CN112584517A

CN112584517A - UCI transmission method, LBT execution method, device, terminal equipment and medium

Info

Publication number: CN112584517A
Application number: CN202010203399.9A
Authority: CN
Inventors: 付景兴; 喻斌; 王轶; 孙霏菲
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecom R&D Center; Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2019-09-30
Filing date: 2020-03-20
Publication date: 2021-03-30

Abstract

The application provides a UCI transmission method, an LBT execution method, a device, a terminal device and a medium, wherein the execution method comprises the following steps: acquiring indication information; determining an uplink LBT sub-band for transmitting the SRS according to the indication information; and LBT is carried out on the determined uplink LBT sub-band. Based on the scheme provided by the embodiment of the application, when SRS transmission is performed on an unlicensed frequency band, a frequency band resource for SRS transmission can be determined, and LBT is performed on the determined frequency band resource, so that SRS transmission can be performed further based on the determined LBT result of the LBT sub-frequency band, and mutual interference between different communication systems is avoided.

Description

UCI transmission method, LBT execution method, device, terminal equipment and medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a transmission method of UCI, an execution method of LBT, an apparatus, a terminal device, and a computer-readable storage medium.

Background

In an NR (New Radio) air interface system, the bandwidth of a carrier is relatively large, and some UEs (User equipments) have limited bandwidth capabilities and can only transmit or receive control information and data within a part of the frequency domain bandwidth of the carrier, while some UEs have relatively strong bandwidth capabilities and can transmit or receive control information and data within the entire frequency domain bandwidth of the carrier. The bandwidth capability of the UE refers to a maximum bandwidth that the UE can receive or transmit data in the frequency domain at the same time. For example, some UEs have a bandwidth capability of 20 mhz, and some UEs have a bandwidth capability of 5 mhz. For a UE with poor Bandwidth capability, in order to improve the frequency diversity performance of the UE, multiple restricted bands may be configured for the UE, so that the UE may operate in the restricted bands with good performance at different times, and we call one restricted band as a Bandwidth Part (BWP), that is, the UE may receive and/or transmit control information and/or data in different BWPs at different times.

With the growing and sharp contradiction between the outbreak of the demand of users for broadband wireless services and the scarcity of spectrum resources, mobile operators have begun to consider unlicensed frequency bands (also called unlicensed frequency bands) as a supplement to licensed frequency bands. The third Generation Partnership Project (3GPP, 3rd Generation Partnership Project) has determined a scheme of effective carrier aggregation through an unlicensed frequency band and a licensed frequency band (license band), and effectively improves the utilization rate of a whole network spectrum on the premise of ensuring that other technologies of the unlicensed frequency band are not obviously affected.

Unlicensed frequency bands have typically been allocated for some other purpose, such as radar or 802.11-series Wireless Fidelity (WiFi). Thus, the interference level in the unlicensed band has uncertainty, which results in that the Quality of Service (QoS) of LTE transmission is generally difficult to guarantee, but the unlicensed band can be used for data transmission with low QoS requirement. Here, a Long-term Evolution (LTE) system of a secondary cell deployed on an unlicensed band is referred to as a Licensed Assisted Access (LAA) system. In the unlicensed frequency band, how to avoid mutual interference between the LAA system and other wireless systems such as radar or WiFi is a key problem. Clear Channel Assessment (CCA) is a collision avoidance mechanism commonly employed in unlicensed bands. A mobile Station (STA) must detect the radio channel before transmitting a signal, and can occupy the radio channel to transmit a signal only when it detects that the radio channel is free. LAA also follows a similar mechanism to ensure that interference with other signals is small. The LAA device (e.g. base station or user terminal) switches dynamically according to the carrier monitoring result, that is, it sends when it detects that the channel is idle, and does not send if the channel is busy.

In the NR system, the UE is configured with a resource for transmitting a Sounding Reference Signal (SRS) on an active BWP. In the unlicensed band, Listen Before Transmit (LBT) is performed Before SRS transmission, and the SRS can be transmitted only when the LBT result is Idle (Idle), otherwise, transmission is not allowed. How to determine the frequency domain bandwidth for LBT for SRS transmission is a problem to be solved.

For transmission of UCI (Uplink Control Information), UCI may be transmitted in a PUCCH (Physical Uplink Control Channel) or in a PUSCH (Physical Uplink Shared Channel). When UCI is transmitted in PUSCH, UCI is demodulated using DMRS (Demodulation Reference Signal) of PUSCH, that is, DMRS for demodulating UCI and DMRS for demodulating data transmitted in PUSCH are multiplexed with the same DMRS, but this method may possibly result in that Demodulation performance of UCI cannot be guaranteed or affect performance of PUSCH.

Disclosure of Invention

The present application aims to provide a UCI transmission method, an LBT execution method, an apparatus, a terminal device, and a computer-readable storage medium, based on which demodulation performance of UCI can be well guaranteed, and based on which the execution method can determine frequency domain resources for SRS transmission, and perform LBT on the determined frequency domain resources, so as to perform SRS transmission based on LBT results.

In a first aspect, an embodiment of the present application provides a method for transmitting UCI, where the method includes:

determining a DMRS for demodulating UCI transmitted in a PUSCH;

and transmitting the UCI or the indication information of the UCI in the PUSCH based on the determined DMRS for demodulating the UCI.

In a second aspect, an embodiment of the present application provides an apparatus for transmitting UCI, the apparatus including at least one processor configured to:

determining a DMRS for demodulating UCI transmitted in a PUSCH;

In a third aspect, an embodiment of the present application provides a method for performing LBT, where the method includes:

acquiring indication information;

determining an uplink LBT sub-band for transmitting the SRS according to the indication information;

and LBT is carried out on the determined uplink LBT sub-band. In a fourth aspect, an embodiment of the present application provides an apparatus for performing LBT, where the apparatus includes:

an uplink sub-band determining module, configured to obtain the indication information, and determine, according to the indication information, an uplink LBT sub-band for transmitting the SRS;

and the LBT executing module is used for carrying out LBT on the determined uplink LBT sub-band.

In a fifth aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a memory and a processor; wherein the memory has stored therein a computer program; the processor is configured to execute the method provided by the first aspect or the second aspect of the embodiments of the present application when executing the computer program stored in the memory.

In a sixth aspect, the present application provides a computer-readable storage medium, where a computer program is stored in the storage medium, and when the computer program is executed by a processor, the processor executes the method provided in the first aspect or the second aspect of the present application.

The beneficial effect that technical scheme that this application provided brought is: the method, the device, the terminal device and the computer-readable storage medium for performing LBT provided in the embodiments of the present application solve the problem of how to implement SRS transmission in an unlicensed frequency band, and based on the scheme, a frequency domain resource used for SRS transmission before SRS transmission in the unlicensed frequency band can be determined, that is, an uplink LBT subband for SRS transmission, so that LBT can be further performed on the determined frequency domain resource, and SRS transmission can be performed based on an LBT result of the determined uplink LBT subband.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.

