CN110366264B

CN110366264B - Method for adjusting contention window, network element equipment, user equipment and storage medium

Info

Publication number: CN110366264B
Application number: CN201910704396.0A
Authority: CN
Inventors: 张萌
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2021-04-02
Anticipated expiration: 2039-07-31
Also published as: CN110366264A

Abstract

The present disclosure relates to a contention window adjustment method, a network element device, a user device, and a storage medium, which are applied to a directional LBT scenario, and the method includes: and maintaining the numerical value of the downlink contention window in the direction of maintaining the contention window. By utilizing the embodiments of the disclosure, the maintenance of the competition window in the directional LBT scene can be realized.

Description

Method for adjusting contention window, network element equipment, user equipment and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a contention window adjustment method, a network element device, a user equipment, and a storage medium.

Background

In a Long Term Evolution (LTE) unlicensed spectrum, listening-Before-Talk (Listen Before Talk, LBT for short) channel monitoring is performed Before using an unlicensed spectrum (unlicensed), and the unlicensed spectrum can be accessed only if the channel is idle. The existing LBT monitoring is all omnidirectional monitoring, and a corresponding Contention Window (CW) is also maintained in omnidirectional. The prior art can not directionally maintain the competition window.

Disclosure of Invention

The disclosure provides a contention window adjustment method, a network element device, a user device and a storage medium. To enable contention window maintenance in a directional LBT scenario.

A first aspect of the present disclosure provides a contention window adjustment method applied to a directional LBT scenario, where the method includes:

and maintaining the numerical value of the downlink contention window in the direction of maintaining the contention window.

In one possible implementation, before maintaining the contention window value in the direction in which the contention window needs to be maintained, the method further includes:

and determining the direction of the contention window needing to be maintained.

In a possible implementation manner, the determining the direction of the contention window needing to be maintained includes:

determining the direction of the contention window needing to be maintained according to a predetermined direction, wherein the predetermined direction is determined by associating with a synchronization signal block SSB and/or a channel state information reference signal CSI-RS and/or a sounding reference signal SRS and/or a sounding reference signal TRS and/or a discovery reference signal DRS.

and determining the direction of the contention window needing to be maintained according to the direction corresponding to the uplink transmission fed back by the user equipment UE or the direction indicated by the user equipment UE.

In a possible implementation manner, the maintaining the downlink contention window value in the direction in which the contention window needs to be maintained includes:

and adjusting the value of the downlink contention window in the direction according to the channel transmission quality in the direction of the contention window needing to be maintained.

In a possible implementation manner, the maintaining, according to the requirement, the channel transmission quality in the contention window direction, and adjusting the downlink contention window value in the direction includes:

and adjusting the value of the downlink contention window in the direction according to HARQ feedback information of the PDSCH in the direction in which the contention window needs to be maintained in one or more reference time slots.

In a possible implementation manner, the adjusting, according to HARQ feedback information of a PDSCH in a direction in which a contention window needs to be maintained in one or more reference timeslots, a downlink contention window value in the direction includes:

and if the ratio of the negative acknowledgements in the HARQ feedback information exceeds a first preset ratio value, adjusting the value of the downlink contention window in the direction, and increasing the value to a next allowed higher preset value.

In one possible implementation manner, the one or more reference time slots are the latest one or more reference time slots in which the current network element device on the carrier has transmission, and a plurality of transmissions in the one or more reference time slots have corresponding HARQ-ACK feedback.

and adjusting the value of the downlink contention window in the direction according to the receiving result of the Physical Uplink Shared Channel (PUSCH) in the direction in which the contention window needs to be maintained in the preset time window.

In a possible implementation manner, the adjusting, according to a reception result of a PUSCH in a direction in which a contention window needs to be maintained within a preset time window, a value of a downlink contention window in the direction includes:

and if the ratio of unsuccessful PUSCH reception in the direction in which the contention window needs to be maintained in the preset time window exceeds a second preset ratio value, or the ratio of successful PUSCH reception in the direction in which the contention window needs to be maintained in the preset time window is lower than a fourth preset ratio value, adjusting the value of the contention window in the direction, and increasing to a next allowable higher preset value.

A second aspect of the present disclosure provides a contention window adjustment method applied to a directional LBT scenario, where the method includes:

maintaining the uplink contention window value in the direction in which the contention window needs to be maintained.

and determining the direction of the contention window needing to be maintained or the direction of the LBT needing to be sent after listening according to the direction indicated by the network element equipment.

In a possible implementation manner, the maintaining the uplink contention window value in the direction in which the contention window needs to be maintained includes:

and adjusting the uplink contention window value in the direction according to the channel transmission quality in the direction of the contention window required to be maintained.

In a possible implementation manner, the maintaining, according to the requirement, the channel transmission quality in the contention window direction, and adjusting the uplink contention window value in the direction includes:

and adjusting the uplink contention window value in the direction according to the condition of newly-transmitted uplink transmission in the direction in which the contention window needs to be maintained in one or more reference time slots.

In a possible implementation manner, the adjusting, according to a situation of newly-transmitted uplink transmission in uplink transmissions in a direction in which a contention window needs to be maintained in one or more reference timeslots, an uplink contention window value in the direction includes:

and if the uplink transmission is not newly transmitted, adjusting the uplink contention window value in the direction, and increasing to a next allowable higher preset value.

if there is at least one new uplink transmission in the uplink transmissions, adjusting the uplink contention window value in the direction to the minimum value among the allowed values.

In one possible implementation manner, the uplink transmission includes any one or both of an uplink shared channel UL-SCH and an uplink physical shared channel PUSCH.

In a possible implementation manner, the determining whether the uplink transmission is a new uplink transmission includes:

if the NDI in the HARQ process corresponding to the uplink transmission is overturned, determining that the uplink transmission is a newly transmitted uplink transmission;

and if the NDI in the HARQ process corresponding to the uplink transmission is not overturned, judging that the uplink transmission is not the newly transmitted uplink transmission.

In one possible implementation, the one or more reference slots include one or more of the following:

if the UE is in time slot n_gAfter receiving a UL grant, note n_wIs in time slot n_g-X index number of the timeslot where the UE last transmitted UL-SCH using CAT4 LBT;

if from time slot n₀Starting and in time slot n₀，n₁，…，n_wIf the middle UE transmits UL-SCH without gaps, n is determined₀Or from n₀The first K time slots are reference time slots, whereinThe value of K is configured by the network element equipment through a high-level signaling;

if from time slot n₀Starting and in time slot n₀，n₁，…，n_wIf the UE does not satisfy gapless transmission UL-SCH, n is determined_wOr from n_wFirst K time slots or from n_wBefore the initial calculation, K UEs adopt a time slot in which CAT4LBT transmits UL-SCH as a reference time slot, wherein the value of K is configured by network element equipment through high-level signaling.

In a possible implementation manner, the determining, according to a direction corresponding to an SSB and/or a CSI-RS indicated by a network element device, the direction of the contention window that needs to be maintained further includes:

receiving RRC and/or MAC-CE and/or DCI sent by network element equipment;

and determining the SSB and/or CSI-RS and/or SRS and/or TRS and/or DRS indicated by the network element equipment according to the RRC and/or MAC-CE and/or DCI.

A third aspect of the present disclosure provides a network element device, applied to a directional LBT scenario, where the network element device includes:

and the contention window adjusting module is configured to maintain the downlink contention window value in the direction in which the contention window needs to be maintained.

In a possible implementation manner, the network element device further includes:

and the direction determining module is used for determining the direction of the contention window needing to be maintained.

In one possible implementation, the direction determining module is configured to determine the direction of the contention window needing to be maintained according to a predetermined direction, where the predetermined direction includes being determined by associating with a synchronization signal block SSB and/or a channel state information reference signal CSI-RS and/or a sounding reference signal SRS and/or a sounding reference signal TRS and/or a discovery reference signal DRS.

In a possible implementation manner, the contention window adjusting module is configured to adjust the downlink contention window value in a direction of the contention window according to a channel transmission quality in the direction that needs to be maintained.

In a possible implementation manner, the direction determining module is configured to determine the direction of the contention window needing to be maintained according to a direction corresponding to uplink transmission fed back by the user equipment UE or according to a direction indicated by the user equipment UE.

In a possible implementation manner, the contention window adjusting module is further configured to adjust a value of a downlink contention window in a direction of the contention window according to HARQ feedback information of a PDSCH in the direction, where the contention window needs to be maintained, in one or more reference timeslots.

and if the ratio of the negative acknowledgements in the HARQ feedback information exceeds a first preset ratio value, adjusting the value of the downlink contention window in the direction, and increasing to a next allowed higher preset value.

In one possible implementation, the one or more reference slots are the latest one or more reference slots in which the base station has transmission on the current carrier, and multiple of the transmissions in the one or more reference slots have corresponding HARQ-ACK feedback.

