CN113839755B

CN113839755B - Control signaling obtaining method, sending method, device, terminal and network side equipment

Info

Publication number: CN113839755B
Application number: CN202010584052.3A
Authority: CN
Inventors: 李东儒; 潘学明; 李娜; 姜大洁; 吴凯
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2023-04-18
Anticipated expiration: 2040-06-23
Also published as: WO2021259183A1; CN113839755A

Abstract

The application provides a control signaling obtaining method, a control signaling sending device, a terminal and network side equipment, wherein the method comprises the following steps: acquiring a first-stage control signaling, wherein the first-stage control signaling carries basic control information; acquiring a second-level control signaling, wherein control information carried by the second-level control signaling is used for at least one of the following items: updating the basic control information carried by the first-stage control signaling; indicating other control information. The method and the device improve the coverage effect of the control signaling.

Description

Control signaling obtaining method, sending method, device, terminal and network side equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a control signaling obtaining method, a control signaling sending device, a terminal, and a network side device.

Background

As communication technologies develop, more and more terminal types can be supported by some communication systems, for example: the mobile phone, the tablet computer, the robot and the like are supported, and a terminal with limited capability (reduced capability UE, redmap UE) such as wearable equipment, an industrial sensor, video monitoring equipment and the like can also be supported. However, the number of bits included in the control signaling in the current communication system is large, and some terminals, such as the reccap UE, cannot successfully receive the control signaling including the large number of bits due to limited coverage capability. That is, the control signaling may not meet the coverage requirement of some terminals, resulting in poor coverage effect of the control signaling.

Disclosure of Invention

The application provides a control signaling obtaining method, a control signaling sending device, a terminal and network side equipment, and can solve the problem that the coverage effect of control signaling is poor.

In a first aspect, an embodiment of the present application provides a method for acquiring a control signaling, which is applied to a terminal, and includes:

acquiring a first-stage control signaling, wherein the first-stage control signaling carries basic control information;

acquiring a second-level control signaling, wherein control information carried by the second-level control signaling is used for at least one of the following items:

updating the basic control information carried by the first-stage control signaling;

indicating other control information.

In a second aspect, an embodiment of the present application provides a method for acquiring a control signaling, where the method is applied to a terminal, and the method includes:

acquiring third DCI, wherein the third DCI comprises compressed control information or jointly coded control information, and the compressed control information means that configurable bits of the control information are smaller than preset configurable bits;

and according to the third DCI, performing signal receiving and demodulation or scheduling data transmission.

In a third aspect, an embodiment of the present application provides a method for sending a control signaling, where the method is applied to a network side device, and includes:

sending a first-level control signaling, wherein the first-level control signaling carries basic control information;

sending a second-level control signaling, wherein control information carried by the second-level control signaling is used for at least one of the following items:

indicating other control information.

In a fourth aspect, an embodiment of the present application provides a method for sending a control signaling, where the method is applied to a network side device, and includes:

and sending a third DCI, wherein the third DCI comprises compressed control information or jointly coded control information, and the compressed control information means that configurable bits of the control information are smaller than preset configurable bits.

In a fifth aspect, an embodiment of the present application provides a control signaling obtaining apparatus, which is applied to a terminal, and is characterized in that the apparatus includes:

a first obtaining module, configured to obtain a first-level control signaling, where the first-level control signaling carries basic control information;

a second obtaining module, configured to obtain a second-level control signaling, where control information carried in the second-level control signaling is used for at least one of:

indicating other control information.

In a sixth aspect, an embodiment of the present application provides a control signaling obtaining apparatus, which is applied to a terminal, and includes:

an obtaining module, configured to obtain third DCI, where the third DCI includes compressed control information or jointly encoded control information, where the compressed control information refers to that a configurable bit of the control information is smaller than a preset configurable bit;

and the execution module is used for executing signal receiving and demodulation or executing scheduling data transmission according to the third DCI.

In a seventh aspect, an embodiment of the present application provides a control signaling sending apparatus, which is applied to a network side device, and includes:

a first sending module, configured to send a first level control signaling, where the first level control signaling carries basic control information;

a second sending module, configured to send a second-level control signaling, where control information carried in the second-level control signaling is used for at least one of:

indicating other control information.

In an eighth aspect, an embodiment of the present application provides a control signaling sending apparatus, which is applied to a network side device, and includes:

and a sending module, configured to send a third DCI, where the third DCI includes compressed control information or jointly encoded control information, and the compressed control information refers to that a configurable bit of the control information is smaller than a preset configurable bit.

In a ninth aspect, an embodiment of the present application provides a terminal, including: the control signaling acquisition method comprises a memory, a processor and a program or an instruction stored on the memory and capable of running on the processor, wherein the program or the instruction realizes the steps in one control signaling acquisition method provided by the embodiment of the application when being executed by the processor, or realizes the steps in another control signaling acquisition method provided by the embodiment of the application when being executed by the processor.

In a tenth aspect, an embodiment of the present application provides a network side device, including: the control signaling method includes a memory, a processor, and a program or instructions stored in the memory and executable on the processor, where the program or instructions when executed by the processor implement the steps in one control signaling method provided in the embodiments of the present application, or the program or instructions when executed by the processor implement the steps in another control signaling method provided in the embodiments of the present application.

In a tenth aspect, an embodiment of the present application provides a readable storage medium, where the readable storage medium stores a program or an instruction, and the program or the instruction, when executed by a processor, implements a step in a control signaling obtaining method provided in an embodiment of the present application, or the program or the instruction, when executed by the processor, implements a step in another control signaling obtaining method provided in an embodiment of the present application, or the program or the instruction, when executed by the processor, implements a step in a control signaling sending method provided in an embodiment of the present application, or the program or the instruction, when executed by the processor, implements a step in another control signaling sending method provided in an embodiment of the present application.

In the embodiment of the application, a first-level control signaling is obtained, wherein the first-level control signaling carries basic control information; acquiring a second-level control signaling, wherein control information carried by the second-level control signaling is used for at least one of the following items: updating the basic control information carried by the first-stage control signaling; indicating other control information. Therefore, the hierarchical transmission of the control signaling can be realized, and the bit number of the control signaling can be reduced because the first-level control signaling carries the basic control information, thereby improving the coverage effect of the control signaling.

Drawings

FIG. 1 illustrates a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a flowchart of a control signaling obtaining method according to an embodiment of the present application;

fig. 3 is a flowchart of another control signaling obtaining method provided in an embodiment of the present application;

fig. 4 is a flowchart of a method for controlling signaling transmission according to an embodiment of the present application;

fig. 5 is a flowchart of another control signaling sending method according to an embodiment of the present application;

fig. 6 to 12 are schematic diagrams of signaling transmission and signaling structures provided in an embodiment of the present application;

fig. 13 is a structural diagram of a control signaling obtaining apparatus according to an embodiment of the present application;

fig. 14 is a block diagram of another control signaling obtaining apparatus according to an embodiment of the present application;

fig. 15 is a block diagram of another control signaling acquiring apparatus according to an embodiment of the present application;

fig. 16 is a block diagram of another control signaling obtaining apparatus according to an embodiment of the present application;

fig. 17 is a block diagram of another control signaling obtaining apparatus according to an embodiment of the present application;

fig. 18 is a structural diagram of a control signaling transmission apparatus according to an embodiment of the present application;

fig. 19 is a block diagram of another control signaling transmission apparatus according to an embodiment of the present application;

fig. 20 is a block diagram of a terminal according to an embodiment of the present application;

fig. 21 is a block diagram of a network side device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used are interchangeable under appropriate circumstances such that embodiments of the application can be practiced in sequences other than those illustrated or described herein, and the terms "first" and "second" used herein generally do not denote any order, nor do they denote any order, for example, the first object may be one or more. In addition, "and/or" in the specification and claims means at least one of connected objects, and a character "/" generally means that the former and latter related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably in embodiments of the present application, and the described techniques may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications, such as 6th generation,6g communication systems.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be referred to as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, an ultra-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID) or a vehicle mounted Device (VUE), a pedestrian terminal (PUE), a red UE, and other terminal side devices, where the red UE) may include: wearing equipment, industrial sensor, video monitoring equipment etc. wearing equipment includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.

The following describes in detail a method, a device, a terminal, and a network side device for acquiring a control signaling according to the embodiments of the present application through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart of a control signaling obtaining method provided in an embodiment of the present application, where the method is applied to a terminal, and as shown in fig. 2, the method includes the following steps:

step 201, a first level control signaling is obtained, where the first level control signaling carries basic control information.

The obtaining of the first-level control signaling may be receiving the first-level control signaling sent by the network-side device, or may be obtaining the first-level control signaling according to a protocol specification, that is, the first-level control signaling is a protocol convention. The DCI format (format) and/or DCI content (content) of the first level control signaling, as agreed upon by the protocol.