Fig. 1 is a schematic flowchart of an LBT execution method according to an embodiment of the present application;

fig. 2 is a schematic diagram of a downlink LBT sub-band and an uplink LBT sub-band configured by a base station to a UE by using a higher layer signaling according to an example of the present application;

fig. 3 is a schematic diagram of a scheme for determining an uplink LBT subband for SRS transmission based on a downlink LBT subband idle in BWP according to an example of the present application;

fig. 4 is a schematic diagram illustrating a scheme for determining an uplink LBT subband corresponding to a downlink LBT subband with a specified frequency domain position in a downlink LBT subband idle in a BWP as an uplink LBT subband for SRS transmission according to an example of the present application;

fig. 5 is a schematic diagram of a scheme for determining, as an uplink LBT subband to transmit an SRS, a corresponding uplink LBT subband to a downlink LBT subband where a PDCCH is located and an idle LBT downlink subband continuous to the downlink LBT subband provided in an example of the present application;

fig. 6 is a schematic structural diagram illustrating an apparatus for performing LBT according to an embodiment of the present application;

fig. 7 is a schematic diagram illustrating resources occupied by DMRS and UCI in PUSCH in an example of the present application;

fig. 8 shows a schematic diagram of resources occupied by DMRS and UCI in PUSCH in another example of the present application;

fig. 9 shows a schematic diagram of resources occupied by DMRS and UCI in PUSCH in still another example of the present application;

fig. 10 shows a schematic diagram of resources occupied by DMRS and UCI in PUSCH in still another example of the present application;

fig. 11 is a schematic diagram illustrating a resource occupied by indication information of UCI in PUSCH in an example of the present application;

fig. 12 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 shows a flowchart of an LBT execution method provided in an embodiment of the present application, where the method may be executed by a UE, and as shown in fig. 1, the method may mainly include the following steps:

step S110: and acquiring the indication information.

The indication information is specifically information for determining an uplink LBT subband (a frequency band resource for transmitting the SRS) for transmitting the SRS. The LBT sub-band refers to one or more sub-bands included in the bandwidth of BWP in the unlicensed band. The bandwidth of a BWP typically includes at least two upstream LBT sub-bands. This BWP in the embodiments of the present application refers to an active BWP. Since SRR transmission is performed in the unlicensed frequency band, LBT needs to be performed on an uplink LBT subband used for SRS transmission (i.e., subband resources occupied by SRS during SRS transmission) before SRS transmission.

In the embodiment of the present application, the indication information may be display information or implicit information.

Step S120: and determining the uplink LBT sub-band for transmitting the SRS according to the indication information.

Step S130: and LBT is carried out on the determined uplink LBT sub-band.

Specifically, after the uplink LBT sub-band for SRS transmission is determined, LBT may be performed on the frequency domain resources of one or more determined uplink LBT sub-bands, so as to perform SRS transmission according to the LBT result.

In a wireless communication system, the SRS is used for a base station to estimate information such as uplink channel quality of different frequency bands. In an unlicensed frequency band, to avoid mutual interference between an LAA system and other wireless systems, the UE needs to perform LBT on subbands used for SRS transmission before transmitting SRS on an activated BWP, and the SRS can be transmitted on the subbands only when the result of LBT is idle. However, BWP may include multiple uplink LBT sub-bands, and therefore, which uplink LBT sub-band or bands to be occupied by the SRS resource that needs LBT before SRS transmission needs to be determined first.

The SRS may be an aperiodic SRS or a periodic SRS. The periodic SRS may be configured through Radio Resource Control (RRC), and the aperiodic SRS is usually triggered through Downlink Control information carried in a PDCCH, specifically, through an SRS request field in the PDCCH (Physical Downlink Control Channel).

In an optional embodiment of the present application, for the aperiodic SRS, the SRS is triggered by an SRS request field in a PDCCH, specifically, may be driven and triggered by an SRS request field in a PDCCH that schedules a PDSCH (Physical Downlink Shared Channel), may be driven and triggered by an SRS request field in a PDCCH that schedules a PUSCH (Physical Uplink Shared Channel), and may also be triggered by an SRS request field in a dedicated PDCCH that is specifically used for triggering the aperiodic SRS.

The SRS transmission method provided in the embodiment of the present application may determine, under the condition that the bandwidth of the BWP includes at least two uplink LBT subbands, one or more LBT subbands for SRS transmission, specifically, before SRS transmission, the uplink LBT subbands for SRS transmission are determined according to indication information used for determining the uplink LBT subbands for SRS transmission, and then LBT may be performed on the determined uplink LBT subbands, and whether to transmit the SRS is performed according to an LBT result.

Specifically, the SRS transmission according to the LBT result includes:

if the LBT result is idle, sending the SRS;

if the LBT result is not idle, the SRS is not transmitted.

If the LBT result is Idle (i.e., Idle), it indicates that the uplink LBT subband for transmitting the SRS is Idle, and may be used to transmit the SRS, whereas if the LBT result is not Idle (i.e., busy), the SRS cannot be transmitted on the uplink LBT subband for transmitting the SRS, so as to avoid interference with other wireless systems.

It should be noted that, in practical applications, different schemes may be configured to determine the uplink LBT sub-band for transmitting the SRS, and therefore, the indication information may be different for different configuration schemes. The following description will be made in conjunction with specific embodiments provided in the examples of the present application.

In an optional embodiment of the present application, the SRS is an aperiodic SRS, and the indication information in step S110 may specifically include at least one of the following:

the downlink LBT sub-band where the PDCCH is located, the indication information carried in the PDCCH, and the idle downlink LBT sub-band in the BWP (base station configured for the UE).

It is understood that the above-mentioned configured BWP refers to the BWP in the active state in the configured BWP.

As can be seen from the foregoing description, the PDCCH may be a PDCCH for scheduling a PDSCH, a PDCCH for scheduling a PUSCH, or a dedicated PDCCH.

If the PDCCH is a PDCCH for scheduling the PDSCH or a dedicated PDCCH, the indication information carried in the PDCCH may specifically include a value of an SRS request field and/or a value of a field for indicating an uplink LBT subband for transmitting the SRS.

If the PDCCH is a PDCCH for scheduling PUSCH, the indication information carried in the PDCCH comprises at least one of the following items:

a value of an SRS request field; information indicating an uplink LBT subband for transmitting a PUSCH; a value of a field indicating an uplink LBT subband for transmitting the SRS.

Specifically, when the UE needs to send uplink PUSCH data, the base station allocates uplink resources to the UE and issues the uplink resources to the UE through the PDCCH, so that the UE can send PUSCH data on the uplink resources specified by the base station. In the unlicensed frequency band, before the UE transmits PUSCH data, the UE also needs to perform LBT on an uplink LBT subband for transmitting PUSCH, and when an aperiodic SRS is triggered by a PDCCH for scheduling PUSCH, the PDCCH may carry information of the uplink LBT subband (i.e., the uplink LBT subband for transmitting PUSCH) that needs LBT before transmitting PUSCH data, which is indicated by the base station, so that if SRS transmission is triggered by an SRS request field in the PDCCH at this time, a scheme may be configured to determine the uplink LBT subband for transmitting SRS according to the uplink LBT subband for transmitting PUSCH data. By adopting the method, the uplink LBT sub-band for transmitting the SRS is determined, the SRS can provide channel measurement signals for uplink PUSCH transmission which is possibly sent, and meanwhile, the indication information can be saved.

It can be seen that, in the scheme provided in the embodiment of the present application, for the aperiodic SRS triggered by the PDCCH scheduling PDSCH or the dedicated PDCCH, the uplink LBT sub-band that needs to be LBT before transmitting the SRS is the uplink LBT sub-band for transmitting the SRS, may be determined by at least one of the four factors of a downlink LBT sub-band where a PDCCH including an SRS request field is located, a downlink LBT sub-band where an LBT result within BWP is idle (i.e., sub-band idle), an SRS request field, and a field indicating an uplink LBT sub-band for transmitting SRS, for the aperiodic SRS triggered by the PDCCH for scheduling the PUSCH, the SRS may be determined by at least one of the five factors, i.e., the downlink LBT subband where the PDCCH including the SRS request field is located, the downlink LBT subband where the LBT result in BWP is idle, the SRS request field, the uplink LBT subband for transmitting the PUSCH, and a field for indicating the uplink LBT subband for transmitting the SRS.

