CN112311514A

CN112311514A - Control information transmission method and device

Info

Publication number: CN112311514A
Application number: CN201910697063.XA
Authority: CN
Inventors: 刘哲; 董朋朋; 彭金磷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2021-02-02
Anticipated expiration: 2039-07-30
Also published as: CN112311514B; WO2021017995A1

Abstract

The embodiment of the application provides a control information transmission method and a control information transmission device, wherein the method comprises the following steps: the network equipment transmits control information on the first CCE and transmits the control information on one or more second CCEs; accordingly, the terminal device receives the control information on the first CCE and the control information on the one or more second CCEs. The first CCE and the one or more second CCEs are included in a CORESET, where the CORESET includes N CCEs, N is an integer greater than 1, and the number of the N CCEs satisfies a numbering rule of a time domain before a frequency domain. By adopting the embodiment of the application, under the condition that the two communication systems share the frequency spectrum resource but use different SCSs, the transmission interference between the two communication systems can be reduced.

Description

Control information transmission method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a control information transmission method and device.

Background

With the development of communication technology, New Radio (NR) (or fifth generation mobile communication) (5)^thGeneration, 5G)) system. After the NR system is generated, it does not completely replace the Long Term Evolution (LTE) system immediately, and both coexist for a long time and can share the sameAnd air interface resources such as time domain resources, frequency domain resources, space domain resources and the like. For example, to improve cell coverage and fully utilize unused spectrum resources of carriers in the LTE system, carriers in the NR system may be deployed on the same frequency domain resources as carriers in the LTE system.

The LTE system may support subcarrier spacing (SCS) of 15 kilohertz (kHz). To support various traffic types and/or application scenarios, NR systems may support multiple types of subcarrier spacings, e.g., 15kHz, 30kHz, 60kHz, 120kHz, etc. If the SCS used by the LTE system is not consistent with the SCS used by the NR system on the shared spectrum resources, interference between the LTE system and the NR system will be caused.

Disclosure of Invention

The embodiment of the application provides a method and a device for transmitting control information, which can reduce transmission interference between two communication systems under the condition that the two communication systems share frequency spectrum resources but use different SCSs.

A first aspect of the embodiments of the present application provides a control information transmission method, which may be executed by a terminal or a component (e.g., a processor, a chip, or a system-on-chip) of the terminal, and includes:

receiving control information on a first Control Channel Element (CCE);

receiving the control information on one or more second CCEs;

the first CCE and the one or more second CCEs are included in a control resource set (core set), where the core set includes N CCEs, N is an integer greater than 1, and the number of the N CCEs satisfies a numbering rule of a time domain before a frequency domain.

In the first aspect of the embodiment of the present application, receiving control information on the first CCE and receiving the control information on the one or more second CCEs may implement time-domain retransmission of the control information, so as to reduce transmission interference between two communication systems sharing a spectrum resource but using different SCS, where a CCE number meeting a numbering rule of first time domain and then frequency domain is a basis for implementing time-domain retransmission interference reduction.

In one possible implementation, the CORESET includes M Resource Element Groups (REGs), the numbers of the M REGs satisfy a numbering rule of a frequency domain before a time domain, and M is an integer greater than 1. The combination of the numbering rule of REG and the numbering rule of CCE is the basis for achieving interference reduction in time domain repeated transmission.

In a possible implementation manner, when a resource of any one of the first CCE and the one or more second CCEs coincides with a rate matching resource, the control information is carried by a resource other than the rate matching resource in the resource of the CORESET, that is, a resource other than the rate matching resource in the resource of the CORESET may carry the control information. Therefore, more resources for bearing control information are provided, and less resources are occupied by the rate matching resources.

In a possible implementation manner, first configuration information is received, and rate matching resources are determined according to the first configuration information, where a subcarrier spacing SCS corresponding to the rate matching resources is different from an SCS corresponding to resources indicated by the first configuration information. Assume that the SCS corresponding to the rate matching resource is the first SCS, the SCS corresponding to the resource indicated by the first configuration information is the second SCS, and the first SCS is the second SCS 2ⁿMultiple, n is a positive integer.

The first configuration information is used to indicate the resources of the reference signal corresponding to the second SCS, and the rate matching resources, i.e., the rate matching resources on the bandwidth part (BWP) of the first SCS, can be determined according to the resources of the reference signal corresponding to the second SCS and the relationship between the first SCS and the second SCS, and the resources of the reference signal corresponding to the second SCS are the rate matching resources of the second SCS.

And determining rate matching resources, so that when the resources of any one of the first CCE and the one or more second CCEs coincide with the rate matching resources, which resources carry control information and which resources do not carry control information can be determined.

In one possible implementation manner, capability information is sent, where the capability information indicates a parsing time required for parsing the control information, and the parsing time is less than or equal to a first threshold, where the first threshold is a minimum time interval between starting parsing the control information and sending uplink data. And sending the capability information so that the network equipment can flexibly configure the search space position for the terminal according to the capability information.

In a possible implementation manner, second configuration information is received, where the second configuration information configures a starting time domain position for receiving the control information, and a sum of the starting time domain position of the control information, a time domain length of the CORESET, and the parsing time is smaller than a second threshold, where the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

In one possible implementation manner, the resources of the CORESET, that is, the resources of the control information, may be determined according to the CORESET configuration information and the second configuration information.

When receiving control information in a resource of the control information, the control information is received on the first CCE, the control information is received on the one or more second CCEs, and the numbering rule of the CCEs is that the time domain is first and then the frequency domain is second, so that the transmission interference can be avoided, and the capacity of the control information is large enough to schedule more terminals to transmit downlink data.

A second aspect of the embodiments of the present application provides a communication device, which may be a terminal, a device in a terminal, or a device capable of being used in cooperation with a terminal. In one design, the apparatus may include a module corresponding to performing the method/operation/step/action described in the first aspect, and the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a transceiver module. In an exemplary manner, the first and second electrodes are,

a transceiver module, configured to receive control information on a first control channel element CCE; receiving the control information on one or more second CCEs;

the first CCE and the one or more second CCEs are included in a control resource set CORESET, where the CORESET includes N CCEs, N is an integer greater than 1, and the number of the N CCEs satisfies a numbering rule of a time domain and a frequency domain.

In one possible implementation, the CORESET includes M resource element groups REG, the numbering of the M REGs satisfies the numbering rule of the first frequency domain and the second time domain, and M is an integer greater than 1. The combination of the numbering rule of REG and the numbering rule of CCE is the basis for interference avoidance in time domain repeated transmission.

In a possible implementation manner, the apparatus further includes a processing module, where the processing module is configured to determine that, when a resource of any one of the first CCE and the one or more second CCEs coincides with a rate matching resource, the control information is carried by a resource other than the rate matching resource in the resource of the CORESET, that is, a resource other than the rate matching resource in the resource of the CORESET may carry the control information. Therefore, more resources for bearing control information are provided, and less resources are occupied by the rate matching resources.

In a possible implementation manner, the transceiver module is further configured to receive first configuration information; the processing module is further configured to determine a rate matching resource according to the first configuration information, where an interval SCS of subcarriers corresponding to the rate matching resource is different from an SCS corresponding to a resource indicated by the first configuration information. Assume that the SCS corresponding to the rate matching resource is the first SCS, the SCS corresponding to the resource indicated by the first configuration information is the second SCS, and the first SCS is the second SCS 2ⁿMultiple, n is a positive integer.

The processing module determines a rate matching resource according to the reference signal resource corresponding to the second SCS and the relationship between the first SCS and the second SCS, wherein the rate matching resource is a rate matching resource on the BWP of the first SCS, and the reference signal resource corresponding to the second SCS is a rate matching resource of the second SCS.

The processing module determines a rate matching resource, so that when a resource of any CCE of the first CCE and the one or more second CCEs coincides with the rate matching resource, it may be determined on which resources control information is carried and on which resources control information is not carried.

In a possible implementation manner, the transceiver module is further configured to send capability information, where the capability information indicates a parsing time required for parsing the control information, and the parsing time is less than or equal to a first threshold, where the first threshold is a minimum time interval between starting parsing the control information and sending uplink data. And sending the capability information so that the network equipment can flexibly configure the search space position for the terminal according to the capability information.

In a possible implementation manner, the transceiver module is further configured to receive second configuration information, where the second configuration information configures an initial time domain position for receiving the control information, and a sum of the initial time domain position of the control information, a time domain length of the CORESET, and the parsing time is smaller than a second threshold, where the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

In a possible implementation manner, the processing module is further configured to determine, according to the CORESET configuration information and the second configuration information, resources of the CORESET, that is, resources of the control information.

A third aspect of the embodiments of the present application provides a communication apparatus, which includes a processor and is configured to implement the method described in the first aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may cause the apparatus to perform the method described in the first aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be a network device, etc. In one possible design, the apparatus includes:

a memory for storing program instructions;

a processor for controlling the communication interface to receive control information on a first control channel element, CCE; receiving the control information on one or more second CCEs;

In a possible implementation manner, the processor is further configured to determine that, when a resource of any CCE of the first CCE and the one or more second CCEs coincides with a rate matching resource, the control information is carried by a resource other than the rate matching resource in the resource of the CORESET, that is, a resource other than the rate matching resource in the resource of the CORESET may carry control information. Therefore, more resources for bearing control information are provided, and less resources are occupied by the rate matching resources.

In a possible implementation manner, the processor is further configured to control the communication interface to receive the first configuration information, and determine, according to the first configuration information, a rate matching resource, where an SCS of a subcarrier spacing corresponding to the rate matching resource is different from an SCS of a resource indicated by the first configuration information. Assume that the SCS corresponding to the rate matching resource is the first SCS, the SCS corresponding to the resource indicated by the first configuration information is the second SCS, and the first SCS is the second SCS 2ⁿMultiple, n is a positive integer.

The processor may determine a rate matching resource according to the resource of the reference signal corresponding to the second SCS and a relationship between the first SCS and the second SCS, where the rate matching resource is a rate matching resource on the BWP of the first SCS, and the resource of the reference signal corresponding to the second SCS is a rate matching resource of the second SCS.

The processor determines rate matching resources so that when a resource of any one of the first CCE and the one or more second CCEs coincides with a rate matching resource, it can determine on which resources control information is carried and on which resources control information is not carried.

In a possible implementation manner, the processor is further configured to control the communication interface to send capability information, where the capability information indicates a parsing time required for parsing the control information, and the parsing time is less than or equal to a first threshold, where the first threshold is a minimum time interval between starting parsing the control information and sending uplink data. And sending the capability information so that the network equipment can flexibly configure the search space position for the terminal according to the capability information.