In a possible implementation manner, the contention window adjusting module is further configured to adjust a value of a downlink contention window in a direction in which the contention window needs to be maintained according to a reception result of a physical uplink shared channel PUSCH in the direction within a preset time window.

A fourth aspect of the present disclosure provides a user equipment, for use in a directional LBT scenario, the user equipment comprising:

and the contention window adjusting module is configured to maintain the uplink contention window value in the direction in which the contention window needs to be maintained.

In one possible implementation manner, the user equipment further includes:

In a possible implementation manner, the user equipment further includes an indication receiving module, configured to receive an indication sent by the network element equipment;

the direction determining module is configured to determine, according to a direction indicated by the network element device, the direction in which the contention window needs to be maintained or the direction in which the LBT needs to be listened to before sent.

In a possible implementation manner, the contention window adjusting module is configured to adjust the uplink contention window value in a direction of the contention window according to a channel transmission quality in the direction that needs to be maintained.

In a possible implementation manner, the contention window adjusting module is further configured to adjust the uplink contention window value in a direction of the contention window according to a situation of newly transmitting uplink transmission in the direction that needs to be maintained in one or more reference timeslots.

and if at least one newly transmitted uplink transmission exists in the uplink transmissions, adjusting the uplink contention window value in the direction to be the minimum value in the allowed preset values.

if from time slot n₀Starting and in time slot n₀，n₁，…，n_wIf the middle UE transmits UL-SCH without gaps, n is determined₀Or from n₀The first K time slots are reference time slots, wherein the numerical value of K is configured by network element equipment through a high-level signaling;

In a possible implementation manner, the indication receiving module is configured to receive RRC and/or MAC-CE and/or DCI transmitted by a network element device;

the direction determination module is configured to determine, according to the RRC and/or MAC-CE and/or DCI, an SSB and/or CSI-RS and/or SRS and/or DRS and/or TRS indicated by the network element device.

A fifth aspect of the present disclosure provides a network element device, which is applied to a directional LBT scenario, where the network element device includes:

a transceiver;

a processor configured to perform the method of the first aspect of the present disclosure.

A sixth aspect of the present disclosure provides a user equipment, for use in a directional LBT scenario, the user equipment comprising:

a transceiver;

a processor configured to perform the method of the second aspect of the disclosure.

A seventh aspect of the present disclosure provides a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the first aspect of the present disclosure, the method of the first aspect of the present disclosure.

According to the embodiments provided by the aspects of the present disclosure, the downlink contention window value and the uplink contention window value may be maintained in the direction in which the contention window needs to be maintained. The direction of the contention window to be maintained corresponds to the LBT listening direction. In this way, directional contention window maintenance in a directional LBT scenario may be achieved.

Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a flowchart illustrating a contention window adjustment method according to an embodiment of the present disclosure.

Fig. 2 is a flowchart illustrating a contention window adjustment method according to another embodiment of the present disclosure.

Fig. 3 is a flowchart illustrating a contention window adjustment method according to an embodiment of the present disclosure.

Fig. 4 is a flowchart illustrating a contention window adjustment method according to another embodiment of the present disclosure.

Fig. 5 is a schematic block diagram illustrating a network element device according to an embodiment of the present disclosure.

Fig. 6 shows a schematic block diagram of an embodiment of a user equipment provided by the present disclosure.

Fig. 7 is a block diagram illustrating a user device 800 according to an example embodiment.

Figure 8 is a block diagram illustrating an apparatus 900 for a network element in accordance with an example embodiment.

Fig. 9 is a schematic diagram of a communication system according to an embodiment of the disclosure.

Detailed Description

Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.

The implementation provided in the embodiment of the present disclosure may be applied to a 5G (5generation) communication system, may also be applied to a 4G communication system, a 3G communication system, and may also be applied to various communication systems of subsequent evolution, such as 6G, 7G, and the like.

The disclosed embodiments are also applicable to different network architectures including, but not limited to, relay network architectures, dual link architectures, and Vehicle-to-event architectures.

The 5G CN in the embodiment of the present disclosure may also be referred to as a New Core (New Core), a 5G New Core, a Next Generation Core (NGC), or the like. The 5G-CN is set independently of an existing core network, such as an Evolved Packet Core (EPC).

The network element device in the embodiments of the present disclosure may be a Base Station (BS), which may also be referred to as a base station device, and is a device deployed in a radio access network to provide a wireless communication function. For example, the device providing the base station function in the 2G network includes a Base Transceiver Station (BTS) and a Base Station Controller (BSC), the device providing the base station function in the 3G network includes a node B (NodeB) and a Radio Network Controller (RNC), the device providing the base station function in the 4G network includes an evolved node B (eNB), the device providing the base station function in the Wireless Local Area Network (WLAN) is an access point (access point, AP), the device providing the base station function in the 5G New Radio (New Radio, NR) includes a node B (gnb) that continues to evolve, and the device providing the base station function in a future New communication system, etc.

User Equipment (ue) in the embodiments of the present disclosure may refer to various forms of access terminals, subscriber units, subscriber stations, Mobile Stations (MS), remote stations, remote terminals, Mobile devices, User terminals, terminal Equipment (terminal Equipment), wireless communication devices, User agents, or User devices. The user equipment may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a user equipment in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., which are not limited by the disclosed embodiments.

Fig. 9 is a schematic diagram of a communication system according to an embodiment of the present disclosure. The embodiments of the present disclosure may be applied to a communication system as shown in fig. 9. The embodiment of the disclosure defines a unidirectional communication link from an access network to User Equipment (UE) as a Downlink (DL), data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called as a downlink direction; the unidirectional communication link from the UE to the access network is uplink UL, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is referred to as uplink direction.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

"plurality" appearing in embodiments of the present disclosure means two or more. The descriptions of the first, second, etc. appearing in the embodiments of the present disclosure are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present disclosure, and do not constitute any limitation to the embodiments of the present disclosure.

The term "connect" in the embodiments of the present disclosure refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this respect.

The expression "network" and "system" appearing in the embodiments of the present disclosure are the same concept, and the communication system is a communication network. The term "connected" in the embodiments of the present disclosure refers to various connection manners, such as direct connection or indirect connection, for example, different devices are connected through a communication interface, and is not limited at all.

In a wireless communication system, antenna ports (ports for short) corresponding to resources occupied by two Reference signals (Reference signals, RS for short) or two channels or one Reference Signal and one channel are about a part of large-scale parameter Quasi-Co-site (Quasi-Co-Location, QCL for short, also called Quasi-Co-site), which indicates that the part of large-scale parameters of the channels of the two ports are the same. The large-scale parameters may include Average gain (Average gain), Average Delay (Average Delay), Delay spread (Delay spread), Doppler shift (Doppler shift), Doppler spread (Doppler spread), and Spatial reception parameter (Spatial receiving parameter), among others.

In nr (new radio), the beam direction is more indicated by Transmission Configuration Indicator (TCI) and spatiallationsinfo. A TCI is a list containing a number of elements, which may be referred to as TCI states. Different TCI states are represented using different TCI state formats. Currently, the TCI state format includes a single RS and a single QCL Type (e.g., { RS1| QCL-Type1}) and a combination of two RSs and two QCL types (e.g., { RS1| QCL-Type1, RS2| QCL-Type2 }). Wherein, RS1 and RS2 denote a source RS of QCL, and QCL-Type1 and QCL-Type2 denote QCL types.

QCL types defined by the 5G protocol are as follows: (1) the large-scale parameter components included in the QCL-TypeA comprise average time delay, time delay expansion, Doppler shift and Doppler expansion; (2) the large-scale parameters included in the QCL-TypeB comprise Doppler shift and Doppler expansion; (3) the large-scale parameter components included in the QCL-TypeC comprise average time delay and Doppler shift; (4) the QCL-type includes large scale parameter combinations of spatial receive parameters. Wherein QCL-typeD represents quasi co-site of spatial receiving parameters, which can be understood as a consistent relation of beam directions.

If the TCI state is associated with the target RS, it indicates that the source RS and the target RS are quasi co-sited with respect to the large-scale parameter in the QCL type. For example, the 5G protocol supports a TCI State { TRS #2| QCL-TypeB } and is associated with a target Channel State Information Reference Signal (CSI-RS), at which time the source RS TRS #2 and the CSI-RS are associated with a large scale parameter QCL contained by QCL-TypeB.

For another example, the 5G protocol supports a TCI state { TRS #2| QCL-type a, CSI-RS #5| QCL-type }, and is associated with a Physical Downlink Shared CHannel (PDSCH) DMRS. At this time, the TRS #2 and the DMRS are related to the large-scale parameter QCL included in QCL-type a, and the CSI-RS #5 and the DMRS are related to the large-scale parameter QCL included in QCL-type d.

