CN110800360B

CN110800360B - Competition window length adjustment method and device, communication equipment and storage medium

Info

Publication number: CN110800360B
Application number: CN201980002111.7A
Authority: CN
Inventors: 朱亚军
Original assignee: Xiaomi Communications Co Ltd
Current assignee: Xiaomi Communications Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2024-05-03
Anticipated expiration: 2039-09-27
Also published as: CN110800360A; WO2021056475A1

Abstract

The application discloses a contention window length adjustment method and device, communication equipment and a storage medium. The contention window length adjustment method may include: and when the unlicensed spectrum has a downlink control instruction, adjusting the contention window length CWS according to the behavior execution condition triggered by the downlink control instruction.

Description

Competition window length adjustment method and device, communication equipment and storage medium

Technical Field

The present application relates to the field of wireless communications, and in particular, to a method and apparatus for adjusting a contention window length, a communication device, and a storage medium.

Background

The continuous emergence of new generation of augmented Reality (Augment Reality, AR)/Virtual Reality (VR) applications, vehicle-to-vehicle communications, and the like, has put forward higher demands on wireless communication technologies, driving the continuous evolution of wireless communication technologies to meet the demands of the applications.

Cellular mobile communication technology is currently in the evolution phase of the new generation technology. An important feature of the new generation of technology is the flexible configuration that supports multiple service types. As different service types have different requirements for wireless communication technologies, for example, the main requirements of the enhanced mobile broadband (Enhanced Mobile Broadband, eMBB) service types are focused on the aspects of large bandwidth, high speed and the like; the main requirements of Ultra-high reliability and Ultra-Low delay communication (Ultra-Low LatencyCommunication, URLLC) service types are focused on the aspects of higher reliability and Low delay; the major requirements of the business type of the large-scale internet of things (MASSIVE MACHINE TYPE of Communication, mMTC) are focused on the aspect of large connection numbers. New generation wireless communication systems therefore require flexible and configurable designs to support the transmission of multiple traffic types.

With the driving of service demands, the use of licensed spectrum alone cannot meet the service demands, and thus, deployment of mobile networks on unlicensed spectrum is considered. Other systems, such as WiFi systems, may exist on unlicensed spectrum, but efficient utilization of resources and reduced waste on unlicensed spectrum are technical issues that need to be further addressed.

Disclosure of Invention

The embodiment of the application provides a contention window length adjustment method and device, communication equipment and storage medium.

An embodiment of the present application provides a contention window length (Contention Window Size, CWS) determining method, applied to a base station, where the method includes:

And when the downlink control instruction exists on the unlicensed spectrum, adjusting the CWS according to the behavior execution condition triggered by the downlink control instruction.

A second aspect of an embodiment of the present application provides a contention window length adjustment apparatus, applied to a base station, where the apparatus includes:

And the adjusting module is configured to adjust the CWS according to the behavior execution condition triggered by the downlink control instruction when the downlink control instruction exists on the unlicensed spectrum.

A third aspect of an embodiment of the present application provides a communication device, including:

A transceiver;

a memory;

And the processor is respectively connected with the transceiver and the memory, and is used for controlling the wireless signal transceiving of the transceiver and realizing the contention window length adjusting method provided by any one of the technical schemes of the first aspect by executing the computer executable instructions stored on the memory.

A fourth aspect of the embodiment of the present application provides a computer storage medium, where computer executable instructions are stored, where the computer executable instructions, when executed by a processor, can implement the contention window length adjustment method provided in any one of the first aspect.

According to the technical scheme, when the downlink control instruction exists on the unlicensed spectrum, the CWS is adaptively adjusted according to the behavior execution condition triggered by the downlink control instruction. The CWS limits the maximum value of random rollback in the channel interception process, and directly determines the occupation condition of the current unlicensed spectrum if data is transmitted on the PUCCH and/or the PUSCH, so that whether the downlink control instruction needs to be retransmitted is reflected according to the execution condition of the behavior triggered by the downlink control instruction, the CWS which is more suitable for the occupation condition of the current unlicensed spectrum can be determined, the conflict aggravation among access nodes of channels contained in the unlicensed spectrum caused by the too small CWS is reduced, and the phenomenon of low channel access efficiency caused by the too large CWS is also reduced. Therefore, the technical scheme provided by the embodiment of the application has reasonable CWS setting, on one hand, the intensity of the channel on the unlicensed spectrum can be effectively reduced, and on the other hand, the low channel access efficiency caused by the overlarge CWS is reduced, and the fair competition of the channel on the unlicensed spectrum can be realized.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of embodiments of the disclosure.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

Fig. 1 is a schematic diagram of a wireless communication system according to an exemplary embodiment;

fig. 2 is a flow chart illustrating a contention window length adjustment method according to an exemplary embodiment;

Fig. 3A is a flow chart illustrating a contention window length adjustment method according to an exemplary embodiment;

Fig. 3B is a flow chart illustrating a contention window length adjustment method according to an exemplary embodiment;

Fig. 4 is a schematic diagram illustrating time slot based channel listening in accordance with an example embodiment;

fig. 5 is a flow chart illustrating a contention window length adjustment method according to an exemplary embodiment;

Fig. 6 is a schematic structural view of a contention window length adjustment apparatus according to an exemplary embodiment;

Fig. 7 is a schematic view of a structure of a terminal according to an exemplary embodiment;

fig. 8 is a schematic diagram illustrating a structure of a base station according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

The terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" depending on the context.

Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: a number of terminals 11 and a number of base stations 12.

Where the terminal 11 may be a device providing voice and/or data connectivity to a user. The terminal 11 may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), and the terminal 11 may be an internet of things terminal such as a sensor device, a mobile phone (or "cellular" phone) and a computer with an internet of things terminal, for example, a fixed, portable, pocket, hand-held, computer-built-in or vehicle-mounted device. Such as a Station (STA), subscriber unit (subscriber unit), subscriber Station (subscriber Station), mobile Station (mobile Station), remote Station (remote Station), access point, remote terminal (remote terminal), access terminal (ACCESS TERMINAL), user equipment (user terminal), user agent (user agent), user device (user equipment), or user terminal (UE). Or the terminal 11 may be a device of an unmanned aerial vehicle. Or the terminal 11 may be a vehicle-mounted device, for example, a car-driving computer with a wireless communication function, or a wireless communication device externally connected with the car-driving computer. Or the terminal 11 may be a roadside device, for example, a street lamp, a signal lamp, or other roadside devices having a wireless communication function, or the like.