In a possible implementation manner, the processor is further configured to control the communication interface to receive second configuration information, where the second configuration information configures a starting time domain position for receiving the control information, a sum of the starting time domain position of the control information, a time domain length of the CORESET, and the parsing time is smaller than a second threshold, the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

In a possible implementation manner, the processor is further configured to determine, according to the CORESET configuration information and the second configuration information, resources of CORESET, that is, resources of the control information.

A fourth aspect of embodiments of the present application provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method provided in the first aspect.

A fifth aspect of the embodiments of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method provided in the first aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

A sixth aspect of the embodiments of the present application provides a method for transmitting control information, where the method may be executed by a network device, or may be executed by a component (e.g., a processor, a chip, or a system-on-chip) of the network device, and the method includes:

transmitting control information on a first control channel element, CCE;

transmitting the control information on one or more second CCEs;

In the sixth aspect of the embodiment of the present application, control information is sent on the first CCE, and the control information is sent on the one or more second CCEs, so that time-domain repeated transmission of the control information can be achieved, and further transmission interference between two communication systems sharing a spectrum resource but using different SCS can be reduced, where a CCE number meeting a numbering rule of first time domain and then frequency domain is a basis for achieving interference avoidance in time-domain repeated transmission.

In one possible implementation manner, first configuration information is sent, where the first configuration information is used to determine a rate matching resource, and a subcarrier spacing SCS corresponding to the rate matching resource is different from an SCS corresponding to a resource indicated by the first configuration information. Assume that the SCS corresponding to the rate matching resource is the first SCS, the SCS corresponding to the resource indicated by the first configuration information is the second SCS, and the first SCS is the second SCS 2ⁿMultiple, n is a positive integer.

In one possible implementation, capability information is received, the capability information indicating a parsing time required to parse the control information. In case of receiving the capability information, a search space position, i.e., a starting time domain position at which the control information is received, may be flexibly configured according to the capability information.

In a possible implementation manner, second configuration information is sent, where the second configuration information configures a start time domain position of the control information, and a sum of the start time domain position of the control information, a time domain length of the CORESET, and the parsing time is smaller than a second threshold, where the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

A seventh aspect of the embodiments of the present application provides a communication apparatus, where the communication apparatus may be a network device, may also be an apparatus in a network device, or may be an apparatus capable of being used in cooperation with a network device. In one design, the apparatus may include a module corresponding to performing the method/operation/step/action described in the sixth aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a transceiver module. In an exemplary manner, the first and second electrodes are,

a transceiver module configured to transmit the control information on one or more second CCEs;

In a possible implementation manner, the transceiver module is further configured to send first configuration information, where the first configuration information is used to determine a rate matching resource, and a subcarrier spacing SCS corresponding to the rate matching resource is different from an SCS corresponding to a resource indicated by the first configuration information. Assume that the SCS corresponding to the rate matching resource is the first SCS, the SCS corresponding to the resource indicated by the first configuration information is the second SCS, and the first SCS is the second SCS 2ⁿMultiple, n is a positive integer.

In a possible implementation manner, the transceiver module is further configured to receive capability information, where the capability information indicates a parsing time required for parsing the control information. In case of receiving the capability information, the processing module may flexibly configure a search space location, i.e., a starting time domain location for receiving the control information, according to the capability information.

In a possible implementation manner, the transceiver module is further configured to send second configuration information, where the second configuration information configures a starting time domain position of the control information, and a sum of the starting time domain position of the control information, a time domain length of the CORESET, and the parsing time is smaller than a second threshold, where the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

An eighth aspect of the present embodiment provides a communication apparatus, which includes a processor and is configured to implement the method described in the sixth aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may cause the apparatus to perform the method described in the sixth aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module or other type of communication interface, which may be terminals, etc. In one possible design, the apparatus includes:

a memory for storing program instructions;

a processor configured to control a communication interface to transmit the control information on one or more second CCEs;

In one possible implementation, the processor is further configured to control the communication interface to send first configuration information, where the first configuration information is used to determine a rate matching resource, and a sub-carrier spacing SCS corresponding to the rate matching resource is different from an SCS corresponding to a resource indicated by the first configuration information. Assume that the SCS corresponding to the rate matching resource is the first SCS, the SCS corresponding to the resource indicated by the first configuration information is the second SCS, and the first SCS is the second SCS 2ⁿMultiple, n is a positive integer.

In one possible implementation, the processor is further configured to control the communication interface to receive capability information indicating a parsing time required to parse the control information. In case of receiving the capability information, the processor may flexibly configure a search space location, i.e., a starting time domain location for receiving the control information, according to the capability information.

In a possible implementation manner, the processor is further configured to control the communication interface to send second configuration information, where the second configuration information configures a starting time domain position of the control information, and a sum of the starting time domain position of the control information, a time domain length of the CORESET, and the parsing time is smaller than a second threshold, where the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

A ninth aspect of embodiments of the present application provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method provided by the sixth aspect.

A tenth aspect of the present embodiment provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method provided in the sixth aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

An eleventh aspect of an embodiment of the present application provides a communication system, where the system includes a terminal provided in the third aspect and a network device provided in the seventh aspect; or a terminal provided by the fourth aspect and a network device provided by the eighth aspect.

Drawings

Fig. 1 is an exemplary diagram of time-frequency resources occupied by reference signals;

FIG. 2 is an exemplary diagram of a cyclic prefix;

FIG. 3 is another exemplary diagram of a cyclic prefix;

FIG. 4 is an exemplary diagram of a cyclic suffix;

FIG. 5a is an exemplary diagram of a non-interleaved map;

FIG. 5b is an exemplary diagram of an interleaving map;

FIG. 6(A) is an exemplary diagram of a resource grid;

FIG. 6(B) is an exemplary diagram of another resource grid;

FIG. 7(A) is a schematic diagram of a spectrum corresponding to FIG. 6 (A);

FIG. 7(B) is a schematic diagram of a frequency spectrum corresponding to FIG. 6 (B);

FIG. 8 is a diagram illustrating a network architecture to which embodiments of the present application are applied;

fig. 9 is a flowchart illustrating a control information transmission method according to an embodiment of the present application;

FIG. 10a is an exemplary diagram of a non-interleaved map provided by an embodiment of the present application;

FIG. 10b is a diagram of an example interleaving map provided by an embodiment of the present application;

fig. 11 is an exemplary diagram of a cyclic prefix and cyclic suffix provided by an embodiment of the present application;

fig. 12 is a diagram illustrating an example of repeatedly transmitting control information according to an embodiment of the present application;

fig. 13a is a diagram illustrating an exemplary cyclic prefix provided by an embodiment of the present application;

fig. 13b is a diagram of another example of a cyclic prefix provided in an embodiment of the present application;

fig. 14 is a diagram of another example of repeated transmission of control information according to an embodiment of the present application;

fig. 15(a) is a schematic diagram of a spectrum provided in an embodiment of the present application;

FIG. 15(B) is another exemplary spectrum diagram provided in the embodiments of the present application;

fig. 15(C) is a schematic diagram of another spectrum provided in the embodiment of the present application;

FIG. 15(D) is a schematic diagram of another spectrum provided by an embodiment of the present application;

FIG. 16(A) is an exemplary diagram of a resource grid provided by an embodiment of the present application;

FIG. 16(B) is an exemplary diagram of another resource grid provided by an embodiment of the present application

Fig. 17 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 19 is another schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the embodiments of the present application, unless otherwise specified, "/" indicates a relationship in which the objects associated before and after are "or", for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b and c can be single or multiple. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish technical features having substantially the same or similar functions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

Predefinition in this application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

To facilitate understanding, the following description is made of terms or techniques related to embodiments of the present application.

1. Resource grid, Resource Element (RE), slot, Resource Block (RB)

And the resource grid is used for representing time-frequency resources for data transmission.

The RE is a resource unit for data transmission or a resource unit for resource mapping of data to be transmitted. One RE may be used to map one complex symbol, e.g., a complex symbol obtained through modulation, or a complex symbol obtained through precoding. For example, one RE corresponds to 1 symbol in the time domain and 1 subcarrier in the frequency domain. The symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a discrete fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S-OFDM) symbol, or the like. In the embodiment of the present application, an OFDM symbol is taken as an example.

Slots (slots) may be defined in the time domain of the resource grid or time-frequency resources, and a slot may include a positive integer number of symbols, e.g., 7, 14, 6, or 12. One subframe may include a positive integer number of slots. Illustratively, for a system supporting multiple subcarrier spacings, 1 slot is included in one subframe when the subcarrier spacing is 15 kilohertz (kHz); when the subcarrier spacing is 30kHz, one subframe includes 2 slots; when the subcarrier interval is 60kHz, 4 slots are included in one subframe.

In the frequency domain, RBs may be defined in a resource grid. A positive integer number of subcarriers, e.g., 6 or 12, may be included in one RB in the frequency domain. The definition of RB can also be extended to the time domain, e.g., one RB includes a positive integer number of subcarriers in the frequency domain and a positive integer number of symbols in the time domain, e.g., one RB is a time-frequency resource block including 12 subcarriers in the frequency domain and 7 or 14 symbols in the time domain.

In the embodiment of the present application, the subcarrier number or subcarrier index may start from "0", and the number or index of the OFDM symbol may also start from "0". In a bandwidth part (BWP), the subcarrier number of REs may be 0 to 12 × K-1, where K is the number of RBs included in the BWP in the frequency domain.

In the embodiment of the present application, the index of the RE includes a subcarrier number and a number of an OFDM symbol. The index of RE can be represented as (k, l). Where k denotes a subcarrier number and l denotes a number of an OFDM symbol. As illustrated in connection with fig. 1, each row of the resource grid shown in fig. 1 represents one subcarrier, each column represents one OFDM symbol, and each square represents one RE. Illustratively, the index of the first RE in the lower left corner of the resource grid shown in fig. 1 is (0, 0).

For convenience of description, in the embodiments of the present application, (k, l) may be used to represent a corresponding RE, which is described herein in a unified manner and is not described in detail below.

2. Subcarrier spacing, OFDM symbol, cyclic prefix, cyclic suffix

A communication system may support multiple parameter sets (numerologies). numerology may be defined by one or more of the following parameter information: subcarrier spacing, Cyclic Prefix (CP), time unit, bandwidth, etc. For example, numerology may be defined by subcarrier spacing and CP.

The subcarrier spacing is used to describe the bandwidth of the subcarriers or to describe the spacing between adjacent subcarriers and may be an integer greater than "0", such as 15kHz, 30kHz, 60kHz, 120kHz, 240kHz, 480kHz, etc. The different subcarrier spacing may be an integer multiple of 2, or may be designed to be other values.

The CP information may include a CP length and/or a CP type. For example, the CP may be a Normal CP (NCP) or an Extended CP (ECP).

The time unit is used to indicate a time unit in the time domain, and may be, for example, a sampling point, a symbol, a micro slot, a subframe, or a radio frame. The information of the time unit may include a type, a length, or a structure of the time unit, etc. The time unit length may be, for example: the number of symbols included in a slot, and/or the number of symbols or slots included in a subframe, and/or the number of subframes or slots included in a radio frame.

