel for a period of time T d , the random backoff is performed according to the following steps:
  • Step 1 Initialization, uniformly randomly selecting a value between 0 and CW as the initial value N init , and performing step 4;
  • Step 3 Perform channel sounding in a backoff time slot. If the channel is detected to be idle, go to step 4. Otherwise, go to step 5.
  • Step 5 The interception channel until a time period T d encounter the case that a channel is occupied, or until a time period T d listener the channel is idle;
  • Step 6 If all the backoff slots within the channel in said channel additional T d are both idle, step 4, otherwise step 5.
  • the transmitting device may wait for a period of time after the back-off counter is zero, without immediately transmitting the information, and wait for the end, and then listen for an additional time slot before the time when the information needs to be sent, if the additional If the channel is detected to be idle in the time slot, the channel is considered to be successful, and the information can be sent immediately. If the backoff counter is zeroed before the start time of the message, or if the additional listening time slot is busy, the channel listening is said to have failed.
  • the sending device includes a terminal device or an access network device. After the CGE of the access network device succeeds in performing the random backoff, the corresponding MCOT is the DL MCOT. After the terminal device succeeds in performing a random backoff, the corresponding MCOT is a UL MCOT.
  • CW is the competition window
  • CWS contention window size
  • the transmitting device dynamically adjusts the CWS and uses it for the next channel listening. Specifically, before sending the information, the sending device determines a reference time unit that has previously sent the data packet, and according to the HARQ response (HARQ-ACK) of the receiving device for the data packet on the reference time unit (HARQ-ACK) Also known as HARQ acknowledgment, HARQ information, HARQ feedback, HARQ acknowledgment feedback, HARQ reception status, etc., the CWS is dynamically adjusted. The receiving device feeds back the HARQ response to the sending device, so that the sending device retransmits the data packet with the wrong transmission.
  • HARQ-ACK HARQ response
  • HARQ-ACK reference time unit
  • HARQ-ACK also known as HARQ acknowledgment, HARQ information, HARQ feedback, HARQ acknowledgment feedback, HARQ reception status, etc.
  • the transmitting node increases the CWS, the next time LBT uses the increased CW for channel sensing, avoids collision with surrounding competing nodes at the cost of lengthening the listening time, and implements friendly coexistence; when the HARQ response corresponding to the data packet on the reference time unit includes the ACK status, Or when the proportion of the NACK state is small, the transmitting device reduces the CWS, thereby reducing the listening time and improving the efficiency of the access channel.
  • the transmitting device receives one or more ACKs for the reference time unit, the transmitting node decreases the CWS, whereas the transmitting node increases the CWS.
  • the embodiment of the present application proposes a CW management method. Referring to FIG. 2, for the convenience of description, only one receiving device is shown in the figure. It can be understood that the method of the present application can be applied to multiple receiving devices. The method includes the following steps:
  • the transmitting device sends one or more data packets to the one or more receiving devices in one or more reference time units, where the one or more data packets occupy the first bandwidth.
  • First bandwidth refers to a range of frequency domains that may include one or more frequency domain elements.
  • the frequency domain unit in this embodiment and the following may correspond to one carrier (referred to as component carrier (CC)), subband (SBD), or part bandwidth (BWP).
  • CC component carrier
  • SBD subband
  • BWP part bandwidth
  • Different frequency domain units can correspond to the same device or different devices.
  • the above data packet may be based on a CBG for receiving and/or performing HARQ feedback (hereinafter referred to as "CBG granularity based data packet"), or a data packet based on TB for receiving and/or performing HARQ feedback (below) Known as "packet based on terabyte granularity").
  • CBG granularity based data packet a CBG for receiving and/or performing HARQ feedback
  • Packet based on terabyte granularity Known as "packet based on terabyte granularity”
  • One or more data packets may all be CBG granularity based data packets, or one or more data packets may all be TB granularity based data packets, or one or more data packets may be TB granularity based data packets and A packet based on CBG granularity.
  • the reference time unit may be a frame, a transmission time interval (TTI) subframe, a mini-slot, a non-slot or a slot.
  • TTI transmission time interval
  • the reference time unit refers to a start time unit in the most recent transmission of the transmitting device, and receives the HARQ-ACK feedback corresponding to the reference time unit, which will be more specifically described below. .
  • the reference time unit may be a time unit corresponding to the smallest subcarrier spacing.
  • the reference time unit when 15 kHz, 30 kHz, and 60 kHz subcarrier spacing coexist, the reference time unit is a time unit corresponding to a subcarrier spacing of 15 kHz (refer to FIG. 3); when a 30 kHz, 60 kHz subcarrier interval coexists, the reference time unit is a subcarrier spacing. Time unit corresponding to 15 kHz (please refer to Figure 4).
