WO2020057259A1

WO2020057259A1 - Method and device for adjusting contention window size

Info

Publication number: WO2020057259A1
Application number: PCT/CN2019/097873
Authority: WO
Inventors: 鲁智; 姜蕾
Original assignee: 维沃移动通信有限公司
Priority date: 2018-09-19
Filing date: 2019-07-26
Publication date: 2020-03-26
Also published as: CN110933765A; CN110933765B

Abstract

Disclosed by the embodiments of the present disclosure are a method and device for adjusting contention window size (CWS). The method for adjusting CWS comprises: determining a reference time slot, the reference time slot being before a listen-before-talk (LBT) time, and the reference time slot being used to adjust the CWS of a CW; acquiring response information of a physical downlink shared channel (PDSCH) in the reference time slot; and adjusting the CWS according to the response information.

Description

Method and device for adjusting competition window size

Cross-reference to related applications

This application claims the priority of Chinese Patent Application No. 201811095164.1 filed in China on September 19, 2018, the entire contents of which are hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communications, and in particular, to a method and device for adjusting the contention window size.

Background technique

Compared with the previous mobile communication system, the fifth generation (5G) mobile communication system needs to adapt to more diverse scenarios and business requirements. The main scenarios of 5G include Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mMTC), and High-Reliable Low-Latency Communications (URLLC). These scenarios require high reliability, low latency, large bandwidth, and wide coverage of the system.

At present, in an unlicensed spectrum scenario, after a user-side equipment (UE) receives a physical downlink shared channel (PDSCH) sent by a network-side device, the time for sending response information to the network-side device is not constant. It is also a fixed time, which can be adjusted according to demand to achieve flexible feedback of response information. In addition, in an unlicensed spectrum scenario, a network-side device is allowed to send multiple PDSCHs to a UE in the same time slot.

Based on the above changes, the previous method for adjusting the contention window (Contention Window Size, CWS) of the contention window (CW) is no longer applicable. Therefore, it is urgent to provide a CWS adjustment method suitable for unlicensed spectrum scenarios. .

Summary of the Invention

The purpose of the embodiments of the present disclosure is to provide a method and device for adjusting the contention window size CWS to adjust the contention window size CWS in an unlicensed spectrum scenario, thereby improving the utilization efficiency of an unlicensed frequency band.

To achieve the above object, in a first aspect, an embodiment of the present disclosure provides a method for adjusting a contention window size CWS, which is applied to a network-side device, including:

Determining a reference time slot, which is used to adjust the contention window size CWS of the contention window CW before the reference time slot is heard before the LBT moment before the session;

Acquiring response information of a physical downlink shared channel PDSCH in the reference time slot;

Adjusting the CWS according to the response information.

In a second aspect, an embodiment of the present disclosure provides a network-side device, including:

A time slot determining unit, configured to determine a reference time slot, where the reference time slot is used to adjust the contention window size CWS of the contention window CW before the reference time slot is heard before the LBT moment;

An information obtaining unit, configured to obtain response information of a physical downlink shared channel PDSCH in the reference time slot;

A parameter adjustment unit, configured to adjust the CWS according to the response information.

According to a third aspect, an embodiment of the present disclosure provides a network-side device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is processed by the processor. When the processor executes, the steps of the method according to the first aspect are implemented.

According to a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to the first aspect is implemented. A step of.

Through the method and device for adjusting the CWS of the contention window size provided by the embodiments of the present disclosure, it is possible to determine a reference slot located before the LBT moment, obtain PDSCH response information in the reference slot, and adjust the CWS based on the response information, so In the unlicensed spectrum scenario, the CWS is adjusted to improve the utilization efficiency of the unlicensed frequency band.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments of the present disclosure and the description thereof are used to explain the present disclosure, and do not constitute an improper limitation on the present disclosure. In the drawings:

FIG. 1 is a schematic diagram of a CWS adjustment method according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of obtaining response information of a PDSCH in a reference slot according to an embodiment of the present disclosure; FIG.

FIG. 3 is a schematic diagram of acquiring response information of a PDSCH in a reference slot according to another embodiment of the present disclosure; FIG.