In an optional embodiment of the present application, the indication information may include a value of a downlink LBT sub-band where the PDCCH is located and a value of an SRS request field, and at this time, in step S120, determining, according to the indication information, an uplink LBT sub-band for transmitting the SRS, specifically, the determining may include:

determining an uplink LBT sub-band for transmitting the SRS according to the downlink LBT sub-band where the PDCCH is located, the value of the SRS request field and the first mapping relation;

the first mapping relationship is a mapping relationship between each downlink LBT subband, each value (i.e., each SRS request field value), and each uplink LBT subband.

It should be noted that the mapping relationship among the downlink LBT sub-bands, the values, and the uplink LBT sub-bands may be a one-to-one mapping relationship, a one-to-many mapping relationship, or a many-to-many mapping relationship. For example, one downlink LBT subband and one value may correspond to one LBT subband, or one downlink LBT subband and one value may correspond to multiple LBT subbands, that is, a set of LBT subbands, where the set may include identifications of multiple LBT subbands.

Specifically, in practical applications, the first mapping relationship may be preconfigured, and when the terminal device needs to transmit the SRS, the terminal device may determine, according to the mapping relationship, one or more corresponding LBT sub-bands according to a downlink LBT sub-band where a PDCCH triggering the SRS transmission is located and a value of an SRS request field in the PDCCH.

By adopting the method, the LBT sub-band for sending the SRS can be flexibly determined through the value of the SRS request field, and meanwhile, the indication information can be saved. And determining the LBT sub-band for sending the SRS according to the downlink LBT sub-band where the PDCCH is located, wherein the probability that the LBT sub-band for sending the SRS is idle is increased according to the downlink LBT sub-band where the PDCCH is located because the downlink LBT sub-band where the PDCCH is located is idle.

It is understood that the PDCCH in this scheme may be a PDCCH scheduling a PDSCH, a PDCCH scheduling a PUSCH, or a dedicated PDCCH for triggering an aperiodic SRS.

With reference to specific examples, a scheme for determining an LBT subband for transmitting an SRS based on a downlink LBT subband where a PDCCH is located and a value of an SRS request field is further described below.

Examples of the invention

In this example, an example in which the aperiodic SRS is triggered by an SRS request field in a PDCCH that schedules a PDSCH is described. For transmitting an aperiodic SRS in an unlicensed frequency band, a UE needs to perform LBT on an uplink LBT subband used for transmitting the SRS before transmitting the aperiodic SRS, the SRS can be transmitted only if an LBT result is idle, otherwise, the SRS cannot be transmitted, and a BWP may include a plurality of uplink LBT subbands, so that a bandwidth for performing LBT, that is, a frequency domain resource including which uplink LBT subbands need to be determined first, specifically, the number and the position of the uplink LBT subbands occupied by the SRS resource for performing LBT, that is, the uplink LBT subbands used for transmitting the SRS, need to be determined before transmitting the SRS.

In this example, assume that the base station configures 3 uplink LBT sub-bands for the UE, which are: an uplink LBT sub-band I, an uplink LBT sub-band II and an uplink LBT sub-band III, wherein the 3 uplink sub-bands belong to a BWP of a serving cell; the base station configures 4 downlink LBT sub-bands for the UE, which are: downlink LBT subband one, downlink LBT subband two, downlink LBT subband three, and downlink LBT subband four, as shown in fig. 2.

Assuming that a downlink LBT sub-band where a PDCCH (physical downlink control channel) containing an SRS request field is located is a first downlink LBT sub-band, an uplink LBT sub-band set occupied by SRS resources configured by a high-level signaling is as follows:

the first set of uplink LBT subbands is { first uplink LBT subband }, i.e., the first set includes first uplink LBT subband;

the second set of LBT subbands is { uplink LBT subband one, uplink LBT subband two }, i.e., the second set includes uplink LBT subband one and uplink LBT subband two;

the third LBT subband set is { uplink LBT subband one, uplink LBT subband two, uplink LBT subband three }, i.e., the third LBT subband set includes uplink LBT subband one, uplink LBT subband two, and uplink LBT subband three.

Assume that the first mapping relationship is shown in table 1 below:

TABLE 1

As can be seen from table 1, when the value of the SRS request field in the PDCCH (the SRS request field value shown in the figure) is not "00", the SRS request field triggers the aperiodic SRS, that is, the aperiodic SRS needs to be transmitted, at this time, an uplink LBT subband set for transmitting the SRS, that is, an uplink LBT subband occupied by SRS resources, may be determined based on the downlink LBT subband where the PDCCH is located and the value of the SRS request field through the above mapping relationship, and the uplink LBT subband included in the set is a subband that needs to be LBT.

In another example, suppose that the base station configures 5 uplink LBT sub-bands for the UE, which are: the method comprises the following steps that (1) an uplink LBT sub-band I, an uplink LBT sub-band II, an uplink LBT sub-band III, an uplink LBT sub-band IV and an uplink LBT sub-band V are adopted, and the 5 uplink sub-bands belong to one BWP of one serving cell; the base station configures 4 downlink LBT sub-bands for the UE, which are: a first downlink LBT sub-band, a second downlink LBT sub-band, a third downlink LBT sub-band, and a fourth downlink LBT sub-band.

It is assumed that a first downlink LBT subband and a first uplink LBT subband belong to a pair, the frequency domain positions are the same, a second downlink LBT subband and a second uplink LBT subband belong to a pair, the frequency domain positions are the same, a third downlink LBT subband and a third uplink LBT subband belong to a pair, the frequency domain positions are the same, a fourth downlink LBT subband and a fourth uplink LBT subband belong to a pair, and the frequency domain positions are the same, that is, the first downlink LBT subband corresponds to the first uplink LBT subband, the second downlink LBT subband corresponds to the second uplink LBT subband, the third downlink LBT subband corresponds to the third uplink LBT subband, and the fourth downlink LBT subband corresponds to the fourth uplink LBT subband.

Assume that the first mapping relationship in this another example is shown in table 2 below, where the first set of LBT subbands occupied by the SRS resource in table 2, the second set of LBT subbands, …, and the set of LBT subbands are uplink LBT subband sets configured by the base station through higher layer signaling, and each set may include one or more uplink LBT subbands. As shown in table 2, assuming that the downlink LBT subband where the PDCCH triggering SRS is located is the downlink subband two, and the value of the SRS request field in the PDCCH (the SRS request field value shown in the table) is 11, the uplink LBT subband for transmitting the SRS is each uplink LBT subband included in the LBT subband set four, that is, a subband that needs to be LBT.

TABLE 2

It should be noted that the mapping relationships shown in table 1 and table 2 are only an example, and in practical applications, different configurations and adjustments may be performed according to actual needs, and specifically, corresponding mapping relationships may be configured according to each uplink LBT sub-band, downlink LBT sub-band, and uplink LBT sub-band set occupied by SRS resources configured by a base station for a UE actually. The mapping relationship may be determined by a protocol agreement or the UE according to a received high-level instruction or a physical-layer instruction.