  • the reference time unit may be the longest one in the slot structure (please refer to FIG. 5). ), or the shortest one in the slot structure (please refer to Figure 6).
  • the reference time unit is a time unit in the last transmission of the sending device, and the most recent transmission refers to the transmission of the transmitting device successfully accessing the device and transmitting the data packet. This is because, in the application scenario of the unlicensed band, there is a time when the transmitting device fails to contend to the channel and cannot transmit the data packet. Therefore, there is a certain time interval when the last transmission and the transmitting device are listening.
  • the reference time unit may be the first time unit in the last transmission of the transmitting device, or the reference time unit may be the last time unit in the last transmission of the transmitting device.
  • the transmitting device since the channel is successfully accessed, the transmitting device starts to transmit a data packet at time unit k, at which time the transmission of the time unit k is the last transmission, and the reference time unit is the time unit k.
  • the transmitting device since the channel is not successfully accessed, the transmitting device does not transmit the data packet in the time unit k, but in the time unit kn, the transmitting device transmits the data packet in the time unit kn due to successful access to the channel.
  • the transmission of the time unit kn is the latest transmission, at which time the time unit k cannot be used as the reference time unit, and the time unit kn is used as the reference time unit, where n is the number of time units included in one transmission.
  • the first bandwidth includes a frequency domain unit 1 and a frequency domain unit 2 as an example.
  • the transmitting device transmits the data packet on the frequency domain unit 1 in time unit k, so its reference time unit is time unit k. Since the frequency domain unit 2 fails to contend for the channel, the transmitting device transmits the data packet on the frequency domain unit 2 in the time unit k-n, the most recent transmission occurring in the time unit k-n. At this time, the transmitting device transmits one or more data packets to the one or more receiving devices within the reference time units k and kn, the one or more data packets occupying the first bandwidth including the frequency domain unit 1 and the frequency domain unit 2. .
  • the one or more receiving devices receive one or more data packets from the transmitting device and feed back the HARQ based on the one or more data packets.
  • the receiving device receives the data packet and verifies the received data packet.
  • the receiving device feeds back NACK or ACK based on one CBG.
  • the receiving device feeds back a NACK or ACK based on one TB. Since the receiving device receives one or more data packets sent by the transmitting device in one or more reference time units, the receiving device feeds back HARQ based on the one or more data packets, which may reflect the channel in the one or more reference time units the quality of.
  • the transmitting device receives a hybrid automatic repeat request (HARQ) based on the one or more data packets from the one or more receiving devices.
  • HARQ hybrid automatic repeat request
  • the sending device receives the TB feedback based HARQ, the CBG feedback based HARQ in the one or more reference time units in the HARQ from the receiving device, or both the TB feedback based HARQ and the CBG feedback based HARQ.
  • the hybrid automatic repeat request HARQ for one or more data packets includes one or a combination of: HARQ (TB HARQ) of the transport block TB corresponding to one or more first data packets; or, one or HARQ (CBG HARQ) of one or more coding block groups CBG corresponding to a plurality of second data packets.
  • the sending device determines a contention window CW size of the second bandwidth by referring to HARQ of the one or more data packets.
  • the transmitting device determines a contention window size of the second bandwidth, and performs channel sensing on the second bandwidth according to the determined contention window size.
  • the transmitting device needs to perform subsequent transmissions on the second bandwidth, since the HARQ information reflects the quality of the channel in the previous transmission.
  • the frequency domain occupied by the first bandwidth of the sending device may be the same as the second bandwidth, or the frequency domain occupied by the first bandwidth of the sending device may be different from the second bandwidth.
  • the contention window needs to be extended so that the transmitting device can have a longer time to perform the backoff.
  • the transmitting device may perform channel sensing on the second bandwidth according to the determined contention window size.
  • the value of the contention window CW can be referred to Table 1 below:
  • CW p is used to indicate the corresponding CW.
  • the contention window CW size of the second bandwidth by referring to the HARQ of the one or more data packets, determining a contention window of the second bandwidth, for example, determining to increase CW p and maintaining, and the transmitting device follows the updated CW p
  • the second bandwidth performs channel listening; or otherwise reinitializes to a minimum contention window or a contention window that reduces the second bandwidth.
  • the response of the HARQ includes at least one or more of the following states: acknowledgement (ACK), negative acknowledgement (NACK), non-continuous Discontinuous transmission (DTX).
  • ACK acknowledgement
  • NACK negative acknowledgement
  • DTX non-continuous Discontinuous transmission
  • the DTX may also be processed by the NACK, or the DTX may be ignored.