The basic control information may be necessary information for signal reception and demodulation, such as a related indication of data demodulation, or may be one or more of the most basic or important control information in the protocol-agreed control information. For example, the basic control information includes DCI format identifier, frequency domain resource allocation, modulation and coding scheme, and the like. Other control information besides the basic control information, for example, time domain resource allocation, etc., may be configured with a default value or initial value through the network side. This allows the scheduling information to be demodulated by only acquiring the first level control signaling terminal. The first-level control signaling carries basic control information but not other control information, so that the bit number of the first-level control signaling can be reduced to enhance the coverage effect of the first-level control signaling.

Step 202, obtaining a second level control signaling, where control information carried by the second level control signaling is used for at least one of:

indicating other control information.

The obtaining of the second-level control signaling may be receiving the second-level control signaling sent by the network side device, or may be obtaining the second-level control signaling according to a protocol specification, that is, the second-level control signaling is a protocol convention.

For example, the protocol specifies the DCI format and/or DCI content of the second level control signaling; as another example, the MAC CE resource time-frequency location, LCID, and MAC CE content of the second level control signaling.

The above updating of the basic control information carried by the first-level control signaling may be that the control information carried by the second-level control signaling is used to update RRC configuration information of the basic control information carried in the first-level control signaling, and may be that all or part of the basic control information carried by the first-level control signaling is updated.

For example, the second level control information is used to update the RRC configuration table of the modulation and coding scheme.

The above-mentioned indication of other control information may be that, in addition to the basic control information in the first-level signaling, other one or more control information are indicated by the second-level control information.

For example, the other control information carried by the second level control signaling may be time domain allocation, effective delay indication of the second level control signaling, redundancy version, HARQ process number, and the like.

For another example, the control information carried in the second-level control signaling may be other control information except the basic control information carried in the first-level control signaling in DCI format1-1,0-1 or DCI format1-0, 0-0.

It should be noted that, in the embodiment of the present application, the execution order of step 201 and step 202 is not limited, for example: as shown in fig. 2, step 201 is executed first, and then step 202 is executed, or step 201 and step 202 are executed simultaneously, or step 202 is executed first, and then step 201 is executed.

In the embodiment of the present application, through the step of transmitting the control signaling in a hierarchical manner, the bit number of the control signaling can be reduced by using the first-level control signaling to carry the basic control information, so that the coverage effect of the control signaling is improved.

As an optional implementation, the method further comprises:

and executing signal receiving and demodulation according to the first-level control signaling and/or the second-level control signaling.

Wherein, the performing signal receiving and demodulating according to the first level control signaling and/or the second level control signaling may include:

according to the first-stage control signaling and the second-stage control signaling, signal receiving and demodulation are executed; or

According to the first-stage control signaling, signal receiving and demodulation are executed; or

And executing signal receiving and demodulation according to the second-level control signaling.

The above-mentioned performing signal receiving and demodulation according to the first-level control signaling and the second-level control signaling may be to perform signal receiving and demodulation by combining the first-level control signaling and the second-level control signaling.

The above-mentioned performing signal receiving and demodulation according to the first-level control signaling may be to perform signal receiving and demodulation only according to the basic control information. For example: in some scenarios, a reception time-frequency resource of a signal is indicated by the basic control information, so that reception and demodulation are performed on the reception time-frequency resource. It should be noted that, in this embodiment, signal reception and demodulation may be performed according to the first-level control signaling before the second-level control signaling is acquired, but this is not limited to, for example: or after the second-level control signaling is acquired, signal receiving and demodulation can be executed according to the first-level control signaling.

The receiving and demodulating signals according to the second level control signaling may be performed only according to the control information carried by the second level control signaling. For example: in some scenarios, the control information carried by the second-level control signaling indicates the receiving resource of the signal, so that the signal is received and demodulated on the receiving resource.

As an optional implementation, the method further comprises:

and executing signal transmission according to the first-level control signaling and/or the second-level control signaling.

Wherein, the performing the signaling according to the first level control signaling and/or the second level control signaling may include:

executing signal transmission according to the first-level control signaling and the second-level control signaling; or

Executing signal transmission according to the first-stage control signaling; or

And executing signal transmission according to the second-level control signaling.

For the specific process, reference may be made to the above signal receiving and demodulating, which is not described herein again.

It should be noted that, in the embodiment of the present application, the signal may be scheduling data, scheduling signaling, or a scheduling reference signal.

As an optional implementation manner, in a case that the first-level control signaling schedules downlink transmission, the basic control information includes at least one of the following: modulation and coding scheme indication (Modulation and coding scheme), control information DCI format identification (Identifier for DCI formats), frequency domain resource allocation indication (FDRA), and New data indicator (New data indicator).

As an optional implementation manner, in a case that the first level control signaling schedules uplink transmission, the basic control information includes at least one of the following:

modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, new data transmission indication, uplink shared channel (UL-SCH) indication and Open loop indication (Open-loop indicator).

The modulation and coding scheme indication may be less than or equal to 5 bits, but is not limited thereto.

As an optional implementation manner, the step of acquiring the second-level control signaling includes:

and under the condition that the first-level control signaling indicates that second-level control signaling is obtained, obtaining the second-level control signaling.

Optionally, under the condition that the first-level control signaling indicates not to acquire the second-level control signaling, the second-level control signaling is not acquired, and the basic control information includes an indication field for indicating whether to acquire the second-level control signaling.

The indication field indicating whether to acquire the second level control signaling may also be referred to as an indication field indicating whether to detect, receive, apply, or demodulate the second level control signaling.

For example, in the case that the basic control information further includes the above-mentioned indication field for indicating whether to detect the second level control signaling, step 202 may be to acquire the second level control signaling in the case that the indication field indicates to detect the second level control signaling.

For example: a '0' means that no detection is required and a '1' means that detection is required. If the indication field is not configured, whether to detect the default configuration of the second level control signaling, such as default detection or non-detection of the second level control signaling, may be determined by RRC or protocol conventions.

Optionally, the basic control information further includes at least one of the following:

an indication field for indicating feedback information of the second level control signaling;

an indication field for indicating detection and/or demodulation parameters of the second level control signaling.

Wherein, the feedback information of the second-level control signaling may include at least one of the following:

a Physical Uplink Control Channel (PUCCH) resource indication is fed back by a Hybrid Automatic Repeat Request (HARQ) of the second-level Control signaling;

a Transmission Power Control (TPC) command of a PUCCH to which the HARQ feedback of the second level control signaling is placed.

Further, the indication field for indicating the feedback information of the second level control signaling may be configured when the second level control signaling is non-group common (DCI), and of course, the indication field may not be configured or the control information may be configured in the second level control signaling.

In addition, the PUCCH resource indication and the TPC command may be encoded independently or jointly, for example: the RRC configuration uses two bits for joint coding, where a code point fed back by uplink transmission power 0& on PUCCH resource 0 is '00', a code point fed back by uplink transmission power 1& on PUCCH resource 1 is '01', a code point fed back by uplink transmission power 2& on PUCCH resource 2 is '10', and a code point fed back by uplink transmission power 3& on PUCCH resource 3 is '11'.

The indication field for indicating the detection and/or demodulation parameters of the second level control signaling may be that the indication field includes information required for detecting and/or demodulating the second level control signaling. For example: the content indicated by the indication field for indicating the detection and/or demodulation parameters of the second-level control signaling may include at least one of the following:

aggregation Level (AL), control Channel Element (CCE) index, mapping type of CCE to Resource Element Group (REG), precoding granularity, transmission Configuration Indication (TCI) state, time domain Resource allocation, frequency domain Resource allocation, quasi-co-location relationship, demodulation reference signal (DMRS) configuration, PDSCH Resource mapping manner, and data multiplexing manner.

For example: when the second level control signaling is DCI and is transmitted by PDCCH, the field is used to indicate the AL and starting CCE index of the second DCI, and these indications may be jointly coded or independently coded.

Another example is: when the second level control signaling is DCI and is multiplexed with the scheduled PDSCH for transmission, the second level control signaling is used to indicate the time-frequency domain location information of the second DCI relative to or multiplexed on the PDSCH resources, the size of the time-frequency resources, the mapping mode, and the like, and these indications may be jointly coded or independently coded.

Further, when the second level control signaling is a Medium access control-control element (MAC CE), the indication field for detecting and/or demodulating the second level control signaling does not need to be configured in the first DCI, for example: the terminal may determine whether the MAC CE is the second-level control signaling according to a Logical Channel Identity (LCID) of the demodulated MAC CE.

As an optional implementation, the first-level control signaling is first DCI, a format and/or content of the first DCI is determined by a network side configuration or a protocol, and the first DCI is a terminal-specific DCI (UE-specific DCI), or the first DCI is a group common DCI.

The group common DCI includes control information of a plurality of terminals.