It can be understood that the schemes in the above embodiments or examples are also applicable to the aperiodic SRS triggered by the SRS request field in the PDCCH scheduling the PUSCH and the aperiodic SRS transmission triggered by the SRS request field in the dedicated PDCCH, and only the downlink LBT subband where the PDCCH scheduling the PDSCH is located in the above examples needs to be replaced by the downlink LBT subband where the PDCCH scheduling the PUSCH is located, or the PDCCH scheduling the PDSCH needs to be replaced by the LBT subband where the dedicated PDCCH is located.

In an optional embodiment of the present application, the indication information in step S110 may include a downlink LBT subband idle in BWP, and determining the uplink LBT subband to transmit the SRS according to the indication information includes:

determining an uplink LBT sub-band corresponding to the idle downlink LBT sub-band as the uplink LBT sub-band for transmitting the SRS;

alternatively, the first and second electrodes may be,

and determining an uplink LBT sub-band corresponding to a downlink LBT sub-band satisfying a predetermined condition in the idle downlink LBT sub-bands as the uplink LBT sub-band for transmitting the SRS.

That is to say, there may be a predetermined or preconfigured correspondence between the uplink LBT sub-band and the downlink LBT sub-band, at this time, before SRS transmission, according to the known idle downlink LBT sub-band in the BWP, the uplink LBT sub-band for SRS transmission may be determined according to the idle downlink LBT sub-band, for example, directly determining the uplink LBT sub-band corresponding to the idle downlink LBT sub-band as the uplink LBT sub-band for SRS transmission, or determining the uplink LBT sub-band corresponding to some LBT sub-bands satisfying the predetermined condition in the idle downlink LBT sub-band as the uplink LBT sub-band for SRS transmission.

Optionally, a pair of corresponding uplink LBT sub-band and downlink LBT sub-band may specifically refer to an uplink LBI sub-band and a downlink LBT sub-band located in the same frequency domain position.

Wherein the idle downlink LBT sub-band as a result of LBT within BWP (i.e. idle downlink LBT sub-band within BWP) may be determined by receiving group common control signaling. The specific downlink LBT sub-band may be specifically determined by which downlink LBT sub-bands are predetermined between the UE and the base station, or may be determined by the UE based on information (such as a high layer signaling or a physical layer signaling) received from the base station.

In an optional embodiment of the present application, the downlink LBT sub-band that meets the predetermined condition may specifically be M sub-bands located at a specified frequency domain position in the idle downlink LBT sub-band, where M is greater than or equal to 1.

Specifically, the specific location of the specified frequency domain location may be configured according to actual requirements, specifically may be agreed by the UE and the base station, or may be determined by the UE according to related indication information received from the base station, for example, determined according to a higher layer signaling or a physical signaling received from the base station.

As an alternative, the specified frequency domain position may be a position in the bandwidth that is forward of the frequency domain position, or some particular position. For example, the frequency domain position of the idle downlink LBT subband is the first downlink LBT subband.

In an alternative embodiment of the present application, M ≧ 2, the M subbands may be M subbands with consecutive frequency domain positions.

That is, the downlink LBT sub-band satisfying the predetermined condition may be M consecutive sub-bands located at a predetermined frequency domain position in the idle downlink LBT sub-band, for example, M consecutive sub-bands located at a frequency domain position before in the idle downlink LBT sub-band in BWP, and if M is 2, 2 consecutive downlink LBT sub-bands located at a frequency domain position before. By adopting the method, the LBT sub-band for sending the SRS is determined according to the downlink LBT sub-band where the PDCCH is located and the idle downlink LBT sub-band, because the downlink LBT sub-band where the PDCCH is located is idle, the probability that the LBT sub-band for sending the SRS is idle determined according to the PDCCH is increased, and the indication information can be saved.

The following further describes, with reference to a specific example, a scheme for determining an uplink LBT subband for SRS transmission according to a downlink LBT subband idle in BWP.

Examples of the invention

For transmitting the aperiodic SRS in the unlicensed frequency band, since the UE needs to perform LBT on an uplink LBT subband used for transmitting the SRS before transmitting the SRS, the SRS may be transmitted only if an LBT result is idle, otherwise, the SRS may not be transmitted, and the uplink LBT subband occupied by the SRS resource for performing LBT before transmitting the SRS may be determined according to a downlink LBT subband whose LBT result is idle in BWP (where the downlink LBT subband whose LBT result is idle in BWP may be determined by receiving a group common control signaling).

It is assumed that an uplink LBT subband for transmitting SRS, i.e., an LBT subband occupied by SRS resources (i.e., an uplink LBT subband), is an uplink LBT subband corresponding to an LBT subband in a BWP whose LBT result is an idle downlink LBT subband set or a downlink LBT subband in a subset of the set.

For example, the base station configures 3 uplink LBT sub-bands for the UE, which are: an uplink LBT sub-band I, an uplink LBT sub-band II and an uplink LBT sub-band III, wherein the 3 uplink sub-bands belong to a BWP of a serving cell; the base station configures 4 downlink LBT sub-bands for the UE, which are: the first downlink LBT subband, the second downlink LBT subband, the third downlink LBT subband and the fourth downlink LBT subband are sequentially ordered according to the four downlink LBT subbands before and after the frequency domain position as follows: a first downlink LBT sub-band, a second downlink LBT sub-band, a third downlink LBT sub-band, and a fourth downlink LBT sub-band. It is assumed that the first downlink LBT subband and the first uplink LBT subband belong to a pair, the frequency domain positions are the same, the second downlink LBT subband and the second uplink LBT subband belong to a pair, the frequency domain positions are the same, the third downlink LBT subband and the third uplink LBT subband belong to a pair, and the frequency domain positions are the same, that is, the first downlink LBT subband corresponds to the first uplink LBT subband, the second downlink LBT subband corresponds to the second uplink LBT subband, and the third downlink LBT subband corresponds to the third uplink LBT subband.

In one example, it is assumed that the BWP intra-LBT subband set with an idle LBT result is { downlink LBT subband one, downlink LBT subband three }, that is, the idle downlink LBT subbands are downlink LBT subband one and downlink LBT subband three, and if the BWP intra-LBT subband is an uplink LBT subband corresponding to the downlink LBT subband in the BWP intra-LBT subband set with an idle LBT result, in this example, the uplink LBT subband one and uplink LBT subband three corresponding to the downlink LBT subband one and downlink LBT subband three are uplink LBT subbands for transmitting SRS. As shown in fig. 3, of the sub-bands shown in the figure, the downlink sub-band shown by the filled rectangle is an idle downlink LBT sub-band, and accordingly, the uplink LBT sub-band corresponding to the idle downlink LBT sub-band (the uplink LBT sub-band with the filling in the figure) is an uplink LBT sub-band for transmitting SRS.

In another example, assuming that the set of free downlink LBT subbands is { downlink LBT subband one, downlink LBT subband three } as the LBT result in BWP, if the uplink LBT subband for SRS transmission (i.e. the LBT subband occupied by the SRS resource for LBT before SRS transmission) is the uplink LBT subband corresponding to the first subband before the frequency domain of the free downlink LBT subband, then the uplink LBT subband for SRS transmission is the uplink LBT subband one corresponding to the first downlink LBT subband. As shown in fig. 4, the free downlink LBT subband is the downlink LBT subband with padding shown in the figure, and the uplink LBT subband corresponding to the downlink LBT subband is the uplink LBT subband for transmitting SRS.