An OFDM symbol is a basic unit of time domain resources. The desired signal and the cyclic prefix may be included in the OFDM symbol, or the desired signal and the cyclic suffix may be included in the OFDM symbol, or the desired signal is included in the OFDM symbol (i.e., the cyclic prefix and cyclic suffix are not included). The useful signal may also be referred to as a time-domain signal. The effective length of the OFDM symbol is the length of the useful signal. The length of the OFDM symbol is equal to the sum of the effective length of the OFDM symbol and the length of the cyclic prefix. A positive integer number of OFDM symbols may be included in one slot. For example, for a normal (normal) CP, one slot may include 14 OFDM symbols. For extended (extended) CP, 1 slot may contain 12 OFDM symbols. In the embodiment of the present application, 1 slot includes 14 OFDM symbols as an example. In 1 slot, 14 OFDM symbols are numbered in order from small to large, that is, one slot includes OFDM symbol #0 to OFDM symbol # 13. Here, OFDM symbol # X denotes the OFDM symbol with the number X.

It should be noted that the length of an OFDM symbol is inversely proportional to the subcarrier spacing. In other words, as the subcarrier spacing increases, the length of the OFDM symbol decreases.

Similar to the length of an OFDM symbol, the length of a slot is also inversely proportional to the subcarrier spacing. In other words, as the subcarrier spacing increases, the length of the slot decreases.

Illustratively, table 1 shows the correspondence between the subcarrier spacing and the length of the OFDM symbol and the length of the slot.

TABLE 1

The cyclic prefix is the copy of the last part of the useful signal in the OFDM symbol to the header of the OFDM symbol. Thus, the OFDM symbol includes a cyclic prefix for making transmission of the OFDM symbol resistant to inter-symbol interference (ISI) and inter-channel interference (ICI) and a useful signal.

As shown in FIG. 2, taking the 15kHz SCS OFDM symbol as an example, the useful signal in the OFDM symbol includes 2048 sampling points, and the cyclic prefix includes the last 144 sampling points (i.e., 1905 to 2048 sampling points) of the useful signal.

As shown in FIG. 3, taking the 30kHz SCS OFDM symbol as an example, the useful signal in the OFDM symbol includes 1024 sampling points, and the cyclic prefix includes the last 72 sampling points (i.e., 953-1024 sampling points) of the useful signal.

For different OFDM symbols of the same SCS, the cyclic prefix length of different OFDM symbols may be the same or different. As can be seen from table 1, taking the 15kHz SCS OFDM symbol as an example, since the absolute time length of one sampling point is 1/(2048 × 15 × 1000) seconds, in order to make the absolute time length of 14 OFDM symbols included in 1 slot be 1ms, for 7 OFDM symbols in every 0.5ms, the cyclic prefix length of the first OFDM symbol is 160 sampling points, and the cyclic prefixes of the other 6 OFDM symbols are 144 sampling points.

The cyclic suffix is the copying of the front portion of the useful signal in the OFDM symbol to the tail of the OFDM symbol. Thus, the OFDM symbol includes a useful signal and a cyclic suffix for enabling the OFDM symbol to be resistant to ISI and ICI.

As shown in FIG. 4, taking the 30kHz SCS OFDM symbol as an example, the useful signal in the OFDM symbol comprises 1024 sampling points, and the cyclic suffix comprises the first 72 sampling points (i.e. No. 1-72 sampling points) of the useful signal.

In the embodiment of the present application, for convenience of description, the sampling points may all be sampling points based on SCS of 15kHz, that is, the time domain lengths of the sampling points of the 15kHz signal or the time intervals between adjacent sampling points are all Ts, and details are not described below.

It is understood that if the number (size) of Fast Fourier Transform (FFT) points of the signal corresponding to 30kHz SCS is 2048, the useful signal in the OFDM symbol of 30kHz SCS also includes 2048 sampling points. In this case, the time domain length of the sampling point of the 30kHz signal is actually 1/(2048 × 30000) seconds, which is equal to Ts/2, i.e. the useful signal of the OFDM symbol of the 30kHz SCS is considered to include 1024 sampling points of the 15kHz SCS.

3. Reference Signal (RS)

The reference signal is a known signal used for channel estimation, channel sounding, data demodulation, or channel measurement. In the embodiment of the present application, the reference signal in the LTE system may include one or more of a cell-specific reference signal (CRS) of LTE, a channel state information-reference signal (CSI-RS) of LTE, or a demodulation reference signal (DMRS) of LTE; the reference signals in an NR system may include CSI-RS of the NR and/or DMRS of the NR. The reference signal in the embodiment of the present application takes LTE CRS as an example.

In the LTE system, a base station may send a CRS to a terminal, and the terminal performs channel estimation using the CRS and demodulates a data channel or a control channel sent by the base station to the terminal according to a result of the channel estimation, thereby obtaining data information or control information sent by the base station for the terminal. To support multiple-input multiple-output (MIMO), the base station may transmit the CRS to the terminal through one or more antenna ports, e.g., through one or 2 or 4 antenna ports.

For example, refer to an exemplary diagram of time-frequency resources occupied by reference signals of LTE shown in fig. 1, which may represent time-frequency resources occupied by LTE CRS when transmitted through one antenna port, and black squares in fig. 1 represent time-frequency resources occupied by LTE CRS.

The RE resource actually occupied by the LTE CRS is related to an offset value (shift) of the LTE CRS, which is a physical cell Identity (ID) modulo (mod)6 of the LTE carrier. The shift of the LTE CRS indicates a shift of time-frequency resources of the LTE CRS in a frequency domain. For example, when the shift of the LTE CRS is "0", the time-frequency resources occupied when the LTE CRS is transmitted through one antenna port are as shown in fig. 1, for example, the 1 st symbol occupies the 1 st subcarrier and the 6 th subcarrier; when the shift of the LTE CRS is "1", the time-frequency resource occupied when transmitting the LTE CRS through one antenna port is shifted by 1 subcarrier on the basis of fig. 1, for example, the 1 st symbol occupies the 2 nd subcarrier and the 7 th subcarrier, and the 5 th symbol occupies the 5 th subcarrier and the 11 th subcarrier. It can be understood that when shift of LTE CRS is "K", K subcarriers are cyclically shifted on the basis of fig. 1.

4. Physical Downlink Control Channel (PDCCH), aggregation level

The transmission of the PDCCH is in the form of a Control Channel Element (CCE), i.e., the CCE is the minimum resource unit of PDCCH transmission. One PDCCH may include one or more CCEs, and the number of CCEs included in one PDCCH is determined by Aggregation Level (AL), which may be specifically referred to in table 2.

TABLE 2

Grade of polymerization	Number of CCEs
		1	1
2	2
		4	4
8	8
		16	16

1 CCE may transmit 1 Downlink Control Information (DCI). If the terminal is far away, the signal is poor, and the PDCCH cannot be demodulated, so that the aggregation level is required to be improved to improve the receiving performance of the PDCCH, so that the far-end terminal can also successfully demodulate the PDCCH.

One CCE includes 6 Resource Element Groups (REGs), and one REG occupies 1 OFDM symbol in the time domain and 1 RB in the frequency domain. One CCE includes 72 REs, one RE carries 2 bits (bits), and one CCE may carry 108 bits except PDCCH DMRS occupying 3 REs within one REG.

REGs may be grouped into REG bundles (bursts) in a time-first (time-first) manner, and then mapped onto the control resource in an interleaving or non-interleaving manner with the REG bursts as granularity. The 1 REG bundle consists of a group of REGs consecutive in time and/or frequency domain, and the size of the 1 REG bundle is equal to the size of REG in frequency domain multiplied by the size of OFDM symbol in time domain, which can be indicated by a high-layer parameter, CORESET-REG-bundle-size.

The NR system introduces the concept of control resource set (CORESET), where one CORESET represents one time-frequency resource set for carrying PDCCH. The 1 CORESET includes one or more RBs in the frequency domain, which may be represented as

May be indicated by a frequency domain resource in an Information Element (IE) higher layer parameter control resource set information element. The 1 CORESET includes 1,2 or 3 OFDM symbols in the time domain, which can be expressed as

May be indicated by a duration in the higher layer parameter control resource set IE, when the higher layer parameter duration is 3, i.e. the number of symbols of the CORESET indicated by the duration is 3,

the number of REGs included in 1 CORESET can be expressed as

The mapping modes of the CCE-REG of 1 CORESET comprise interleaving (interleaved) mapping and non-interleaving (non-interleaved) mapping, and which mapping is actually adopted can be indicated by a high-level parameter CORESET-CCE-REG-mapping-type. The high-level parameters can configure a plurality of CORESETs, and one CORESET corresponds to 1 CCE-REG mapping mode.

The size of REG bundle can be represented as L, the ith REG bundle can be represented as 1 REG set { iL, iL + 1., iL + L-1},

the jth CCE consists of 1 REG bundle set { f (6j/L), f (6j/L +1) }, f (6j/L +6/L-1) }, wherein f (j) represents a mapping relationship, and the mapping relationship can be realized by an interleaver.

For non-interleaved mapping, the mapping relationship may be denoted as f (j) ═ j. For example, fig. 5a is an exemplary diagram of a non-interleaved map. In the context of figure 5a of the drawings,

then

By

One can get i ∈ {0, 1., 23}, i.e. it includes 24 REG bundles, numbered 0,1, …,23, 1 REG bundle includes 2 REGs, 1 CCE consists of 6 REGs, and the CORESET includes 8 CCEs, numbered 0,1 …, 7. In fig. 5a, CCE 0 includes 2 OFDM symbols in the time domain and 3 RBs, REGs 0 to 5, in the frequency domain. In fig. 5a and 5b, the numbering rule of REGs is time domain first and then frequency domain, and the numbering of CCEs shows an increase in frequency domain.

For interleaving mapping, when the duration length of the CORESET is 1, namely the time domain symbols of the CORESET are 1, the size of the REG bundle is {2,6 }; when the CORESET duration length is {2,3}, the size of REG bundle is {2/3,6 }. The mapping relationship can be expressed as

Wherein j ═ cxr + R; r-0, 1., R-1; c-1, · 0, 1;

mod represents the remainder operation. R represents the size of the interleaver, takes the value of {2,3,6}, and is indicated by a high-level parameter CORESET-interleaver-size. n is_shiftIndicating a shift value, n when CORESET is configured by a Physical Broadcast Channel (PBCH) or a System Information Block (SIB) 1_shiftGreater than or equal to a physical cell ID; n is_shiftWhen the high-level parameter CORESET-shift-index indicates, the value range is 0-274. C is an integer.