  • determining a contention window CW size of the second bandwidth with reference to the HARQ of the one or more data packets includes:
  • the contention window CW of the second bandwidth is determined according to the ratio Z.
  • the above reference means that the HARQ of one or more data packets is an input of the contention window CW that determines the second bandwidth.
  • the transmitting device may determine the contention window size of the second bandwidth according to the ratio of the CBG-based NACK or the ACK to the total number of HARQs in one or more data packets; when the HARQ includes both
  • the transmitting device may first convert the NACK or ACK ratio of the CBG-based HARQ into a TB-based NACK ratio or ACK ratio, and then in one or more data packets.
  • the other TB-based NACK ratio or ACK ratio combination determines the size of the contention window of the second bandwidth; or, when the HARQ only includes the HARQ based on the TB feedback, the transmitting device may base the NACK based on the TB feedback in one or more data packets. Or the ratio of ACK to the total number of HARQs determines the contention window size of the second bandwidth.
  • Determining the contention window CW of the second bandwidth according to the ratio Z includes: increasing the contention window of the first bandwidth when the ratio Z of the NACK is greater than or equal to the first preset value; otherwise, reinitializing to the smallest contention window or decreasing the second The competition window for bandwidth.
  • the first preset value may be a specific value, or the first preset value may dynamically select a value from a preset range. The selection of the preset value may be performed by referring to the channel quality.
  • the sending device determines the ratio Z by referring to the number of CBGs in which the HARQ is NACK in one or more CBGs
  • the first preset value is 80%
  • the ratio Z is greater than or equal to 80%
  • the second bandwidth is extended. Competition window, otherwise reinitialized to the smallest contention window or to reduce the contention window of the second bandwidth.
  • the sending device determines the ratio Z by referring to the number of CBGs in which the HARQ is ACK in one or more CBGs
  • the first preset value is 20%
  • the ratio Z is less than or equal to 20%
  • the first bandwidth is extended. Competition window, otherwise reinitialized to the smallest contention window or to reduce the contention window of the second bandwidth.
  • one way to calculate the ratio Z is to have both a data packet with a minimum feedback unit of TB and a data packet with a minimum feedback unit of CBG in a data packet transmitted by one or more reference time units. Then, the HARQ received by the transmitting device includes HARQ based on TB feedback, and also includes HARQ based on CBG feedback.
  • the above ratio Z conforms to the following formula:
  • Z' represents the ratio of CBGs fed back to NACK in one TB
  • N CBG represents the number of CBGs in one TB
  • NACK CBG represents the number of CBGs that feed back NACKs in one TB
  • NACK TB represents TB in one or more reference time units
  • N TB represents the total number of TBs transmitted in one or more reference time units
  • x is the total of TBs with the CBG as the minimum feedback unit in one or more reference time units quantity.
  • Another way of calculating the ratio Z is to use TB as the minimum feedback unit in multiple data packets transmitted by one or more reference time units, or to feed the ACK with the CBG as the minimum feedback unit, or If the rule determines whether the corresponding TB is ACK or NACK, then the above ratio Z conforms to the following formula:
  • NACK TB represents the total number of TBs that feed back NACKs in one or more reference time units
  • N TB represents the total number of TBs transmitted in one or more of the reference time units.
  • the foregoing rule for determining whether the corresponding TB is an ACK or a NACK may be that after the ratio of the NACK in the feedback of the CBG in the TB exceeds a certain threshold, the HARQ of the TB is considered to be a NACK.
  • NACK CBG represents the total number of CBGs that feed back NACKs in one or more reference time units
  • N TB represents the total number of CBGs transmitted in one or more reference time units
  • Another way to calculate the ratio Z is to have a data packet with TB as the minimum feedback unit and a data packet with the CBG as the minimum feedback unit in the data packet transmitted by one or more reference time units.
  • the data packet with the CBG as the minimum feedback unit there are both HARQ feedback based on CBG transmission, that is, HARQ feedback transmitted in units of CBG; and HARQ feedback based on TB transmission, that is, HARQ transmitted in units of TB Feedback.
  • the HARQ received by the transmitting device includes HARQ based on TB feedback, and also includes HARQ based on CBG feedback.
  • the above ratio Z conforms to the following formula:
  • NACK TB represents the number of TBs in which one or more reference time units have TB as the minimum feedback unit and feeds back NACK, that is, the number of TBs that perform HARQ feedback based on TB and feed back NACK.
  • N TB represents the total number of TBs transmitted in the one or more reference time units, and x is the number of TBs based on CBG for HARQ feedback in the one or more reference time units, which can be understood as the minimum feedback with CBG
  • the number of TBs of the unit or in other embodiments, the number of TBs that are transmitted based on the CBG.