The base station 12 may be a network-side device in a wireless communication system. The wireless communication system may be a 5G system, also known as a New Radio (NR) system or a 5G NR system. Or the wireless communication system may be a system supporting New air interface unlicensed spectrum communication (NR-U, new Radio-Unlicense). Or the wireless communication system may be a next generation system of the 5G system. Among them, the access network in the 5G system may be called NG-RAN (New Generation-Radio Access Network, new Generation radio access network). .

The base station 12 may be a base station (gNB) in a 5G system employing a centralized and distributed architecture. When the base station 12 employs a centralized and distributed architecture, it typically includes a Centralized Unit (CU) and at least two Distributed Units (DUs). A protocol stack of a packet data convergence protocol (PACKET DATA Convergence Protocol, PDCP) layer, a radio link layer Control protocol (Radio Link Control, RLC) layer, and a medium access Control (MEDIA ACCESS Control, MAC) layer is arranged in the centralized unit; a Physical (PHY) layer protocol stack is provided in the distribution unit, and the specific implementation of the base station 12 is not limited by the embodiment of the present disclosure.

A wireless connection may be established between the base station 12 and the terminal 11 over a wireless air interface. In various embodiments, the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, such as the wireless air interface is a new air interface; or the wireless air interface can also be a wireless air interface based on the technical standard of the next generation mobile communication network of 5G.

In some embodiments, an E2E (End to End) connection may also be established between terminals 11. In some embodiments, the above wireless communication system may further comprise a network management device 13.

Several base stations 12 are connected to a network management device 13, respectively. The network management device 13 may be a core network device in a wireless communication system, for example, the network management device 13 may be a Mobility management entity (Mobility MANAGEMENT ENTITY, MME) in an evolved packet core (Evolved Packet Core, EPC). Or the network management device may be other core network devices, such as a service GateWay (SERVING GATEWAY, SGW), a public data network GateWay (Public Data Network GateWay, PGW), a Policy AND CHARGING Rules Function (PCRF), or a home subscriber server (Home Subscriber Server, HSS), etc. The embodiment of the present disclosure is not limited to the implementation form of the network management device 13.

Execution bodies to which embodiments of the present disclosure relate include, but are not limited to: communication devices supporting NR-U, wherein user devices include, but are not limited to: user terminals, mobile terminals, vehicle-mounted communication equipment, roadside infrastructure devices, intelligent wearable devices, tablet computers, user nodes, base stations and the like.

In the development of wireless communication systems, unlicensed frequency bands are used by mechanisms for assisted licensed access (LICENSE ASSISTED ACCESS, LAA) to unlicensed spectrum. That is to say the use of unlicensed bands is facilitated by licensed bands. In order to ensure coexistence of other systems (such as WiFi) in an unlicensed band, a mechanism that a channel needs to be detected before data transmission is also introduced into the LAA, a transmitting end needs to detect whether a channel is idle when there is data to be transmitted, and the transmitting end can transmit data only after the channel is in an idle state. There are a variety of mechanisms for channel detection. For example, take the downlink channel detection procedure as an example, the channel detection mechanism of capability access class (cat) 4. The channel detection mechanism for cat4 is idle channel detection based on random back-off (CLEAR CHANNEL ASSESSMENT, CCA). The access node uniformly and randomly generates a back-off counter N between 0 and the length of the contention window, listens with the interception time slot (CCAslot) as granularity, reduces the back-off counter by one if the channel is detected to be idle in the interception time slot, otherwise, suspends the back-off counter if the channel is detected to be busy, namely, the back-off counter N is kept unchanged in the busy time of the channel until the channel is detected to be idle; when the back-off counter is decremented to 0, the access node may immediately occupy the channel. The CWS of cat.4 is a dynamically adjusted value that the access node dynamically adjusts the CWS based on whether the previous transmission was correctly received by the receiving node. Therefore, the proper CWS value can be obtained by adjusting the channel state and the network service load, and a compromise is obtained between reducing the collision among the sending nodes and improving the channel access efficiency. As shown in the following figure, the cws=15 corresponding to the first downlink PDSCH transmission, and the user fails to receive the PDSCH in the first downlink transmission, so the base station increases the CWS value to cws=31 according to the error receiving state, and uses the increased CWS to generate a random number N and perform channel listening before the second PDSCH transmission.

The specific flow of CWS adjustment may include:

Step 1: for each service priority p epsilon {1,2,3,4}, setting CW _p＝CW_min,p.CW_p as the value of the contention window length of the service priority p; CW _p,min is the minimum value of the contention window length of traffic priority p.

Step 2: for any one pre-communication interception (Listen Before Talk, LBT), if the base station receives at least z=80% of HARQ-ACKs among all hybrid automatic repeat request acknowledgements (Hybrid Automatic Repeat reQuest acknowledgement character, HARQ-ACKs) of data transmitted on all physical downlink shared channels (Physical Downlink SHARED CHANNEL, PDSCH) contained in reference subframe k as negative acknowledgements (non acknowledgement character, NACK), the CW _p corresponding to each traffic priority p e {1,2,3,4} is increased to the value of the next higher CWs in the CWs table corresponding to that traffic priority, and interception of step 2 is continued. Otherwise (the number of HARQ-ACK is not more than 80%) entering step 1, and after entering step 1, reducing CWs _p corresponding to each service priority p epsilon {1,2,3,4} to the minimum value of CWS in the CWS table corresponding to the service priority.