4 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided by an embodiment of the present disclosure;

5 is a schematic diagram of a module composition of a network-side device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a network-side device according to an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present disclosure. The use of "and / or" in the specification and claims indicates at least one of the connected objects.

The technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as: Global System (Mobile), Global Communications (GSM), Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access Address (Wideband Code Division Multiple Access, WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A), New Air Interface (New Radio, NR) and so on.

User-side equipment, which can also be called user terminal, mobile terminal (mobile terminal), mobile user equipment, etc., can communicate with one or more core networks via a radio access network (e.g., Radio Access Network, RAN), The user-side device may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal. For example, it may be a portable, compact, handheld, computer-built or vehicle-mounted mobile device. Radio access networks exchange languages and / or data.

Network-side equipment, used to communicate with user-side equipment, can be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolutionary base station in LTE (Evolutional NodeB, eNB or e-NodeB) and 5G base station (gNB), the embodiments of the present disclosure are not limited, but for the convenience of description, the following embodiments take gNB as an example for illustration.

Considering that the previous CWS adjustment method is not applicable to the unlicensed spectrum scenario, the embodiments of the present disclosure provide a CWS adjustment method and device to adjust the CWS in the unlicensed spectrum scenario and improve the utilization efficiency of the unlicensed frequency band. The technical solutions provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

The English abbreviations involved in the embodiments of the present disclosure are as follows

Listen before conversation (Listen Before Talk, LBT);

Acknowledgement (ACK);

Non-acknowledgement (Negative Acknowledgement, NACK);

Discontinuous Transmission (DTX).

FIG. 1 is a schematic diagram of a CWS adjustment method according to an embodiment of the present disclosure. The method may be applied to a network-side device and executed by the network-side device. As shown in Figure 1, the method includes the following steps:

Step 102: Determine a reference time slot, where the reference time slot is before the LBT time, and the reference time slot is used to adjust the CWS of the CW;

Step 104: Obtain response information of the PDSCH in the reference slot.

Step 106: Adjust the CWS according to the response information.

It can be seen that, through the embodiments of the present disclosure, a reference slot located before the LBT moment can be determined, and the PDSCH response information in the reference slot can be obtained, and the CWS can be adjusted according to the response information, so that the unlicensed spectrum scenario is based on the reference slot method Adjust CWS to improve the utilization efficiency of unlicensed frequency bands.

In one embodiment, in step 102, determining the reference time slot may be:

(a1) determining at least one time slot occupied by a downlink transmission before the LBT moment and closest to the LBT moment;

(a2) Among the at least one time slot, a time slot used for transmitting the PDSCH first is used as a reference time slot.

In this method, first, a downlink transmission before the LBT time and closest to the LBT time is determined, and at least one time slot occupied by the latest downlink transmission is determined. Among them, the "nearest" in the "last downlink transmission" can be understood as the meaning of the shortest time from the LBT moment. Then, a slot in which the PDSCH is transmitted first among the at least one slot is used as a reference slot. Among them, "first" refers to the first in chronological order.

In this method, since the reference time slot is determined in at least one time slot occupied by a downlink transmission closest to the LBT time and closest to the LBT time, the reference time slot is located before the LBT time.

In another embodiment, in step 102, determining the reference time slot may be:

(b1) determining the first time slot before the LBT time and closest to the LBT time for transmitting the response information of the PDSCH;

(b2) acquiring PDSCH response information in the first time slot;

(b3) determining the corresponding target response information with the smallest k1 value from the obtained response information;

(b4) determining a target PDSCH corresponding to the target response information;

(b5) using the second time slot for transmitting the target PDSCH as a reference time slot;

The k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the PDSCH response information in the third time slot.

In the above action (b1), the response information of the PDSCH is sent from the user-side device to the network-side device. First, a first time slot for transmitting PDSCH response information before the LBT time and closest to the LBT time is determined, and the PDSCH response information sent by the user-side device to the network-side device in the first time slot is obtained.

Then, in the obtained response information, the corresponding target response information with the smallest k1 value is determined, where the k1 value refers to a time slot between a third time slot for transmitting the PDSCH and a fourth time slot for transmitting the response information of the PDSCH. Quantity.