For uplink transmission, the Spatial transmit parameter (Spatial transmitting parameter) is configured by the higher layer signaling of the Spatial relationship info. The SpatialRelationInfo may include an index number of the source RS, or an index number of a serving cell where the source RS is located, or a resource index number of the source RS, or an index number of a BWP where the source RS is located. Wherein the uplink transmission may be an SRS or a PUCCH. Wherein, the source RS can be CSI-RS or SSB or SRS or TRS or DRS.

For downlink transmission, the RS corresponding to QCL type-D in TCI-state can be used to indicate beam direction information. For uplink transmission, the RS corresponding to Spatialrelationinfo may be used to indicate beam direction information. The RS for indicating the direction may be a CSI-RS, an SSB, an SRS, a TRS, or a DRS.

The higher layer signaling described in the embodiments of the present disclosure may be RRC signaling or MAC-CE signaling, or other non-underlying signaling.

The "contention window" appearing in the embodiments of the present disclosure may be maintained independently for each channel access priority class of CAT4LBT, and all the schemes in the description are applicable to each level of channel access priority under CAT4 LBT.

The "direction of maintaining the contention window" appearing in the embodiment of the present disclosure may also be understood as a direction in which the UE or the network element device performs the LBT operation, and may be configured in a predefined or higher layer signaling indication or DCI indication manner. For example, the predefined manner may be that the UE or the network element device needs to maintain the contention window in all directions corresponding to the SSBs.

For another example, the base station may configure directions for performing LBT operation for the UE through a higher layer signaling indication or a DCI indication, and the UE needs to maintain contention windows in these directions respectively.

The "maintaining contention window" presented in the embodiments of the present disclosure may be understood as adjusting the contention window parameter configuration in LBT according to the actual transmission condition of the channel in some specific directions. Wherein different directions may correspond to different contention windows, which may be independent of each other. Alternatively, the base station may indicate, through higher layer signaling or DCI, which directions may maintain the same contention window, i.e. it means that the directions will use the contention window parameter configuration in the same LBT.

The "direction" or "beam direction" appearing in the embodiments of the present disclosure may be distinguished by spatial configuration (spatial configuration) of Reference Signal resources of any one or more of a channel state information Reference Signal (CSI-RS), a channel Sounding Signal (SRS), a Tracking Reference Signal (TRS), a synchronization Signal and broadcast channel Block (SS/PBCH Block, SSB), and a Discovery Reference Signal (DRS) indicated in TCI or higher layer signaling spatial relationship info. Note that the indication of "direction" or "beam direction" is not limited to the above reference signal according to the actual application scenario.

Specifically, the maintaining of the direction of the contention window may specifically be that the base station indicates a TCI state through higher layer signaling or DCI, where spatial configuration corresponding to the RS indicated by the QCL-type D may be used to configure the maintaining of the direction of the contention window. Namely, the base station performs the operation of LBT with the spatial receiving parameter of the RS indicated by the received QCL-type D. Or, the direction for maintaining the CW may specifically be that the base station indicates an RS through higher layer signaling spatial relationship info or DCI, where the spatial configuration corresponding to the RS may be used to maintain the configuration of the direction of the contention window. That is, the base station performs the operation of LBT with the spatial receiving parameter received from the RS.

Alternatively, "direction" or "beam direction" may be considered the same.

The "direction of the contention window" appearing in the embodiments of the present disclosure and the direction of the LBT by the UE may be considered to be identical. Alternatively, the "direction of the contention window" and the direction of the UE's next uplink transmission may be considered to be identical.

The CAT4LBT presented in the embodiments of the present disclosure may describe that a device needs to select a backoff counter (backoff counter) before accessing a channel, where the backoff counter is an integer that satisfies a certain interval. And then, whether the channel is free or busy is monitored and judged. The back-off count may be decremented by 1 if the channel is in an idle state, and otherwise its value is maintained. The device may not transmit until the back-off count has a value of 0.

In the related art, in an omni-directional LBT or non-directional LBT scenario, there may be two following ways for maintaining a downlink Contention Window value CWS (CWS):

the first way is to adjust the downlink CWS in case of downlink physical shared channel PDSCH scheduled by downlink physical control channel PDCCH, if the network element device gNB uses LBT with LBT priority class p to transmit PDSCH on one carrier CC, the gNB may maintain CWS before LBT according to the following 2 steps:

s1, if any p belongs to {1,2,3,4}, then CWp ═ CWmin, p is set.

S2, if there is 80% PDSCH corresponding HARQ-ACK NACK in the reference slot, then adjust the CW corresponding to p to the next larger value and leave it at S2, otherwise go to S1. The definition of Reference subframe k is the last DL transmission of the gNB on this CC while ensuring that at least the gNB can find some corresponding HARQ-ACK feedback. The CW adjusted for reference slot k, that is, the HARQ-ACK value of the same reference slot, is used to adjust the CWs once, and when the adjustment value of the CW reaches the maximum value CWmax, p, the next adjustment value is CWmax, p.

For the determination of Z value, if the PDSCH transmitted by the gNB is in the second slot (indicating that a partial subframe is used) of the reference subframe k, the HARQ-ACK corresponding to the PDSCH transmitted by the subsequent subframe k +1 is also calculated in the statistics of Z. If it is not cross-carrier scheduling, if the base station does not receive HARQ-ACK corresponding to PDSCH or the gNB recognizes it as "DTX", "NACK/DTX", "any", then these shall be all denoted as NACK. If the scheduling is cross-carrier scheduling, if the gNB receives HARQ-ACK and the HARQ-ACK is NACK/DTX or any, the HARQ-ACK is marked as NACK at the moment; if it is "DTX," then the gNB should ignore this; if cross-carrier scheduling is performed, if the gNB does not detect any HARQ-ACK for the PDSCH, if the UE uses PUCCH format1b and "NACK/DTX" is detected, it should be noted as NACK, and if "DTX" is detected, the gNB should ignore this; otherwise, HARQ-ACK should be ignored.

If there are 2 codewords for PDSCH, HARQ-ACK for each Codeword is calculated separately. For M subframes using HARQ bundle, it shall be noted as M HARQ-ACK responses.

The second way is to adjust the CWS without PDCCH scheduled PDSCH, if the gNB does not send PDCCH with PDSCH scheduled (format 0A/0B/4A/4B) starting at time t0, then the gNB needs to maintain the size of the CW before LBT in the following 2 steps:

s1, if any p belongs to {1,2,3,4}, then CWp ═ CWmin, p is set.

S2, if less than 10% of UL TBs using CAT2 are not successfully transmitted within the interval [ t0, t0+ Tco ], then the CW corresponding to p is adjusted to the next larger value and left in S2, otherwise go to S1. If CW is CWmax, p has been used K times in succession for generating Ninit, when CW is set to CWmin, p. K is {1,2, …,8}, where each priority class has a separate value of K.

In the related art, in the maintenance of the uplink contention window value CWS, if the UE uses LBT transmission with CAT4priority class p on one CC, the UE needs to maintain the CWS before LBT according to the following procedure:

s1, if at least one NDI of the HARQ processes associated with the HARQ _ ID _ ref is flipped, CW ═ CWmin, p.

S2, otherwise (NDI of all HARQ processes is not flipped), the CW corresponding to p is adjusted to the next larger value.

Wherein, the HARQ _ ID _ ref is a HARQ-ID corresponding to the UL-SCH in the reference subframe nref. nref is defined as follows:

if the UE receives a UL grant at subframe ng, subframe nw is the last time the UE has used CAT4LBT for UL-SCH transmission before subframe ng-3, note n0, n1, …, nw.

If starting at n0 and the UE continues to transmit UL-SCH without gap in n0, n1, …, nw, this time nref is n 0. Otherwise, nw is nref.

Wherein, if the UE is scheduled in n0, n1, …, nw-1 without gap to continuously transmit UL-SCH with CAT4LBT and the UE cannot transmit anything in these subframes (e.g. LBT failure), the UE may keep CW unchanged.

The UE may keep the CW unchanged at this time if nref for the last scheduled transmission of the UE is the same as nref corresponding to the currently scheduled transmission.

If CW is already equal to CWmax, p, then the next high value adjustment is again CWmax, p.

If CW is CWmax, p has been used K times in succession for generating Ninit, when CW is set to CWmin, p. K is {1,2, …,8}, where each priority class has a separate value of K.

Considering that with the development of 5G, especially in the high frequency communication scenario, in order to resist path loss (pathloss), directional transmission may be adopted for transmission. Correspondingly, the listening rules may also be changed to listen only in one or more directions. In contrast, the embodiment of the present disclosure proposes the following possible CW window maintenance schemes under the directional LBT procedure for the change of the maintenance rule of the CW window corresponding to the LBT after the introduction of the directional LBT in the future.

Fig. 1 is a flowchart illustrating a contention window adjustment method according to an embodiment of the present disclosure. As shown in fig. 1, the method may be applied to a network element device in a directional LBT scenario, and is specifically described from a network element device side, where the method may include:

s110: in the direction of needing to maintain the Contention Window (Contention Window), maintain the downstream Contention Window value (CWS).