In this embodiment, the basic control information may be information of several fields that are the most basic in DCI. For example: there may be several fields that must exist in DCI format 0-2 and DCI format 1-2. Another example is: the fields can be fields with configurable bits not being 0 in DCI format 0-2 and DCI format1-2 agreed by the protocol. Further, the first DCI is more densely or frequently transmitted than the second level control signaling, for example: the PDCCH monitoring period is shorter.

And the first DCI may be an uplink DCI (UL DCI) scheduling uplink data or a downlink (DL DCI) scheduling downlink data.

Certainly, in the embodiment of the present application, the first-stage control signaling is not limited to DCI, for example: other signaling is also possible, such as MAC CE or RRC signaling.

As an optional implementation manner, the transmission resource of the second level control signaling is dynamically allocated, semi-statically allocated, or statically allocated.

The dynamic allocation may refer to that the network dynamically indicates the resource of the second level control signaling, so that the resource of the second level control signaling can be flexibly indicated, and therefore, the second level control signaling can also be flexibly transmitted, such as on-demand transmission of the second level control signaling.

For example: the resources of the second level control signaling may be dynamically allocated by an indication field in the first level control signaling for demodulating the second level control signaling.

The semi-static allocation may refer to that a network configures fixed resources of the second-level control signaling and dynamically activates the fixed resources through DCI, so that on-demand transmission of the second-level control signaling through DCI may be implemented.

The static allocation may refer to a network configuring a fixed resource of the second level control signaling, for example: and the second-level control signaling can be transmitted periodically, and the transmission period of the second-level control signaling can be longer than that of the first DCI. In addition, the fixed resource may be a fixed time frequency domain resource configured by RRC.

As an optional implementation manner, the second-level control signaling is terminal-specific second-level control signaling, or the second-level control signaling is group-common second-level control signaling.

The terminal-specific second-level control signaling may be second-level control signaling configured specifically for the terminal, and the group common second-level control signaling may be second-level control signaling configured for multiple terminals, that is, second-level control signaling including multiple terminals.

As an optional implementation manner, the second-level control signaling is a second DCI or a MAC CE, where the second DCI is carried on a Physical Downlink Control Channel (PDCCH), or the second DCI is multiplexed on a Physical Downlink Shared Channel (PDSCH).

In this embodiment, it may be implemented that the second level control signaling is carried on the PDCCH or PDSCH.

Wherein the second DCI may be multiplexed on the PDSCH in a rate matching (rate matching) or puncturing (puncturing) manner.

For example: and under the condition that the bits of the second-level control signaling are smaller than a preset threshold, multiplexing the second DCI on the PDSCH in a puncturing mode, and under the condition that the bits are larger than or equal to the preset threshold, multiplexing the second DCI on the PDSCH in a rate matching mode. The Rate matching scheme may map the second DCI on a symbol adjacent to the PDSCH DMRS (OFDM symbol).

The second-level control signaling is a MAC CE, which may be a new MAC CE defined in the embodiment of the present application, including defining a new LCID and format (format). The MAC CE may carry the second-level control signaling in one of the following manners:

each control information domain of the second-level control signaling defines a new MAC CE respectively;

mapping and defining all control information domains of the second-level control signaling in one MAC CE;

part of the control information field is mapped to one MAC CE, and the remaining part of the control information field individually defines a plurality of MAC CEs.

As an optional implementation manner, the network side configures or agrees to agree on the effective time delay of the second level control signaling, and the terminal applies the indication of the second level control signaling in the first time slot after the effective time delay of the second level control signaling, where the effective time delay is greater than or equal to 0 time slots.

The effective time delay may be a time interval between an end time of a time slot in which the second level control signaling is located and a start time of a first time slot in which the second level control signaling is applied, or the effective time delay may be a time interval between a start time of a time slot in which the second level control signaling is located and a start time of a first time slot in which the second level control signaling is applied. Or, the effective time delay may refer to a time interval between a time slot in which a PUCCH for transmitting HARQ-ACK information of the second level control signaling by the terminal is located and a starting time of a first time slot to which the second level control signaling is applied.

The time slot in which the second level control signaling is located may be a time slot in which the second level control signaling is acquired.

The first time slot to which the second level control signaling is applied may be the first time slot in which the second level control signaling is effective.

It should be noted that, since the effective time delay is greater than or equal to 0 time slot, there is a certain effective time delay in the second-level control signaling, so that the control signaling may not act on the current scheduling data demodulation.

Further, the effective time delay may be calculated by the following formula:

wherein t represents a first slot to which the second level control signaling is applied, k represents a slot in which a terminal transmits a PUCCH for HARQ-ACK information of the second level control signaling,

the number of slots contained in one subframe is represented, and μ represents the subcarrier spacing SCS of the PUCCH.

Of course, this is not limited, for example: the network side directly configures or the protocol directly appoints the effective time delay to be several time slots or several milliseconds.

As an optional implementation manner, the performing signal reception and demodulation according to the first-level control signaling and/or the second-level control signaling includes:

after the second-level control signaling takes effect, signal receiving and demodulation are executed according to the first-level control signaling and/or the second-level control signaling; or

According to the first-level control signaling and/or the second-level control signaling, signal transmission is executed, and the method comprises the following steps:

and after the second-level control signaling takes effect, executing modulation signal transmission according to the first-level control signaling and/or the second-level control signaling.

The validation may be a validation determined according to the validation delay.

The method is used after the operation is effective, so that the terminal and the network side equipment can be ensured to understand the second-level control signaling consistently, and data transmission or demodulation errors can be avoided.

Further, before the second level control signaling is validated, signal reception and demodulation or data transmission scheduling may be performed according to the first level control signaling and another second level control signaling, where the another second level control signaling is another second level control signaling that has been validated before the second level control signaling is validated.

As an optional implementation manner, in a case that the first-level control signaling schedules downlink transmission, the control information carried by the second-level control signaling includes at least one of the following items:

a second level control signaling validation delay indication, a Carrier indication (Carrier indicator), a Time domain resource allocation indication (Time domain resource allocation), a Virtual Resource Block (VRB) -to-Physical Resource Block (PRB) mapping relationship, a Redundancy version (Redundancy version), a HARQ process number (HARQ process number), a Downlink allocation index (Downlink allocation index), a TPC command of a scheduled PUCCH, a PUCCH resource indication, a PDSCH-to-HARQ feedback timing indication (PDSCH-to-HARQ feedback timing indicator), a Physical Resource Block (PRB) bundling size indication (PRB bundling size indicator), a Rate matching indication (Rate matching indicator), a zero power ZP channel state indication reference signal (ZP CSI-RS trigger), antenna port (s)), transmission Configuration Indication (TCI), sounding reference signal SRS request (SRS request), DMRS sequence initialization (DMRS sequence initialization), bandwidth part BWP indication (BWP indicator), secondary cell dormant indication (SCell notification), modulation and coding scheme (Modulation and coding scheme for TB 2) of transport block 2, new data Transmission data indication (New indicator for TB 2) of transport block 2, redundancy version (Redundancy version for TB 2) of transport block 2, code block group CBG Transmission indication (CBG Transmission indication), CBG refresh indication (CBG flashing indication), physical layer PHY priority identification (PHY) of the priority;

or,

in a case where the first level control signaling schedules uplink transmission, the second level control signaling includes at least one of:

an effective delay indication, a carrier indication, a time domain resource allocation indication, a redundancy version, a HARQ process number, a downlink allocation index, a TPC command (TPC command for scheduled PUSCH) of a scheduled physical uplink shared channel PUSCH, an antenna port, an SRS request, a DMRS sequence initialization, a bandwidth part BWP indication, a secondary cell sleep indication, a code block group CBG transmission indication, a physical layer PHY priority identification, an uplink or supplemental uplink indication (UL/SUL indicator), an SRS resource indication (SRS resource indicator), precoding information and number of layers (Precoding and number of layers), a beta offset indication (beta offset indicator), a DMRS and phase tracking reference signal PTRS association indication (DMRS-PTRS association), and an Invalid symbol pattern indication (Invalid symbol pattern indicator) of a second level control signaling.

The TPC command of the scheduled PUCCH may be a TPC command of a PUCCH where HARQ of scheduling data is located, or may be a TPC command of a PUCCH where HARQ feedback of the second-level control signaling is located.

The PUCCH resource indication may be a PUCCH resource indication where HARQ of scheduling data is located, or may be a PUCCH resource indication where HARQ feedback of the second-level control signaling is located.

The above-mentioned upstream or supplemental upstream indication may be 0 or 1 bit depending on whether padding bits are available.

As an optional implementation, the method further comprises:

if the second-level control signaling is second DCI and the terminal detects the second DCI, generating 1-bit HARQ-ACK feedback information, wherein the value of the HARQ-ACK feedback information is acknowledgement ACK, or

And if the second-level control signaling is the MAC CE and the terminal successfully demodulates the MAC CE, generating ACK, and if the second-level control signaling is the MAC CE and the terminal does not successfully demodulate the MAC CE, generating negative acknowledgement NACK.