  • Z' represents the NACK ratio of one TB, where N CBG represents the number of CBGs in one TB, and NACK CBG represents the number of CBGs that feed back NACKs in the one TB.
  • ⁇ and ⁇ represent weighting factors of CBG-based HARQ feedback and TB-based HARQ feedback, respectively.
  • ⁇ + ⁇ 1.
  • the values of ⁇ and ⁇ may be 0 and 1, respectively, or 0.5 and 0.5, respectively, and may also be other values, which is not limited in the application.
  • TB1 includes both CBG-based HARQ feedback and TB-based HARQ feedback.
  • Z' represents the NACK ratio of one TB, where N CBG represents the number of CBGs in one TB, and NACK CBG represents the number of CBGs that feed back NACKs in the one TB.
  • ⁇ and ⁇ represent weighting factors of CBG-based HARQ feedback and TB-based HARQ feedback, respectively.
  • ⁇ + ⁇ 1.
  • the values of ⁇ and ⁇ may be 0 and 1, respectively, or 0.5 and 0.5, respectively, and may also be other values, which is not limited in the application.
  • TB2 includes both CBG-based HARQ feedback and TB-based HARQ feedback;
  • N NACK 1
  • the receiving device performs HARQ feedback according to the configured maximum number of supported CBGs, and at this time, for those that are not actually scheduled, but are The receiving device defaults to NACK CBG, which is not included in the calculation of Z;
  • the data packet scheduled by the sending device is not actually sent, and the receiving device follows the scheduling data packet according to the scheduling signaling.
  • the default rule feedback is NACK, and these NACKs are not counted in the calculation of Z.
  • the transmitting device transmits on the reference time units kn and k, and when calculating the Z value, only the HARQ feedback of the data packet transmitted by the latest transmission reference time unit k from the LBT process is considered, and for reference The HARQ feedback of the data packet transmitted by the frequency domain unit 1 on the time unit kn is not calculated.
  • the initial value of CW p is 3.
  • the transmitting device receives the ratio of the NACK in the HARQ for the data packet sent by one reference time unit, and determines the CW of the first bandwidth.
  • the value of CW p can be inherited in different frequency domain units. It is assumed that the selection of the frequency domain unit can be flexibly changed when the LBT is performed, and the frequency domain unit of the second bandwidth can inherit the CW value of the frequency domain unit of the first bandwidth.
  • the frequency domain unit in the second bandwidth may inherit the largest or smallest CW value of each frequency domain unit in the first bandwidth.
  • the frequency domain unit within the second bandwidth may inherit the CW value of the frequency domain unit within the first bandwidth.
  • the frequency domain unit in the first bandwidth is 20 MHz
  • the frequency domain unit in the second bandwidth is 40 MHz.
  • the frequency domain unit changes from small to large, and the transmitting device has a 40 MHz basic bandwidth unit in the second bandwidth.
  • the value of CW p can inherit the CW value of the largest 20 MHz basic bandwidth unit in the first bandwidth.
  • the frequency domain unit in the first bandwidth is 40 MHz
  • the frequency domain unit in the second bandwidth is 20 MHz.
  • the value of CW p of the basic bandwidth unit may inherit the CW value of the 40 MHz frequency domain unit in the first bandwidth as a value.
  • the update may be further performed according to the HARQ feedback situation in the reference time unit, such as extending or decreasing.
  • the transmitting device determines the HARQ of the data packet according to at least one HARQ of the one or more CBGs, and determines the contention window CW of the first bandwidth according to at least the HARQ of the determined data packet.
  • the transmitting device determines that the HARQ of the data packet is based on at least one HARQ of the one or more CBGs refers to the HARQ of the HARQ determination data packet of one or more CBGs included in the data packet.
  • the sending device may determine that the HARQ of the data packet is a NACK according to the HARQ of the one CBG sent by the receiving device, and the sending device may send the CBG according to the receiving device.
  • the HARQ is ACK
  • the HARQ of the data packet is determined to be an ACK.
  • the transmitting device may The HARQ of the one data packet is determined to be an ACK. If the number of CBGs in which the HARQ is a NACK is greater than the number of CBGs in which the HARQ is an ACK, the transmitting device may determine that the HARQ of the one data packet is a NACK.
  • the transmitting device increases the contention window; when it is determined that the HARQ of the data packet is ACK, the transmitting device narrows the contention window.
  • the increasing or decreasing the contention window may be performed by adjusting the length of the window. For example, when the contention window needs to be increased, the sending device increases by 1 based on the length of the current contention window; when the contention window needs to be reduced, the transmitting device Shorten by 1 based on the length of the current contention window. It can be understood that the length of the contention window can be adjusted by the sending device in units of one or other time lengths, which is not limited in this application.