The direction in which the CW needs to be maintained corresponds to the listening direction of the directional LBT, which may be determined by the network element device itself or according to a predefined direction or a direction indicated by the UE. The direction indicated by the UE may be a direction in which the UE performs uplink transmission, and then the base station needs to perform an LBT procedure in the direction next, and maintain a contention window value in the direction; alternatively, the direction indicated by the UE may be the corresponding direction for the base station to perform LBT next, in which the base station will maintain the contention window value. Optionally, the transmission of the UE sending direction indication information may be in a COT with the downlink transmission of the base station.

For example, in a COT initialized by a UE, the UE may indicate, to the network element device, the direction information of uplink transmission by the UE through UCI or higher layer signaling. Then, the same COT internal network element device can perform LBT monitoring in the direction. Once the LBT success requirements are met, information may be sent in the corresponding direction.

In one possible implementation manner of the present disclosure, the base station may independently maintain the value of the contention window in all or part of the downlink transmission directions scheduled by the base station. Optionally, a Timer (Timer) may be defined, which is started when downlink transmission is scheduled in a certain direction by the base station, and the value of the contention window may be set to the minimum value in the selectable set. During the time that the timer is valid, the corresponding contention window value may be maintained in accordance with the implementations described in other embodiments. If the base station does not schedule the downlink transmission in the same direction again until the timer expires, the contention window value corresponding to the direction may be reset to the minimum value in the optional set or the contention window value for maintaining the direction may be abandoned.

In a possible implementation manner of the present disclosure, the base station may maintain the index number of the reference signal corresponding to the direction of the contention window value and notify the UE through a high-level signaling or a dynamic signaling.

In one possible implementation manner of the present disclosure, the base station may maintain the values of the independent contention windows in all or part of the directions corresponding to the SSBs. Optionally, the base station may notify the UE of the index numbers of the reference signals in the corresponding directions through high layer signaling or dynamic signaling. In one possible implementation manner of the present disclosure, the base station may maintain the values of the independent contention windows in the directions corresponding to all or part of the SSBs, all or part of the CSI-RS, all or part of the DRSs, all or part of the TRSs, and all or part of the SRS. Optionally, the base station may notify the UE of the index numbers of the reference signals in the corresponding directions through high layer signaling or dynamic signaling.

In another possible implementation manner of the present disclosure, the base station may maintain a contention window value by taking as a whole one direction corresponding to one of the following reference signals or a plurality of directions corresponding to a plurality of the same or different reference signals:

1.SSB；

2.CSI-RS；

3.TRS；

4.SRS；

5.DRS。

the base station may maintain a plurality of contention window values corresponding to a plurality of reference signal sets. Optionally, the base station may inform the UE of the reference signal sets through higher layer signaling or dynamic signaling.

In an example of the present disclosure, the reference signal may be any one or more of a channel state information reference signal CSI-RS, a synchronization signal block SSB, an uplink channel quality measurement SRS, a tracking reference signal TRS, and a discovery reference signal DRS. Of course, in other examples of the present disclosure, the reference signal RS may also be other reference signals that can indicate a direction, which is not limited by the present disclosure.

In a possible implementation manner of the present disclosure, in a direction in which a contention window CW needs to be maintained, maintaining a downlink contention window value CWs may include:

and adjusting the downlink CWS in the direction of the CW according to the channel transmission quality in the direction needing to be maintained.

In a possible implementation manner of the present disclosure, the Channel transmission quality in the direction in which the CW needs to be maintained may be determined according to a transmission success condition of a Downlink Physical Shared Channel (PDSCH) or an Uplink Physical Shared Channel (PUSCH) in the direction. Wherein the direction of the PDSCH or PUSCH and the maintenance CW may be quasi co-sited or quasi co-sited with respect to QCL type or associated with the same QCL. If the channel transmission quality in a direction in which the CW needs to be maintained cannot meet the predetermined channel transmission quality standard, i.e., the channel transmission quality is not good enough, the value of the downlink contention window in the direction is adjusted to a larger value. In some possible implementations of the present disclosure, if the CWS is already a maximum value, the CWS is maintained unchanged.

In one possible implementation manner of the present disclosure, the channel transmission quality may be determined according to a condition of negative acknowledgement NACK in HARQ-ACK of HARQ feedback information of a PDSCH. Specifically, for the PDSCH scheduled by the downlink physical control channel PDCCH, maintaining the channel transmission quality in the CW direction as needed, and adjusting the downlink CWs in the CW direction may include:

and adjusting the CWS in the direction according to HARQ-ACK of a Physical Downlink Shared Channel (PDSCH) in the direction in which a contention window needs to be maintained in one or more reference slot (reference slot) slots.

In a possible implementation manner of the present disclosure, the reference time slot is used to count the percentage of NACKs or ACKs in all HARQ-ACKs corresponding to uplink or downlink transmission on the time slot, and the CWS is adjusted based on the percentage. Or the reference time slot is used for counting the turning condition of the NDI of the HARQ process corresponding to the uplink or downlink transmission on the time slot, and the CWS is adjusted according to the turning condition.

In a possible implementation manner of the present disclosure, the one or more reference slots may be the latest one or more reference slots that the base station has transmitted on the current carrier, and it may have at least some corresponding HARQ-ACK feedback. When the configuration of multiple reference slots is adopted, the specific number of slots may be configured by higher layer signaling or in a predefined manner.

Due to the fact that PDCCH scheduling is adopted, each PDSCH has corresponding feedback information HARQ-ACK to be fed back to the network element equipment, and the network element equipment can adjust the CWS in the direction according to the NACK ratio in the HARQ-ACK of the PDSCH in one or more preset slots.

Specifically, in a possible implementation manner of the present disclosure, if the ratio of NACKs in the HARQ-ACK in the direction in which the CW needs to be maintained exceeds a first preset ratio value, the value of the downlink contention window in the direction is adjusted, and the value is increased to a next higher preset value.

The first preset ratio value may be determined according to the specific requirement of the channel transmission quality, for example, the first preset ratio value may be set to 80%, that is, if the ratio exceeds 80%, the downlink CWS in the direction is adjusted to increase to a next larger preset value. Of course, the specific value of the first preset ratio is not limited in the present disclosure. In addition, the first preset ratio value may also be configured by the base station through higher layer signaling.

The specific way of adjusting the downlink contention window value in the direction to increase to the next higher preset value may be to adjust the CWS to the next higher value of the current CWS in the selectable value set. For example, in one implementation of the present disclosure, the selectable set of values for CW is {1,2,3,4,8,16 }. The current CWS is 4 and if the ratio of NACKs in the HARQ-ACK exceeds the first predetermined ratio value, the CWS is adjusted to the next larger value in the set of selectable values, i.e. to 8. Of course, if the current CWS is already the largest value in the selectable set of values, the current CWS is maintained.

In a possible implementation manner of the present disclosure, the network element device may classify the HARQ-ACK according to RS of QCL _ typeD indicated by TCI state of PDSCH within reference slot(s). In the reference slot, the PDSCHs in the beam direction are selected, and the NACK ratios z (i) in the respective directions are independently counted. Where i represents all beam directions in which the UE needs monitor, each of which needs to maintain an independent CW value. If 80% of the PDSCH transmissions in one direction have HARQ-ACK NACKs, the CW is adjusted to the next larger value.

In some possible implementations of the present disclosure, the number of beam directions in which CWs need to be maintained may be reduced, for example, only the number of SSBs is used as the number of beam directions in which CWs need to be maintained, or CW is maintained by fixing several beam directions in a manner predetermined or configured by another base station. These beam directions, which require maintenance of CW, can be configured to the UE through higher layer signaling. The UE needs to maintain respective CW values in these directions accordingly.

In addition, it may also be set that only HARQ-ACKs of a PDSCH that is the same QCL-type D RS (or QCL, quasi co-located) can be counted together. The direction in which the CW needs to be maintained may be counted, for example, in the form of CW-1(SSB-1), CW-2 (SSB-2). Wherein, if the RS of QCL-type D in the TCI-state corresponding to the PDSCH is a CSI-RS and it is quasi co-sited (QCL) with another SSB, its corresponding HARQ-ACK count can be accumulated into the CW corresponding to the SSB of its QCL.

In another possible implementation manner of the present disclosure, the channel transmission quality may be determined according to a negative acknowledgement NACK condition in HARQ-ACK of HARQ feedback information of PUSCH. Specifically, for a PDSCH without PDCCH scheduling, maintaining channel transmission quality in a contention window direction as needed, and adjusting a downlink CWS in the direction may include:

and adjusting the downlink CWS in the direction according to the PUSCH receiving result in the direction in which the contention window needs to be maintained in the preset time window. And adjusting the PUSCH of the CWS according to the receiving result, wherein the PUSCH of the CWS should be the PUSCH with the direction matched with the direction of the contention window needing to be maintained. The direction of the PUSCH and the direction of the maintenance contention window may be the same or the directions of the PUSCH and the maintenance contention window may be quasi co-sited or the directions of the PUSCH and the LBT may satisfy the quasi co-sited relation of QCL-type D.