In this embodiment, when the second-level control signaling is the second DCI, the terminal may feed back only ACK, but not NACK.

Further, the ACK feedback of the second DCI may support a dynamic codebook feedback type, and may be fed back in the first sub-codebook.

Further, the second DCI is a terminal-specific DCI (UE-specific DCI).

And when the second-level control signaling is the MAC CE, the terminal feeds back ACK or NACK according to whether the MAC CE is correctly demodulated.

In addition, the HARQ feedback resource of the second-level control signaling may be configured by a higher layer, or may be indicated by a relevant field of the first-level control signaling.

Further, under the condition that the second level control signaling is the group common control signaling, the HARQ feedback of the second level control signaling may not be supported.

As an optional implementation, the method further comprises:

and if the signal is unsuccessfully demodulated for M times, switching to a default search space group to monitor the PDCCH, or stopping acquiring the first-stage control signaling and/or the second-stage control signaling.

The value of M may be a configuration or protocol agreement on the network side, or a value reported by the UE to the base station through the capability, such as an integer greater than or equal to 1.

The default search space group may be configured or agreed upon by the network side.

For example: and the data scheduled by the terminal demodulating or feeding back the first-level control signaling and/or the second-level control signaling for 4 times are NACK, and the terminal switches to or backs to a default search space group or a default search space set to monitor the PDCCH.

In addition, the PDCCH may be a downlink scheduling DCI or an uplink scheduling DCI, such as a fallback DCI (fallback DCI), and specifically, may be DCI format 0_0, 1_0.

In this embodiment, the PDCCH may be monitored on the default search space group in time, so that the terminal monitors other control signaling in time to implement data demodulation under the condition that the terminal does not successfully demodulate the scheduling data.

As an optional implementation manner, the first-level control signaling includes at least one of the following:

the method comprises the steps of carrier indication, time domain resource allocation indication, mapping relation between virtual resource blocks VRB and physical resource blocks PRB, redundancy version, HARQ process number, downlink allocation indication, PUCCH resource indication fed back by PDSCH, PDSCH-HARQ feedback timing indication, physical resource block PRB binding size indication, rate matching indication and DMRS initialization sequence.

In this embodiment, the first-level control signaling may be extended, and specifically, the first-level control signaling may be configured by a network side or agreed by a protocol.

As an optional implementation manner, in a case that the first-level control signaling schedules downlink transmission, the control information carried by the second-level control signaling includes at least one of the following: modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication and new transmission data indication;

or, in a case that the first-level control signaling schedules uplink transmission, the control information in the second-level control signaling includes at least one of: the method comprises the following steps of modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, new data transmission indication, uplink shared channel UL-SCH indication and open loop indication.

In this embodiment, the extension of the second level control signaling may be implemented. And if the second level control signaling carries the same control information as the first level control signaling, the control information carried in the second level control signaling may be used for updating the control information carried in the first level control signaling. Or the second-level control signaling and the first-level control signaling carry different control information. For example: the basic control information carried in the first-level control signaling includes a modulation and coding mode indication, and the control information carried in the second-level control signaling does not include the modulation and coding mode indication.

As an optional implementation manner, the configurable bits indicated by the modulation and coding scheme in the basic control information in the embodiment of the present application are lower than the first configuration bits.

The first configuration bit may be a configuration bit indicated by a modulation and coding scheme specified by a protocol, and if the configuration bit indicated by the modulation and coding scheme specified by the protocol is 5 bits, the configurable bit indicated by the modulation and coding scheme in the basic control information in the embodiment of the present application is lower than 5 bits. For example: for some terminals only the lowest 8 MCSs need to be supported, so the MCS in the control signaling only needs a 3-bit indication.

In addition, it can be understood that the configurable bit indicated by the modulation and coding scheme in the basic control information is lower than the first configurable bit, and the modulation and coding scheme indication in the basic control information is compressed indication information.

As an optional implementation manner, the maximum configurable bit of the frequency domain resource allocation indication in the basic control information in this embodiment is lower than the second maximum configurable bit.

The second maximum configurable bit may be a maximum configurable bit of a frequency domain resource allocation indication specified by a protocol, so that the maximum configurable bit of the frequency domain resource allocation indication is lower than the second maximum configurable bit, thereby implementing compression of the frequency domain resource allocation indication, that is, reducing the number of bits of the frequency domain resource allocation indication.

The bit number of the first-level control signaling can be further reduced through the modulation and coding mode indication and the frequency domain resource allocation indication.

As an optional implementation manner, all or part of the basic control information in the first-level control signaling is jointly encoded.

For example: FDRA, MCS and the like in the first-level control signaling can be jointly coded; for example, for the FDRA and MCS joint coding of the edge terminals, a common 4 bits represents 16 predefined combinations of FDRA and MCS, etc., and of course, it can also be extended to more combinations of more domains, which is only exemplified here.

The number of bits of the first level control signaling can be further reduced by joint coding.

Further, the basic control information may further include a handover indication, where the handover indication is used for a terminal to receive a target control signaling and stop receiving the first-level control signaling and the second-level control signaling, where the target control signaling is an unclassified control signaling or may be referred to as a normal control signaling.

For example: the first DCI may further have a bit indicating DCI format switching, for example, when a cell edge terminal moves to a cell center, the bit indicates the terminal to start receiving a normal DCI format (e.g., DCI format 1-0-1-0-1), and the first DCI and the second DCI are not acquired.

In addition, in the embodiment of the present application, the search spaces of the first DCI and the second DCI and the search spaces of the other control signaling may be separated into different search spaces, and therefore, the handover instruction may also instruct to switch the search spaces.

In the embodiment of the application, a first-level control signaling is obtained, wherein the first-level control signaling carries basic control information; acquiring a second-level control signaling, wherein control information carried by the second-level control signaling is used for at least one of the following items: updating the basic control information carried by the first-stage control signaling; indicating other control information. Therefore, as the first-stage control signaling carries the basic control information, the bit number of the control signaling can be reduced, and the coverage effect of the control signaling is improved.

Referring to fig. 3, fig. 3 is a flowchart of another control signaling obtaining method provided in an embodiment of the present application, where the method is applied to a terminal, and as shown in fig. 3, the method includes the following steps:

step 301, obtaining a third DCI, where the third DCI includes compressed control information or jointly encoded control information, where the compressed control information refers to that a configurable bit of the control information is smaller than a preset configurable bit.

The preset configurable bits may be agreed in a protocol, and the configurable bits of each control message may be agreed in the protocol.

The obtaining of the third DCI may be sent by a receiving network side or configured according to a protocol convention. Specifically, reference may be made to the first-stage control signaling in the embodiment shown in fig. 2, and further, the control information included in the third DCI may be control information carried by the first-stage control signaling in the embodiment shown in fig. 2, which is not described herein again.

Step 302, according to the third DCI, performing signal reception and demodulation, or performing scheduling data transmission.

The performing of signal reception and demodulation or signal transmission according to the third DCI may include:

performing signal reception and demodulation according to the third DCI; or alternatively

And executing signal transmission according to the third DCI.

In the embodiment of the present application, since the third DCI includes compressed control information or jointly coded control information, the bit number of the DCI may be reduced, so as to improve the DCI coverage effect.

Optionally, the compressed control information includes at least one of:

indication of a modulation and coding scheme of compression and indication of allocation of frequency domain resources of compression.

The compressed modulation and coding scheme indication may be used to indicate only a part of all modulation and coding schemes agreed by the protocol, so that the number of bits indicated by the modulation and coding scheme may be reduced to implement compression.

The compressed frequency domain resource allocation indication may be that the compressed frequency domain resource allocation indication is only used to indicate a part of frequency domain resources in all frequency domain resources agreed by the protocol, so that the bit number of the frequency domain resource allocation indication may be reduced to implement compression.

Optionally, the compressed modulation and coding scheme indication means that configurable bits of the modulation and coding scheme indication are lower than first configuration bits; and/or

The compressed frequency domain resource allocation indication means that the maximum configurable bits of the frequency domain resource allocation indication are lower than the second maximum configurable bits.

The first configuration bit and the second maximum configurable bit may refer to corresponding descriptions of the embodiment shown in fig. 2, and are not described herein again.

Optionally, all or part of the control information in the third DCI employs joint coding.

The partial joint coding may be joint coding of a modulation and coding scheme indication and a frequency domain resource allocation indication.

The joint coding may refer to corresponding descriptions of the first-level control signaling in the embodiment shown in fig. 2, and is not described herein again.

Optionally, the third DCI includes a handover indication, where the handover indication is used to indicate the terminal to receive a target control signaling and stop receiving the third DCI, where the target control signaling includes uncompressed control information and control information that is not jointly coded.

For the up-switch indication, refer to the corresponding description of the switch indicator of the first-level control signaling in the embodiment shown in fig. 2, which is not described herein again.