The reference subframe k is the first subframe in one downlink transmission sent by the base station on the current carrier and closest to the current time, and the base station can expect to receive HARQ-ACK feedback on the subframe. In addition, if CW _p has taken the maximum value CW _max,p in the set, then the next higher value to adjust CWs is still CW _max,p. If the CW _p corresponding to a certain traffic priority takes the maximum value CW _p＝CW_max,p in K consecutive CWs adjustments and back-off counter generation, the CW _p of that traffic priority is reset to the minimum value CW _min,p. Where k is selected from {1,2, …,8} by the base station, and each service priority p e {1,2,3,4} can independently select the value of k. CW _max,p is the maximum value of the contention window length of traffic priority p.

The new generation communication system supports a flexible system frame structure, so that transmission on the PDSCH does not exist on the reference resource, and the CWS is adjusted according to the transmission of the PDSCH, which cannot be realized in the new generation communication system; therefore, the adjustment of the CWS is disordered on the unlicensed spectrum of the new generation communication system, and in most cases, a proper CWS cannot be selected for the base station to detect the channel on the unlicensed spectrum.

As shown in fig. 2, the present embodiment provides a method, which is applied to a base station, and includes:

S110: and when the downlink control instruction exists on the unlicensed spectrum, adjusting the CWS according to the behavior execution condition triggered by the downlink control instruction.

The base station may be a base station for each generation of cellular communication, e.g., a 2G to 5G base station, or a 5G later base station.

The downlink control instruction is a control instruction issued by the base station and used for triggering various terminal behaviors.

The downlink control instruction may include: and the control instruction instructs the terminal to carry out uplink transmission and/or the control instruction changes the behavior of the terminal.

The behavior execution condition triggered by the downlink control instruction can reflect whether the base station needs to re-occupy the channel of the unlicensed spectrum to issue the same downlink control instruction, so that the urgency of the base station to access the channel on the unlicensed spectrum is reflected, and the behavior execution condition can be used for adjusting the CWS.

As shown in fig. 3A, when a downlink control instruction on an unlicensed spectrum is used to trigger uplink transmission, S110 may include:

s111: and adjusting the CWS according to whether the data transmission on the PUSCH and/or the PUCCH triggered by the downlink control instruction is detected.

The method provided by the embodiment of the application can be applied to an application scene without the feedback of the hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) of the physical downlink shared channel (Physical Downlink SHARED CHANNEL, PDSCH) data on the reference resource of the unlicensed spectrum. At present, the method provided by the implementation of the application can also be applied to an application scene containing the HARQ feedback of the PDSCH data.

The downlink control instruction triggering the uplink transmission is issued by the base station and is used for triggering the terminal to perform the control instruction of the uplink transmission. The downlink control instruction may schedule an uplink transmission of unlicensed spectrum including, but not limited to, PUSCH transmission and PUCCH transmission.

And when the data transmission on the PUSCH and/or the PUCCH triggered by the downlink control instruction is carried out, the successful issuing of the downlink control instruction is indicated.

The base station detects data transmission on PUSCH and/or PUCCH, for example, detects PUCCH and/or PUSCH, and if there is data transmission on PUSCH and/or PUCCH, the signal strength detected by the base station is different, so whether there is data transmission on PUSCH and/or PUCCH can be determined according to comparison between the signal strength of a wireless signal detected on PUSCH and/or PUCCH and the strength threshold, or the like.

After adjusting the CWS, the base station listens to the channel on the unlicensed spectrum and performs channel access based on the adjusted CWS, so as to perform downlink transmission.

Under an unauthorized row detection scheme, a back-off counter count N can be generated uniformly and randomly between 0 and the contention window length (CWS, contention Window Size), with N being between 0 and CWS. When the channel of the unauthorized frequency band is detected to be idle, the count value of the counter is decremented by 1, when the channel of the unauthorized frequency band is detected to be busy, the count value of the counter is unchanged, and when the count value of the counter is 0, the channel of the unauthorized frequency band is occupied immediately.

So that if the CWS is set too small, it will access channels on unlicensed spectrum faster. If the CWS is set too large, the channel access efficiency is low, and further the problem of large data transmission delay is caused.

As shown in fig. 4, when the transmitting end transmits data to the receiving end for the first time, the CWS adopted by the detection channel is 15, and the count value of the counter is 7, then after 2 CCA detects the channel idle of the unlicensed band, 4 CCA detects the channel busy of the unlicensed band, and then 5 CCA detects the channel idle of the unlicensed band, so that 7 CCA detects the channel idle of the unlicensed band, the count value of the counter is reduced to 0, and the channel occupying the unlicensed band transmits data to the receiving end. However, if the receiving end fails to successfully receive the data, the transmitting end may adjust the CWS during the period of occupying the channel of the unlicensed band, for example, increase the CWS to 31, and the counter value of the counter is 20, so when the transmitting end transmits the data to the receiving end for the second time, after 20 CCA detects that the channel of the unlicensed band is idle, the channel occupying the unlicensed band transmits the data to the receiving end.

In some embodiments, the detection of CCA is not limited to being in units of slots, but may also be in units of subframes or symbols.

In some embodiments, as shown in fig. 5, the method further comprises:

s120: and sending window information of the adjusted CWS, wherein the window information comprises window values of the CWS.

Through the transmission of the window information of the CWS, the terminal knows the current CWS, and on one hand, the terminal can perform unlicensed spectrum uplink interception and channel occupation according to the received CWS; alternatively, the terminal may evaluate the channel condition status on the unlicensed spectrum based on the CWS.

The contention window length provided in this embodiment is related to whether there is data transmission on PUSCH and/or PUCCH triggered by a downlink control instruction on an unlicensed spectrum, so that the determined CWS can reduce the phenomenon of intense collision or low channel access efficiency between access nodes of channels on the unlicensed spectrum caused by unreasonable CWS setting, compared with the randomly acknowledged CWS or the fixed CWS adopted all the time.

The access Node may include the aforementioned base station, may also include a terminal, and may also include a Relay Node (RN), and the like.

The transmission conditions of the data transmission on PUSCH and/or PUCCH may include: may be embodied in terms of a transmission success rate or a transmission failure rate.

The transmission failure rate may be: the number of data failed to be transmitted and the total number of data transmitted. The transmission success rate may be: the number of data successfully transmitted and the total number of data transmitted.

If the data transmission failure rate is high and the probability that retransmission is needed is high, the competition on the unlicensed spectrum is relatively strong.