Illustratively, see fig. 5b, which is an exemplary diagram of an interleaving map. In fig. 5b, L ═ 2,

n

_shift0, R is 3, then

C8, from

One can get i ∈ {0, 1., 23}, i.e. the CORESET includes 24 REG bundles, numbered 0,1, …,23, 1 REG bundle includes 2 REGs, 1 CCE consists of 6 REGs, the CORESET includes 8 CCEs, numbered 0,1 …, 7. The interleaver expression according to the interleaving map can be given in table 3.

TABLE 3

r	c	j＝c×R+r	f(j)
				0	0	0	f(0)＝0
1	0	1	f(1)＝(8)mod24＝8
				2	0	2	f(2)＝(2×8)mod24＝16
0	1	3	f(3)＝(1)mod24＝1
				1	1	4	f(4)＝(1×8+1)mod24＝9
2	1	5	f(5)＝(2×8+1)mod24＝17
				…	…	…	…

According to table 3, the interleaving expression of the interleaving mapping and the REG bundle row and column access in fig. 5b can be obtained, for example, CCE 0 is composed of REG bundle sets { f (0), f (1), f (2) }, and the values are 0,8, 16; the 1 REG bundle includes two OFDM symbols in the time domain and one RB in the frequency domain, so f (0) is mapped to REG0 and REG1, f (1) is mapped to REG 16 and REG 17, f (2) is mapped to REG 32 and REG 33, and then CCE 0 consists of REG0, REG1, REG 16, REG 17, REG 32, and REG 33. As another example, CCE 1 consists of REG 2, REG 3, REG 18, REG 19, REG 34, and REG 35.

slot scheduling (also referred to as Type (Type) a), refers to that a starting symbol position of a Physical Downlink Shared Channel (PDSCH) scheduled by a PDCCH may be {0,1,2,3}, and the PDCCH may be located in one or more OFDM symbols in the first 3 OFDM symbols of one slot. The slot scheduling means that the PDCCH and the PDSCH scheduled by the PDCCH are located in the same slot. The cross-slot scheduling means that the PDCCH can schedule the PDSCH across slots, the PDCCH is located in a slot different from the PDSCH scheduled by the PDCCH, and the slot for transmitting the PDCCH is earlier than the slot for transmitting the PDSCH. mini-slot scheduling, which may also be referred to as Type (Type) B, refers to that the starting symbol position of PDSCH scheduled by PDCCH may be {0, …,12}, PDCCH may be located in any symbol within the slot, but the symbol occupied by PDCCH precedes the symbol occupied by PDSCH scheduled by that PDCCH.

For the PDCCH corresponding to 15kHz, 30kHz, 60kHz or 120kHz SCS, the PDCCH in the slot scheduling may be located in the first 3 OFDM symbols of one slot, that is, the PDCCH is mapped on the first 3 OFDM symbols of one slot, the mapped PDCCH may schedule the PDSCH, and the scheduled PDSCH and the PDCCH are in the same slot. For a PDCCH corresponding to 15kHz SCS, a PDCCH other than the first 3 OFDM symbols may schedule a PDSCH across slots, where the scheduled PDSCH and the PDCCH are in different slots, and the slot transmitted by the PDCCH is earlier than the slot transmitted by the PDSCH. The PDCCH located at any OFDM symbol may schedule the PDSCH in a micro-slot (mini-slot).

The mini-slot includes two or more OFDM symbols, but the number of OFDM symbols included in the mini-slot is smaller than the number of OFDM symbols included in the slot, for example, the slot includes 14 OFDM symbols, and the mini-slot includes 7 OFDM symbols. The PDCCH scheduling PDSCH may also be described as DCI scheduling PDSCH, or control information scheduling PDSCH, etc.

The starting symbol position and time domain length of the slot scheduled, mini-slot scheduled PDSCH can be seen in table 4.

TABLE 4

Note 1 in table 4: only when DL-DMRS-typeA-pos is 3, S is 3, meaning that the starting symbol position of slot scheduling (typeA) can be equal to 3 only if the position of DMRS is at symbol 3. As can be seen from table 4, for slot scheduling and mini-slot scheduling, the sum of the starting symbol position and the time domain length does not exceed the number of symbols included in one slot.

With the development of communication technology, resources can be shared between different communication systems, for example, an LTE system and an NR system can share spectrum resources. In the spectrum resource shared by the LTE system and the NR system, in order to support normal communication of the LTE system, the NR system cannot use a resource used by a specific signal or a specific channel of the LTE system while using a resource not used by the LTE system. For example, NR systems cannot use CRS of LTE and/or resources to which PDCCH of LTE is mapped in shared spectrum resources. That is, in shared spectrum resources, NR needs to perform rate matching on resources to which a particular signal of LTE is to be mapped. In the embodiment of the present application, rate matching is performed on a resource to which a CRS of LTE is to be mapped by using an NR PDCCH as an example.

The LTE system supports SCS at 15 kHz. To support various traffic needs and/or application scenarios, NR systems may support multiple types of subcarrier spacing, e.g., 15kHz, 30kHz, 60kHz, 120kHz, etc. When the LTE system and the NR system share spectrum resources, the LTE system and the NR system may use either the same subcarrier spacing or different subcarrier spacings.

When the NR system performs rate matching on resources to which CRS of the LTE is to be mapped, if both the LTE system and the NR system use time-frequency resources of 15kHz, the NR system does not map PDSCH on REs for mapping CRS of the LTE in shared spectrum resources. For example, in the shared spectrum resources, the NR PDSCH corresponding to the SCS of 15kHz is not mapped to the RE for carrying the CRS of LTE, so that the NR PDSCH corresponding to the SCS of 15kHz does not interfere with the CRS of LTE, and the NR PDSCH corresponding to the SCS of 15kHz can fully utilize the unused time-frequency resources of the CRS of LTE, thereby improving the utilization rate of the shared resources. The resources to which the CRS of the LTE is mapped may also be described as: the resource mapping method comprises the steps of mapping resources of CRS of LTE, resources to be occupied by CRS of LTE, candidate resources of CRS of LTE or resources corresponding to CRS of LTE and the like.

However, if the SCS employed by the NR system is different from the SCS employed by the LTE system, when the NR system performs rate matching on the resources corresponding to the CRS of the LTE, mutual interference between the NR PDSCH and the CRS of the LTE may not be avoided. For example, the SCS adopted by the NR system is 30kHz, and the SCS adopted by the LTE system is 15kHz, which is described with reference to fig. 6(a) and 6 (B). The resource grid shown in fig. 6(a) employs SCS of 15kHz for the LTE system, and the resource grid shown in fig. 6(B) employs SCS of 30kHz for the NR system. The bandwidth of the resource grid shown in fig. 6(a) is 15kHz × 24 — 360kHz, and the time length is one slot, that is, 1 ms. The bandwidth of the resource grid shown in fig. 6(B) is 30kHz × 12 — 360kHz, and the time length is 2 slots, that is, 1 ms. Then, the resource grid shown in fig. 6(a) and the resource grid shown in fig. 6(B) are for the same time-frequency resource, and the bandwidth of the time-frequency resource is 360kHz and the time length is 1 ms. In fig. 6(a), black squares indicate the positions of REs carrying CRS of LTE. In fig. 6(B), black squares indicate positions where REs of NR PDSCH are not mapped. It can be seen that, when the NR PDSCH is transmitted on the resource grid shown in fig. 6(B), the NR PDSCH is rate-matched on REs corresponding to LTE CRS. In the same time-frequency resource, there is an overlapping portion between the rate-matched REs of the NR PDSCH and the corresponding REs of the LTE CRS.

Fig. 6(a) shows a resource grid including 14 OFDM symbols from 1 st to 14 th. Fig. 7(a) is a schematic diagram of a frequency spectrum of CRS of LTE on the 5 th OFDM symbol in the resource grid shown in fig. 6(a), bold arrows in fig. 7(a) indicate subcarriers used for carrying the LTE CRS, dotted lines indicate subcarriers not used for carrying the LTE CRS, and an interval between adjacent subcarriers is 15 kHz. Fig. 6(B) shows a resource grid including 28 OFDM symbols from 1 st to 28 th. Fig. 7(B) is a schematic diagram of a frequency spectrum on the 9 th or 10 th OFDM symbol in the resource grid shown in fig. 6 (B). The solid-line unidirectional arrows in fig. 7(B) indicate subcarriers that can carry NR PDSCH, the dashed-line unidirectional arrows indicate subcarriers that cannot carry NR PDSCH (for rate matching), and the interval between adjacent subcarriers is 30 kHz. The bold double-headed arrows in fig. 7(B) are used to describe interference that the signal of the NR PDSCH may cause to the LTE CRS at the subcarrier position for carrying the LTE CRS on the 5 th time domain symbol shown in fig. 6(a) or on the 9 th or 10 th time domain symbol shown in fig. 6 (B).

Fig. 7(B) includes 12 30kHz subcarriers from subcarrier #0 to subcarrier # 11. As can be seen from fig. 7(B), the signal energy of the 30kHz subcarrier #2 is non-zero at the position of the 15kHz subcarrier #3 (at the LTE CRS position), and the signal energy of the 30kHz subcarrier #3 is non-zero at the position of the 15kHz subcarrier #3, so that the 30kHz subcarrier #2 is not orthogonal to the 15kHz subcarrier #3, and the 30kHz subcarrier #3 is not orthogonal to the 15kHz subcarrier # 3. That is, LTE CRS on subcarrier #3 at 15kHz may be interfered by NR PDSCH; LTE CRS on subcarrier #3 at 15kHz may also interfere with NR PDSCH.

It can be seen that in a scenario where the LTE system and the NR system share spectrum resources but use different SCS, the NR PDSCH and the LTE CRS may interfere with each other because part of the subcarriers of one SCS are not orthogonal to part of the subcarriers of the other SCS. Further, the NR PDCCH and the LTE CRS may also interfere with each other.

When the LTE CRS is transmitted through 4 antenna ports, the indexes (numbered from 0) of the OFDM symbols occupied by the LTE CRS on the time-frequency resources of 15kHz SCS are #0, #1, #4, #7, #8, and #11, and the indexes (numbered from 0) of the OFDM symbols occupied by mapping the LTE CRS onto the time-frequency resources of 30kHz SCS may be #0, #1, #2, #3, #8, and #9, which results in that the PDCCH scheduled by the NR system slot cannot be transmitted on the time-frequency resources of 30kHz SCS because DCI does not support rate matching.

In view of the fact that under the scenario that the LTE system and the NR system share spectrum resources but use different SCS, the NR PDCCH and the LTE CRS interfere with each other, embodiments of the present application provide a method and an apparatus for transmitting control information, which can reduce transmission interference between the NR PDCCH and the LTE CRS. Further, in a scenario where two communication systems supporting different SCS are deployed in a common frequency band, the embodiment of the present application may reduce transmission interference between the two communication systems. The scenario of co-frequency band deployment of two communication systems supporting different SCS includes, but is not limited to: the method comprises the following steps of deploying the NR system and the LTE system in a common frequency band, deploying the two NR networks in the common frequency band, deploying the LTE system or the NR system and the future communication system in the common frequency band, and the like.