In the embodiment of the present application, a third DCI is obtained, where the third DCI includes compressed control information or jointly encoded control information; and according to the third DCI, performing signal receiving and demodulation or scheduling data transmission. In this way, since the third DCI includes compressed control information or jointly coded control information, the bit number of the DCI may be reduced to improve the DCI coverage effect.

Referring to fig. 4, fig. 4 is a flowchart of a control signaling sending method according to an embodiment of the present application, where the method is applied to a network side device, as shown in fig. 4, and includes the following steps:

step 401, sending a first level control signaling, where the first level control signaling carries basic control information;

step 402, sending a second level control signaling, wherein control information carried by the second level control signaling is used for at least one of the following items:

indicating other control information.

Optionally, in a case that the first-level control signaling schedules downlink transmission, the basic control information includes at least one of the following: modulation and coding mode indication, control information DCI format identification, frequency domain resource allocation indication and new transmission data indication;

or, in a case that the first-level control signaling schedules uplink transmission, the basic control information includes at least one of:

the method comprises the following steps of modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, new data transmission indication, uplink shared channel (UL-SCH) indication and open loop indication.

Optionally, the step of sending the second level control signaling includes:

and sending the second-level control signaling under the condition that the first-level control signaling indicates that the second-level control signaling is acquired.

Optionally, under the condition that the first-level control signaling indicates not to acquire the second-level control signaling, the second-level control signaling is not sent, and the basic control information includes an indication field for indicating whether to acquire the second-level control signaling.

Optionally, the feedback information includes at least one of:

the resource indication of a Physical Uplink Control Channel (PUCCH) where the automatic hybrid repeat request (HARQ) feedback of the second-level control signaling is located;

and the transmission power control TPC command of the PUCCH where the HARQ feedback of the second-stage control signaling is positioned.

Optionally, the detection and/or demodulation parameter of the second-level control signaling includes at least one of:

aggregation level, CCE (control channel element) index, mapping type from CCE to resource element group REG, precoding granularity, transmission Configuration Indication (TCI) state, time domain resource allocation, frequency domain resource allocation, quasi-co-location relation, demodulation reference signal (DMRS) configuration, PDSCH (physical downlink shared channel) resource mapping mode and data multiplexing mode.

Optionally, the first-stage control signaling is first DCI, a format and/or content of the first DCI is configured by a network side or agreed by a protocol, and the first DCI is a terminal-specific DCI, or the first DCI is a group common DCI.

Optionally, the resource allocation manner of the second level control signaling is one of the following: dynamic allocation, semi-static allocation, or static allocation;

wherein the dynamic allocation refers to dynamically indicating, by a network, a resource of the second level control signaling; the semi-static allocation refers to the fixed resources of the second-level control signaling configured by the network and dynamically activated through DCI; the static allocation refers to the network configuring the fixed resources of the second level control signaling.

Optionally, the second-level control signaling is the terminal-specific second-level control signaling, or the second-level control signaling is a group common second-level control signaling.

Optionally, the second level control signaling is a second DCI or a media access control element MAC CE, where the second DCI is carried on a physical downlink control channel PDCCH, or the second DCI is multiplexed on a physical downlink data channel PDSCH.

Optionally, the second DCI is multiplexed on the PDSCH through a rate matching or puncturing manner.

Optionally, the network side configures or agrees to agree on an effective time delay of the second level control signaling, and the terminal applies the indication of the second level control signaling in a first time slot after the effective time delay of the second level control signaling, where the effective time delay is greater than or equal to 0 time slot.

Optionally, the effective time delay refers to a time interval between an end time of a time slot in which the second level control signaling is located and a start time of a first time slot in which the second level control signaling is applied, or the effective time delay refers to a time interval between a start time of a time slot in which the second level control signaling is located and a start time of a first time slot in which the second level control signaling is applied.

Optionally, in the case that the first-level control signaling schedules downlink transmission, the control information carried by the second-level control signaling includes at least one of the following items:

the effective time delay indication of the second-level control signaling, carrier indication, time domain resource allocation indication, mapping relation from virtual resource block VRB to physical resource block PRB, redundancy version, HARQ process number, downlink allocation index, transmission power control TPC command of scheduled physical uplink control channel PUCCH, PUCCH resource indication, PDSCH to HARQ feedback timing indication, physical resource block PRB binding size indication, rate matching indication, zero-power ZP channel state indication reference signal CSI-RS trigger, antenna port, transmission configuration indication TCI, sounding reference signal SRS request, DMRS sequence initialization, bandwidth part BWP indication, auxiliary cell dormant indication, modulation and coding mode of transmission block 2, new transmission data indication of transmission block 2, redundancy version of transmission block 2, code block group CBG transmission indication, CBG refreshing indication and physical layer PHY priority identification;

or,

the method comprises the following steps of effective delay indication of second-level control signaling, carrier indication, time domain resource allocation indication, redundancy version, HARQ process number, downlink allocation index, TPC command of scheduled Physical Uplink Shared Channel (PUSCH), antenna port, SRS request, DMRS sequence initialization, bandwidth part BWP indication, auxiliary cell dormancy indication, code block group CBG transmission indication, physical layer (PHY) priority identification, uplink or supplementary uplink indication, SRS resource indication, precoding information and layer number, beta offset indication, DMRS and phase tracking reference signal PTRS association indication and invalid symbol pattern indication.

Optionally, the first-level control signaling further includes at least one of the following:

Optionally, in a case that the first level control signaling schedules downlink transmission, the control information carried by the second level control signaling further includes at least one of the following: modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication and new transmission data indication;

or, in a case that the first-level control signaling schedules uplink transmission, the control information in the second-level control signaling includes at least one of: modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, newly transmitted data indication, uplink shared channel (UL-SCH) indication and open loop indication;

optionally, configurable bits indicated by a modulation and coding scheme in the basic control information are lower than first configuration bits; and/or

The maximum configurable bit of the frequency domain resource allocation indication in the basic control information is lower than the second maximum configurable bit.

Optionally, all or part of the basic control information in the first-level control signaling is jointly encoded.

It should be noted that, this embodiment is used as an implementation of the network side corresponding to the embodiment shown in fig. 2, and for a specific implementation of this embodiment, reference may be made to the relevant description of the embodiment shown in fig. 2, so as to avoid repeated description, and this embodiment is not described again. In this embodiment, the coverage effect of the control signaling can be improved as well.

Referring to fig. 5, fig. 5 is a flowchart of another control signaling sending method provided in an embodiment of the present application, where the method is applied to a network side device, as shown in fig. 4, and includes the following steps:

step 501, sending a third DCI, where the third DCI includes compressed control information or jointly encoded control information, where the compressed control information refers to that a configurable bit of the control information is smaller than a preset configurable bit.

Optionally, the compressed control information includes at least one of:

indication of a modulation and coding mode of compression and indication of allocation of frequency domain resources of compression.

It should be noted that, this embodiment is used as an implementation manner of a network side corresponding to the embodiment shown in fig. 3, and for a specific implementation manner of this embodiment, reference may be made to the relevant description of the embodiment shown in fig. 3, so as to avoid repeated description, and this embodiment is not repeated again. In this embodiment, the coverage effect of the control signaling can be improved as well.

The following illustrates a method provided in the embodiments of the present application by using a plurality of embodiments, which may include the following:

the first embodiment is as follows:

in this embodiment, a first-level control signaling and a second-level control signaling are two-level DCI, and an HARQ feedback mechanism configured with the second-level control signaling is illustrated as follows:

the network side configures two levels of DCIs for downlink of the RedCap UE, and the domains of each level of DCI are as follows. And the two-stage DCIs are respectively carried in Search Spaces (SSs) configured by the network, as shown in fig. 6, the terminal is configured to detect the first DCI in SS1 and detect the second DCI in SS 2. The terminal determines whether to detect the second DCI from the indication in the first DCI.

Wherein, the first DCI may be UE specific DCI, including at least one of:

a modulation and coding scheme indication;

a DCI format identifier;

a frequency domain resource allocation indication;

a new data transmission indication;

an indication field for indicating whether to detect the second level control signaling;

an indication field for detecting and/or demodulating the second level control signaling.

Wherein, the indication field for detecting the second level control signaling may indicate whether to detect the indication field of the second level control signaling through 1 bit, if '0' indicates that detection is not needed, and '1' indicates that detection is needed.

The indication field for detecting and/or demodulating the second level control signaling may include an indication field, such as 2 bits, of information required for demodulating the second level control information, the indication field contains parameters: AL and CCE start index (joint coding). The RRC configuration combinations are as follows: '00' means: AL start index of 4,cce start index of 2 (AL, CCE start index =4,2); '01' represents: AL, CCE start index =4,6; '10' means: AL, CCE start index =8,24; '11' means: AL, CCE start index =8,32.