In another example, assuming that the set of downlink LBT subbands with the LBT result being idle in BWP is { downlink LBT subband one, downlink LBT subband two, and downlink LBT subband four }, if the uplink LBT subband for SRS transmission (i.e. the LBT subband occupied by the SRS resource that is LBT before SRS transmission) is an uplink LBT subband corresponding to two consecutive subbands with earlier frequency domain positions in the idle downlink LBT subband, then the uplink LBT subband for SRS transmission is an uplink LBT subband one and an uplink LBT subband two corresponding to the downlink LBT subband one and the downlink LBT subband two at this time.

In an optional embodiment of the present application, the step S110 includes that the indication information includes values of an idle downlink LBT subband in the BWP and an SRS request field, and determining the uplink LBT subband for SRS transmission according to the indication information includes:

determining an uplink LBT sub-band for transmitting the SRS according to the idle downlink LBT sub-band, the value of the SRS request field and the second mapping relation;

the second mapping relationship is a mapping relationship between each downlink sub-band, each value (i.e., each SRS request field value), and each uplink LBT sub-band.

Similarly, the mapping relationship among the downlink LBT sub-bands, the values, and the uplink LBT sub-bands may be a one-to-one mapping relationship, a one-to-many mapping relationship, or a many-to-many mapping relationship. For example, one downlink LBT subband and one value may correspond to one LBT subband, or one downlink LBT subband and one value may correspond to a plurality of LBT subbands, that is, to one LBT set, where the set may include identifiers of a plurality of LBT subbands, or a plurality of downlink LBT subbands and one value may correspond to one or more uplink LBT subbands.

As an example, table 3 shows a partial mapping relationship in the second mapping relationship, and as can be seen from the table, the table specifically shows a corresponding relationship between an idle downlink LBT subband set, a value of an SRS request field (SRS request field value in the table), and a downlink LBT subband for SRS transmission (LBT subband occupied by SRS resources for LBT before SRS transmission in the table).

TABLE 3

Based on the mapping relationship, assuming that the LBT result in BWP is that the idle downlink LBT sub-band is downlink LBT sub-band one and downlink LBT sub-band two, and the SRS request field in PDCCH has a value of 01, then the LBT sub-band for transmitting SRS is uplink LBT sub-band one.

In an optional embodiment of the application, the step S110 includes that the indication information includes a downlink LBT sub-band idle in the BWP and a downlink LBT sub-band where the PDCCH is located, and determining, according to the indication information, an uplink LBT sub-band for transmitting the SRS, including:

and determining an uplink LBT sub-band corresponding to the downlink LBT sub-band where the PDCCH in the idle downlink LBT sub-band is located and/or an uplink LBT sub-band corresponding to the downlink LBT sub-band where the PDCCH in the idle downlink LBT sub-band is located meets a specific frequency domain position relationship as the uplink LBT sub-band for transmitting the SRS.

That is, the uplink LBT subband corresponding to the downlink LBT subband where the PDCCH triggering the aperiodic SRS is located in the idle downlink LBT subband may be determined as the uplink LBT subband for transmitting the SRS. The downlink LBT sub-band corresponding to the downlink LBT sub-band in the idle downlink LBT sub-band that satisfies a certain relationship with the downlink LBT sub-band where the PDCCH triggering the aperiodic SRS is located, may also be determined as the uplink LBT sub-band for transmitting the SRS.

The specific frequency domain position relationship may be configured according to actual requirements, specifically may be agreed by the UE and the base station, or may be configured from the base station to the UE. As an optional manner, the specific frequency domain positional relationship may be a downlink LBT sub-band continuous to the downlink LBT sub-band where the PDCCH is located, and in this case, in order to transmit the SRS, the uplink LBT sub-band may be an uplink LBT sub-band corresponding to the downlink LBT sub-band where the PDCCH is located in the idle downlink LBT sub-band, and/or an uplink LBT sub-band corresponding to the downlink LBT sub-band continuous to the downlink LBT sub-band where the PDCCH is located in the idle downlink LBT sub-band.

As an example, assume that the base station configures 3 uplink LBT sub-bands for the UE, which are: an uplink LBT sub-band I, an uplink LBT sub-band II and an uplink LBT sub-band III, wherein the 3 uplink sub-bands belong to a BWP of a serving cell; the base station configures 4 downlink LBT sub-bands for the UE, which are: the first downlink LBT sub-band, the second downlink LBT sub-band, the third downlink LBT sub-band and the fourth downlink LBT sub-band, wherein the first downlink LBT sub-band and the first uplink LBT sub-band belong to a pair, the frequency domain positions are the same, the second downlink LBT sub-band and the second uplink LBT sub-band belong to a pair, the frequency domain positions are the same, the third downlink LBT sub-band and the third uplink LBT sub-band belong to a pair, and the frequency domain positions are the same.

In this example, assuming that the LBT result in the BWP is an idle downlink LBT subband set, which is { downlink LBT subband two, downlink LBT subband three }, and the downlink LBT subband where the PDCCH including the SRS request field is located is downlink LBT subband two, as an optional way, if the uplink LBT subband for transmitting the SRS is an uplink LBT subband corresponding to the downlink LBT subband where the PDCCH in the idle downlink LBT subband is located, then the LBT subband for transmitting the SRS is the uplink LBT subband two corresponding to the downlink LBT subband two at this time; as another optional manner, assume that the uplink LBT sub-band for transmitting the SRS includes an uplink LBT sub-band corresponding to the downlink LBT sub-band where the PDCCH is located in the idle downlink LBT sub-band and an uplink LBT sub-band corresponding to the downlink LBT sub-band continuous to the downlink LBT sub-band where the PDCCH is located in the idle downlink LBT sub-band, at this time, the downlink LBT sub-band where the PDCCH is located is downlink LBT sub-band two, the downlink LBT sub-band continuous to the frequency domain position of the downlink LBT sub-band two in the idle downlink LBT sub-band is downlink LBT sub-band three, the uplink LBT sub-band for transmitting the SRS is the uplink LBT sub-band two and the uplink LBT sub-band three corresponding to the downlink LBT sub-band two and the downlink LBT sub-band three, as shown in fig. 5, the uplink LBT sub-band indicated by the filled rectangular box is a vacant LBT sub-band, and the uplink LBT sub-band indicated by the filled rectangular box is an uplink LBT sub-band for transmitting SRS.

In an optional embodiment of the present application, the step S110 includes a value of a field for indicating an uplink LBT subband used for transmitting the SRS, and determining the uplink LBT subband used for transmitting the SRS according to the indication information includes:

determining the uplink LBT sub-band for transmitting the SRS according to the value of the field for indicating the uplink LBT sub-band for transmitting the SRS and the third mapping relation; the third mapping relationship is a mapping relationship between each value (i.e., each value of a field for indicating an uplink LBT subband for transmitting the SRS) and each uplink LBT subband.

As an optional manner, a field dedicated to indicate an uplink LBT subband used for transmitting the SRS is configured in the PDCCH including the SRS request field, and according to a value of the field and the third mapping relationship, the uplink LBT subband needed to transmit the SRS can be determined, that is, the uplink LBT subband occupied by the SRS resource is indicated by the uplink LBT subband field occupied by the SRS resource in the PDCCH including the SRS request field. Similarly, in the third mapping relationship, the mapping relationship between each value and each uplink LBT subband may be a one-to-one correspondence relationship or a one-to-many mapping relationship. By adopting the method, the uplink LBT sub-band for transmitting the SRS can be flexibly and directly indicated.

As an example, table 4 shows a third mapping relationship, as shown in the table, when a value of a field in the PDCCH for indicating an uplink LBT subband for transmitting an SRS (an uplink LBT subband field indication value occupied by SRS resources shown in the table) is 00, the corresponding uplink LBT subband for transmitting the SRS (the uplink LBT subband required to be LBT before SRS transmission shown in the table) may be a subband included in a set of one.