Please refer to fig. 8, which is a schematic diagram of a network architecture to which the embodiment of the present application is applied, where the network architecture includes a network device and a terminal, and the number and the form of the network device and the terminal shown in fig. 8 do not constitute a limitation of the embodiment of the present application, for example, in practical applications, the network architecture includes a plurality of network devices and a plurality of terminals.

In this application, the network device may be any device having a wireless transceiving function. Including but not limited to: an evolved Node B (NodeB) or eNB or e-NodeB in LTE, a base station (gbnodeb or gNB) or a transmission point (TRP) in NR, a base station for subsequent evolution in 3GPP, an access Node in a wireless fidelity (WiFi) system, a wireless relay Node, a wireless backhaul Node, and the like. The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, or balloon stations, etc. Multiple base stations may support the same technology network as mentioned above, or different technologies networks as mentioned above. The base station may contain one or more co-sited or non co-sited TRPs. The network device may also be a radio controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a server, a wearable device, or a vehicle mounted device, etc. The following description will take a network device as an example of a base station. The multiple network devices may be base stations of the same type or different types. The base station may communicate with the terminal, or may communicate with the terminal through the relay station. The terminal may communicate with multiple base stations of different technologies, for example, the terminal may communicate with a base station supporting an LTE network, may communicate with a base station supporting a 5G network, and may support dual connectivity with the base station of the LTE network and the base station of the 5G network.

The terminal is a device with a wireless transceiving function, can be deployed on land, and comprises an indoor or outdoor terminal, a handheld terminal, a wearable terminal or a vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wearable terminal device, and so on. The embodiments of the present application do not limit the application scenarios. A terminal may also be referred to as a terminal device, User Equipment (UE), access terminal device, in-vehicle terminal, industrial control terminal, UE unit, UE station, mobile station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, or UE device, among others. The terminals may also be fixed or mobile.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

The following describes a control information transmission method provided in an embodiment of the present application based on a network architecture shown in fig. 8 with reference to the accompanying drawings. It should be noted that, in the description process, names of information or data interacted between the terminal and the network device are used for example, and do not form a limitation to the embodiment of the present application.

Please refer to fig. 9, which is a schematic flowchart of a control information transmission method according to an embodiment of the present application, where the flowchart may include, but is not limited to, the following steps:

step 101a, a network device sends control information to a terminal on a first CCE. Accordingly, in step 101b, the terminal receives the control information from the network device on the first CCE.

Step 102a, the network device transmits the control information to the terminal on one or more second CCEs. Accordingly, the terminal receives the control information from the network device on one or more second CCEs, step 102 b.

The embodiment of the present application does not limit the order of executing steps at each end, for example, for a network device, step 101a and step 102a may be executed simultaneously, or step 101a may be executed first and step 102a may be executed second, or step 102a may be executed first and step 101a may be executed second. For another example, for the terminal, step 101b and step 102b may be executed simultaneously, or step 101b may be executed first and then step 102b may be executed, or step 102b may be executed first and then step 101b may be executed. For the interactive process, the terminal may perform step 101b and step 102b after the network device performs step 101a and step 102 a; the terminal may also execute step 101b after the network device executes step 101a, and execute step 102b after the network device executes step 102 a.

The control information may be various types of control information transmitted by the network device to the terminal, and may be information such as DCI. The control information may be control information in an NR system, or control information in a future communication system. The control information is transmitted through PDCCH or CCE, which is the minimum resource unit for PDCCH transmission. The PDCCH corresponds to a different SCS than the reference signal, for example, the PDCCH is an NR PDCCH corresponding to a 30kHz SCS in an NR system, and the reference signal is an LTE CRS corresponding to a 15kHz SCS in an LTE system; for another example, the PDCCH is an NR PDCCH corresponding to 30kHz SCS in the NR system, and the reference signal is an NR CRS corresponding to 15kHz SCS in the NR system. In the embodiment of the present application, the PDCCH is described with an NR PDCCH corresponding to a 30kHz SCS in an NR system, and the reference signal is described with an LTE CRS corresponding to a 15kHz SCS in an LTE system as an example. The PDCCH corresponds to a different SCS from the reference signal, and it can also be described that the SCS corresponding to the time-frequency resource occupied by the control information is different from the SCS corresponding to the time-frequency resource occupied by the reference signal.

The number of CCEs included in one PDCCH is related to an aggregation level. In one possible implementation, one PDCCH includes a number of CCEs equal to the aggregation level. For aggregation levels greater than 1, its aggregated CCEs comprise one first CCE and one or more second CCEs, where the number of the one or more second CCEs is equal to the aggregation level minus 1. The number of the first CCE is one by default, and the number of the one or more second CCEs is related to an aggregation level. The aggregation level is 2, and then includes a second CCE that transmits the same control information as the first CCE. An aggregation level of 4, then includes three second CCEs, which transmit the same control information as the first CCE. And so on the number of second CCEs at other aggregation levels.

The first CCE and the one or more second CCEs are included in a CORESET, which includes N CCEs, and a specific value of N may be determined by CORESET configuration information. The numbering of the N CCEs meets the numbering rule of the time domain first and the frequency domain later. Unlike the CCE numbering rules in fig. 5a and 5b, the CCE numbering rules in fig. 5a and 5b are frequency domain numbering, and according to the CCE numbering rules in fig. 5a and 5b, inter-subcarrier interference between the NR PDCCH corresponding to 30kHz SCS and the LTE CRS corresponding to 15kHz SCS cannot be avoided by any means. In the embodiment of the application, the numbering of the CCEs is performed by adopting a numbering rule of a time domain first and a frequency domain later, and meanwhile, the same control information is transmitted on the first CCE and the one or more second CCEs, so that no subcarrier interference exists between an NR PDCCH corresponding to 30kHz SCS and an LTE CRS corresponding to 15kHz SCS.

Further, the CORESET includes M REGs, and the specific value of M may be determined by CORESET configuration information. The numbering of the M REGs satisfies the frequency domain first then time domain numbering rule. Unlike the numbering rule of REGs in fig. 5a and 5b, the numbering rule of REGs in fig. 5a and 5b is time domain first and then frequency domain. In the embodiment of the application, the numbering of the CCEs adopts a numbering rule of a first time domain and a second frequency domain, the numbering of the REGs adopts a numbering rule of a first frequency domain and a second time domain, and meanwhile, the first CCE and one or more second CCEs transmit the same control information, so that the subcarrier interference between an NR PDCCH corresponding to 30kHz SCS and an LTE CRS corresponding to 15kHz SCS can be reduced. For example, if one CCE includes 6 REGs, the relationship between M and N is M ═ 6 × N.

It can be understood that the CCE numbering rule and the REG numbering rule adopted in the embodiments of the present application are the basis for avoiding interference in implementing time-domain repeated transmission.

The CCE numbering may be a numbering rule of time domain first and frequency domain second, or the CCE numbering rule of time domain first and frequency domain second and the REG numbering rule of frequency domain first and time domain second, which may be predefined, or may be configured to the terminal through signaling (e.g., Radio Resource Control (RRC) signaling). The time domain-to-frequency domain numbering rule can also be described as a time domain-first numbering rule or a time domain-frequency domain numbering rule. The numbering rule of the frequency domain first and the time domain second can also be described as a frequency domain-first numbering rule or a frequency domain-time domain numbering rule and the like.

The network device may transmit control information to the terminal on resources of the first CCE and transmit the control information to the terminal on resources of the one or more second CCEs. The terminal may receive the control information from the network device on resources of the first CCE and the control information from the network device on resources of the one or more second CCEs. The resources of the first CCE may include one or more of time-frequency resources, code domain resources, or space domain resources, and the resources of the second CCE may include one or more of time-frequency resources, code domain resources, or space domain resources. In the embodiment of the application, the description is given by taking an example that the resource of the first CCE includes a time-frequency resource, and the resource of the second CCE includes a time-frequency resource.

Before receiving the control information, the terminal determines the time-frequency resources of the N CCEs included in the CORESET according to the CORESET configuration information and the two numbering rules (the numbering of the CCEs adopts the numbering rule of the first time domain and the second frequency domain, and the numbering of the REGs adopts the numbering rule of the first frequency domain and the second time domain). The network device sends the CORESET configuration information to the terminal, so that the terminal can determine the time-frequency resources of the CCEs included in the CORESET, and how and when to send the CORESET configuration information are not limited in the embodiment of the present application.

For example, the CORESET configuration information may be as follows:

in the CORESET configuration information, the controlResourceSetId is used to configure CORESET Identity (ID), i.e., ID used to configure the PDCCH resource set. frequency Domain resources are used for configuring the frequency domain size of CORESET

And the position, the configured granularity is 6 RBs, namely the 6 RBs are used as the configuration unit of the CORESET frequency domain. duration is used for configuring the time domain size of CORESET

The cci-REG-MappingType is used for configuring the mapping type of CCE-REG: non-interleaved (nonInterleaved) or interleaved (interlaced). If the mapping is interleaving mapping, REG-bundle size is used for configuring the interleaving granularity of the REG, namely the size (L) of the REG bundle; interleaver size is used to configure the number of rows (R) of the interleaver; ShiftIndex is used to configure the REG bundle offset (n) of the interleaver_shift). The non-interleaved mapping may also be referred to as localized mapping.

Wherein the content of the first and second substances,

the number of symbols configured in the time domain, specifically, the number of OFDM symbols configured in the time frequency, may be configured to be 1,2 or 4, that is

The size of REG bundle can be configured to be 1,2,3 or 6, i.e., L ∈ {1,2,3,6 }.

If the mapping type configured by the cci-REG-MappingType is a non-interleaving mapping, the interleaver may be denoted as f (j) ═ j, and the interleaver is used to represent the mapping relationship. For example, reference may be made to fig. 10a, which is an exemplary diagram of a non-interleaving map provided in an embodiment of the present application. In fig. 10a, L ═ 2,

then

By

We can obtain i ∈ {0, 1., 23}, i.e. it includes 24 REG bundles, the

number

0,1, …,23, 1 REG bundle includes 2 REGs, and the numbers of the 24 REG bundles and the 48 REGs both adopt the numbering rule of frequency domain first and time domain later. 1 CCE includes 6 REGs, the CORESET includes 8 CCEs, the number is 0,1 …,7, and the number of the 8 CCEs adopts the numbering rule of first time domain and then frequency domain. In fig. 10a, the rows represent the frequency domain and the columns represent the time domain. CCE 0 includes 1 OFDM symbol in time domainNumber, 6 RBs, i.e., 6 REGs of REG0, REG1, REG 2, REG 3, REG 4, and REG5, are included in the frequency domain. CCE 1 includes 1 OFDM symbol in the time domain and 6 RBs in the frequency domain, i.e., 6 REGs of REG 24, REG 25, REG 26, REG 27, REG 28, and REG 29. It is to be understood that one CCE in fig. 10a includes 1 OFDM symbol in the time domain and 6 RBs in the frequency domain, whereas one CCE in fig. 5a includes two OFDM symbols in the time domain and 3 RBs in the frequency domain.