The second DCI may be UE specific DCI transmitted by the PDCCH, and may include at least one of:

the method comprises the steps of effective time delay indication of second-level control signaling, carrier indication, time domain resource allocation indication, mapping relation from virtual resource blocks VRB to physical resource blocks PRB, redundancy version, HARQ process number, downlink allocation index, transmission power control TPC command of a scheduled physical uplink control channel PUCCH, PUCCH resource indication, PDSCH-to-HARQ feedback timing indication, physical resource block PRB binding size indication, rate matching indication, zero-power ZP channel state indication reference signal CSI-RS trigger, antenna port, transmission configuration indication TCI, sounding reference signal SRS request, DMRS sequence initialization, bandwidth part BWP indication, auxiliary cell dormancy indication, modulation and coding mode of a transmission block 2, new transmission data indication of the transmission block 2, redundancy version of the transmission block 2, code block group CBG transmission indication, CBG refreshing indication and physical layer PHY priority identification.

The terminal can measure the two levels of DCI in the following two modes:

1. according to the indication of the first DCI, the terminal does not need to detect the second-level control signaling. As shown in fig. 6, the first DCI indicates that the second DCI does not need to be detected, and the terminal demodulates the data according to the indication of the first DCI and the indication of the currently valid second DCI (the last detected second DCI).

2. According to the indication of the first DCI, the indication of the last two fields is that the terminal '1' needs to detect the second DCI, and '01' indicates that AL and CCE start index of the second DCI are 4,6. As shown in fig. 6, the terminal detects the second first DCI by blind detection and detects the second DCI according to the indication of the first DCI. But the second DCI takes effect in the next time slot after the second DCI sends the ACK. Therefore, this PDSCH (i.e., the second PDSCH) is still demodulated according to the second first DCI and the previous second DCI. And the second DCI takes effect until the HARQ feedback of the second DCI is completed. As shown in fig. 6, the third and fourth PDSCHs are demodulated according to the first DCI followed by the second DCI in effect.

Further, the second DCI may support only feedback ACK and be fed back in the second sub-codebook.

And if the data of the two-stage DCI scheduling demodulated by the terminal for N times are NACK, switching to/returning to the search space group 1 to monitor the downlink scheduling DCI format1-0/0-0.

Example 2:

in this embodiment, the second-level control signaling is used as a MAC CE, and the effective time of the MAC CE =3slots. HARQ feedback alone for the second level control signaling is not supported, and the MAC CE exemplifies UE specific configuration:

the network configures two downlink DCIs for the RedCap UE, and the fields of each downlink DCI are as follows.

The first DCI includes at least one of:

modulation and coding mode indication, control information DCI format identification, frequency domain resource allocation indication and new transmission data indication.

The second-level control signaling is an MAC CE, and the MAC CE carries a plurality of sub-MAC CEs, and carries an indication for activating related control information, which specifically includes at least one of the following:

the method comprises the following steps of effective time delay indication of second-level control signaling, carrier indication, time domain resource allocation indication, mapping relation from virtual resource blocks VRB to physical resource blocks PRB, redundancy version, HARQ process number, downlink allocation index, transmission power control TPC command of scheduled physical uplink control channel PUCCH, PUCCH resource indication, PDSCH-to-HARQ feedback timing indication, physical resource block PRB binding size indication, rate matching indication, zero-power ZP channel state indication reference signal CSI-RS trigger, antenna port, transmission configuration indication TCI, sounding reference signal SRS request, DMRS sequence initialization, bandwidth part BWP indication, auxiliary cell dormant indication, modulation and coding mode of a transmission block 2, new transmission data indication of the transmission block 2, redundancy version of the transmission block 2, code block group CBG transmission indication, CBG refreshing indication and physical layer PHY priority identification.

Wherein, the multiple sub-MAC CEs Take (TDRA) MAC CE as an example:

the RRC configures 16 TDRA lists, dynamically indicates one of the TDRA MAC CEs (or activates multiple TDRA MAC CEs), and defines the TDRA MAC CE and its corresponding LCID and MAC CE format. The method comprises the following specific steps:

the time domain resource allocation of a PDCCH MAC CE for a specific terminal is identified by a MAC subheader with LCID, which is fixed to 8 bits, and the fields are shown in fig. 7.

As shown in FIG. 8, TDRA row ID (TDRA row ID), this field indicates the TDRA row ID identified by the TDRA row ID, and the field is 4 bits in length.

Where R represents a reserved bit, which may be 0 bits.

In addition, the LCID value of the TDRA MAC CE is shown in the following table:

code point or Index (Codepoint/Index)	LCID value
		64	TDRA MAC CE

Further, the TDRA MAC CE may be a fixed size or a variable size.

The remaining MAC CEs in the second control signaling may be designed and defined similarly as the above TDRA MAC CE.

In addition, the first DCI may be carried in a search space configured by the network, and as shown in fig. 9, the first DCI may be detected in SS 1. The second level control signaling is dynamically scheduled (specific time domain location) by the first DCI, and is carried in the PDSCH channel for transmission as shown in fig. 9. And the terminal judges whether a second-level control signaling exists or not by decoding the PDSCH and according to the LCID in the MAC subheader. The effective time delay of the second level control signaling is 3slots. Before validation, the terminal demodulates the data according to the first DCI and the indication of the previous second level control signaling.

The terminal detecting the two-stage control signaling may include the following two ways:

1. the terminal demodulates the data according to the indication of the first DCI and the indication of the currently active second level control signaling (last detected level control signaling).

2. And the terminal detects the second first DCI to acquire the PDSCH and acquires the control information related to the level control signaling through demodulation. After the stage control signaling is enabled, the UE may demodulate data, such as the last two PDSCHs, according to the detected first DCI and the stage control signaling.

It should be noted that, in the embodiment of the present application, when the second-level control signaling is a MAC CE, the MAC CE may be designed as follows:

1. the MAC CE is UE specific. One MAC CE includes multiple pieces of control information, which can be shown in fig. 10:

2. the MAC CE is a group common, and one MAC CE includes control information related to a plurality of terminals, as shown in fig. 11.

It should be noted that, in this embodiment of the present application, when the second-level control signaling is a MAC CE, a format of the MAC CE is not limited in this embodiment, for example: it can also be designed as a serial MAC PDU associated with a Random Access Response (RAR), such as: as shown in fig. 12.

In the embodiment of the application, a scheme of two-stage DCI is introduced, a first-stage control signaling transmits necessary basic control information (the number of bits is very small), and a second-stage control signaling transmits finer control information. In most cases, the terminal can demodulate data or send data only by receiving the first-level control signaling, so that the defects of insufficient coverage of the downlink PDCCH and the like caused by the capability limitation of the RedCap UE can be overcome. Meanwhile, the design of the second-level control signaling also solves the problems of limited network scheduling and the like.

Referring to fig. 13, fig. 13 is a structural diagram of a control signaling obtaining apparatus according to an embodiment of the present application, and as shown in fig. 13, a control signaling obtaining apparatus 1300 includes:

a first obtaining module 1301, configured to obtain a first level control signaling, where the first level control signaling carries basic control information;

a second obtaining module 1302, configured to obtain a second level control signaling, where control information carried in the second level control signaling is used for at least one of:

indicating other control information.

Optionally, as shown in fig. 14, the control signaling obtaining further includes an executing module 1303, where:

an executing module 1303, configured to execute signal receiving and demodulation according to the first-level control signaling and/or the second-level control signaling; or alternatively

And an executing module 1303, configured to execute signal sending according to the first-level control signaling and/or the second-level control signaling.

or, in a case that the first level control signaling schedules uplink transmission, the basic control information includes at least one of: the method comprises the following steps of modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, new data transmission indication, uplink shared channel (UL-SCH) indication and open loop indication.

Optionally, the second obtaining module 1302 is configured to obtain the second-level control signaling when the first-level control signaling indicates that the second-level control signaling is obtained.

Optionally, under the condition that the first level control signaling indicates not to acquire the second level control signaling, the second level control signaling is not acquired, and the basic control information includes an indication field used for indicating whether to acquire the second level control signaling.

Optionally, the basic control information includes at least one of:

Optionally, the feedback information includes at least one of:

and the HARQ feedback of the second-level control signaling controls the TPC command of the transmission power of the PUCCH.

Optionally, the detection and/or demodulation parameters of the second-level control signaling include at least one of the following:

Optionally, the transmission resource of the second level control signaling is dynamically allocated, semi-statically allocated, or statically allocated.

Optionally, the second-level control signaling is terminal-specific second-level control signaling, or the second-level control signaling is group-common second-level control signaling.