TABLE 4

It should be noted that, in practical applications, the number of bytes occupied by the field used for indicating the uplink LBT subband to be LBT before SRS transmission and the specific form of the value of the field are shown in table 4, which is not limited in this embodiment of the application, and table 4 is only an optional example given for ease of understanding.

In an optional embodiment of the present application, the step S110 includes information for indicating an uplink LBT subband used for transmitting a PUSCH, and determining the uplink LBT subband used for transmitting an SRS according to the information, including:

and determining the uplink LBT sub-band for transmitting the PUSCH according to the information for indicating the uplink LBT sub-band for transmitting the PUSCH, and determining the uplink LBT sub-band for transmitting the PUSCH as the uplink LBT sub-band for transmitting the SRS.

Before the PUSCH is transmitted, LBT needs to be performed on the uplink LBT subband occupied by the PUSCH, that is, the uplink LBT subband for transmitting the PUSCH, so when the SRS is triggered by the PDCCH scheduling the PUSCH, the uplink LBT subband for transmitting the PUSCH may be used as the uplink LBT subband for transmitting the SRS.

As an example, assuming that the uplink LBT subbands indicated in the PDCCH scheduling the PUSCH for transmitting the PUSCH are uplink LBT subband one and uplink LBT subband two, and the PDCCH scheduling the PUSCH drives aperiodic SRS transmission, the uplink LBT subbands for transmitting the aperiodic SRS may be uplink LBT subband one and uplink LBT subband two.

Based on the same principle as the SRS transmission method provided in the embodiment of the present application, an apparatus for performing LBT is further provided in the embodiment of the present application, as shown in fig. 6, the apparatus 100 for performing LBT may include an uplink sub-band determining module 110 and an LBT performing module 120. Wherein:

an uplink sub-band determining module 110, configured to obtain the indication information, and determine, according to the indication information, an uplink LBT sub-band for transmitting the SRS;

an LBT performing module 120, configured to perform LBT on the determined uplink LBT subband.

Optionally, the apparatus may further include an SRS transmission module, where the SRS transmission module is configured to transmit the SRS according to the LBT result.

Optionally, the SRS is an aperiodic SRS or a periodic SRS.

Optionally, the SRS is an aperiodic SRS triggered by an SRS request field in the PDCCH; the indication information may include at least one of:

the downlink LBT sub-band where the PDCCH is located, the indication information carried in the PDCCH, and the idle downlink LBT sub-band in the BWP.

Optionally, the PDCCH includes any one of:

scheduling a PDCCH of the PDSCH;

scheduling a PDCCH of a PUSCH;

a dedicated PDCCH for triggering an aperiodic SRS;

if the PDCCH is a PDCCH for scheduling the PDSCH or a dedicated PDCCH, the indication information carried in the PDCCH comprises a value of an SRS request field and/or a value of a field used for indicating an uplink LBT sub-band for transmitting the SRS;

a value of an SRS request field;

information indicating an uplink LBT subband for transmitting a PUSCH;

a value of a field indicating an uplink LBT subband for transmitting the SRS.

Optionally, the indication information includes values of a downlink LBT subband where the PDCCH is located and an SRS request field, and the uplink subband determining module 110 is specifically configured to:

determining an uplink LBT sub-band for transmitting the SRS according to the downlink LBT sub-band where the PDCCH is located, the value of the SRS request field and the first mapping relation; wherein, the first mapping relationship is the mapping relationship among each downlink LBT sub-band, each value, and each uplink LBT sub-band.

Optionally, the indication information includes a downlink LBT sub-band idle in the BWP, and the uplink sub-band determining module 110 is specifically configured to:

alternatively, the first and second electrodes may be,

Optionally, the downlink LBT sub-band that meets the predetermined condition includes any one of:

m sub-bands located at the specified frequency domain position in the idle downlink LBT sub-bands, wherein M is larger than or equal to 1.

Optionally, M is greater than or equal to 2, and the M subbands are M subbands with continuous frequency domain positions.

Optionally, the indication information includes values of an idle downlink LBT subband and an SRS request field in the BWP, and the uplink subband determining module 110 is specifically configured to:

wherein, the second mapping relationship is the mapping relationship among each downlink LBT sub-band, each value, and each uplink LBT sub-band.

Optionally, the indication information includes a downlink LBT sub-band idle in the BWP and a downlink LBT sub-band where the PDCCH is located, and the uplink sub-band determining module 110 is specifically configured to:

Optionally, the indication information includes a value of a field used for indicating an uplink LBT subband used for transmitting the SRS, and the uplink subband determining module 110 is specifically configured to:

determining the uplink LBT sub-band for transmitting the SRS according to the value of the field for indicating the uplink LBT sub-band for transmitting the SRS and the third mapping relation;

wherein, the third mapping relationship is the mapping relationship between each value and each uplink LBT subband.

Optionally, the indication information includes information for indicating an uplink LBT subband used for transmitting PUSCH, and the uplink subband determining module 110 is specifically configured to:

Optionally, the SRS transmission module 130 is specifically configured to:

if the LBT result is idle, sending the SRS;

if the LBT result is not idle, the SRS is not transmitted.

In another aspect of the present application, UCI may be transmitted in PUSCH, that is, UCI may be multiplexed in PUSCH, that is, on resources after DMRS of PUSCH, as shown in fig. 7, where the horizontal axis in the figure represents time domain resources of PUSCH, and the vertical axis represents frequency domain resources of PUSCH, UCI may use resources after resources used for transmitting DMRS in PUSCH (that is, DMRS symbols of PUSCH shown in the figure), and DMRS transmitted in PUSCH at this time is used for demodulation of PUSCH (that is, demodulation of data transmitted in PUSCH) and also for demodulation of UCI.

However, in an actual application scenario, there are some cases that the transmission of UCI is not multiplexed on a resource close to a DMRS of a PUSCH (i.e., a DMRS for demodulating a PUSCH) but multiplexed on a resource far from the DMRS of the PUSCH, and at this time, if the UCI is multiplexed on the DMRS of the PUSCH, the demodulation performance of the UCI may be poor, and in order to ensure the demodulation performance of the UCI, an embodiment of the present application further provides a transmission method of the UCI, where the method may include:

step S1: determining a DMRS for demodulating UCI transmitted in a PUSCH;

step S2: and transmitting the UCI or the indication information of the UCI in the PUSCH based on the determined DMRS for demodulating the UCI.

The UCI indication information is indication information for indicating what uplink control information the UCI information transmitted by the UE is, and after receiving the UCI indication information, the base station may determine the specific information of the uplink control information transmitted by the UE based on the indication information. The specific form of the indication information is not limited in the embodiment of the present disclosure, for example, the indication information may be information carried by bits (e.g., 2 bits) with a specified length, for example, 00, 01, 10, and 11 respectively correspond to four different UCI, and after receiving the indication information, the base station may determine the corresponding UCI based on which of the four received indication information 00, 01, 10, and 11 is.

According to the scheme provided by the embodiment of the application, when UCI needs to be transmitted in the PUSCH, the UE can firstly determine the DMRS for demodulating the UCI and transmit the UCI based on the determined DMRS, wherein the DMRS for demodulating the UCI is a special DMRS or the same DMRS as the DMRS for demodulating the PUSCH.