Since the network element device can directly obtain the result of success or failure of reception of the PUSCH, in a possible implementation manner of the present disclosure, the CWS in the direction may be adjusted according to the NACK ratio in the HARQ-ACK of the PUSCH within a preset time window. Specifically, if the ratio of unsuccessful PUSCH reception in the direction in which the contention window needs to be maintained in the preset time window exceeds a second preset ratio value, or the ratio of successful PUSCH reception in the direction in which the contention window needs to be maintained in the preset time window is lower than a fourth preset ratio value, the contention window value in the direction is adjusted, and the contention window value is increased to a next higher preset value. Wherein, the preset time window can be configured by high layer signaling or given in a predefined manner.

In a possible implementation manner of the present disclosure, a receiving result of a PUSCH may be determined according to feedback information HARQ-ACK of a PUSCH from a network element device, and correspondingly, if a ratio of NACK in the HARQ-ACK exceeds a second preset ratio value, a preset value is increased by adjusting a CWS in the direction. The second preset ratio value and the fourth preset ratio value may be determined according to the specific requirement of the channel transmission quality, for example, the second preset ratio value may be set to 10%, that is, if the ratio exceeds 10%, the downlink CWS in the direction is adjusted to be increased to a next higher preset value. Of course, the specific value of the second predetermined ratio is not limited in this disclosure. The direction of the PUSCH and the direction of the maintenance contention window may be the same or the directions of the PUSCH and the maintenance contention window may be quasi co-sited or the directions of the PUSCH and the LBT may satisfy the quasi co-sited relationship of QCL-type D.

The specific way of adjusting the downlink CWS in the direction to increase the preset value may be to adjust the CWS to a next larger value of the current CWS in the selectable value set. For example, in one implementation of the present disclosure, the selectable set of values for the contention window is {1,2,3,4,8,16 }. The current CWS is 4 and if the ratio of NACKs in the HARQ-ACK exceeds the first predetermined ratio value, the CWS is adjusted to the next larger value in the set of selectable values, i.e. to 8. Of course, if the current CWS is already the largest value in the selectable set of values, the current CWS is maintained.

In a possible implementation manner of the present disclosure, a receiving result of a PUSCH may be determined according to feedback information HARQ-ACK of a PUSCH from a network element device, and correspondingly, if a ratio of ACK in the HARQ-ACK is lower than a second preset ratio value, a preset value is increased by adjusting a CWS in the direction. The first preset ratio value may be determined according to the specific requirement of the channel transmission quality, for example, the second preset ratio value may be set to 90%, that is, if the ratio is lower than 90%, the downlink CWS in the direction is adjusted to be increased to a next higher preset value. Of course, the specific value of the second predetermined ratio is not limited in this disclosure. The direction of the PUSCH and the direction of the maintenance contention window may be the same or the directions of the PUSCH and the maintenance contention window may be quasi co-sited or the directions of the PUSCH and the LBT may satisfy the quasi co-sited relationship of QCL-type D.

Fig. 2 is a flowchart illustrating a contention window adjustment method according to another embodiment of the present disclosure. Specifically, as shown in fig. 2, the method may be applied to a network element device in a directional LBT scenario, and is specifically described from a network element device side, where the method may include:

s210: a direction in which a contention window needs to be maintained is determined.

In a possible implementation manner of the present disclosure, the direction of the contention window needing to be maintained may be determined according to a predetermined direction. Or determining the direction of the contention window needing to be maintained according to the direction of a channel or RS to be transmitted next.

Specifically, reference signals such as SSB, CSI-RS, SRS, DRS, TRS, and the like may be used to indicate the direction of LBT, and in the embodiment of the present disclosure, any one or how many indicated directions of reference signals such as SSB, CSI-RS, SRS, DRS, TRS, and the like may be used as the direction of maintaining the contention window, so that contention window adjustment in a directional LBT scenario may be implemented.

S220: and maintaining the CWS of the downlink LBT in the direction of the contention window needing to be maintained.

and adjusting the CWS of the downlink LBT in the direction according to the channel transmission quality in the direction of the contention window needing to be maintained.

In a possible implementation manner of the present disclosure, the channel transmission quality in the direction in which the contention window needs to be maintained may be determined according to a transmission success condition of a downlink physical shared channel PDSCH or an uplink physical shared channel PUSCH in the direction. If the channel transmission quality in a direction in which the contention window needs to be maintained cannot meet the predetermined channel transmission quality standard, that is, the channel transmission quality is not good enough, the value of the downlink contention window in the direction is adjusted to a larger value.

In one possible implementation manner of the present disclosure, the channel transmission quality may be determined according to a condition of negative acknowledgement NACK in HARQ-ACK of HARQ feedback information of a PDSCH. Specifically, for the PDSCH scheduled by the downlink physical control channel PDCCH, maintaining the channel transmission quality in the direction of the contention window as needed, and adjusting the downlink CWS in the direction may include:

and adjusting the CWS in the direction according to the HARQ-ACK of the PDSCH in the direction of needing to maintain the contention window in one or more reference time slots.

In a possible implementation manner of the present disclosure, the one or more time slots may be the latest one or more reference time slots that the base station has transmitted on the current carrier, and it can have at least some corresponding HARQ-ACK feedback. When the configuration of multiple reference slots is adopted, the specific number of slots may be configured by higher layer signaling or in a predefined manner.

Due to the fact that PDCCH scheduling is adopted, each PDSCH has corresponding feedback information HARQ-ACK to be fed back to the network element equipment, and the network element equipment can adjust the CWS in the direction according to the NACK ratio in the HARQ-ACK of the PDSCH in one or more preset time slots.

Specifically, in a possible implementation manner of the present disclosure, if the ratio of NACKs in the HARQ-ACK in the direction in which the contention window needs to be maintained exceeds a first preset ratio value, the downlink CWS in the direction is adjusted to increase a preset value. The first preset ratio value may be determined according to the specific requirement of the channel transmission quality, for example, the first preset ratio value may be set to 80%, that is, if the ratio exceeds 80%, the downlink CWS in the direction is adjusted to be increased to a next higher preset value allowed. Of course, the specific value of the first preset ratio is not limited in the present disclosure.

In a possible implementation manner of the present disclosure, the network element device may classify the HARQ-ACK according to RS of QCL _ typeD indicated by TCI state of PDSCH within reference slot(s). In the reference slot, the PDSCHs in the same beam direction are selected, and the NACK ratios z (i) in the respective directions are independently counted. Where i represents the ith beam direction in which the UE needs monitor, and in these directions, each needs to maintain an independent contention window value. If 80% of the PDSCH transmissions in one direction have HARQ-ACK NACKs, the contention window is adjusted to the next larger value. If the CWS is already at the maximum, it remains unchanged.

In some possible implementations of the present disclosure, the number of beam directions in which contention windows need to be maintained may be reduced, for example, only the number of SSBs is used as the number of beam directions in which contention windows need to be maintained, or several beam directions are fixed by means of predefined or higher layer signaling configuration for maintaining CW.

In addition, it may also be set that only HARQ-ACKs of the PDSCH of the same QCL-type D RS (or QCL) can be counted together. The direction in which the contention window needs to be maintained may be counted, for example, in the form of CW-1(SSB-1), CW-2 (SSB-2). Wherein, if the RS of QCL-type D in the TCI-state corresponding to the PDSCH is a CSI-RS and it is quasi co-located (QCL) with another SSB, it can be considered to accumulate its corresponding HARQ-ACK count into the contention window corresponding to the SSB of its QCL.

and adjusting the downlink CWS in the direction according to the HARQ-ACK of the PUSCH in the direction in which the contention window needs to be maintained in the preset time window.

Since the network element device can directly obtain the result of success or failure of reception of the PUSCH, in a possible implementation manner of the present disclosure, the CWS in the direction may be adjusted according to the NACK ratio in the HARQ-ACK of the PUSCH within a preset time window.

In a possible implementation manner of the present disclosure, if the NACK ratio in the HARQ-ACK exceeds a second preset ratio value, the CWS in the direction is adjusted to increase a preset value. If the CWS is already at the maximum, it remains unchanged. The first preset ratio value may be determined according to the specific requirement of the channel transmission quality, for example, the second preset ratio value may be set to 10%, that is, if the ratio exceeds 10%, the downlink CWS in the direction is adjusted to increase to a next larger preset value. Of course, the specific value of the first preset ratio is not limited in the present disclosure. In addition, the second preset ratio value may also be configured by the network element device through higher layer signaling.