Finally, after obtaining the target response information, a target PDSCH corresponding to the target response information is determined, and a second time slot for transmitting the target PDSCH is used as a reference time slot.

In this method, because the first time slot is located before the LBT time, the target response information is sent through the first time slot, and the reference time slot is the time slot of the target PDSCH corresponding to the transmission target response information, so the reference time slot is located before the first time slot. , Which is before the LBT moment.

After the reference time slot is determined, the PDSCH response information in the reference time slot is obtained, and the CWS is adjusted according to the response information. The PDSCH in the reference time slot refers to the PDSCH that the network-side device sends to the user-side device in the reference time slot, and the PDSCH response information refers to the user-side device's response information to the PDSCH.

In this embodiment, when the network-side device transmits at least one PDSCH to the user-side device in the reference time slot, obtaining response information of the PDSCH in the reference time slot may be: obtaining response information of the user-side device to all or part of the PDSCH received.

For example, in the reference time slot, the network-side device sends at least one PDSCH to a user-side device, and then obtaining the response information of the user-side device to all or part of the received PDSCH may be: obtaining the response information of the user-side device to all the received PDSCH. Or, obtaining the response information of the user-side device to the received PDSCH.

For another example, in the reference time slot, the network-side device sends at least one PDSCH to multiple user-side devices, and then obtaining the response information of all or part of the PDSCH received by the user-side device may be: obtaining all the received pairs of each user-side device. PDSCH response information, or obtaining response information of each user-side device to part of the PDSCH received, or obtaining response information of some user-side devices to all received PDSCH, and obtaining the remaining part of the user-side device to received PDSCH response information.

In this embodiment, acquiring the response information of the user equipment to the received partial PDSCH may be: acquiring the response information of the user side equipment to the PDSCH with the lowest start symbol index among the multiple received PDSCHs. The PDSCH with the lowest start symbol index is the PDSCH received first by the user-side device.

FIG. 2 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided by an embodiment of the present disclosure. As shown in FIG. 2, in a reference slot, a network-side device sends one PDSCH to UE1 and three PDSCHs to UE2. . When acquiring the response information of the PDSCH in the reference time slot, the response information of UE1 to the received PDSCH may be obtained, and the response information of UE2 to the three PDSCHs received may be obtained. Information to regulate CWS.

FIG. 3 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided by another embodiment of the present disclosure. As shown in FIG. 3, in a reference slot, a network-side device sends two PDSCHs to UE1, and sends three PDSCHs to UE2. PDSCH. When acquiring the response information of the PDSCH in the reference slot, the response information of UE1 to the first PDSCH received may be obtained, and the response information of UE2 to the first PDSCH received may be obtained. According to the obtained two response information, , Adjust CWS.

In this embodiment, the network-side device in the reference time slot transmits at least one PDSCH to multiple UEs. When obtaining response information of the PDSCH in the reference time slot, only the reference time slot may be obtained due to timing feedback of the response information. The response information of some UEs in the UE cannot obtain the response information of other UEs in the reference time slot. In this case, the CWS is adjusted based on the acquired response information, and the unobtained response information is ignored.

FIG. 4 is a schematic diagram of obtaining response information of a PDSCH in a reference slot provided in an embodiment of the present disclosure. As shown in FIG. 4, in a reference slot, a network-side device sends a PDSCH to UE1 and a PDSCH to UE2. When obtaining the response information of the PDSCH in the reference slot, if only the response information of the PDSCH for the UE2 is obtained, and the response information of the PDSCH for the UE1 is not obtained, the CWS is adjusted according to the response information of the PDSCH for the PDSCH and the UE1 is ignored Response information for PDSCH.

In this embodiment, adjusting the CWS according to the acquired response information may be as follows: In the response information, the number of the proportion of the NACK information is counted, and the CWS is adjusted according to the amount of the proportion.

Specifically, the PDSCH response information may be ACK information or NACK information. After obtaining the response information, the number of NACK information is counted in the response information, and the CWS is adjusted according to the number of the proportion.