  • step 304 determining a contention window CW size of the second bandwidth by using the HARQ of the one or more data packets includes:
  • the contention window CW size of the second bandwidth is determined by reference to the HARQ of the one or more data packets transmitted within one reference time unit, and one reference time unit is a start time unit in the most recent transmission of the transmitting device.
  • the first bandwidth and the second bandwidth both occupy four frequency domain units 1 to 4.
  • the transmitting device transmits one or more data packets to the receiving device through the frequency domain units 1 to 4 in the reference time unit k, and subsequently receives HARQ based on one or more data packets from the receiving device.
  • the transmitting device may determine the contention window CW size of the second bandwidth by referring to the HARQ of the data packets of the frequency domain units 1 to 4 in the time unit. As shown in FIG. 12, the transmitting device randomly selects one frequency domain unit to perform LBT based on CW.
  • the transmitting device performs non-random backoff based transmission on the frequency domain units 1, 2 and 4, and the transmitting device performs random backoff based transmission on the frequency domain unit 3.
  • other frequency domain units other than the frequency domain unit 3 may be randomly selected for random backoff.
  • the transmitting device since the channel is not contending, the transmitting device does not transmit data packets in the frequency domain units 3 and 4 at the reference time unit k, but transmits data packets in the frequency domain units 1 and 2.
  • the reference time unit is a start time unit of the last transmission of the transmitting device. Even if some of the frequency domain units fail to transmit a data packet within the start time unit, the transmitting device still uses it as a reference time unit to determine the contention window CW of the second bandwidth with reference to the HARQ of the data packet transmitted within the reference time unit. size. In other words, the transmitting device receives the HARQ of one or more data packets transmitted by the frequency domain units 1 and 2 to determine the contention window CW size of the second bandwidth.
  • the determining, by the step 304, the contention window CW size of the second bandwidth by referring to the HARQ of the one or more data packets comprises: determining, by reference to the HARQ of the one or more data packets sent in the multiple reference time units a contention window CW size of the bandwidth; wherein the HARQ of the one or more data packets includes: one or more transmitted in each of the plurality of reference time units that are closest to each frequency domain unit on the frequency domain unit that does not overlap HARQ for multiple packets.
  • the size of the CW window is determined with the HARQ information transmitted last time with respect to the frequency domain unit.
  • FIG. 14 differs from FIG. 13 in that the transmitting device does not transmit data packets in the frequency domain units 3 and 4 at the reference time unit k, but transmits data packets in the reference time unit k-n.
  • the transmitting device does not transmit data packets in the frequency domain units 3 and 4 at the reference time unit k, but transmits data packets in the reference time unit k-n.
  • the most recent transmission corresponds to the reference time unit kn, and therefore, the HARQ of the frequency domain units 3 and 4 can be based on the reference time unit kn
  • the transmission is determined. Since the frequency domain unit 1 transmits the data packets on the reference time units k-n and k, the frequency domain elements overlap in the portions of the reference time units k-n and k.
  • the frequency domain unit 1 the most recent transmission corresponds to the reference time unit k. Therefore, as shown in the figure, the portion of the frequency domain unit at the reference time kn will not be used to determine the contention window size (Fig. 14). The part that is not calculated is marked in the middle), and only the part of the reference time unit k is used to determine the contention window size.
  • a CW maintained by the transmitting device can also be applied to a large bandwidth, so that even if the second bandwidth is divided into a plurality of smaller frequency domain units, only LBT needs to be performed in a large bandwidth (ie, a second bandwidth).
  • the transmitting device can access the channel for transmission in multiple frequency domain units. It can be understood that, after the transmission device is successfully based on the large bandwidth LBT, how to divide the frequency domain unit is not specifically limited.
  • the above-mentioned large bandwidth LBT refers to performing CCA detection on the entire second bandwidth.
  • an LBT listening method for a transmitting device having multiple panels is also provided, the transmitting device including one or more antenna panels. Referring to FIG. 21, the method includes:
  • the sending device performs channel sensing on the one or more antenna panels
  • performing, by the sending device, channel sensing on one or more antenna panels includes: the sending device randomly selecting one of the one or more antenna panels to perform random backoff channel sensing.
  • only one contention window is maintained in the set of one or more antenna panels.
  • the one or more antenna panels each maintain an independent contention window.
  • the one or more antenna panels respectively correspond to one or more frequency domain units, and the one or more antenna panels refer to the one or more antenna panels when each of the independent contention windows is maintained Only one common contention window maintained in the set of one or more corresponding frequency domain units.