In a possible implementation manner of the present disclosure, a receiving result of a PUSCH may be determined according to feedback information HARQ-ACK of a PUSCH from a network element device, and correspondingly, if a ratio of ACK in the HARQ-ACK is lower than a second preset ratio value, a preset value is increased by adjusting a CWS in the direction. The first preset ratio value may be determined according to the specific requirement of the channel transmission quality, for example, the second preset ratio value may be set to 90%, that is, if the ratio is lower than 90%, the downlink CWS in the direction is adjusted to be increased to a next higher preset value. Of course, the specific value of the second predetermined ratio is not limited in this disclosure.

The specific way of adjusting the downlink CWS in the direction to increase the preset value may be to adjust the CWS to a next larger value of the current CWS in the selectable value set. For example, in one implementation of the present disclosure, the selectable set of values for the contention window is {1,2,3,4,8,16 }. The current CWS is 4 and if the ratio of NACKs in the HARQ-ACK exceeds the first predetermined ratio value, the CWS is adjusted to the next larger value in the set of selectable values, i.e. to 8. Of course, if the current CWS is already the maximum value in the selectable set of values, the current CWS is maintained unchanged

Fig. 3 is a flowchart illustrating a contention window adjustment method according to another embodiment of the present disclosure. As shown in fig. 3, the method may be applied to a user equipment UE in a directional LBT scenario, and is specifically described from the UE side, the method may include:

s310: in the direction of needing to maintain the Contention Window, maintaining the uplink Contention Window value (CWS).

In a possible implementation manner of the present disclosure, the UE may respectively maintain different CWSs according to a channel access priority of CAT4LBT corresponding to uplink transmission. Possible implementation manners of the disclosure are applicable to the scenarios under different channel access priorities of CAT4 LBTs.

In a possible implementation manner of the present disclosure, the direction of the contention window may also be understood as a direction in which the user or the base station performs directional LBT or a direction in which the user performs transmission after performing directional LBT. In a possible implementation manner of the present disclosure, the UE may determine the direction of the contention window to be maintained according to a predefined direction, or may determine the direction of the contention window to be maintained or the direction of the LBT to be listened to before sent according to the direction indicated by the network element device. Wherein, the direction of LBT and the direction of the contention window needing to be maintained may be the same. The direction may be determined by associating with one or more reference signals, for example, the reference signals may be Synchronization Signal Blocks (SSBs) and/or channel state information reference signals (CSI-RS) and/or Sounding Reference Signals (SRS) and/or sounding reference signals (TRS) and/or Discovery Reference Signals (DRS). The network element device may indicate, through a high-level signaling or DCI, a direction in which the UE needs to maintain the contention window.

In one possible implementation manner of the present disclosure, the UE may independently maintain the value of the contention window in all or part of uplink transmission directions scheduled by the base station. Optionally, a Timer (Timer) may be defined, which is started when the uplink transmission is scheduled in a certain direction by the base station, and the UE may set the value of the contention window to the minimum value in the selectable set. During the time that the timer is valid, the UE may maintain the corresponding contention window value according to the implementation described in other embodiments. If the base station does not schedule uplink transmission in the same direction again until the timer expires, the UE may reset the contention window value corresponding to the direction to the minimum value in the optional set or abandon maintaining the contention window value in the direction.

In a possible implementation manner of the present disclosure, the UE may maintain the values of the independent contention windows in the directions corresponding to all or part of the SSBs in a predefined manner.

In one possible implementation manner of the present disclosure, the UE may maintain, in a predefined manner, values of independent contention windows in directions corresponding to all or part of SSBs, or all or part of CSI-RS, or all or part of DRSs, or all or part of TRSs, or all or part of SRS.

In another possible implementation manner of the present disclosure, the UE may maintain a contention window value by taking, as a whole, a direction corresponding to one reference signal or a plurality of directions corresponding to a plurality of same or different reference signals:

1.SSB；

2.CSI-RS；

3.TRS；

4.SRS；

5.DRS。

the UE may maintain a plurality of contention window values corresponding to a plurality of reference signal sets.

In a possible implementation manner of the present disclosure, the base station may notify the UE through a high-level signaling or a dynamic signaling that the UE needs to maintain the value of the independent contention window in all or part of the directions corresponding to the SSBs.

In a possible implementation manner of the present disclosure, the base station may notify, through high-level signaling or dynamic signaling, that the UE needs to maintain the value of the independent contention window in the directions corresponding to all or part of the SSBs, all or part of the CSI-RSs, all or part of the DRSs, all or part of the TRSs, and all or part of the SRS.

In another possible implementation manner of the present disclosure, the base station informs, through high-level signaling or dynamic signaling, the UE to maintain a contention window value by taking a direction corresponding to one of the following reference signals or a plurality of directions corresponding to a plurality of the same or different reference signals as a whole:

1.SSB；

2.CSI-RS；

3.TRS；

4.SRS；

5.DRS。

the UE may maintain a plurality of contention window values corresponding to a plurality of reference signal sets. In a possible implementation manner of the present disclosure, the channel transmission quality in the direction of the contention window may be maintained as needed, and the uplink CWS in the direction may be adjusted. The channel transmission quality may use the transmission success rate of the PUSCH as a decision criterion.

In a possible implementation manner of the present disclosure, the UE may adjust the uplink CWS in the direction according to a condition of newly-transmitted uplink transmission in the direction in which the contention window needs to be maintained in one or more reference slot slots. And if no new uplink transmission exists in the uplink transmission, adjusting the uplink contention window value in the direction, and increasing to a next allowable higher preset value. If the contention window is already at the maximum value, it remains unchanged.

Further, if at least one new uplink transmission is transmitted in the uplink transmissions, the uplink contention window value in the direction is adjusted to the minimum value among the allowed preset values.

Further, since the UE may receive the HARQ-ACK corresponding to the uplink transmission, the HARQ-ACK may be used to determine a situation of a newly transmitted uplink transmission in the uplink transmission, that is, may be used to determine the channel transmission quality. If the ratio of NACK in HARQ-ACK reaches a fourth preset ratio, the fourth preset ratio value may be determined according to the specific requirement of channel transmission quality, for example, the fourth preset ratio value may be set to 10%, that is, if the ratio exceeds 10%, the downlink CWS in the direction is adjusted to be increased to a next larger preset value. Of course, the specific value of the fourth predetermined ratio is not limited in this disclosure. In addition, the fourth preset ratio value may also be configured by the network element device through high-layer signaling.

In the various implementations, the uplink transmission may be any one or more of an uplink shared channel UL-SCH and an uplink physical shared channel PUSCH.

In an implementation manner of the present disclosure, a determination manner of whether the uplink transmission is a newly transmitted uplink transmission may include:

In one possible implementation manner of the present disclosure, the one or more reference time slots may be determined in the following manner:

Fig. 4 is a flowchart illustrating a contention window adjustment method according to still another embodiment of the present disclosure. As shown in fig. 4, the method may be applied to a user equipment UE in a directional LBT scenario, and is specifically described from the UE side, the method may include:

s410: a direction in which a contention window needs to be maintained is determined.

In a possible implementation manner of the present disclosure, the UE may determine the direction of the contention window to be maintained according to the direction corresponding to each SSB, and may use the direction corresponding to the SSB as the direction of the contention window to be maintained.

In another possible implementation manner of the present disclosure, the UE may also determine the direction of the contention window that needs to be maintained according to the direction indicated by the network element device, and may determine the direction indicated by the network element device as the direction of the contention window that needs to be maintained. The reference signal for direction indication may be CSI-RS, SSB, SRS, TRS, or DRS.

Before determining the direction in which the contention window needs to be maintained, the UE may receive an RRC, or MAC-CE, or DCI indication sent by the network element device, and determine, according to the RRC, or MAC-CE, or DCI indication, an SSB, and/or CSI-RS, and/or SRS, and/or TRS, and/or DRS indicated by the network element device. The DCI may have a field indicating an index d of the CSI-RS and/or the SSB and/or the SRS and/or the DRS, and the UE may maintain a contention window value in a direction corresponding to the reference signal. For uplink transmission, the UE may autonomously determine which reference signals correspond to which directions each maintain the contention window value without interacting with the network element device, and adjust the CWS according to the quality of transmission. The quality of transmission may refer to whether there is new data in the PUSCH of one or several reference slots, or other criteria. Further, the UE may notify the network element device of the index number corresponding to the selected reference signal in a UCI or higher layer signaling manner.

S420: and maintaining the uplink CWS in the direction of the contention window needing to be maintained.

In a possible implementation manner of the present disclosure, the UE may determine the direction in which the contention window needs to be maintained according to the direction corresponding to the SSB, or may determine the direction in which the CW needs to be maintained according to the direction indicated by the network element device.