Optionally, the executing step 1303 is configured to execute signal receiving and demodulating according to the first level control signaling and/or the second level control signaling after the second level control signaling takes effect; or alternatively

And an executing step 1303, configured to execute signal sending according to the first level control signaling and/or the second level control signaling after the second level control signaling takes effect.

or,

in a case that the first level control signaling schedules uplink transmission, the second level control signaling includes at least one of:

Optionally, as shown in fig. 15, the apparatus further includes a feedback module 1304, wherein:

a feedback module 1304, configured to generate 1-bit HARQ-ACK feedback information if the second-level control signaling is second DCI and the terminal detects the second DCI, where a value of the HARQ-ACK feedback information is ACK or ACK

A feedback module 1304, configured to generate an ACK if the second-level control signaling is a MAC CE and the terminal successfully demodulates the MAC CE, and generate a negative acknowledgement NACK if the second-level control signaling is a MAC CE and the terminal does not successfully demodulate the MAC CE.

Optionally, as shown in fig. 16, the apparatus further includes:

a switching module 1305, configured to switch to monitor a PDCCH on a default search space group or stop acquiring the first level control signaling and/or the second level control signaling if the connection fails to demodulate the signal for M times.

Optionally, the first level control signaling includes at least one of:

the method comprises the steps of carrier indication, time domain resource allocation indication, mapping relation between virtual resource blocks VRB and physical resource blocks PRB, redundancy version, HARQ process number, downlink allocation indication, PUCCH resource indication fed back by PDSCH, PDSCH-to-HARQ feedback timing indication, physical resource blocks PRB binding size indication, rate matching indication and DMRS initialization sequence.

Optionally, in the case that the first-level control signaling schedules downlink transmission, the control information carried by the second-level control signaling includes at least one of the following items: modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication and new transmission data indication;

or, in a case that the first-level control signaling schedules uplink transmission, the control information in the second-level control signaling includes at least one of: the method comprises the following steps of modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, new data transmission indication, uplink shared channel (UL-SCH) indication and open loop indication.

The control signaling obtaining apparatus provided in the embodiment of the present invention can implement each process in the method embodiment of fig. 2, and for avoiding repetition, details are not described here, and the coverage effect of the control signaling can be improved.

It should be noted that, the control signaling acquisition in the embodiment of the present application may be a device, and may also be a component, an integrated circuit, or a chip in a terminal.

Referring to fig. 17, fig. 17 is a structural diagram of control signaling acquisition according to an embodiment of the present application, and as shown in fig. 17, the control signaling acquisition 1700 includes:

an obtaining module 1701, configured to obtain a third DCI, where the third DCI includes compressed control information or jointly encoded control information, where the compressed control information refers to that a configurable bit of the control information is smaller than a preset configurable bit;

an executing module 1702, configured to execute signal receiving and demodulating or execute signal sending according to the third DCI.

Optionally, the compressed control information includes at least one of:

The compressed frequency domain resource allocation indication means that a maximum configurable bit of the frequency domain resource allocation indication is lower than a second maximum configurable bit.

The control signaling obtaining apparatus provided in the embodiment of the present invention can implement each process in the method embodiment of fig. 3, and for avoiding repetition, details are not described here, and the coverage effect of the control signaling can be improved.

Referring to fig. 18, fig. 18 is a structural diagram of a control signaling sending apparatus according to an embodiment of the present application, and as shown in fig. 18, the control signaling sending 1800 includes:

a first sending module 1801, configured to send a first level control signaling, where the first level control signaling carries basic control information;

a second sending module 1802, configured to send a second-level control signaling, where control information carried in the second-level control signaling is used for at least one of:

indicating other control information.

or, in a case that the first level control signaling schedules uplink transmission, the basic control information includes at least one of:

the method comprises the following steps of modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, new data transmission indication, uplink shared channel UL-SCH indication and open loop indication.

Optionally, the step of sending the second level control signaling includes:

Optionally, the basic control information includes at least one of:

Optionally, the feedback information includes at least one of the following:

the automatic hybrid repeat request HARQ feedback of the second-level control signaling indicates the physical uplink control channel PUCCH resource;

Optionally, the detection and/or demodulation parameter of the second level control signaling includes at least one of the following:

Optionally, the second level control signaling is a second DCI or a media access control element MAC CE, where the second DCI is borne on a PDCCH or the second DCI is multiplexed on a PDSCH.

or,

the effective time delay indication, the carrier indication, the time domain resource allocation indication, the redundancy version, the HARQ process number, the downlink allocation index, the TPC command of a scheduled Physical Uplink Shared Channel (PUSCH), an antenna port, the SRS request, the initialization of a DMRS sequence, the BWP indication of a bandwidth part, the sleep indication of a secondary cell, the CBG transmission indication of a code block group, the PHY priority identification of a physical layer, the uplink or supplementary uplink indication, the SRS resource indication, the precoding information and the number of layers, the beta offset indication, the correlation indication of the DMRS and a phase tracking reference signal PTRS and the invalid symbol pattern indication of the second-level control signaling.

Optionally, the first level control signaling includes at least one of:

Optionally, in a case that the first level control signaling schedules downlink transmission, the control information carried by the second level control signaling includes at least one of the following: modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication and new transmission data indication;

Optionally, all or part of the basic control information in the first-level control signaling adopts joint coding.

The control signaling sending apparatus provided in the embodiment of the present invention can implement each process in the method embodiment of fig. 4, and for avoiding repetition, details are not described here, and the coverage effect of the control signaling can be improved.

The control signaling transmission device in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal.

Referring to fig. 19, fig. 19 is a structural diagram of another control signaling transmission apparatus according to an embodiment of the present application, and as shown in fig. 19, a control signaling transmission 1900 includes:

a sending module 1901, configured to send a third DCI, where the third DCI includes compressed control information or jointly encoded control information, and the compressed control information refers to that a configurable bit of the control information is smaller than a preset configurable bit.

Optionally, the compressed control information includes at least one of:

The control signaling sending apparatus provided in the embodiment of the present invention can implement each process in the method embodiment of fig. 5, and in order to avoid repetition, details are not repeated here, and the coverage effect of the control signaling can be improved.

It should be noted that the control signaling sending device in the embodiment of the present application may be a device, and may also be a component, an integrated circuit, or a chip in the terminal.

Fig. 20 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application.

The terminal 2000 includes but is not limited to: a radio frequency unit 2001, a network module 2002, an audio output unit 2003, an input unit 2004, a sensor 2005, a display unit 2006, a user input unit 2007, an interface unit 2008, a memory 2009, and a processor 2010.

Those skilled in the art will appreciate that terminal 2000 may further include a power source (e.g., a battery) for supplying power to various components, and the power source may be logically connected to processor 2010 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system. The electronic device structure shown in fig. 20 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description thereof is omitted.

In one embodiment, the radio frequency unit 2001 is configured to:

indicating other control information.

Optionally, the radio frequency unit 2001 is further configured to:

according to the first-level control signaling and/or the second-level control signaling, signal receiving and demodulation are executed; or alternatively

or, in a case that the first-level control signaling schedules uplink transmission, the basic control information includes at least one of: the method comprises the following steps of modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication, new data transmission indication, uplink shared channel UL-SCH indication and open loop indication.

Optionally, the step of obtaining the second-level control signaling includes:

and under the condition that the first-stage control signaling indicates that second-stage control signaling is obtained, obtaining the second-stage control signaling.

Optionally, the basic control information includes at least one of:

Optionally, the feedback information includes at least one of:

Optionally, the network side configures or agrees to agree on the effective time delay of the second level control signaling, and the terminal applies the indication of the second level control signaling in the first time slot after the effective time delay of the second level control signaling, where the effective time delay is greater than or equal to 0 time slots.

Optionally, the performing signal receiving and demodulating according to the first-level control signaling and/or the second-level control signaling includes:

and after the second-level control signaling takes effect, executing signal transmission according to the first-level control signaling and/or the second-level control signaling.

or,

Optionally, the radio frequency unit 2001 is further configured to:

Optionally, the first level control signaling includes at least one of:

In another embodiment, the radio frequency unit 2001 is used to:

acquiring third DCI, wherein the third DCI comprises compressed control information or joint coded control information, and the compressed control information means that configurable bits of the control information are smaller than preset configurable bits;

and according to the third DCI, performing signal receiving and demodulation or performing signal transmission.

Optionally, the compressed control information includes at least one of:

The embodiment can improve the coverage effect of the control signaling.

Optionally, an embodiment of the present invention further provides a terminal, which includes a processor 2010, a memory 2009, and a program or an instruction that is stored in the memory 2009 and is executable on the processor 2010, where the program or the instruction is executed by the processor 2010 to implement each process of the foregoing control signaling obtaining method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Referring to fig. 21, fig. 21 is a structural diagram of a network-side device according to an embodiment of the present invention, and as shown in fig. 21, the network-side device 2100 includes: a processor 2101, a transceiver 2102, a memory 2103, and a bus interface, wherein:

in one embodiment, a transceiver 2102 for:

indicating other control information.