In a specific embodiment, there is a correspondence between the access priority of the currently used channel and the value allowed by the CWS. Table 1 shows a schematic view of the values allowed by the CWS. As shown in Table 1, when the access priority P of the currently used channel is 1, the allowed values of the CWS are 3 and 7, and the currently used channel When the access priority level P is 2, the allowed values of CWS are 7 and 15, and so on. It can be understood that the allowed values of the CWS shown in Table 1 are only used as a schematic description, and do not indicate specific restrictions.

Table 1

When adjusting the CWS according to the amount of NACK information, in one case, if the amount of NACK information in the response message is greater than or equal to a preset ratio threshold, and the current value of CWS is not the value of the currently used channel The maximum value allowed for the access priority level will adjust the value of CWS to the next higher value allowed for the access priority level of the currently used channel. For example, in Table 1, the access priority of the currently used channel is level 1 and the current value of CWS is 3. If the number of NACK information in the response information in the reference slot is greater than or equal to a preset ratio threshold For example, 80%, you can adjust the value of CWS to 7.

In another case, if the number of NACK messages in the response message is greater than or equal to a preset ratio threshold, and the current value of CWS is the maximum value allowed by the access priority of the currently used channel, the CWS is maintained. The value does not change. For example, in Table 1, the access priority of the currently used channel is level 1 and the current value of CWS is 7. If the number of NACK information in the response information in the reference slot is greater than or equal to the preset ratio threshold If, for example, 80%, the value of CWS remains unchanged.

In another case, if the ratio of the number of NACK messages in the response message is less than the preset ratio threshold, and the current value of CWS is not the minimum allowed by the access priority of the currently used channel, then The current value of CWS is adjusted to the minimum value allowed by the access priority level of the currently used channel. For example, in Table 1, the access priority of the currently used channel is level 1 and the current value of CWS is 7. If the number of NACK information in the response information in the reference slot is less than the preset ratio threshold, For example, 80%, you can adjust the value of CWS to 3.

In another case, if the proportion of the NACK information in the response message is less than the preset ratio threshold, and the current value of CWS is the minimum value allowed by the access priority of the currently used channel, the CWS is maintained The value does not change. For example, in Table 1, the access priority of the currently used channel is level 1 and the current value of CWS is 3. If the number of NACK information in the response information in the reference time slot is less than the preset ratio threshold, For example, 80%, keep the value of CWS unchanged.

Considering that the UE may not receive the scheduling of the network-side device or because the interfering network-side device does not receive the PDSCH response information of the UE, the network-side device may treat the UE's PDSCH response information as the DTX state. In the case where the network-side device does not receive the UE response information for the PDSCH, the network-side device may use DXT as NACK information for statistics. It should be noted that, for one PDSCH, the network-side device only counts DXT as one NACK information, so as to avoid repeated statistical problems caused by the UE after successfully responding to the PDSCH with response information.

Of course, in other embodiments, the network-side device may not perform statistics on the DXT as NACK information. Whether to count DXT as NACK information may depend on the specific implementation scenario and specific implementation requirements of this embodiment, and is not limited here.

In summary, through the embodiments of the present disclosure, a reference time slot can be determined, and the CWS can be adjusted according to the PDSCH response information in the reference time slot, so that in an unlicensed spectrum scenario, the CWS is adjusted according to the interference situation or channel situation of the UE. Conducive to improving the utilization efficiency of unlicensed frequency bands.

Corresponding to the CWS adjustment method provided by the foregoing embodiment, an embodiment of the present disclosure provides a network-side device. FIG. 5 is a schematic diagram of a module composition of a network-side device according to an embodiment of the present disclosure. As shown in FIG. 5, the network-side device include:

A time slot determining unit 51, configured to determine a reference time slot, which is used to adjust the contention window size CWS of the contention window CW before the reference time slot is used to listen to the LBT moment before the session;

An information acquiring unit 52, configured to acquire response information of a physical downlink shared channel PDSCH in the reference time slot;

A parameter adjusting unit 53 is configured to adjust the CWS according to the response information.