The UCI may specifically include at least one item of Information in the UCI that needs to be transmitted in the PUSCH, and for example, the UCI may include at least one item of Hybrid Automatic repeat Request Acknowledgement (HARQ-ACK), Scheduling Request (SR), and Channel State Information (CSI).

In an optional embodiment of the present application, determining a DMRS for demodulating UCI transmitted in a PUSCH includes at least one of:

determining a DMRS for demodulating UCI as a dedicated DMRS;

if the position interval between the first resource position occupied by the UCI in the PUSCH and the second resource position occupied by the DMRS for demodulating the PUSCH in the PUSCH is smaller than the set interval, the DMRS for demodulating the UCI and the DMRS for demodulating the PUSCH are the same DMRS, and if the position interval between the first resource position and the second resource position is not smaller than the set interval, the DMRS for demodulating the UCI is the special DMRS.

The position interval between the first resource position and the second resource position is smaller than the set interval, which means that the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols spaced in the time domain by the first resource position and the second resource position is smaller than the set value.

That is, for UCI transmitted in PUSCH, DMRS for demodulating the UCI, one way is to directly employ a dedicated DMRS, that is, a DMRS dedicated for demodulating the UCI. Another way may be to determine whether the DMRS for demodulating the UCI uses a dedicated DMRS based on a position interval between a first resource position occupied by the UCI in the PUSCH and a second resource position occupied by the DMRS for demodulating the PUSCH in the PUSCH, and specifically, when the position interval between the first resource position and the second resource position is small, the DMRS for demodulating the UCI and the DMRS for demodulating the PUSCH may be the same DMRS, that is, the existing DMRS used when transmitting the UCI in the PUSCH may be used, and at this time, since the positions of the UCI and the DMRS are close, the demodulation performance of the UCI may be better ensured. And when the position interval between the first resource position and the second resource position is large, the dedicated DMRS for the UCI may be used to ensure demodulation performance of the UCI.

The relationship between the resource position occupied by the dedicated DMRS in the PUSCH and the resource position occupied by the UCI in the PUSCH may be determined by the base station and the UE in advance, or the UE may determine the relationship according to the indication information acquired from the base station, or the relationship may be determined by the UE according to the determination mode based on the determination mode agreed by the base station and the UE in advance.

In an optional embodiment of the present application, based on the determined DMRS for demodulating UCI, transmitting UCI or indication information of UCI in PUSCH may include at least one of:

when the DMRS used for demodulating the UCI is the special DMRS, the special DMRS and the UCI are transmitted in a PUSCH in a time division multiplexing mode;

when the DMRS for demodulating UCI is the special DMRS, the special DMRS and the UCI are transmitted in a PUSCH in a frequency division multiplexing mode;

and when the DMRS used for demodulating the UCI is the special DMRS, transmitting the indication information of the UCI in the PUSCH.

Specifically, which transmission method is adopted may be a transmission method agreed in advance by the base station and the UE, that is, a transmission method prescribed by a protocol.

In order to better understand the transmission method of UCI provided in the embodiments of the present application, the method is further described below with reference to several examples.

Example 1

In order to improve the performance of UCI, the resource for multiplexing UCI (i.e., the resource in PUSCH used for transmitting UCI in PUSCH, i.e., the resource in PUSCH occupied by UCI) may be far from the DMRS of PUSCH (i.e., the DMRS capable of demodulating data transmitted in PUSCH). That is, when the position interval between the first resource position occupied by the UCI in the PUSCH and the second resource position occupied by the DMRS for demodulating the PUSCH is smaller than the set interval, for example, the resource for multiplexing the UCI and the DMRS of the PUSCH are separated by L OFDM symbols, where L is a positive integer greater than or equal to 1, and L may be configured by a higher layer signaling or preset by a protocol, a special DMRS may be added to demodulate the UCI, where the special DMRS is a DMRS different from the DMRS of the PUSCH, as shown in fig. 8, the DMRS symbol of the PUSCH shown in the figure is the resource position occupied by the PUSCH, the DMRS of the UCI is the special DMRS for demodulating the UCI, and the resource positions corresponding to the UCI and the UCI in the figure, that is, the resource position occupied by the special DMRS and the resource occupied by the UCI, respectively, and the demodulation performance of the UCI may be improved.

Example two

As an alternative, UCI and DMRS for demodulating UCI (i.e., dedicated DMRS) may be time-division multiplexed, that is, UCI and DMRS for demodulating UCI are located in different OFDM symbols, for example, DMRS for demodulating UCI is located in OFDM symbol n (nth OFDM symbol of PUSCH resources), UCI is located in OFDM symbol n + k, k is a positive integer greater than or equal to 1, and UCI and DMRS for demodulating UCI occupy the same frequency domain resource, as shown in fig. 9, DMRS for UCI occupies the nth OFDM symbol, UCI occupies the nth + kth OFDM symbol, and k is 1 in this example of fig. 9.

Example three

As an alternative, the UCI and the DMRS for demodulating the UCI may be frequency division multiplexed, that is, the UCI and the DMRS for demodulating the UCI are located in the same OFDM symbol, and the spaced multiplexed UCI and the DMRS for demodulating the UCI are, for example, one DMRS RE for demodulating the UCI is placed every m UCI Resource Elements (REs), where m is a positive integer greater than or equal to 1 (e.g., m is equal to 3), and m may be configured by higher layer signaling or preset by a protocol, as shown in fig. 10, and on the same OFDM symbol, 3 REs are spaced between two adjacent REs for transmitting the DMRSs for demodulating the UCI.

Example four

As an optional manner, the UCI may be multiplexed in the PUSCH in a sequence manner, that is, a reference signal (indicating information corresponding to the UCI in the foregoing) is multiplexed in the PUSCH, where the sequence of the reference signal includes UCI information, as shown in fig. 11, and the UCI sequence shown in the figure is the indicating information of the UCI.

The UCI transmission method provided by the embodiment of the application has the following beneficial effects:

1. for UCI, the method can ensure accurate channel estimation through the special DMRS, thereby ensuring the demodulation performance of the UCI.

2. By adopting the method, the influence on the PUSCH performance when the UCI is transmitted by adopting the PUSCH due to the fact that the PUSCH is dropped when the demodulation performance of the UCI is not ensured because the distance between the UCI and the DMRS of the PUSCH is long can be reduced.

3. The method can achieve better balance between the effective utilization of resources and the demodulation performance of UCI, namely when the positions of the DRMS and the UCI for demodulating PUSCH are close to each other, the data and the UCI transmitted in the PUSCH can share the same DRMS to reduce the resources occupied by the DRMS, and if the positions of the DRMS and the UCI are far from each other, a special DRSM can be adopted for the UCI to ensure the demodulation performance of the UCI.

Based on the same principle as the UCI transmission method provided in the embodiment of the present application, an embodiment of the present application further provides a UCI transmission apparatus, which may include at least one processor configured to:

determining a DMRS for demodulating UCI transmitted in a PUSCH;

transmitting the UCI in a PUSCH based on the determined DMRS for demodulating the UCI.

Optionally, the at least one processor, when determining the DMRS for demodulating the UCI transmitted in the PUSCH, is configured to perform at least one of:

determining a DMRS for demodulating UCI as a dedicated DMRS;

Optionally, the position interval between the first resource position and the second resource position is smaller than the set interval, which means that the number of orthogonal frequency division multiplexing OFDM symbols spaced in the time domain by the first resource position and the second resource position is smaller than the set value.