If the mapping type configured by the cci-REG-MappingType is an interleaving mapping, the interleaver can be represented by the following formula.

j＝c×R+r+n×C×R

r＝0,1,...,R-1

c＝0,1,...,C-1

For example, see fig. 10b, which is an exemplary diagram of an interleaving map provided in the embodiment of the present application. In fig. 10b, L ═ 2,

n

_shift0, R is 3, then

C is 48/(2 × 3 × 2) 4. By

One may obtain i ∈ {0, 1., 23}, i.e. it includes 24 REG bundles, and the

number

0,1, …,23, 1 REG bundle includes 2 REGs, and the numbers of the 24 REG bundles and the 48 REGs are all the first frequencyAnd numbering rules of the time domain after the domain. 1 CCE includes 6 REGs, then the CORESET includes 8 CCEs numbered 0,1 …, 7. The numbering of the 8 CCEs adopts a numbering rule of firstly numbering the time domain and then numbering the frequency domain. In fig. 10b, the rows represent the frequency domain and the columns represent the time domain. The interleaver expression according to the interleaving map can be given in table 5.

TABLE 5

r	c	j＝c×R+r+n×C×R	n	f(j)
					0	0	0	0	f(0)＝0
1	0	1	0	f(1)＝1*4＝4
					2	0	2	0	f(2)＝2*4＝8
0	1	3	0	f(3)＝1
					1	1	4	0	f(4)＝1*4+1＝5
2	1	5	0	f(5)＝2*4+1＝9
					…	…	…	…	…
0	0	12	1	f(12)＝0+12＝12
					1	0	13	1	f(13)＝1*4+12＝16
2	0	14	1	f(14)＝2*4+12＝20
					0	1	15	1	f(15)＝1+12＝13
1	1	16	1	f(16)＝1*4+1+12＝17
					2	1	17	1	f(17)＝2*4+1+12＝21
…	…	…	…	…

According to table 5, the interleaving expression of the interleaving mapping and the row and column access of REG bundle in fig. 10b can be obtained, for example, CCE 0 is composed of REG bundle sets { f (0), f (1), f (2) }, and the values are 0,4, and 8; 1 REG bundle includes one OFDM symbol in the time domain and two RBs in the frequency domain, so f (0) is mapped to REG0 and REG1, f (1) is mapped to REG 8 and REG 9, f (2) is mapped to REG 16 and REG 17, then CCE 0 consists of REG0, REG1, REG 8, REG 9, REG 16 and REG 17. For another example, CCE 1 consists of REG bundle sets { f (12), f (13), f (14) }, and has values of 12,16, and 17; 1 REG bundle includes one OFDM symbol in the time domain and two RBs in the frequency domain, so f (12) maps to REG 24 and REG 25, f (13) maps to REG 32 and REG 33, f (14) maps to REG 40 and REG 41, then CCE 1 consists of REG 24, REG 25, REG 32, REG 33, REG 40 and REG 41.

In fig. 10b, the rule of CCE numbering is time domain first and then frequency domain, and the interleaving sub-array of symbol 0 represents the interleaving sub-arrays corresponding to CCE 0, CCE 2, CCE 4 and CCE 6, and the interleaving sub-array of symbol 1 represents the interleaving sub-arrays corresponding to CCE 1, CCE 3, CCE 5 and CCE 7. Symbol 0 and symbol 1 may be OFDM symbols or DFT-S-OFDM symbols, etc.

As can be seen from fig. 10a and 10b, CCE 0 corresponds to OFDM symbols different in the time domain from CCE 1 and corresponds to the same RB in the frequency domain.

Under the condition that the time-frequency resource of the CORESET is determined, the network equipment can send control information on the time-frequency resource of the CCE included in the CORESET according to the aggregation level. Correspondingly, the terminal may perform blind detection on the PDCCH on the time-frequency resource of the CCE included in the CORESET according to the aggregation level to receive the control information.

The network device can select a proper aggregation level AL on the time-frequency resource of the CCE included in the CORESET according to the signal-to-noise ratio of the terminal, and send control information on the AL CCEs. Correspondingly, the terminal may perform blind detection on the PDCCH on the time-frequency resources of the CCE included in the CORESET to receive the control information.

In one possible implementation, the network device transmits AL control information on AL CCEs (one control information on each CCE), and the terminal receives AL/2 control information on AL/2 CCEs (one control information on each CCE). For example, AL is 2, the network device transmits one piece of control information on CCE 0, transmits the control information on CCE 1, that is, repeatedly transmits the control information on CCE 0 and CCE 1, and the terminal blindly detects the PDCCH on CCE 0 or CCE 1 to receive the control information. If the terminal blindly detects the PDCCH on CCE 0, the information carried on CCE 1 may be considered transparent to the terminal. If the terminal blindly detects the PDCCH on CCE 1, the information carried on CCE 0 may be considered transparent to the terminal. In this example, the terminal blindly detects a PDCCH with AL equal to 1, but the network device transmits a PDCCH with AL equal to 2, which can avoid interference of the NR PDCCH with the LTE CRS.

In fig. 10a and 10b, AL is 2, the network device transmits two control information on two CCEs, and the terminal receives one control information on 1 CCE. The network equipment respectively transmits control information 1 on CCE 0 and CCE 1, and the terminal 1 receives the control information 1 on the CCE 0 or the CCE 1; the network equipment respectively transmits control information 2 on CCE 2 and CCE 3, and the terminal 2 receives the control information 2 on the CCE 2 or the CCE 3; the network equipment respectively transmits control information 2 on CCE 4 and CCE 5, and the terminal 3 receives the control information 3 on the CCE 4 or the CCE 5; the network device transmits control information 4 on CCE 6 and CCE 7, respectively, and terminal 4 receives control information 4 on CCE 6 or CCE 7.

In another possible implementation manner, the network device transmits AL pieces of control information on AL CCEs, and the terminal receives AL pieces of control information on AL CCEs. For example, AL is 2, the network device repeatedly transmits control information on CCE 0 and CCE 1, and the terminal blindly detects PDCCH on CCE 0 and CCE 1 to receive two identical control information.

In fig. 10a and 10b, AL is 2, the network device transmits two control information on two CCEs, and the terminal receives two control information on two CCEs. The network equipment respectively transmits control information 1 on CCE 0 and CCE 1, and the terminal 1 respectively receives the control information 1 on CCE 0 and CCE 1; the network equipment respectively transmits control information 2 on CCE 2 and CCE 3, and the terminal 2 respectively receives the control information 2 on CCE 2 and CCE 3; the network equipment respectively transmits control information 2 on CCE 4 and CCE 5, and the terminal 3 respectively receives the control information 3 on CCE 4 and CCE 5; the network device transmits control information 4 on CCE 6 and CCE 7, respectively, and terminal 4 receives control information 4 on CCE 6 and CCE 7, respectively.

In the embodiment of the present application, the number of CCEs for the network device to transmit the control information is greater than or equal to 2, and the number of CCEs for the terminal to receive the control information is greater than or equal to 1.

The CCE numbering adopts a time domain first and frequency domain second numbering rule, the REG numbering adopts a frequency domain first and time domain second numbering rule, and the aggregated CCE is loadedCarrying the same control information. For example, AL is 2, control information 1 is carried on CCE 0, and control information 1 is carried on CCE 1; for another example, AL is 4, CCE 0 carries control information 1, CCE 1 carries control information 1, CCE 2 carries control information 1, and CCE 3 carries control information 1. In conjunction with fig. 10a and 10b, CCE 0 corresponds to symbol 0 in the time domain, CCE 1 corresponds to symbol 1 in the time domain, CCE 0 and CCE 1 carry the same control information, and then symbol 0 carries the same control information as symbol 1. It is understood that the control information transmitted on symbol 0 and symbol 1 is repeated, or is described as being repeatedly transmitted on symbol 0 and symbol 1, and the repeated transmission is a repeated transmission on the time domain. Further, the control information may be repeatedly transmitted over 4 symbols. Further, the control information may be at 2ⁿThe transmission is repeated on one OFDM symbol, and n is a positive integer.

In the embodiment shown in fig. 9, the CCE numbering adopts a numbering rule of time domain first and frequency domain second, and the REG numbering adopts a numbering rule of frequency domain first and time domain second, so that the same control information is transmitted over the first CCE and one or more second CCEs, thereby implementing that the control information is transmitted over 2ⁿThe transmission is repeated over one symbol. Control information is in 2ⁿThe repeated transmission on each symbol, i.e. the control information is repeated in the time domain, corresponds to the control information being interpolated by 0 in the frequency domain. Since the control information is in 2ⁿRepeat transmission over one symbol, 2ⁿOne symbol is aligned with another symbol in the time domain, so that in the scenario of sharing spectrum resources but using different SCS, transmission interference between control information and a signal carried by another symbol can be reduced, for example, transmission interference between NR PDCCH and LTE CRS can be reduced.

2 for repeatedly transmitting control information in the embodiment of the applicationⁿA symbol is called 2ⁿA first OFDM symbol, these 2ⁿThe first OFDM symbols are aligned in time domain with a second OFDM symbol, which is an OFDM symbol for carrying another signal with a different SCS from the SCS corresponding to the control information. For example, the control information is NR DCI, and the second OFDM symbol is an OFDM symbol for carrying LTE CRS. 2ⁿA first OFDM symbol and a second OFDM symbol in time domainAlignment, means 2ⁿThe first OFDM symbol shares the same time domain resources as the second OFDM symbol.

Therein, 2ⁿIs a multiple between the first SCS and the second SCS, i.e. the first SCS is 2 of the second SCSⁿAnd (4) doubling. The first SCS is a subcarrier interval corresponding to a time-frequency resource of the control information or understood as a subcarrier interval of the PDCCH; the second SCS is a subcarrier spacing corresponding to a time-frequency resource of another signal. For example, the first SCS is 30kHz and the second SCS is 15kHz, then the control information may be repeatedly transmitted over 2 first OFDM symbols, which are aligned in the time domain with one second OFDM symbol, which is used to carry LTE CRS; for another example, the first SCS is 60kHz and the second SCS is 15kz, then the control information may be repeatedly transmitted over 4 first OFDM symbols, which are aligned in the time domain with one second OFDM symbol, which is used to carry LTE CRS.