Optionally, the time slot determining unit 51 is specifically configured to:

Determining at least one time slot occupied by a downlink transmission before the LBT moment and closest to the LBT moment;

Among the at least one time slot, a time slot used for transmitting the PDSCH first is used as the reference time slot.

Optionally, the time slot determining unit 51 is specifically configured to:

Determining a first time slot before the LBT time and closest to the LBT time and used to transmit the response information of the PDSCH;

Acquiring response information of the PDSCH in the first time slot;

Determining the corresponding target response information with the smallest k1 value from the obtained response information;

Determining a target PDSCH corresponding to the target response information;

Using a second time slot for transmitting the target PDSCH as a reference time slot;

The k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the first time slot. PDSCH response information in three time slots.

Optionally, the network-side device transmits at least one PDSCH to the user-side device in the reference slot; the information acquisition unit 52 is specifically configured to:

Obtain response information of the user side device to all or part of the PDSCH received.

Optionally, the information obtaining unit 52 is further specifically configured to:

Obtain response information of the user-side device to the PDSCH with the lowest start symbol index among the multiple received PDSCHs.

Optionally, the parameter adjustment unit 53 is specifically configured to:

In the response information, the proportion of the number of non-acknowledgment NACK information is counted;

Adjusting the CWS according to the quantity proportion.

Optionally, the parameter adjustment unit 53 is further specifically used for one of the following:

If the number ratio is greater than or equal to the proportional threshold, and the current value of the CWS is the maximum value allowed by the access priority level of the currently used channel, the value of the CWS is maintained unchanged;

If the number ratio is greater than or equal to the proportional threshold, and the current value of the CWS is not the maximum value, the value of the CWS is adjusted to the next allowed higher priority of the access priority of the currently used channel. High value

If the number ratio is less than the proportional threshold and the current value of the CWS is the minimum value allowed by the access priority level of the currently used channel, the value of the CWS is kept unchanged; or

If the quantity ratio is less than the proportional threshold, and the current value of the CWS is not the minimum value, the current value of the CWS is adjusted to the minimum value.

Through the embodiments of the present disclosure, a reference time slot located before the LBT moment can be determined, and PDSCH response information in the reference time slot can be obtained, and the CWS can be adjusted according to the response information, thereby adjusting in the unlicensed spectrum scenario based on the reference time slot mode. CWS to improve the utilization efficiency of unlicensed bands.

The network-side device provided by the embodiment of the present disclosure can implement the processes implemented by the network-side device in the foregoing method embodiments, and implement the functions of the network-side device in the foregoing method embodiments, and achieve the same effect, which are not described herein again.

Corresponding to the CWS adjustment method provided by the foregoing embodiment, an embodiment of the present disclosure provides a network-side device. FIG. 6 is a schematic structural diagram of a network-side device according to an embodiment of the present disclosure. As shown in FIG. 6, the network-side device 1200 It includes a processor 1201, a transceiver 1202, a memory 1203, a user interface 1204, and a bus interface.

In the embodiment of the present disclosure, the network-side device 1200 further includes a computer program stored in the memory 1203 and executable on the processor 1201. When the computer program is executed by the processor 1201, the following steps are implemented:

Adjusting the CWS according to the response information.

In FIG. 6, the bus architecture may include any number of interconnected buses and bridges, and one or more processors specifically represented by the processor 1201 and various circuits of the memory represented by the memory 1203 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and therefore, this embodiment will not be described further. The bus interface provides an interface. The transceiver 1202 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. For different user-side devices, the user interface 1204 may also be an interface that can be externally connected to the required device. The connected devices include, but are not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1201 is responsible for managing the bus architecture and general processing, and the memory 1203 may store data used by the processor 1201 when performing operations.

Optionally, when the computer program stored in the memory 1203 is executed by the processor 1201, the determining a reference time slot includes:

Acquiring response information of the PDSCH in the first time slot;

Determining a target PDSCH corresponding to the target response information;

Optionally, when the computer program stored in the memory 1203 is executed by the processor 1201, the network-side device in the reference time slot transmits at least one of the PDSCH to the user-side device; and acquiring the physical downlink share in the reference time slot The channel PDSCH response information includes:

Optionally, when the computer program stored in the memory 1203 is executed by the processor 1201, acquiring the response information of the user equipment to the PDSCH received in part includes:

Optionally, when the computer program stored in the memory 1203 is executed by the processor 1201, the adjusting the CWS according to the response information includes:

Adjusting the CWS according to the quantity proportion.