  • the one or more antenna panels respectively correspond to one or more frequency domain units, and the one or more antenna panels refer to the one or more antenna panels when each of the independent contention windows is maintained An independent contention window maintained by each of the corresponding one or more frequency domain units.
  • performing, by the sending device, channel sensing on one or more antenna panels includes: the transmitting device performing channel sensing separately in one or more antenna panels.
  • the network device can perform LBT on multiple antenna panels.
  • the plurality of antenna panels or multiple nodes may correspond to a scenario of multiple carriers/multi-subbands/multiple BWPs.
  • the LBT mechanism based on type A (including type A1 and type A2) can be applied to a multi-antenna panel or a multi-node scene.
  • each antenna panel independently completes the Cat 4 LBT, and each antenna panel has an independent contention window.
  • the type B type LBT is applied to the antenna panel, only one of the plurality of antenna panels performs the Cat 4 LBT, and the remaining antenna panels perform the Cat 2 LBT.
  • the type B1 type LBT between the plurality of antenna panels Only one contention window is maintained.
  • type B2 type LBT each antenna panel has an independent contention window.
  • the reference time unit for determining the contention window size at this time is the start time unit in the transmission of the HARQ feedback for each antenna panel.
  • the network device determines an update of the contention window size with reference to the foregoing embodiment.
  • multiple antenna panels maintain only one common contention window.
  • multiple antenna panels may have the same reference time unit, where the reference time unit refers to a start time unit in the transmission of the most recent HARQ feedback of the network device, according to the reference time unit
  • the HARQ of the data packets transmitted by each antenna panel determines the contention window size.
  • a part of the antenna panel may not be transmitted in the reference time unit, and the contention window size is determined according to the HARQ of the data packet transmitted by the antenna panel that is transmitted at the reference time unit.
  • the network device when the partial antenna panel fails to transmit, the network device also determines, as the reference time unit of the part of the antenna panel, the start time unit in the transmission of the last HARQ feedback for the part of the antenna panel.
  • the network device determines the contention window size by referring to the HARQ feedback of the data packets transmitted in the plurality of reference time units.
  • the plurality of antenna panels each have a reference time unit, and at this time, the reference time unit of each antenna panel is a start time unit in the transmission of the last HARQ of each antenna panel.
  • Each antenna panel confirms the respective CW size with reference to the HARQ feedback of the data packets transmitted in the respective reference time units.
  • the antenna panel that needs to perform Cat 4 LBT selects the largest CW value or the smallest CW value from the competition window of each antenna panel for LBT.
  • the random backoff number is determined through a common contention window.
  • the antenna panel 1 of the network device corresponds to the frequency domain units 1 and 2
  • the antenna panel 2 corresponds to the frequency domain units 3 and 4
  • the antenna panel 3 corresponds to the frequency.
  • Domain units 5 and 6 antenna panel 4 corresponds to frequency domain units 7 and 8.
  • one or more reference time units of the network device transmit one or more data packets to one or more receiving devices in frequency domain units 1-8, and refer to HARQ based on one or more data packets. Determine the size of the competition window. Wherein, if the reference time unit is a start time unit of the network device having the last HARQ feedback transmission, there is a reference time unit.
  • the reference time unit is the start time unit of the transmission in which the frequency domain units 1 to 8 have the last HARQ feedback, the one or more reference time units exist at this time because the LBT may not pass the relationship.
  • the initial value of the random backoff number can be determined according to the common contention window size of the network device.
  • the reference time unit is the first reference time unit corresponding to the most recent transmission on the current LBT process; or, in another possible implementation, the reference time unit is each frequency The start time unit of the most recent transmission corresponding to each of the domain units 1 to 8.
  • the antenna panel maintains CW1 ⁇ 4, and the common competition window is selected from CW1 ⁇ 4.
  • the largest competition window or the smallest competition window is selected as the initial value of the random backoff number.
  • the antenna panels CW1 to 4 can be obtained according to the frequency domain unit 1 or 2 corresponding to each antenna panel. Taking the antenna panel 1 as an example, it maintains the antenna panel CW1, the antenna panel CW1 is in the frequency domain 1 and 2 to the HARQ of one or more data packets in one or more time units, and determines the contention window size according to the feedback from the receiving device. .
  • the common contention window of the network device is the largest contention window CW of the antenna panels C1 to C4, which is the smallest contention window CW size, and the maximum or minimum of the plurality of frequency domain units corresponding to the competition windows of the antenna panels CW1 to 4 respectively.
  • the competition window is the largest contention window CW of the antenna panels C1 to C4, which is the smallest contention window CW size, and the maximum or minimum of the plurality of frequency domain units corresponding to the competition windows of the antenna panels CW1 to 4 respectively.