For example, S111 may include: the CWS is adjusted according to the data transmission failure rate on PUSCH and/or PUCCH.

In some embodiments, S111 may include:

And when detecting that the failure rate of the data transmission on the PUSCH or the PUSCH triggered by the downlink control instruction is larger than a first threshold value, increasing the CWS.

By using the method provided by the embodiment of the application, the CWS on the unlicensed spectrum is determined according to whether the data transmission on the PUSCH and/or the PUCCH is detected. As such, the CWS at the current time may be determined based on the transmission on PUSCH and/or PUCCH in the previous time period. The previous time is an arbitrary period of time before the current time.

In some embodiments, the first threshold may be a statistical value set according to the transmission load and the historical transmission condition. In other embodiments, the first threshold may also be a simulated value or an experimental value based on experimental data,

Increasing the CWS may include at least one of:

adding an increasing step length on the current CWS according to a preset increasing step length to obtain an increased CWS;

And determining an increase amplitude according to the difference value of the transmission failure rate minus the first threshold value, and calculating the increased CWS based on the increase amplitude and the current CWS. Here, the difference of the transmission failure rate minus the first threshold value is positively correlated with the increase amplitude, i.e., the larger the difference is, the larger the increase amplitude is.

In some embodiments, the CWS is set with a maximum value and a minimum value, and if the current CWS is less than the maximum value, the CWS is increased when the transmission failure rate is greater than a first threshold; the increase may be any of the foregoing, and stops when the CWS increases to a maximum value.

In other embodiments, if the data transmission failure rate on PUSCH and/or PUCCH is less than or equal to the first threshold, the CWS may be maintained, i.e. the CWS at the current time is continued to be used at the next time.

In other embodiments, if the rate of data transmission failure on PUSCH and/or PUCCH is less than or equal to the first threshold, the CWS is adjusted to a minimum value, i.e., the minimum CWS value continues to be used at the next time.

In some embodiments, S111 may include:

When detecting that no data transmission on the PUSCH and/or the PUCCH is triggered by the downlink control instruction, adjusting the CWS according to the Random access condition on a Random access channel (Random ACCESS CHANNEL, RACH) triggered by the downlink control instruction;

And/or the number of the groups of groups,

And when detecting that no data transmission on the PUSCH and/or the PUCCH is triggered by the downlink control instruction, adjusting the CWS according to the transmission condition of the reference signal triggered by the downlink control instruction.

In the embodiment of the present application, the base station detects the random access condition and the detection reference signal transmission condition on RACH, similar to detecting the data transmission on PUSCH and/or PUCCH, except that: the transport channels of RACH and reference signals are detected.

The reference signals may include, but are not limited to, channel Sounding reference signals (Sounding REFERENCE SIGNAL, SRS).

The random access conditions on RACH include: there is random access on the RACH and no random access on the RACH. If the random access channel has random access, the downlink control instruction is successfully transmitted, and the channel resource competition on the unlicensed spectrum is smaller, so that the downlink control instruction can have smaller CWS.

If there is a reference signal transmission (e.g., there is an SRS transmission), it indicates that the downlink control command is successfully transmitted, which indicates that the channel resource contention on the unlicensed spectrum is smaller, and thus, a smaller CWS may be required.

In some embodiments, when detecting that there is no data transmission on PUSCH and/or PUCCH triggered by a downlink control instruction, according to a random access condition on a random access channel RACH triggered by the downlink control instruction may include:

And when detecting that no data transmission on the PUSCH and/or the PUCCH triggered by the downlink control instruction is detected, increasing the CWS when the proportion of users randomly accessed on the RACH triggered by the downlink control instruction is smaller than a second threshold value.

If the proportion of users performing random access on the RACH is small, the probability of retransmitting the downlink control instruction of the channel needing to re-occupy the unlicensed spectrum is higher, so that the occupation probability of the base station to the channel where the unlicensed spectrum is located is increased by increasing the CWS.

In some embodiments, S111 may include:

And when the data transmission on the PUSCH and/or the PUCCH triggered by the downlink control instruction does not exist, and the unlicensed spectrum uplink and downlink control instruction triggers the reference signal transmission, increasing the CWS when the proportion of users with the reference signal transmission triggered based on the downlink control instruction is smaller than a third threshold.

If the proportion of users with reference signal transmission is small, the probability of retransmitting the downlink control instruction of the channel needing to re-occupy the unlicensed spectrum is higher, so that the CWS is increased to improve the occupation probability of the base station to the channel where the unlicensed spectrum is located.

In some embodiments, as shown in fig. 3B, when a downlink control instruction on the unlicensed spectrum is used to trigger a terminal behavior change, S110 may include:

S112: and adjusting the CWS according to the change result of the terminal behavior triggered by the downlink control instruction.

The terminal behavior is various behaviors of the terminal in the wireless communication process. For example, whether or not the terminal performs uplink power adjustment according to the instruction, and the like.

If the base station indicates the change of the terminal behavior through the downlink control instruction, the base station detects the change result of the terminal behavior. For example, if the downlink control instruction indicates that the terminal adjusts the uplink power, the base station determines a change result of the terminal behavior according to the matching between the received power and the adjusted power indicated by the downlink control instruction after receiving the uplink power of the terminal. For another example, if the downlink control instruction indicates that the terminal switches cells, the base station determines whether the terminal has a cell for changing its connection according to the cell connected to the terminal before the instruction and the cell connected to the terminal after the instruction, thereby determining the change result of the terminal behavior.

There are various ways in which the base station can detect whether the terminal behavior has changed, and this is not an example.

S112 may include: and when detecting that the data transmission on the PUSCH and/or the PUCCH is not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior.

If the data transmission on the PUSCH and/or the PUCCH triggered by the downlink control instruction is detected, the CWS can be preferentially adjusted according to the transmission condition of the data transmission on the PUSCH and/or the PUCCH triggered by the downlink control instruction.

In some embodiments, S112 may include: and when detecting that no data transmission on the PUSCH and/or the PUCCH is triggered by the downlink control instruction, and when no random access and/or reference signal transmission of the RACH is triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior.