As illustrated in connection with fig. 6(a) and 6(B), the subcarrier spacing in the resource grid shown in fig. 6(a) is 15 kHz; the subcarrier spacing in fig. 6(B) is 30 kHz. The resource grids shown in fig. 6(a) and fig. 6(B) are for the same time-frequency resource, and the bandwidth of the time-frequency resource is 360kHz (i.e. 15kHz × 24 or 30kHz × 12), and the time length is 1 ms. As can be seen from fig. 6(a) and 6(B), the first OFDM symbol in the resource grid shown in fig. 6(a) is aligned with the first OFDM symbol and the second OFDM symbol in the resource grid shown in fig. 6(B) in the time domain, and so on, and the fourteenth OFDM symbol in the resource grid shown in fig. 6(a) is aligned with the twenty-seventh OFDM symbol and the twenty-eighth OFDM symbol in the resource grid shown in fig. 6(B) in the time domain, i.e., one second OFDM symbol in fig. 6(a) is aligned with the two first OFDM symbols in fig. 6(B) in the time domain.

Control information is in 2ⁿImplementations of the repeated transmission on the first OFDM symbol may include, but are not limited to, the following two ways:

when n is 1, the control information is repeatedly transmitted on two first OFDM symbols, the first OFDM symbol includes a cyclic prefix, and the second OFDM symbol includes a cyclic suffix. .

Illustratively, when n is 1, the control information is repeatedly transmitted over two first OFDM symbols, the first OFDM symbol including a cyclic prefix and the second OFDM symbol including a cyclic suffix. It is also understood that the first OFDM symbol includes a desired signal and a cyclic prefix, and the second first OFDM symbol includes a desired signal and a cyclic suffix, and the desired signal is a time domain signal of the control information.

Referring to fig. 11, an exemplary diagram of cyclic prefix and cyclic suffix provided in the embodiments of the present application is illustrated, where the first SCS is 30kHz and the second SCS is 15 kHz. In fig. 11, the cyclic prefix in the first OFDM symbol includes 953-1024 samples, and the useful signal in the first OFDM symbol includes 1-1024 samples; the cyclic suffix in the second first OFDM symbol comprises 1-72 sampling points, and the useful signal in the second first OFDM symbol comprises 1-1024 sampling points; the cyclic prefix in the second OFDM symbol comprises 1905 to 2048 sampling points, and the useful signal in the second OFDM symbol comprises 1 to 2048 sampling points. As can be seen from FIG. 11, the last 2048 sampling points of the two first OFDM symbols comprise 2 identical sampling points of No. 1-1024, and the last 2048 sampling points of the two first OFDM symbols are aligned with the useful signal (2048 sampling points of No. 1-2048) after the cyclic prefix removal (144 sampling points of No. 1905-2048) of the second OFDM symbol in the time domain. Namely, when the first two 30kHz OFDM symbols perform Fast Fourier Transform (FFT) at 15kHz, after removing the cyclic prefix of 144 sampling points, sampling points 1 to 1024 are repeated in the time domain for 2 times under the sampling window of 2048 sampling points. This avoids transmission interference between the control information at 30kHz and the LTE CRS at 15 kHz.

If the two first OFDM symbols both include cyclic prefixes (953-1024 and 72 sampling points), and useful signals (1-1024 and 1024 sampling points), when the two first OFDM symbols are FFT-processed at 15kHz, after the cyclic prefixes of 144 sampling points are removed, the sampling points 1-1024 cannot be repeated for 2 times in the time domain due to the cyclic prefix of the second first OFDM symbol under the sampling window of 2048 sampling points. This results in transmission interference between the control information at 30kHz and the LTE CRS at 15 kHz.

The first method is applicable to the scenario where n is 1, the network device repeatedly transmits control information on two first OFDM symbols, and the terminal repeatedly receives control information on the two first OFDM symbols. For the scene with n >1, the mode two is adopted.

Mode two, in 2ⁿIn the first OFDM symbol, the control information transmitted on the ith first OFDM symbol is obtained after the phase rotation processing of the corresponding frequency domain signal, i is more than 1 and less than or equal to 2ⁿIs an integer of (1). An input signal of an Inverse Fast Fourier Transform (IFFT) on the ith first OFDM symbol is a_1,k*e^j ^*ω，a_1,kRepresenting the frequency domain signal at the kth subcarrier interval on the 1 st first OFDM symbol; ω represents the phase size to be rotated when the phase rotation processing of the frequency domain signal is required. It will be appreciated that in 2ⁿIn the first OFDM symbols, the control information transmitted on each first OFDM symbol except for the first OFDM symbol is obtained after the phase rotation processing is performed on the corresponding frequency domain signal.

Please refer to fig. 12, which is an exemplary diagram of repeatedly transmitting control information according to an embodiment of the present application, and is an example of repeatedly transmitting control information on 2 first OFDM symbols. For example, the first SCS is 30kHz, and the frequency domain resource for transmitting control information on the first OFDM symbol includes a shared bandwidth. In the shared bandwidth, the data mapped on the first OFDM symbol and the second first OFDM symbol are the same on the same subcarrier, and are respectively a_1,nTo a_1,n+k. Wherein, a_1,nTo a_1,n+kThe values of different data may be the same or different for complex signals, and the embodiments of the present application are not limited. For a on the second first OFDM symbol_1,nTo a_1,n+kThe respective phase rotations can be performed. Alternatively, as shown in fig. 12, when the frequency domain resource for transmitting the control information on the first OFDM symbol includes the unshared bandwidth, in the unshared bandwidth, the respective data is mapped on the same subcarrier, the first OFDM symbol and the second first OFDM symbol.

It can be understood thatSaid 2 on the same sub-carrier in the shared bandwidthⁿThe frequency domain signals corresponding to the first OFDM symbols are the same.

Optionally, the specific implementation manner of the phase rotation processing is as follows: the frequency domain signal is multiplied by a phase rotation factor. The phase rotation factor is used to indicate the phase of the frequency domain signal rotation.

Optionally, during the phase rotation process, the phase of the frequency domain signal rotation corresponding to the ith first OFDM symbol is proportional to i-1.

It can be understood that, after performing the phase rotation process on the frequency domain signal on the first OFDM symbol, the time domain signal (i.e. the useful signal) of the first OFDM symbol may be cyclically shifted.

In the digital domain, k for index or number₁The phase rotation factor corresponding to the ith first OFDM symbol is:

wherein the CP length on the ith first OFDM symbol

The rotation phase corresponding to the ith first OFDM symbol is:

for example, the phase rotation factor corresponding to the second first OFDM symbol (i.e., i ═ 2) is:

k in the phase rotation factor₁Is a subcarrier index, corresponding to n + k in the phase rotation factor of the second first OFDM symbol in fig. 12.

In the analog domain, for a subcarrier with index or number k, the phase rotation factor corresponding to the ith first OFDM symbol is:

i.e. the rotated phase corresponding to the ith first OFDM symbol

Wherein

Where N is the number of FFT points,

the number of subcarriers included for one RB.

The CP length of symbol i, which is the subcarrier spacing μ, is given in units of the number of sample points. Δ f is the size of the subcarrier spacing μ. T is_c1/(480 × 1000 × 4096). j is an imaginary unit, and the square of j is equal to-1. And pi is the circumferential ratio.

The number of RBs included in a carrier having a subcarrier spacing μ indicating Radio Resource Control (RRC) signaling configuration, and x indicates uplink or downlink.

The number of RBs whose RB numbers of the carriers at which the subcarrier spacing of the RRC signaling configuration is μ are offset from one reference point. Mu.s₀Represents a maximum subcarrier spacing of the one or more subcarrier spacings of the RRC signaling configuration.

Note that a subcarrier spacing of μmeans that the subcarrier spacing is 15kHz multiplied by 2 to the power of μ. For example, μ ═ 0, SCS corresponding to 15 kHz; μ ═ 1, SCS corresponding to 30 kHz; μ ═ 2, SCS corresponding to 60 kHz; μ ═ 3, SCS corresponding to 120 kHz; μ ═ 4, corresponding to SCS at 240 kHz.

For example, see fig. 13a, which is an exemplary diagram of a cyclic prefix provided in an embodiment of the present application. Assume that the first SCS is 30kHz and the second SCS is 15 kHz. (1) A useful signal in the first OFDM symbol comprises 1-1024 sampling points; the cyclic prefix of the first OFDM symbol comprises 953-1024 sampling points. (2) For the second first OFDM symbol, the corresponding frequency domain signal is subjected to phase rotation processing, so that the useful signal is subjected to cyclic shift, and the useful signal after cyclic shift sequentially comprises 73-1024 sampling points and 1-72 sampling points. In this case, the cyclic prefix of the second first OFDM symbol includes the last 72 samples (i.e., samples # 1-72) of the cyclically shifted desired signal. As can be seen from FIG. 13a, the last 1024 sampling points of each of the two first OFDM symbols include 2 identical sampling points from number 1 to

number

1024, and 2048 sampling points. That is, sampling points 1 to 1024 are repeated 2 times in the time domain under the sampling window of the 2048 sampling points.

In conjunction with fig. 10a and 10b, AL ═ 2, assuming that CCE 0 corresponds to the first OFDM in the time domain and CCE 1 corresponds to the second first OFDM symbol in the time domain. For the case that the terminal receives control information on AL/2 CCEs, if the terminal receives control information on CCE 1, the terminal removes the cyclic prefix on the second first OFDM symbol to obtain the time domain signal of the second first OFDM symbol, and performs phase rotation processing on the time domain signal of the second first OFDM symbol to obtain the original frequency domain signal. For the second first OFDM symbol, removing the cyclic prefix number 1-72 sampling points, and then moving the last 72 sampling points (i.e. number 1-72 sampling points) of the useful signal to the front of number 73-1024 sampling points of the useful signal through cyclic shift to obtain a complete useful signal including number 1-1024 sampling points. In the digital domain, the phase rotation factor of the phase rotation process is:

in the analog domain, the phase rotation factor of the phase rotation process is:

if the terminal receives the control information on the CCE 0, the terminal removes the cyclic prefix on the first OFDM symbol, and can obtain the original frequency domain signal.