In a possible implementation manner of the present disclosure, the channel transmission quality in the CW direction may be maintained as needed, and the uplink CWs in the direction may be adjusted. The channel transmission quality may use the transmission success rate of the PUSCH as a decision criterion.

In a possible implementation manner of the present disclosure, the UE may adjust the uplink CWS in the direction according to a condition of newly-transmitted uplink transmission in the direction in which the contention window needs to be maintained in one or more reference slot slots. And if no new uplink transmission exists in the uplink transmission, adjusting the uplink contention window value in the direction, and increasing to a next allowable higher preset value. If CW is already at the maximum, it remains unchanged.

In some possible implementations of the present disclosure, the number of beam directions for which the contention window needs to be maintained may be reduced, for example, only the number of SSBs is used as the number of beam directions for which the contention window needs to be maintained, or several beam directions are fixed by a predefined or higher layer signaling configuration for maintaining the contention window. In an implementation manner of the present disclosure, a determination manner of whether the uplink transmission is a newly transmitted uplink transmission may include:

Based on the methods provided by the embodiments corresponding to fig. 1 and fig. 2, the present disclosure also provides a network element device. The network element equipment can be applied to a directional LBT application scenario. Fig. 5 is a schematic block structure diagram of an embodiment of a network element device provided by the present disclosure. Specifically, as shown in fig. 5, the network element device may include:

the contention window adjusting module 102 is configured to maintain a downlink contention window value in a direction in which a contention window needs to be maintained.

In a possible implementation manner of the present disclosure, the network element device may further include:

the direction determining module 101 may be configured to determine a direction of the contention window needing to be maintained.

In a possible implementation manner of the present disclosure, the direction determining module 101 may be configured to determine the direction of the contention window needing to be maintained according to a predetermined direction.

In a possible implementation manner of the present disclosure, the contention window adjusting module 102 may be configured to adjust a downlink contention window value in a direction of a contention window according to a need to maintain channel transmission quality in the direction.

In a possible implementation manner of the present disclosure, the contention window adjusting module 102 is further configured to adjust a value of a downlink contention window in a direction of the contention window according to HARQ feedback information of a PDSCH in the direction of the physical downlink shared channel that needs to be maintained in one or more reference timeslots.

In a possible implementation manner of the present disclosure, the adjusting, according to HARQ feedback information of a PDSCH in a direction in which a contention window needs to be maintained in one or more reference timeslots, a value of a downlink contention window in the direction may include:

In one possible implementation manner of the present disclosure, the one or more reference time slots are the latest one or more reference time slots in which the base station has transmission on the current carrier, and multiple transmissions in the one or more reference time slots have corresponding HARQ-ACK feedback.

In a possible implementation manner of the present disclosure, the contention window adjusting module 102 is further configured to adjust a value of a downlink contention window in a direction in which the contention window needs to be maintained according to a receiving result of a physical uplink shared channel PUSCH in the direction within a preset time window.

In a possible implementation manner of the present disclosure, the adjusting, according to a reception result of a PUSCH in a direction in which a contention window needs to be maintained within a preset time window, a value of a downlink contention window in the direction includes:

and if the ratio of unsuccessful PUSCH reception in the direction in which the contention window needs to be maintained in the preset time window exceeds a second preset ratio value, or the ratio of successful PUSCH reception in the direction in which the contention window needs to be maintained in the preset time window is lower than a fourth preset ratio value, adjusting the value of the contention window in the direction, and increasing to a next allowable higher preset value. For the same or similar processes as those in the embodiments shown in fig. 1 and fig. 2, the specific implementation manners may be implemented according to the implementation manners provided in the embodiments corresponding to fig. 1 and fig. 2.

Based on the methods provided by the embodiments corresponding to fig. 3 and fig. 4, the present disclosure also provides a user equipment. The user equipment may be applied to a directional LBT application scenario. Fig. 6 is a schematic block diagram of an embodiment of a user equipment provided by the present disclosure. Specifically, as shown in fig. 6, the user equipment may include:

the contention window adjusting module 203 may be configured to maintain the uplink contention window value in a direction in which the contention window needs to be maintained.

In one possible implementation manner of the present disclosure, the user equipment may further include:

the direction determining module 202 may be configured to determine a direction of the contention window needing to be maintained.

In a possible implementation manner of the present disclosure, the user equipment may further include an indication receiving module 201, configured to receive an indication sent by the network element equipment;

correspondingly, in this implementation manner, the direction determining module 202 is configured to determine the direction of the contention window needing to be maintained according to the direction indicated by the network element device.

In another possible implementation manner of the present disclosure, the direction determining module 202 may be configured to determine the direction of the contention window needing to be maintained according to the direction corresponding to each SSB.

In another possible implementation manner of the present disclosure, the contention window adjusting module 203 may be configured to adjust the uplink contention window value in a direction of the contention window according to a need to maintain channel transmission quality in the direction.

In yet another implementation manner of the present disclosure, the contention window adjusting module 203 may be further configured to adjust the value of the contention window for uplink in a direction in which the contention window needs to be maintained according to a new uplink transmission condition in uplink transmissions in the direction in one or more reference timeslots.

In a possible implementation manner of the present disclosure, the adjusting, according to a situation of newly-transmitted uplink transmission in a direction in which a contention window needs to be maintained in one or more reference timeslots, an uplink contention window value in the direction includes:

and if no new uplink transmission exists in the uplink transmission, adjusting the uplink contention window value in the direction, and increasing to a next allowable higher preset value.

In each of the foregoing implementation manners, the uplink transmission includes any one or more of an uplink shared channel UL-SCH and an uplink physical shared channel PUSCH.

In a possible implementation manner of the present disclosure, the determining whether the uplink transmission is a newly transmitted uplink transmission may include:

In one possible implementation manner of the present disclosure, the one or more reference slots may be:

if the UE is in time slot n_gAfter receiving a UL grant, note n_wIs in time slot n_gX index of the slot where the UE last transmitted UL-SCH with CAT4 LBT.

If from time slot n₀Starting and in time slot n₀，n₁，…，n_wThe middle UE transmits UL-SCH without gaps, then the reference slot may be n₀Or from n₀The first K slots. Wherein the value of K may be configured by the base station through higher layer signaling.

If from time slot n₀Starting and in time slot n₀，n₁，…，n_wThe medium UE does not satisfy gapless transmission UL-SCH, then the reference slot may be n_wOr from n_wFirst K time slots or from n_wWhere K UEs transmit UL-SCH with CAT4LBT before initiating the calculationThe index number of the slot. Wherein the value of K may be configured by the base station through higher layer signaling.

In another possible implementation manner of the present disclosure, the indication receiving module 201 may be configured to receive RRC and/or MAC-CE and/or DCI transmitted by a network element device;

the direction determination module is configured to determine, according to the RRC and/or MAC-CE and/or DCI, an SSB and/or CSI-RS and/or SRS and/or TRS and/or DRS indicated by the network element device.

For the flows related to the above-mentioned apparatuses, which are the same as or similar to the flows in the embodiments shown in fig. 3 and fig. 4, the specific implementation manners may be implemented according to the implementation manners provided in the embodiments corresponding to fig. 3 and fig. 4.

Fig. 7 is a block diagram illustrating a user device 800 according to an example embodiment. For example, user device 800 may be a mobile phone, a computer, a digital broadcast user device, a messaging device, a gaming console, a tablet device, a medical device, an exercise device, a personal digital assistant, and so forth.

Referring to fig. 7, user device 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the user device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

Memory 804 is configured to store various types of data to support operations at user device 800. Examples of such data include instructions for any application or method operating on user device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power component 806 provides power to the various components of the user device 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for user device 800.

The multimedia component 808 comprises a screen providing an output interface between the user device 800 and the user. In some embodiments, 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 an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the user equipment 800 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the user device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

Sensor component 814 includes one or more sensors for providing various aspects of state assessment for user device 800. For example, sensor assembly 814 may detect an open/closed state of user device 800, the relative positioning of components, such as a display and keypad of user device 800, sensor assembly 814 may also detect a change in the position of user device 800 or a component of user device 800, the presence or absence of user contact with user device 800, the orientation or acceleration/deceleration of user device 800, and a change in the temperature of user device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communications component 816 is configured to facilitate communications between user device 800 and other devices in a wired or wireless manner. The user equipment 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the user device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer readable storage medium, such as the memory 804, is also provided that includes computer program instructions executable by the processor 820 of the user device 800 to perform the above-described methods.

Figure 8 is a block diagram illustrating an apparatus 900 for a network element in accordance with an example embodiment. For example, the network element device or the base station 900 may be provided as a server. Referring to fig. 8, network element device 900 includes a processing component 922 that further includes one or more processors and memory resources, represented by memory 932, for storing instructions, such as applications, that are executable by processing component 922. The application programs stored in memory 932 may include one or more modules that each correspond to a set of instructions. Further, the processing component 922 is configured to execute instructions to perform the above-described methods.