For example, S112 may include one of:

When no data transmission on the PUSCH is triggered by the downlink control instruction and random access of the RACH is not triggered by the downlink control instruction, adjusting the CWS according to a change result of the terminal behavior;

When no data transmission is triggered by a downlink control instruction on the PUCCH and no random access is triggered by the downlink control instruction on the RACH, adjusting the CWS according to a change result of terminal behaviors;

when data transmission on the PUSCH and the PUCCH triggered by the downlink control instruction does not exist and random access of the RACH triggered by the downlink control instruction does not exist, adjusting the CWS according to a change result of the terminal behavior;

when there is no data transmission on the PUSCH triggered by the downlink control instruction and there is no SRS transmission triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

when no data transmission is triggered by the downlink control instruction on the PUCCH and no reference signal transmission is triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

When no data transmission is triggered by the downlink control instruction on the PUSCH and the PUCCH and no reference signal transmission is triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

when no data transmission on the PUSCH is triggered by the downlink control instruction and no random access of the RACH and reference signal transmission triggered by the downlink control instruction are triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

when no data transmission on the PUCCH is triggered by a downlink control instruction and no random access of the RACH and reference signal transmission triggered by the downlink control instruction are triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

And when no data transmission on the PUSCH and the PUCCH is triggered by the downlink control instruction, and no random access of the RACH and no reference signal transmission triggered by the downlink control instruction are triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior.

In some embodiments, adjusting the CWS according to the change in terminal behavior includes:

and adjusting the CWS according to the adjustment condition of the terminal for adjusting the uplink transmission power according to the downlink control instruction. For example, adjusting the CWS according to the adjustment status of the terminal to adjust the uplink transmission power according to the downlink control instruction includes: and when the proportion of the users which do not adjust the uplink transmission power according to the downlink control instruction reaches a fourth threshold value, increasing the CWS. For another example, adjusting the CWS according to the adjustment status of the terminal to adjust the uplink transmission power according to the downlink control instruction includes: and when the proportion of the users of which the uplink transmission power is not adjusted by the terminal according to the downlink control instruction is smaller than a fourth threshold value, reducing or maintaining the CWS. For example, when the CWS is greater than the minimum value of the CWS, the minimum value of the CWS currently used by the base station can be made by narrowing the CWS.

As shown in fig. 6, the contention window length adjustment method provided in this embodiment further includes:

And issuing indication information triggering CWS adjustment, wherein the indication information is used for indicating a base station to trigger the CWS adjustment based on the transmission status of a Code Block (CB), a Code Block Group (CBG) or a transmission Block (Transmission Block, TB).

For example, before the CWS adjustment is performed, whether an event triggering the CWS adjustment occurs, for example, data is transmitted between the base station and the terminal. These data transmissions will have corresponding transmission feedback that characterizes the transmission conditions. For example, if one CB corresponds to one transmission feedback (e.g., HARQ-ACK), N CBs are transmitted, N HARQ-ACKs are received, the proportion of ACKs and NACKs contained in the HARQ-ACKs is counted, if the proportion of NACKs in all HARQ-ACKs reaches a preset ratio, it is considered necessary to adjust the CWS, and at this time, an event triggering CWS adjustment may be considered to occur. Reference is now made to the foregoing embodiments for details of how this may be done and will not be further illustrated herein. N is a positive integer of 2 or more.

In the embodiment of the application, the adjustment of the CWS can be performed based on the transmission condition of the CB level, the transmission condition of the TB level, and the transmission condition of the CBG level. The same ratio of NACK in HARQ-ACK according to CBG reaches a preset ratio to trigger CWS adjustment. Of course, in some cases, the adjustment of CWS may be triggered by the NACK duty ratio in the HARQ-ACK of the TB reaching a preset ratio

In order to inform the terminal, the base station will send the indication information to inform the terminal that the current CWS adjustment triggered by the transmission feedback based on the CB, the CBG or the TB. After receiving the indication information, the terminal knows the event that the base station triggers the CWS adjustment, and can refer to the event that the base station triggers the CWS adjustment when adjusting the CWS of the terminal. Of course, whether or not reference is made specifically depends on the traffic situation and/or transmission requirements of the terminal itself.

In some embodiments, the transmission conditions of the CBs, CBGs, or TBs herein may be: transmission status of CB, CBG or TB transmitted in the previous period between the base station and the terminal. In other embodiments, the transmission status of the CB, CBG or TB herein may be: transmission status of CBs, CBGs or TBs interacted between the terminal and the base station during the current period. The CB, CBG or TB here may be: either an uplink CB, CBG or TB or a downlink CB, CBG or TB. The previous or current period here may correspond to a transmission unit selected by a radio frame, a subframe, or a slot, etc.

As shown in fig. 6, the present embodiment provides a contention window length adjustment apparatus, which is applied to a base station, and the apparatus includes:

and the adjusting module is configured to adjust the contention window length CWS according to the behavior execution condition triggered by the downlink control instruction when the downlink control instruction exists on the unlicensed spectrum.

The adjustment module provided by the embodiment of the application can be a program module, and after the program module is executed by the processor, the CWS can be adjusted based on the behavior execution condition triggered by the downlink control instruction.

In some embodiments, the adjustment module may be a soft and hard combined module including, but not limited to, various programmable arrays including, but not limited to: a complex programmable array or a field programmable array.

In some embodiments, when there is a downlink control instruction on the unlicensed spectrum that is a downlink control instruction for triggering uplink transmission, the adjustment module is configured to adjust the CWS according to whether data transmission on the physical uplink shared channel PUSCH and/or the physical uplink control channel PUCCH triggered by the downlink control instruction is detected.

In some embodiments, the adjustment module is configured to adjust the CWS according to the data transmission condition on the PUSCH and/or the PUCCH when the data transmission on the PUSCH or the PUCCH triggered by the downlink control instruction is detected.

In some embodiments, the adjusting module is configured to adjust the CWS according to a data transmission failure rate on PUSCH or PUCCH.