Optionally, when the computer program stored in the memory 1203 is executed by the processor 1201, the adjusting the CWS according to the proportion of the quantity includes one of the following:

The network-side device 1200 provided in the embodiment of the present disclosure can implement the processes implemented by the network-side device in the foregoing method embodiments, and implement the functions of the network-side device in the foregoing method embodiments, and achieve the same effect, which is not described again .

An embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium, such as a read-only memory (Read Only Memory, ROM), a random storage Access memory (Random Access Memory, RAM), magnetic disks or optical discs. When the computer program is executed by a processor, the following processes can be implemented:

Adjusting the CWS according to the response information.

Optionally, when the computer program is executed by a processor, the determining a reference time slot includes:

Acquiring response information of the PDSCH in the first time slot;

Determining a target PDSCH corresponding to the target response information;

Optionally, when the computer program is executed by a processor, the network-side device in the reference time slot transmits at least one PDSCH to the user-side device; and the response for acquiring the PDSCH of the physical downlink shared channel in the reference time slot is obtained. Information, including:

Optionally, when the computer program is executed by the processor, obtaining the response information of the user equipment to the received PDSCH includes:

Optionally, when the computer program is executed by a processor, adjusting the CWS according to the response information includes:

Adjusting the CWS according to the quantity proportion.

Optionally, when the computer program is executed by a processor, the adjusting the CWS according to the quantity proportion includes one of the following:

When the computer program stored in the storage medium provided by the embodiment of the present disclosure is executed by a processor, each process of the embodiment of the method for adjusting the competition window size CWS in the method embodiment can achieve the same technical effect, and to avoid repetition, here is not More details.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this embodiment may be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. A professional technician may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

In the several embodiments provided by the embodiments of the present disclosure, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the technical solutions of the embodiments of the present disclosure.

In addition, each functional unit in each of the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present disclosure is essentially a part that contributes to the existing technology or a part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium. Including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage media include: U disks, mobile hard disks, ROMs, RAMs, magnetic disks, or compact discs, which can store program codes.

The above are only specific implementations of the embodiments of the present disclosure, but the scope of protection of the embodiments of the present disclosure is not limited to this. Any person skilled in the art can easily make changes within the technical scope disclosed in the embodiments of the present disclosure. Any change or replacement is considered to be covered by the protection scope of the embodiments of the present disclosure. Therefore, the protection scope of the embodiments of the present disclosure shall be subject to the protection scope of the claims.

Claims

A contention window size CWS adjustment method is applied to a network-side device, wherein the contention window size CWS adjustment method includes:

Determining a reference time slot, which is used to adjust the contention window size CWS of the contention window CW before the reference time slot is heard before the LBT moment before the session;

Acquiring response information of a physical downlink shared channel PDSCH in the reference time slot;

Adjusting the CWS according to the response information.
The method according to claim 1, wherein said determining a reference time slot comprises:

Determining at least one time slot occupied by a downlink transmission before the LBT moment and closest to the LBT moment;

Among the at least one time slot, a time slot used for transmitting the PDSCH first is used as the reference time slot.
The method according to claim 1, wherein said determining a reference time slot comprises:

Determining a first time slot before the LBT time and closest to the LBT time and used to transmit the response information of the PDSCH;

Acquiring response information of the PDSCH in the first time slot;

Determining the corresponding target response information with the smallest k1 value from the obtained response information;

Determining a target PDSCH corresponding to the target response information;

Using a second time slot for transmitting the target PDSCH as a reference time slot;

The k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the first time slot. PDSCH response information in three time slots.
The method according to any one of claims 1 to 3, wherein in the reference time slot, the network-side device transmits at least one PDSCH to the user-side device; and acquiring the physical downlink shared channel in the reference time slot PDSCH response information, including:

Obtain response information of the user side device to all or part of the PDSCH received.
The method according to claim 4, wherein obtaining user equipment response information to a part of the PDSCH received comprises:

Obtain response information of the user-side device to the PDSCH with the lowest start symbol index among the multiple received PDSCHs.
The method according to any one of claims 1 to 3, wherein adjusting the CWS according to the response information comprises:

In the response information, the proportion of the number of non-acknowledgment NACK information is counted;

Adjusting the CWS according to the quantity proportion.
The method according to claim 6, wherein the adjusting the CWS according to the quantity proportion comprises one of the following:

If the number ratio is greater than or equal to the proportional threshold, and the current value of the CWS is the maximum value allowed by the access priority level of the currently used channel, the value of the CWS is maintained unchanged;

If the number ratio is greater than or equal to the proportional threshold, and the current value of the CWS is not the maximum value, the value of the CWS is adjusted to the next allowed higher priority of the access priority of the currently used channel. High value

If the number ratio is less than the proportional threshold and the current value of the CWS is the minimum value allowed by the access priority level of the currently used channel, the value of the CWS is kept unchanged; or

If the quantity ratio is less than the proportional threshold, and the current value of the CWS is not the minimum value, the current value of the CWS is adjusted to the minimum value.
A network-side device includes:

A time slot determining unit, configured to determine a reference time slot, where the reference time slot is used to adjust the contention window size CWS of the contention window CW before the reference time slot is heard before the LBT moment;

An information obtaining unit, configured to obtain response information of a physical downlink shared channel PDSCH in the reference time slot;

A parameter adjustment unit, configured to adjust the CWS according to the response information.
The device according to claim 8, wherein the time slot determining unit is specifically configured to:

Determining at least one time slot occupied by a downlink transmission before the LBT moment and closest to the LBT moment;

Among the at least one time slot, a time slot used for transmitting the PDSCH first is used as the reference time slot.
The device according to claim 8, wherein the time slot determining unit is specifically configured to:

Determining a first time slot before the LBT time and closest to the LBT time and used to transmit the response information of the PDSCH;

Acquiring response information of the PDSCH in the first time slot;

Determining the corresponding target response information with the smallest k1 value from the obtained response information;

Determining a target PDSCH corresponding to the target response information;

Using a second time slot for transmitting the target PDSCH as a reference time slot;

The k1 value is used to indicate the number of time slots between the third time slot and the fourth time slot, the third time slot is used to transmit the PDSCH, and the fourth time slot is used to transmit the first time slot. PDSCH response information in three time slots.
The device according to any one of claims 8 to 10, wherein in the reference time slot, the network-side device transmits at least one PDSCH to the user-side device; and the information obtaining unit is specifically configured to:

Obtain response information of the user side device to all or part of the PDSCH received.
The device according to claim 11, wherein the information acquisition unit is further configured to:

Obtain response information of the user-side device to the PDSCH with the lowest start symbol index among the multiple received PDSCHs.
The device according to any one of claims 8 to 10, wherein the parameter adjustment unit is specifically configured to:

In the response information, the proportion of the number of non-acknowledgment NACK information is counted;

Adjusting the CWS according to the quantity proportion.
The device according to claim 13, wherein the parameter adjustment unit is further specifically used for one of the following:

If the number ratio is greater than or equal to the proportional threshold, and the current value of the CWS is the maximum value allowed by the access priority level of the currently used channel, the value of the CWS is maintained unchanged;

If the number ratio is greater than or equal to the proportional threshold, and the current value of the CWS is not the maximum value, the value of the CWS is adjusted to the next allowed higher priority of the access priority of the currently used channel. High value

If the number ratio is less than the proportional threshold and the current value of the CWS is the minimum value allowed by the access priority level of the currently used channel, the value of the CWS is kept unchanged; or

If the quantity ratio is less than the proportional threshold, and the current value of the CWS is not the minimum value, the current value of the CWS is adjusted to the minimum value.
A network-side device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, the device implements the preceding claims 1 to 1 Steps of the method of any of 7.
A computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of the method according to any one of claims 1 to 7 above.