  • each antenna panel maintains an independent contention window.
  • For the contention window on each antenna panel it is determined according to the frequency domain unit 1 or 2 corresponding to each antenna panel.
  • the largest or smallest contention window CW of the frequency domain unit 1 or 2 is selected as the contention window CW of the corresponding antenna panel.
  • each antenna panel maintains an independent contention window.
  • For the contention window on each antenna panel there is a common contention window for the corresponding plurality of frequency domain units.
  • the above embodiments exemplarily illustrate various embodiments of the contention window management method in the present application, and embodiments of the network device and terminal in the present application will be exemplarily continued below.
  • the above sending device may be a network device or a terminal.
  • the network device is exemplarily explained.
  • the structure of the network device includes a processor and a transceiver.
  • a communication unit may be included in the structure of the network device for supporting communication between the network device and other network side devices, such as communication with a core network node.
  • a memory device can also be included in the structure of the network device, wherein the memory is coupled to the processor for storing program instructions and data necessary for the network device.
  • the network device may be a base station or other network side device having a base station function.
  • the network device includes a transceiver 1101, a processor 1102, a memory 1103, and a communication unit 1104.
  • the transceiver 1101, the processor 1102, the memory 1103, and the communication unit 1104 are connected by a bus.
  • data to be transmitted eg, PDSCH
  • signaling eg, PDCCH
  • the transceiver 1101 adjusts the signal received from the antenna and provides input samples.
  • the service data and the signaling message are processed, for example, data to be transmitted, SC-FDMA symbol generation, and the like. These units are processed according to the wireless access technologies employed by the radio access network (e.g., access technologies for LTE, 5G, and other evolved systems).
  • the transceiver 1101 is integrated by a transmitter and a receiver. In other embodiments, the transmitter and receiver may also be independent of each other.
  • the processor 1102 is further configured to perform control management on the network device to perform processing performed by the network device in the foregoing method embodiments, for example, to control network devices for downlink transmission and/or perform other processes of the techniques described herein.
  • the processor 1102 is configured to support a network device to perform the processing of the network device involved in FIGS. 2 through 26.
  • the processor 1102 also needs to control the network device for channel sensing for data or signaling transmission.
  • the processor 1102 performs channel sensing through signals received by the transceiver 1101 from the transceiver or antenna, and the control signals are transmitted via the antenna to preempt the channel.
  • the processor 1102 can include one or more processors, for example, including one or more central processing units (CPUs).
  • the processor 1102 can be integrated in the chip, or can be the chip itself. .
  • the memory 1103 is used to store related instructions and data, as well as program codes and data of the network device.
  • the memory 603 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), and an erasable programmable read only memory (Erasable Programmable Read). Only Memory, EPROM), or Compact Disc Read-Only Memory (CD-ROM).
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable Read Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • the memory 1103 is independent of the processor 1102. In other embodiments, the memory 1103 can also be integrated into the processor 1102.
  • Figure 27 only shows a simplified design of the network device.
  • the network device can include any number of transmitters, receivers, processors, memories, etc., and all network devices that can implement the present application are within the scope of the present application.
  • the structure of the terminal includes a processor (or controller), a transceiver, and a modem processor.
  • the structure of the terminal may further include a memory coupled to the processor for storing necessary program instructions and data of the terminal.
  • FIG. 28 shows a simplified schematic diagram of one possible design structure of the terminal involved in the above method embodiment.
  • the terminal includes a transceiver 1201, a processor 1202, a memory 1203 and a modem 1204, a transceiver 1201, a processor 1202, a memory 1203 and a modem 1204 connected by a bus.
  • the transceiver 1201 conditions (e.g., analog conversion, filtering, amplifying, upconverting, etc.) output samples and generates an uplink signal that is transmitted via an antenna to the network device in the above embodiments.
  • the antenna receives the downlink signal from the network device in the above embodiment.
  • Transceiver 1201 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples.
  • encoder 12041 receives traffic data and signaling messages to be transmitted on the uplink and processes (eg, formats, codes, and interleaves) the traffic data and signaling messages. .
  • Modulator 12042 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides the output samples described above.
  • Demodulator 12043 processes (e.g., demodulates) the above input samples and provides symbol estimates.
  • the decoder 12044 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the terminal.
  • Encoder 12041, modulator 12042, demodulator 12043, and decoder 12044 may be implemented by a composite modem processor 1204. These units are processed according to the radio access technologies employed by the radio access network (e.g., access technologies for LTE, 5G, and other evolved systems).
  • the transceiver 1201 is integrated by a transmitter and a receiver. In other embodiments, the transmitter and receiver may also be independent of one another.