Network element device 900 can also include a power component 926 configured to perform power management of network element device 900, a wired or wireless network interface 950 configured to connect network element device 900 to a network, and an input output (I/O) interface 958. The network element device 900 may operate based on an operating system stored in the memory 932, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.

In an exemplary embodiment, a non-transitory computer readable storage medium, such as the memory 932, is also provided that includes computer program instructions executable by the processing component 922 of the network element device 900 to perform the above-described method.

The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.

The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.

The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.

The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).

Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.

These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.

The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A contention window adjustment method applied to a directional LBT (local binary transmission) scene is characterized by comprising the following steps: maintaining the numerical value of a downlink contention window in the direction of the contention window needing to be maintained;

before maintaining the contention window value in the direction in which the contention window needs to be maintained, the method further comprises: determining the direction of the contention window needing to be maintained; wherein, the direction of the contention window needing to be maintained corresponds to the LBT monitoring direction;

the determining the direction of the contention window needing to be maintained includes:

determining a direction of the contention window needing to be maintained according to a predetermined direction, wherein the predetermined direction is determined by being associated with a synchronization signal block SSB and/or a channel state information reference signal CSI-RS and/or a sounding reference signal SRS and/or a sounding reference signal TRS and/or a discovery reference signal DRS;

or, determining the direction of the contention window to be maintained according to the direction corresponding to the uplink transmission fed back by the user equipment UE or according to the direction indicated by the user equipment UE.

2. The method of claim 1, wherein maintaining the downlink contention window value in the direction in which the contention window needs to be maintained comprises:

3. The method of claim 2, wherein the maintaining the channel transmission quality in the contention window direction as needed, and adjusting the downlink contention window value in the contention window direction comprises:

4. The method of claim 3, wherein the adjusting the value of the downlink contention window in the direction according to the HARQ feedback information of the PDSCH in the direction in which the contention window needs to be maintained in one or more reference timeslots comprises:

5. The method of claim 3 or 4, wherein the one or more reference slots are the latest one or more reference slots in which a current network element device on a carrier has a transmission, and wherein a plurality of transmissions in the one or more reference slots have corresponding HARQ-ACK feedback.

6. The method of claim 2, wherein the maintaining the channel transmission quality in the contention window direction as needed, and adjusting the downlink contention window value in the contention window direction comprises:

7. The method according to claim 6, wherein the adjusting, according to the reception result of the PUSCH in the direction in which the contention window needs to be maintained within the preset time window, the value of the downlink contention window in the direction comprises:

8. A contention window adjustment method applied to a directional LBT (local binary transmission) scene is characterized by comprising the following steps: maintaining the numerical value of the uplink contention window in the direction of maintaining the contention window;

9. The method of claim 8, wherein maintaining the contention window value in the direction in which the contention window needs to be maintained comprises:

10. The method of claim 9, wherein the maintaining the channel transmission quality in the contention window direction as needed, and adjusting the uplink contention window value in the contention window direction comprises:

11. The method of claim 10, wherein the adjusting the value of the contention window for uplink in the direction according to the newly transmitted uplink transmission in the direction in which the contention window needs to be maintained in one or more reference timeslots comprises:

12. The method of claim 10, wherein the adjusting the value of the contention window for uplink in the direction according to the newly transmitted uplink transmission in the direction in which the contention window needs to be maintained in one or more reference timeslots comprises:

13. The method according to any of claims 10-12, wherein the uplink transmission comprises any or both of an uplink shared channel (UL-SCH) and an uplink physical shared channel (PUSCH).

14. The method according to any one of claims 10 to 12, wherein the determining whether the uplink transmission is a new uplink transmission comprises:

15. The method of any one of claims 10 to 12, wherein the one or more reference time slots are determined by:

if the UE is in time slot n_gAfter receiving a UL grant, note n_wIs in time slot n_g-index number of the timeslot where the UE last transmitted UL-SCH with CAT4LBT before X;

if from time slot n₀Starting and in time slot n₀，n₁，…，n_wIf the UE does not satisfy gapless transmission UL-SCH, n is determined_wOr from n_wFirst K time slots or from n_wBefore the initial calculation, the time slot in which CAT4LBT transmits UL-SCH is adopted by K UEs as a reference time slot, wherein the value of K is configured by network element equipment through high-level signaling.

16. The method of claim 8, wherein determining the direction of the contention window needing to be maintained according to the direction corresponding to the SSB and/or the CSI-RS indicated by the network element device further comprises:

receiving RRC and/or MAC-CE and/or DCI sent by network element equipment;

17. A network element device, applied to a directional LBT scenario, the network element device comprising:

a contention window adjusting module configured to maintain a downlink contention window value in a direction in which a contention window needs to be maintained;

the direction determining module is used for determining the direction of the competition window needing to be maintained; wherein, the direction of the contention window needing to be maintained corresponds to the LBT monitoring direction;

the direction determination module is configured to determine a direction of the contention window needing to be maintained according to a predetermined direction, wherein the predetermined direction is determined by associating with a synchronization signal block SSB and/or a channel state information reference signal CSI-RS and/or a sounding reference signal SRS and/or a sounding reference signal TRS and/or a discovery reference signal DRS;

or, the direction determining module is configured to determine the direction of the contention window needing to be maintained according to a direction corresponding to uplink transmission fed back by the user equipment UE or according to a direction indicated by the user equipment UE.

18. The network element device of claim 17, wherein the contention window adjusting module is configured to adjust the value of the downlink contention window in a direction of the contention window according to a channel transmission quality in the direction that needs to be maintained.

19. The network element device of claim 18, wherein the contention window adjusting module is further configured to adjust the value of the downlink contention window in a direction in which the contention window needs to be maintained according to HARQ feedback information of a PDSCH (physical downlink shared channel) in the direction in one or more reference time slots.

20. The network element device of claim 19, wherein the adjusting, according to the HARQ feedback information of the PDSCH in the direction in which the contention window needs to be maintained in the one or more reference timeslots, the value of the downlink contention window in the direction comprises:

21. The network element device of claim 19 or 20, wherein the one or more reference slots are the latest one or more reference slots transmitted by the base station on the current carrier, and wherein a plurality of transmissions in the one or more reference slots have corresponding HARQ-ACK feedback.

22. The network element device of claim 18, wherein the contention window adjusting module is further configured to adjust a value of a downlink contention window in a direction in which the contention window needs to be maintained according to a received result of a physical uplink shared channel, PUSCH, in the direction within a preset time window.

23. The network element device of claim 22, wherein the adjusting, according to the reception result of the PUSCH in the direction in which the contention window needs to be maintained within the preset time window, the value of the downlink contention window in the direction comprises:

24. A user equipment, applied to a directional LBT scenario, the user equipment comprising:

a contention window adjusting module configured to maintain an uplink contention window value in a direction in which a contention window needs to be maintained;

the user equipment further comprises:

the user equipment also comprises an indication receiving module used for receiving the indication sent by the network element equipment;

25. The UE of claim 24, wherein the contention window adjusting module is configured to adjust the value of the contention window for uplink in a direction of the contention window according to a need to maintain the channel transmission quality in the direction.

26. The UE of claim 25, wherein the contention window adjusting module is further configured to adjust the value of the contention window for uplink in a direction in which the contention window needs to be maintained according to a new uplink transmission in the direction in one or more reference timeslots.

27. The UE of claim 26, wherein the adjusting the value of the contention window for uplink in the direction according to the newly transmitted uplink transmission in the direction in which the contention window needs to be maintained in the one or more reference timeslots comprises:

28. The UE of claim 26, wherein the adjusting the value of the contention window for uplink in the direction according to the newly transmitted uplink transmission in the direction in which the contention window needs to be maintained in the one or more reference timeslots comprises:

29. The user equipment according to any of claims 26-28, wherein the uplink transmission comprises any or both of an uplink shared channel, UL-SCH, an uplink physical shared channel, PUSCH.

30. The ue according to any one of claims 26 to 28, wherein the manner of determining whether the uplink transmission is a new uplink transmission comprises:

31. The UE of any one of claims 26 to 28, wherein the one or more reference timeslots comprise one or more of the following:

32. The ue of claim 24, wherein the direction determining module is further configured to determine the direction of the contention window needing to be maintained according to a direction corresponding to an SSB and/or a CSI-RS indicated by a network element device; the indication receiving module is configured to receive RRC and/or MAC-CE and/or DCI sent by the network element equipment;

33. A network element device, applied to a directional LBT scenario, the network element device comprising:

a transceiver;

a processor configured to perform the method of any one of claims 1 to 7.

34. A user equipment, applied to a directional LBT scenario, the user equipment comprising:

a transceiver;

a processor configured to perform the method of any one of claims 8 to 16.

35. A non-transitory computer readable storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by a processor, implement the method of any one of claims 1 to 7 and 8 to 16.