Optionally, the step of sending the second level control signaling includes:

Optionally, in a case that the first level control signaling indicates that the second level control signaling is not to be acquired, the second level control signaling is not sent, and the basic control information includes an indication field used for indicating whether to acquire the second level control signaling.

Optionally, the basic control information includes at least one of:

Optionally, the feedback information includes at least one of:

or,

Optionally, the first level control signaling includes at least one of:

A maximum configurable bit of a frequency domain resource allocation indication in the basic control information is lower than a second maximum configurable bit.

In another embodiment, a transceiver 2102 for:

and sending a third DCI, wherein the third DCI comprises compressed control information or jointly coded control information, and the compressed control information means that the configurable bits of the control information are smaller than preset configurable bits.

Optionally, the compressed control information includes at least one of:

The embodiment can improve the coverage effect of the control signaling.

Wherein a transceiver 2102 for receiving and transmitting data under control of the processor 2101, the transceiver 2102 comprising at least two antenna ports.

In FIG. 21, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 2101, and various circuits of memory, represented by the memory 2103, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 2102 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 2101 is responsible for managing the bus architecture and general processing, and the memory 2103 may store data used by the processor 2101 when performing operations.

Preferably, an embodiment of the present invention further provides a network-side device, which includes a processor 2101, a memory 2103, and a program or an instruction stored in the memory 2103 and executable on the processor 2101, where the program or the instruction is executed by the processor 2101 to implement each process of the above-described control signaling sending method embodiment, and may achieve the same technical effect, and in order to avoid repetition, details are not described here again.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned control signaling obtaining method or the control signaling sending method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor is the processor in the terminal or the network device in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the information acquisition method or the information determination method, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' ...does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the present embodiments are not limited to those precise embodiments, which are intended to be illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the appended claims.

Claims

1. A control signaling obtaining method is applied to a terminal, and is characterized by comprising the following steps:

indicating other control information;

the step of obtaining the second level control signaling includes:

under the condition that the first-stage control signaling indicates that second-stage control signaling is obtained, obtaining the second-stage control signaling;

the basic control information includes at least one of:

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

3. The method of claim 1, wherein in case of the first level control signaling scheduling downlink transmission, the basic control information comprises at least one of: modulation and coding mode indication, control information DCI format identification, frequency domain resource allocation indication and new transmission data indication;

4. The method of claim 1, wherein in a case that the first level control signaling indicates not to acquire second level control signaling, the second level control signaling is not acquired, and the basic control information comprises an indication field for indicating whether to acquire the second level control signaling.

5. The method of claim 1, wherein the feedback information comprises at least one of:

6. The method of claim 1, wherein the detection and/or demodulation parameters of the second level control signaling comprise at least one of:

7. The method of claim 1, wherein the first level control signaling is a first DCI, a format and/or content of the first DCI is agreed by a network side configuration or a protocol, and the first DCI is a terminal-specific DCI or the first DCI is a group-common DCI.

8. The method of claim 1, wherein the transmission resources for the second level control signaling are dynamically allocated, semi-statically allocated, or statically allocated.

9. The method of claim 1, wherein the second level control signaling is terminal-specific second level control signaling or the second level control signaling is group-common second level control signaling.

10. The method of claim 1, wherein the second level of control signaling is a second DCI or a media access control unit (MAC CE), wherein the second DCI is carried on a Physical Downlink Control Channel (PDCCH) or the second DCI is multiplexed on a physical downlink data channel (PDSCH).

11. The method of claim 10, wherein the second DCI is multiplexed on the PDSCH through rate matching or puncturing.

12. The method of claim 1, wherein a network side configures or agrees to agree on an effective delay of the second level control signaling, and the terminal applies the indication of the second level control signaling in a first time slot after the effective delay of the second level control signaling, wherein the effective delay is greater than or equal to 0 time slots.

13. The method of claim 12, wherein the validation delay refers to a time interval between an end time of a slot in which the second level control signaling is located and a start time of a first slot in which the second level control signaling is applied, or wherein the validation delay refers to a time interval between a start time of a slot in which the second level control signaling is located and a start time of a first slot in which the second level control signaling is applied.

14. The method of claim 2, wherein said performing signal reception and demodulation in accordance with said first level control signaling and/or said second level control signaling comprises:

15. The method of claim 1, wherein in a case where the first level control signaling schedules downlink transmission, the control information carried by the second level control signaling comprises at least one of:

or,

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

17. The method of claim 2, wherein the method further comprises:

18. The method of any one of claims 1 to 15, wherein the first level control signaling comprises at least one of:

19. The method according to any one of claims 1 to 15, wherein in case that said first level control signaling schedules downlink transmission, the control information carried by said second level control signaling comprises at least one of: modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication and new transmission data indication;

20. The method of claim 3, wherein a configurable bit of the modulation and coding scheme indication in the basic control information is lower than a first configuration bit; and/or

21. The method of claim 1, wherein all or part of basic control information in the first level control signaling employs joint coding.

22. A control signaling sending method is applied to network side equipment, and is characterized by comprising the following steps:

indicating other control information;

the step of sending the second level control signaling includes:

under the condition that the first-stage control signaling indicates that second-stage control signaling is obtained, sending the second-stage control signaling;

the basic control information includes at least one of:

23. The method of claim 22, wherein in case the first level control signaling schedules downlink transmission, the basic control information comprises at least one of: modulation and coding mode indication, control information DCI format identification, frequency domain resource allocation indication and new transmission data indication;

24. The method of claim 22, wherein in a case that the first level control signaling indicates not to acquire second level control signaling, the second level control signaling is not sent, and the basic control information comprises an indication field for indicating whether to acquire the second level control signaling.

25. The method of claim 22, wherein the feedback information comprises at least one of:

26. The method of claim 22, wherein the detection and/or demodulation parameters of the second level control signaling comprise at least one of:

27. The method of claim 22, wherein the first level control signaling is a first DCI, a format and/or content of the first DCI is agreed by a network side configuration or protocol, and the first DCI is a terminal-specific DCI or the first DCI is a group-common DCI.

28. The method of claim 22, wherein the transmission resources for the second level control signaling are dynamically allocated, semi-statically allocated, or statically allocated.

29. The method of claim 22, wherein the second level control signaling is terminal-specific second level control signaling or the second level control signaling is group-common second level control signaling.

30. The method of claim 22, wherein the second level of control signaling is a second DCI or a media access control unit (MAC CE), wherein the second DCI is carried on a Physical Downlink Control Channel (PDCCH) or multiplexed on a physical downlink data channel (PDSCH).

31. The method of claim 30, wherein the second DCI is multiplexed on the PDSCH through rate matching or puncturing.

32. The method of claim 22, wherein a network side configuration or protocol specifies a validation delay of the second level control signaling, and the terminal applies the indication of the second level control signaling in a first time slot after the validation delay of the second level control signaling, wherein the validation delay is greater than or equal to 0 time slots.

33. The method of claim 32, wherein the validation delay refers to a time interval between an end time of a slot in which the second level control signaling is located and a start time of a first slot in which the second level control signaling is applied, or wherein the validation delay refers to a time interval between a start time of a slot in which the second level control signaling is located and a start time of a first slot in which the second level control signaling is applied.

34. The method of claim 22, wherein in case that the first level control signaling schedules downlink transmission, the control information carried by the second level control signaling comprises at least one of:

or,

35. The method of any of claims 22 to 34, wherein the first level control signaling comprises at least one of:

36. The method according to any of claims 22 to 34, wherein in case that the first level control signaling schedules downlink transmission, the control information carried by the second level control signaling comprises at least one of: modulation and coding mode indication, DCI format identification, frequency domain resource allocation indication and new transmission data indication;

37. The method of claim 23, wherein the configurable bits of the modulation and coding scheme indication in the basic control information are lower than the first configuration bits; and/or

38. The method of claim 22, wherein all or a portion of basic control information in the first level of control signaling employs joint coding.

39. A control signaling obtaining device is applied to a terminal, and is characterized by comprising:

a first obtaining module, configured to obtain a first level control signaling, where the first level control signaling carries basic control information;

indicating other control information;

the second obtaining module is specifically configured to:

the basic control information includes at least one of:

40. A control signaling sending device applied to a network side device is characterized by comprising:

a first sending module, configured to send a first-level control signaling, where the first-level control signaling carries basic control information;

indicating other control information;

the second sending module is specifically configured to:

the basic control information includes at least one of:

41. A terminal, comprising: memory, processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps in the control signaling acquisition method according to any of claims 1 to 21.

42. A network-side device, comprising: memory, processor and program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps in the method for control signaling according to any of claims 22 to 38.

43. A readable storage medium, characterized in that a program or instructions are stored thereon, which program or instructions, when executed by a processor, implement the steps in the control signaling acquisition method according to any one of claims 1 to 21 or which program or instructions, when executed by a processor, implement the steps in the control signaling transmission method according to any one of claims 22 to 38.