In some embodiments, the adjustment module is configured to increase the CWS when a data transmission failure rate on PUSCH or PUSCH triggered by the downlink control instruction is greater than a first threshold.

In some embodiments, the adjusting module is configured to adjust the CWS according to a random access condition on a random access channel triggered by the downlink control instruction when no data transmission on PUSCH and/or PUCCH triggered by the downlink control instruction is detected.

In some embodiments, the adjustment module is configured to increase the CWS when a proportion of users randomly accessing on the RACH triggered based on the downlink control instruction is less than a second threshold when random access on the RACH triggered by the downlink control instruction is detected.

In some embodiments, the adjustment module is configured to adjust the CWS according to a transmission condition of the reference signal triggered by the downlink control instruction when no data transmission on the PUSCH and/or PUCCH triggered by the downlink control instruction is detected.

In some embodiments, the adjustment module is configured to increase the CWS when a proportion of users transmitting reference signals based on the downlink control instruction is less than a third threshold.

In some embodiments, when the downlink control instruction is a downlink control instruction for triggering a change in terminal behavior, the adjustment module is configured to adjust the CWS according to a result of the change in terminal behavior triggered by the downlink control instruction.

In some embodiments, the adjusting module is configured to adjust the CWS according to a change result of the terminal behavior when no data transmission on the PUSCH and/or the PUCCH triggered by the downlink control instruction is detected.

In some embodiments, the adjustment module is configured to perform one of:

When detecting that the data transmission on the PUSCH is not triggered by the downlink control instruction and the random access on the RACH is not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

When detecting that the data transmission on the PUCCH is not triggered by a downlink control instruction and the random access on the RACH is not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

When detecting that the data transmission on the PUSCH and the PUCCH is not triggered by the downlink control instruction and the random access on the RACH is not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

When detecting that the data transmission on the PUSCH is not triggered by the downlink control instruction and the reference signal transmission is not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

When detecting that the data transmission on the PUCCH is not triggered by the downlink control instruction and the reference signal transmission is not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

When detecting that the data transmission on the PUSCH and the PUCCH is not triggered by the downlink control instruction and the reference signal transmission is not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior;

When detecting that no data transmission on the PUSCH is triggered by a downlink control instruction and no random access of the RACH and no reference signal transmission triggered by the downlink control instruction are triggered, adjusting the CWS according to a change result of the terminal behavior;

When detecting that no data transmission is triggered by a downlink control instruction on the PUCCH and no random access of the RACH is triggered by the downlink control instruction and no reference signal transmission is triggered by the downlink control instruction, adjusting the CWS according to a change result of the terminal behavior;

And when detecting that the data transmission on the PUSCH and the PUCCH is not triggered by the downlink control instruction and the random access of the RACH and the reference signal transmission triggered by the downlink control instruction are not triggered by the downlink control instruction, adjusting the CWS according to the change result of the terminal behavior.

In some embodiments, the adjusting module is configured to adjust the CWS according to an adjustment condition of the terminal to adjust the uplink transmission power according to the downlink control instruction.

In some embodiments, the adjusting module is configured to increase the CWS when the ratio of users that do not adjust the uplink transmission power according to the downlink control instruction reaches a fourth threshold.

In some embodiments, the apparatus further comprises:

And the issuing module is configured to issue indication information for triggering the adjustment of the CWS, wherein the indication information is used for indicating the base station to trigger the adjustment of the CWS based on the transmission condition of the code block CB, the code block group CBG or the transmission block TB.

The embodiment of the application provides a method (slot), a symbol (symbol), a subframe, a radio frame or other defined time unit-time CWS adjustment method for channel interception under the condition of adjusting a channel interception mechanism using cat4 on an unlicensed spectrum.

The reference transmission unit for adjusting the CWS is determined, and the reference transmission unit is described below as a time slot.

When there is no transmission of PDSCH on the reference resources used to adjust the CWS, the CWS is adjusted as follows.

When there is a downlink control instruction (e.g., UL grant) for uplink transmission and there is a PUSCH or PUCCH transmission, the base station adjusts the CWS based on the transmission situation on the PUSCH or PUCCH.

The base station adds indication information of the CWS adjustment based on the CB, CBG or TB level to the UL grant, wherein the indication information informs that the triggering of the CWS adjustment is based on the transmission status of the CB, CBG or TB.

After receiving the downlink control instruction, the terminal can utilize the downlink control instruction to adjust the CWS of the channel occupation time (Channel Occupancy Time, COT) initiated by the terminal.

The value of the contention window length is adjusted up when the ratio of the terms of unsuccessfully received transmissions on PUSCH or PUCCH (including incorrectly decoded or unreceived transmissions) by the base station is greater than a predefined threshold.

When there is a UL grant but there is no data transmission on PUSCH or PUCCH, and when the UL grant is for triggering random access on RACH, determining that the proportion of users that are not based on random access on RACH indicating triggering within a predefined window is greater than a certain threshold, then raising the value of the contention window length.

When there is a UL grant, but there is no PUSCH or PUCCH transmission, and the UL grant is used to trigger SRS transmission, it is determined that the proportion of users that do not trigger SRS or other reference signal transmission based on the indication is greater than a certain threshold within a predefined window, and then the value of the contention window length is increased.

When there is a UL grant, but there is no PUSCH or PUCCH transmission, the base station adjusts the window value of the CWS based on the behavior of the terminal.

When UL grant is used to adjust uplink power transmission of a terminal, it is determined whether or not a function of the terminal adjusts transmission power as instructed within a predefined observation window. If a predefined proportion (e.g., 80%) of the target terminals do not adjust the uplink transmit power as indicated, the contention window value is adjusted up.

The application provides how the channel access mechanism can accurately reflect the channel condition under the condition of different transmission conditions in the channel occupation initiated by the base station on the unlicensed spectrum, and ensures the fair occupation on the unlicensed spectrum.

The communication device provided in this embodiment includes: a transceiver, a memory, and a processor. Transceivers may be used to interact with other devices, including but not limited to transceiver antennas. The memory may store computer-executable instructions; the processor is respectively connected with the transceiver and the memory, so that the contention window length adjustment method provided by any technical scheme can be realized.