Optionally, the at least one processor, when transmitting the UCI in the PUSCH based on the determined DMRS for demodulating the UCI, is configured to perform at least one of:

Based on the same principle as the method provided by the embodiment of the application, the embodiment of the application also provides a terminal device, wherein the terminal device comprises a memory and a processor; wherein the memory has stored therein a computer program; the processor is adapted to perform the method provided in any of the alternative embodiments of the present application when running the computer program.

An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the processor executes the method provided in any optional embodiment of the present application.

As an alternative, fig. 12 shows a schematic structural diagram of an electronic device (specifically, the terminal device or another device that executes the scheme provided by the embodiment of the present application) provided by the embodiment of the present application, and as shown in fig. 12, the electronic device 4000 may include: a processor 4001 and a memory 4003. Processor 4001 is coupled to memory 4003, such as via bus 4002. Optionally, the electronic device 4000 may further comprise a transceiver 4004. In addition, the transceiver 4004 is not limited to one in practical applications, and the structure of the electronic device 4000 is not limited to the embodiment of the present application.

The Processor 4001 may be a CPU (Central Processing Unit), a general-purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 4001 may also be a combination that performs a computational function, including, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, or the like.

Bus 4002 may include a path that carries information between the aforementioned components. The bus 4002 may be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The bus 4002 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.

The Memory 4003 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these.

The memory 4003 is used for storing application codes for executing the scheme of the present application, and the execution is controlled by the processor 4001. Processor 4001 is configured to execute application code stored in memory 4003 to implement what is shown in any of the foregoing method embodiments.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A transmission method of Uplink Control Information (UCI) is characterized by comprising the following steps:

determining a demodulation reference signal (DMRS) for demodulating UCI transmitted in a Physical Uplink Shared Channel (PUSCH);

transmitting the UCI or indication information of the UCI in the PUSCH based on the determined DMRS for demodulating the UCI.

2. The method of claim 1, wherein the determining the DMRS for demodulating the UCI transmitted in the PUSCH comprises at least one of:

determining a DMRS for demodulating the UCI as a dedicated DMRS;

and if the position interval between a first resource position occupied by the UCI in the PUSCH and a second resource position occupied by the DMRS for demodulating the PUSCH in the PUSCH is smaller than a set interval, the DMRS for demodulating the UCI and the DMRS for demodulating the PUSCH are the same DMRS, and if the position interval between the first resource position and the second resource position is not smaller than the set interval, the DMRS for demodulating the UCI is a special DMRS.

3. The method of claim 2, wherein the position interval between the first resource location and the second resource location is smaller than a set interval, which means that the number of OFDM symbols separated in the time domain between the first resource location and the second resource location is smaller than a set value.

4. The method according to any one of claims 1 to 3, wherein the transmitting the UCI or the indication information of the UCI in the PUSCH based on the determined DMRS for demodulating the UCI comprises at least one of:

when the DMRS used for adjusting the UCI is a special DMRS, transmitting the special DMRS and the UCI in a time division multiplexing mode in the PUSCH;

when the DMRS used for adjusting the UCI is a special DMRS, transmitting the special DMRS and the UCI in the PUSCH in a frequency division multiplexing mode;

and when the DMRS used for adjusting the UCI is the special DMRS, transmitting the indication information of the UCI in the PUSCH.

5. An apparatus for transmitting uplink control information, UCI, the apparatus comprising at least one processor configured to:

determining a DMRS for demodulating UCI transmitted in a Physical Uplink Shared Channel (PUSCH);

6. A method for performing Listen Before Talk (LBT), comprising:

acquiring indication information;

determining an uplink LBT sub-band for transmitting a Sounding Reference Signal (SRS) according to the indication information;

and LBT is carried out on the determined uplink LBT sub-band.

7. The method of claim 6, wherein the SRS is an aperiodic SRS triggered by an SRS request field in a Physical Downlink Control Channel (PDCCH);

the indication information includes at least one of:

the downlink LBT sub-band where the PDCCH is located, the indication information carried in the PDCCH, and the idle downlink LBT sub-band in the bandwidth part BWP.

8. The method of claim 7, wherein the PDCCH comprises any one of:

scheduling a PDCCH of a Physical Downlink Shared Channel (PDSCH);

scheduling a PDCCH of a Physical Uplink Shared Channel (PUSCH);

a dedicated PDCCH for triggering an aperiodic SRS;

if the PDCCH is a PDCCH for scheduling a PDSCH or a dedicated PDCCH, the indication information carried in the PDCCH comprises a value of the SRS request field and/or a value of a field for indicating an uplink LBT sub-band for transmitting SRS;

a value of the SRS request field;

information indicating an uplink LBT subband for transmitting a PUSCH;

a value of a field indicating an uplink LBT subband for transmitting the SRS.

9. The method of claim 8, wherein the indication information includes a downlink LBT sub-band where the PDCCH is located and a value of the SRS request field, and wherein the determining, according to the indication information, an uplink LBT sub-band for transmitting the SRS comprises:

determining an uplink LBT sub-band for transmitting the SRS according to the downlink LBT sub-band where the PDCCH is located, the value of the SRS request field and a first mapping relation; wherein, the first mapping relation is the mapping relation among each downlink LBT sub-band, each value and each uplink LBT sub-band;

alternatively, the first and second electrodes may be,

the determining, according to the indication information, an uplink LBT subband to transmit an SRS includes:

determining an uplink LBT sub-band for transmitting the SRS according to the idle downlink LBT sub-band, the value of the SRS request field and a second mapping relation; wherein, the second mapping relation is the mapping relation among each downlink LBT sub-band, each value and each uplink LBT sub-band;

alternatively, the first and second electrodes may be,

the determining, according to the indication information, the uplink LBT subband to transmit the SRS includes:

determining the uplink LBT sub-band for transmitting the SRS according to the value of the field for indicating the uplink LBT sub-band for transmitting the SRS and the third mapping relation; wherein the third mapping relationship is a mapping relationship between each value and each uplink LBT subband.

10. The method of claim 8, wherein the indication information includes a downlink LBT subband idle in BWP, and wherein determining an uplink LBT subband to transmit SRS according to the indication information comprises:

determining an uplink LBT sub-band corresponding to the idle downlink LBT sub-band as an uplink LBT sub-band for transmitting SRS;

alternatively, the first and second electrodes may be,

11. The method of claim 10, wherein the downlink LBT sub-bands satisfying the predetermined condition comprise M sub-bands located at specified frequency domain positions in the free downlink LBT sub-bands, wherein M ≧ 1.

12. The method of claim 8, wherein the indication information includes a downlink LBT sub-band idle in BWP and a downlink LBT sub-band where the PDCCH is located, and wherein determining the uplink LBT sub-band for SRS transmission according to the indication information comprises:

and determining an uplink LBT sub-band corresponding to the downlink LBT sub-band where the PDCCH is located in the idle downlink LBT sub-band and/or an uplink LBT sub-band corresponding to the downlink LBT sub-band where the PDCCH is located in the idle downlink LBT sub-band meets a specific frequency domain position relationship as the uplink LBT sub-band for transmitting the SRS.

13. An apparatus for performing Listen Before Talk (LBT), comprising:

an uplink sub-band determining module, configured to obtain indication information, and determine an uplink LBT sub-band for transmitting an SRS according to the indication information;

14. A terminal device, characterized in that the terminal device comprises a memory and a processor;

the memory has stored therein a computer program;

the processor is configured to perform the method of any one of claims 1 to 4 and 6 to 12 when running the computer program.

15. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, causes the processor to carry out the method of any one of claims 1 to 4 and 6 to 12.