  • the processor 1202 performs control management on the terminal, and is used to perform processing performed by the terminal in the foregoing method embodiment. For example, other processes for controlling the terminal for uplink transmission and/or the techniques described herein.
  • the processor 1202 is configured to support the terminal to perform the processing procedure in FIG. 2 to FIG. 26 in which the transmitting device is the terminal.
  • the transceiver 1201 is configured to control the antenna to receive signals for downlink transmission.
  • processor 1202 may include one or more processors, including, for example, one or more CPUs, which may be integrated into the chip or may be the chip itself.
  • the memory 1203 is used to store related instructions and data, as well as program codes and data of the terminal.
  • the memory 1203 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), and an erasable programmable read only memory (Erasable Programmable Read). Only Memory, EPROM), or Compact Disc Read-Only Memory (CD-ROM).
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable Read Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • the memory 1203 is independent of the processor 1202. In other embodiments, the memory 1203 can also be integrated into the processor 1202.
  • Figure 28 only shows a simplified design of the network device.
  • the network device can include any number of transmitters, receivers, processors, memories, etc., and all network devices that can implement the present application are within the scope of the present application.
  • the present application further provides a wireless communication device applied to a network device, the wireless communication device comprising a processor, the processor is configured to couple with the memory, and read an instruction in the memory according to the instruction.
  • the wireless communication device applied to the network device can be understood as a chip or chip device, and its memory is independent of the chip.
  • the present application further provides another wireless communication device for use in a network device, the wireless communication device comprising at least one processor and a memory, and a memory coupled to the at least one processor, at least A processor is used to perform the operations of the network devices involved in the various embodiments described above.
  • the wireless communication device applied to the network device can be understood as a chip or a chip device, and the memory thereof is integrated into the chip.
  • an embodiment of the present application further provides a wireless communication device applied to a terminal, the wireless communication device includes a processor, the processor is configured to be coupled to the memory, read an instruction in the memory, and according to the The instructions perform the operations of the terminals involved in the various embodiments described above.
  • the wireless communication device applied to the terminal can be understood as a chip or chip device, and its memory is independent of the chip.
  • an embodiment of the present application provides a wireless communication device applied to a terminal, the wireless communication device including at least one processor and a memory coupled to the at least one processor, at least A processor is used to perform the operations related to the terminals in the various embodiments described above.
  • the wireless communication device applied to the terminal can be understood as a chip or a chip device, and the memory thereof is integrated into the chip.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

L'invention concerne un procédé de gestion de fenêtre de contention appliqué à une bande de fréquences sans licence. Le procédé consiste à : envoyer, par un dispositif d'envoi, un ou plusieurs paquets de données à un ou plusieurs dispositifs de réception sur une ou plusieurs unités temporelles de référence, le ou les paquets de données occupant une première largeur de bande; recevoir, par le dispositif d'envoi, une demande de répétition automatique hybride (HARQ) du ou des paquets de données en provenance du ou des dispositifs de réception; et déterminer, par le dispositif d'envoi, la taille d'une fenêtre de contention (CW) d'une seconde largeur de bande en référence à la HARQ du ou des paquets de données. Le procédé selon la présente invention permet de déterminer une mise à jour d'une fenêtre de contention (CW) sur la base d'une rétroaction de HARQ d'un paquet de données, ce qui permet d'améliorer l'efficacité de communication.
PCT/CN2019/072869 2018-02-14 2019-01-23 Procédé de gestion de fenêtre de contention et dispositif d'envoi WO2019157919A1 (fr)

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US16/991,227 US11553531B2 (en) 2018-02-14 2020-08-12 Contention window management method and sending device

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CN201810152389 2018-02-14
CN201811031772.6A CN110166182B (zh) 2018-02-14 2018-09-05 一种竞争窗管理的方法及发送设备
CN201811031772.6 2018-09-05

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WO2021214709A1 (fr) * 2020-04-22 2021-10-28 Lenovo (Singapore) Pte. Ltd. Mise à jour d'une taille de fenêtre de contention
EP4089944A4 (fr) * 2020-02-14 2023-01-18 Samsung Electronics Co., Ltd. Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil

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EP4089944A4 (fr) * 2020-02-14 2023-01-18 Samsung Electronics Co., Ltd. Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil
EP4236168A3 (fr) * 2020-02-14 2023-09-20 Samsung Electronics Co., Ltd. Procédé et appareil de rétroaction de harq-ack dans un système de communication sans fil
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WO2021214709A1 (fr) * 2020-04-22 2021-10-28 Lenovo (Singapore) Pte. Ltd. Mise à jour d'une taille de fenêtre de contention

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