In an exemplary embodiment, a non-transitory computer readable storage medium including instructions, for example, a memory including instructions, where the instructions are executable by a processor, where the processor executes the instructions, and can implement the uplink control information processing method provided in any one of the foregoing technical solutions is provided.

Fig. 7 is a diagram illustrating a terminal, which may be embodied as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, etc., in accordance with an exemplary embodiment.

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

The processing component 802 generally controls overall operation of the terminal 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interactions 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.

The memory 804 is configured to store various types of data to support operations at the terminal 800. Examples of such data include instructions for any application or method operating on the terminal 800, contact data, phonebook data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile 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 disk.

The power supply component 806 provides power to the various components of the terminal 800. The 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 the terminal 800.

The multimedia component 808 includes a screen between the terminal 800 and the user that provides an output interface. 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 input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or sliding action, but also the duration and pressure associated with the touch or sliding operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the terminal 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 focal length and optical zoom capabilities.

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 terminal 800 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further includes a speaker for outputting audio signals.

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

The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the terminal 800. For example, the sensor assembly 814 may detect an on/off state of the terminal 800, a relative positioning of the assemblies, such as a display and keypad of the terminal 800, the sensor assembly 814 may also detect a change in position of the terminal 800 or one of the assemblies of the terminal 800, the presence or absence of user contact with the terminal 800, an orientation or acceleration/deceleration of the terminal 800, and a change in temperature of the terminal 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects 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 gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communication between the terminal 800 and other devices, either wired or wireless. The terminal 800 may access a wireless network based on a communication standard, such as Wi-Fi,2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one 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 terminal 800 can 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, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 804 including instructions executable by processor 820 of terminal 800 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

Fig. 8 is a schematic diagram of a base station. Referring to fig. 8, base station 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, 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, processing component 922 is configured to execute instructions to perform the PDCCH detection method illustrated in fig. 4 and/or 5.

Base station 900 may also include a power component 926 configured to perform power management for base station 900, a wired or wireless network interface 950 configured to connect base station 900 to a network, and an input output (I/O) interface 958. Base station 900 may operate based on an operating system stored in memory 932 such as Windows Server TM, mac OS XT M, unix TM, linux TM, free BSDTM, or the like.

Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A contention window length adjustment method, wherein the method is applied to a base station, the method comprising:

when a downlink control instruction exists on the unlicensed spectrum, adjusting the length CWS of the contention window according to the behavior execution condition triggered by the downlink control instruction; the downlink control instruction is used for triggering uplink transmission on the unlicensed spectrum and/or adjusting uplink transmission power of the terminal on the unlicensed spectrum;

When the unlicensed spectrum has a downlink control instruction, adjusting the contention window length CWS according to a behavior execution condition triggered by the downlink control instruction, including:

according to whether the downlink control instruction triggers data transmission on a Physical Uplink Shared Channel (PUSCH) and/or a Physical Uplink Control Channel (PUCCH), the CWS is adjusted;

Or alternatively

And adjusting the CWS according to the adjustment condition of the uplink transmission power adjusted by the terminal according to the downlink control instruction.

2. The method of claim 1, wherein the adjusting the CWS according to whether the downlink control instruction triggers data transmission on a physical uplink shared channel PUSCH and/or a physical uplink control channel PUCCH, comprises:

and when the downlink control instruction triggers data transmission on the PUSCH or the PUCCH, adjusting the CWS according to the data transmission condition on the PUSCH and/or the PUCCH.

3. The method of claim 2, wherein the adjusting the CWS according to data transmission conditions on the PUSCH and/or the PUCCH comprises:

And adjusting the CWS according to the data transmission failure rate on the PUSCH or the PUCCH.

4. The method of claim 3, wherein the adjusting the CWS according to a data transmission failure rate on the PUSCH or the PUCCH comprises:

And when the data transmission failure rate triggered by the downlink control instruction on the PUSCH or the PUSCH is greater than a first threshold value, increasing the CWS.

5. The method of claim 1, wherein the adjusting the CWS according to whether the downlink control instruction triggers data transmission on PUSC H and/or PUCCH comprises:

and when the downlink control instruction does not trigger the data transmission on the PUSCH and/or the PUCCH, adjusting the CWS according to whether the downlink control instruction triggers the random access condition on the random access channel RACH.

6. The method of claim 5, wherein the adjusting the CWS according to whether the downlink control instruction triggers a random access condition on a random access channel RACH comprises:

And when the downlink control instruction triggers random access on the RACH, increasing the CWS when the proportion of users which are triggered by the downlink control instruction and are randomly accessed on the RACH is smaller than a second threshold value.

7. The method of claim 1, wherein the adjusting the contention window length CW S according to whether the downlink control instruction triggers data transmission on a physical uplink shared channel PUSCH or a physical uplink control channel PUCCH comprises:

And when the downlink control instruction does not trigger data transmission on the PUSCH and/or the PUCCH, adjusting the CWS according to the transmission condition of the reference signal SRS triggered by the downlink control instruction.

8. The method of claim 7, wherein the adjusting the CWS according to the transmission condition of the reference signal triggered by the downlink control instruction comprises:

And increasing the CWS when the proportion of users transmitting the reference signal based on the downlink control instruction is smaller than a third threshold value.

9. The method of claim 1, wherein the adjusting the CWS according to whether the downlink control instruction triggers data transmission on a physical uplink shared channel PUSCH and/or a physical uplink control channel PUCCH, comprises:

and when the downlink control instruction does not trigger data transmission on the PUSCH and/or the PUCCH, adjusting the CWS according to the change result of the terminal behavior.

10. The method of claim 9, wherein the adjusting the CWS according to whether the downlink control instruction triggers data transmission on a physical uplink shared channel PUSCH and/or a physical uplink control channel PUCCH comprises one of:

When the downlink control instruction does not trigger data transmission on the PUSCH and/or the PUCCH and the downlink control instruction does not trigger random access of the RACH, the CWS is adjusted according to a change result of the terminal behavior;

When the downlink control instruction does not trigger data transmission on the PUSCH and/or the PUCCH and the downlink control instruction does not trigger reference signal transmission, adjusting the CWS according to a change result of the terminal behavior;

And when the downlink control instruction does not trigger data transmission on the PUSCH and/or the PUCCH, and the downlink control instruction does not trigger random access of the RACH and the downlink control instruction does not trigger reference signal transmission, adjusting the CWS according to a change result of the terminal behavior.

11. The method of claim 1, wherein the adjusting the CWS according to the adjustment status of the terminal to adjust the uplink transmission power according to the downlink control instruction comprises:

And when the proportion of the users of which the uplink transmission power is not adjusted by the terminal according to the downlink control instruction reaches a fourth threshold value, increasing the CWS.

12. The method of claim 1, wherein the method further comprises:

and issuing indication information triggering the adjustment of the CWS, wherein the indication information is used for indicating the base station to trigger the adjustment of the CWS based on the transmission condition of a code block CB, a code block group CBG or a transmission block TB.

13. A contention window length adjustment apparatus, wherein the apparatus is applied in a base station, the apparatus comprising:

The adjustment module is configured to adjust the contention window length CWS according to the behavior execution condition triggered by the downlink control instruction when the downlink control instruction exists on the unlicensed spectrum; the downlink control instruction is used for triggering uplink transmission on the unlicensed spectrum and/or adjusting uplink transmission power of the terminal on the unlicensed spectrum;

The adjustment module is specifically configured to adjust the CWS according to whether the downlink control instruction triggers data transmission on a physical uplink shared channel PUSCH and/or a physical uplink control channel PUCCH; or adjusting the CWS according to the adjustment condition of the uplink transmission power adjusted by the terminal according to the downlink control instruction.

14. The apparatus of claim 13, wherein the adjustment module is configured to adjust the CWS according to a data transmission condition on the PUSCH and/or the PUCCH when the downlink control instruction triggers a data transmission on the PUSCH or the PUCCH.

15. The apparatus of claim 14, wherein the adjustment module is configured to adjust the CWS according to a data transmission failure rate on the PUSCH or the PUCCH.

16. The apparatus of claim 15, wherein the adjustment module is configured to increase the CWS when a data transmission failure rate on the PUSCH or the PUSCH triggered by the downlink control instruction is greater than a first threshold.

17. The apparatus of claim 13, wherein the adjustment module is configured to adjust the CWS according to a random access condition on a random access channel RACH triggered by the downlink control instruction when the downlink control instruction does not trigger data transmission on PUSCH and/or PUCCH.

18. The apparatus of claim 17, wherein the adjustment module is configured to increase CWS when a proportion of users randomly accessed on the RACH triggered based on the downlink control instruction is less than a second threshold when the downlink control instruction has a randomly accessed on the RACH triggered.

19. The apparatus of claim 13, wherein the adjustment module is configured to adjust the CWS according to a transmission condition of a reference signal SRS triggered by the downlink control instruction when the downlink control instruction does not trigger data transmission on PUSCH and/or PUCCH.

20. The apparatus of claim 19, wherein the adjustment module is configured to increase the CWS when a proportion of users transmitting reference signals based on the downlink control instruction is less than a third threshold.

21. The apparatus of claim 13, wherein the adjustment module is configured to adjust the CWS according to a result of the change in the terminal behavior when the downlink control instruction does not trigger data transmission on PUSCH and/or PUCCH.

22. The apparatus of claim 21, wherein the adjustment module is configured to perform one of:

When the downlink control instruction does not trigger the data transmission on the PUSCH and the downlink control instruction does not trigger the random access of the RACH, the CWS is adjusted according to the change result of the terminal behavior;

when the downlink control instruction does not trigger data transmission on the PUCCH and the downlink control instruction does not trigger random access of the RACH, the CWS is adjusted according to a change result of the terminal behavior;

When the downlink control instruction does not trigger data transmission on the PUSCH and the PUCCH and the downlink control instruction does not trigger random access of the RACH, the CWS is adjusted according to a change result of the terminal behavior;

When the downlink control instruction does not trigger data transmission on the PUSCH and the downlink control instruction does not trigger reference signal transmission, adjusting the CWS according to a change result of the terminal behavior;

when the downlink control instruction does not trigger data transmission on the PUCCH and the downlink control instruction does not trigger reference signal transmission, adjusting the CWS according to a change result of the terminal behavior;

When the downlink control instruction does not trigger data transmission on the PUSCH and the PUCCH and the downlink control instruction does not trigger reference signal transmission, the CWS is adjusted according to the change result of the terminal behavior;

When the downlink control instruction does not trigger data transmission on the PUSCH and the downlink control instruction does not trigger random access of the RACH and reference signal transmission which is not triggered by the downlink control instruction, adjusting the CWS according to a change result of the terminal behavior;

When the downlink control instruction does not trigger data transmission on the PUCCH and the downlink control instruction does not trigger random access of the RACH and reference signal transmission which is not triggered by the downlink control instruction, adjusting the CWS according to a change result of the terminal behavior;

And when the downlink control instruction does not trigger data transmission on the PUSCH and the PUCCH, and the downlink control instruction does not trigger random access of the RACH and the downlink control instruction does not trigger reference signal transmission, adjusting the CWS according to a change result of the terminal behavior.

23. The apparatus of claim 13, wherein the adjustment module is configured to increase the CWS when a proportion of users for which the terminal does not adjust uplink transmit power according to the downlink control instruction reaches a fourth threshold.

24. The apparatus of claim 13, wherein the apparatus further comprises:

And the issuing module is configured to issue indication information for triggering the adjustment of the CWS, wherein the indication information is used for indicating the base station to trigger the adjustment of the CWS based on the transmission condition of a code block CB, a code block group CBG or a transmission block TB.

25. A communication device, comprising:

A transceiver;

a memory;

A processor, respectively connected to the transceiver and the memory, for controlling the transceiver to transmit and receive wireless signals by executing computer executable instructions stored on the memory, and implementing the contention window length adjustment method provided in any one of claims 1 to 12.

26. A computer storage medium storing computer executable instructions which, when executed by a processor, enable the contention window length adjustment method provided in any one of claims 1 to 12.