For example, see fig. 13b, another exemplary diagram of a cyclic prefix provided in the embodiments of the present application. Assume that the first SCS is 60kHz and the second SCS is 15 kHz. (1) The useful signal in the first OFDM symbol comprises sampling points 1-512; the cyclic prefix of the first OFDM symbol comprises 477-512 sampling points. (2) For the second first OFDM symbol, because the corresponding frequency domain signal is subjected to phase rotation processing, the useful signal is subjected to cyclic shift, and the useful signal subjected to cyclic shift sequentially comprises No. 37-512 sampling points and No. 1-36 sampling points; the cyclic prefix of the second first OFDM symbol includes the last 36 samples (i.e., samples No. 1-36) of the cyclically shifted useful signal. (3) For the third first OFDM symbol, because the corresponding frequency domain signal is subjected to phase rotation processing, the useful signal is subjected to cyclic shift, and the useful signal subjected to cyclic shift sequentially comprises 73-512 sampling points and 1-72 sampling points; the cyclic prefix of the third first OFDM symbol includes the last 36 samples (i.e., samples 37-72) of the cyclically shifted useful signal. (4) For the fourth first OFDM symbol, because the corresponding frequency domain signal is subjected to phase rotation processing, the useful signal is subjected to cyclic shift, and the useful signal subjected to cyclic shift sequentially comprises sampling points of 109-512 numbers and sampling points of 1-108 numbers; the cyclic prefix of the fourth first OFDM symbol includes the last 36 samples (i.e., 73-108 samples) of the cyclically shifted useful signal. As can be seen from FIG. 13b, the last 2048 sampling points of the four first OFDM symbols comprise 4 identical sampling points No. 1-512. That is, sampling points #1 to # 512 are repeated 4 times in the time domain under the sampling window of 2048 sampling points.

For the second way, please refer to fig. 14 for the case that the terminal receives the control information on AL CCEs, which is another exemplary diagram of repeatedly transmitting the control information provided in the embodiment of the present application. In FIG. 14, for 2ⁿThe terminal can obtain a time domain signal of the ith first OFDM symbol by removing a cyclic prefix in the ith first OFDM symbol; fast Fourier transformation corresponding to the first SCS is carried out on the time domain signal of the ith first OFDM symbol to obtain a frequency domain signal after phase rotation processing; then, the frequency domain signal after phase processing is divided by the phase rotation factor to determineThe original frequency domain signal.

For the second mode, for the case that the terminal receives control information on AL/2 CCEs, the terminal may be paired with 2ⁿAnd performing cyclic prefix removal, fast Fourier transform and division by the phase rotation factor processing on part of the first OFDM symbols to obtain original frequency domain signals of the part of the first OFDM symbols. Wherein, part of the first OFDM symbols may be odd numbered first OFDM symbols, may also be even numbered first OFDM symbols, or may be selected in other manners, and the number of the part of the first OFDM symbols is 2ⁿ/2. For example, AL ═ 8, the network device repeatedly transmits control information 1 over 8 first OFDM symbols (numbered 0 to 7), and the terminal receives 4 control information 1 over 4 first OFDM symbols, where the 4 first OFDM symbols may be numbered 0,2,4, 6;

numbers

1,3,5, 7;

numbers

0,1,2, 3;

numbers

4,5,6, 7; or

numbers

0,2,5,7, etc. For example, the terminal performs cyclic prefix removal, fast fourier transform, and division by the phase rotation factor on the first OFDM symbols numbered 0,1,2, and 3 to obtain the corresponding original frequency domain signals.

For convenience of description, the sub-carrier corresponding to the first SCS is simply referred to as the first sub-carrier, and the sub-carrier corresponding to the second SCS is simply referred to as the second sub-carrier. For a signal, repeating the signal in the time domain corresponds to interpolating the signal in the frequency domain by 0. Therefore, if the control information is in 2ⁿRepeat transmission on the first OFDM symbol, then 2ⁿThe signal value of the control information of the first SCS is equal to 0 at a position corresponding to the second SCS between two adjacent first subcarriers in any one of the first OFDM symbols. That is, in 2ⁿIn the first OFDM symbol, if the number of the first subcarrier in the resource grid is started from 0, the signal value of the control information of the first SCS is not 2 in numberⁿThe integer multiple of the second subcarrier is equal to 0.

For example, the SCS of the resource grid shown in FIG. 16(B) is the first SCS, and the second SCS of the resource grid shown in FIG. 16(A) is the first SCS, the first SCS is 30kHz, and the second SCS is 15 kHz. If the control information is repeatedly transmitted on the ninth OFDM symbol and the tenth OFDM symbol in the resource grid shown in fig. 16(B), the frequency spectrum of the control information on the ninth OFDM symbol may refer to fig. 15 (D). In fig. 15(D), the solid unidirectional arrows indicate subcarriers for carrying control information. In contrast to fig. 7(B), in fig. 15(D), since the signal energy of the control information at the position of the subcarrier #3 of 15kHz is equal to 0, the LTE CRS on the subcarrier #3 of 15kHz is not interfered by the control information, and the LTE CRS on the subcarrier #3 of 15kHz is not interfered by the control information.

As can be seen from fig. 15(B) or fig. 15(D), when the subcarrier spacing is numbered from 1 (or other odd numbers) in the frequency domain, with the method provided in the embodiment of the present application, since the 30kHz subcarrier spacing signal is set to 0 at the position of the corresponding odd-numbered 15kHz subcarrier, the 30kHz subcarrier spacing signal does not affect the reference signal carried by the odd-numbered 15kHz subcarrier (e.g., LTE CRS carried by the odd-numbered 15kHz subcarrier). According to the above method, when the subcarrier spacing is numbered from 1 (other odd numbers are also possible) in the frequency domain, the signal of the 30kHz subcarrier spacing is set to 0 at the position where the corresponding even-numbered 15kHz subcarrier is located in fig. 15(B) or fig. 15 (D).

From the above analysis it can be seen that since the signal of the first SCS does not correspond to a number of 2ⁿThe integer multiple of the second sub-carrier is located at 0. Thus, in the shared spectrum, the signal of the first SCS does not affect the corresponding number other than 2ⁿAn integer multiple of the second subcarrier signal. In other words, in the shared spectrum, the subcarrier number is not 2ⁿAt the REs corresponding to the integer multiple of the second SCS, the reference signal (e.g. LTE CRS) of the second SCS is not affected by the signal (e.g. control information) of the first SCS. For example, in the shared spectrum, the first SCS is 60kHz and the second SCS is 15kHz, the signal value of the first SCS is equal to 0 at the position corresponding to the second subcarrier with the

number

1,2,3 or other numbers not equal to integer multiples of 4.

Optionally, the embodiment shown in fig. 9 further includes that the network device sends the first configuration information to the terminal through a higher layer signaling (e.g., RRC signaling). Or the first configuration information is predefined.

The higher layer signaling may also be referred to as semi-static signaling and may be RRC signaling, broadcast messages, system messages, or Medium Access Control (MAC) Control Elements (CEs). The broadcast message may include a Remaining Minimum System Information (RMSI).

The network device may configure the terminal with the first configuration information of the second SCS on the BWP of the first SCS. Accordingly, the terminal may receive the first configuration information of the second SCS on the BWP of the first SCS.

In one possible implementation, the terminal determines the rate matching resource of the second SCS according to the first configuration information, and then obtains the rate matching resource on the BWP of the first SCS according to the relationship between the first SCS and the second SCS.

The first configuration information is used to indicate resources of a reference signal corresponding to the second SCS, where the resources may include one or more of time domain resources, frequency domain resources, spatial domain resources, or code domain resources, and the embodiments of the present application are described by taking time frequency resources as an example. The first configuration information may directly or indirectly indicate a time-frequency resource of a reference signal corresponding to the second SCS, and a specific indication manner is not limited in this embodiment of the application.

The first configuration information may configure a bandwidth, the number of antenna ports, an offset value, a center position of a carrier, a resource pattern (pattern), and the like. The number of antenna ports and the resource pattern have a corresponding relationship, for example, fig. 1 shows the resource pattern corresponding to one antenna port.

For example, the first configuration information is used to indicate time-frequency resources of an LTE CRS corresponding to 15kHz SCS, that is, the first configuration information is configuration information of the LTE CRS and is used to indicate time-frequency resources of the LTE CRS. The configuration information of the LTE CRS includes one or more of a bandwidth of the LTE carrier (e.g., 1.4M, 3M, or 5M, etc.), the number of antenna ports of the CRS (e.g., 1/2/4), an offset value of the CRS mapping REs (e.g., 0/1/2/3/4/5), and a center position of the LTE carrier.

The terminal determines the bandwidth size and the position of the frequency domain resource through the bandwidth and the central position of the carrier under the condition of receiving the first configuration information; determining a corresponding resource pattern according to the number of the antenna ports; then, according to the offset value and the resource pattern, the position of the RE carrying the reference signal in the resource grid is determined, that is, the time-frequency resource for carrying the reference signal in the resource grid corresponding to the second SCS is determined, that is, the rate matching resource of the second SCS is determined.

Furthermore, the terminal can determine the time-frequency resource position of the rate matching resource on the BWP of the first SCS according to the relation between the first SCS and the second SCS, wherein the SCS corresponding to the rate matching resource is the first SCS; wherein, the SCS corresponding to the resource indicated by the first configuration information is the second SCS, and the first SCS is 2 of the second SCSⁿAnd (4) doubling. Specifically, the terminal determines the resource of the reference signal corresponding to the second SCS (i.e., the rate matching resource of the second SCS) according to the first configuration information, and then determines the time-frequency resource location of the rate matching resource on the BWP of the first SCS according to the time-frequency resource location of the rate matching resource of the second SCS and the relationship between the first SCS and the second SCS. The rate matching resource on the BWP of the first SCS is the rate matching resource determined according to the first configuration information, and the rate matching resource referred to below is the rate matching resource on the BWP of the first SCS without further explanation.

For example, referring to fig. 16(a) and 16(B), the SCS of the resource grid shown in fig. 16(B) is the first SCS, the SCS of the resource grid shown in fig. 16(a) is the second SCS, the first SCS is 30kHz, and the second SCS is 15 kHz. The terminal obtains the rate matching resources of the second SCS, i.e., the black REs in fig. 16(a), according to the first configuration information. Thereafter, the terminal determines the rate matching resources of the first SCS, i.e., the black REs in fig. 16(B), according to the relationship between the first SCS and the second SCS, and the rate matching resources of the second SCS.

In another possible implementation manner, the terminal may obtain the rate matching resource of the first SCS directly according to the first configuration information. For example, the first configuration information may include one or more RE-level rate matching resource indication information, where the RE-level rate matching resource indication information includes indication information of a symbol index and RE position indication information that needs to be rate matched on a symbol corresponding to the symbol index. The indication information of the symbol index may be a 14-bit bitmap (bitmap), and the 14-bit bitmap is used to indicate the symbol index of one or more symbols; or may be a 4-bit index indication, the 4-bit index indicating a symbol index for indicating one symbol. The RE position indication information may be a 12-bit bitmap (bitmap), and the 12-bit bitmap is used to indicate that 1 or more REs are rate matching resources, where "1" in the bitmap indicates that the corresponding RE on the symbol is a rate matching resource. The terminal may determine the rate matching resources of the first SCS according to the one or more RE-level rate matching resource indication information.

When the resource of the first CCE and one CCE of the one or more second CCEs coincide with the rate matching resource, the control information is carried by the resource except the rate matching resource in the resources of the CORESET. I.e. control information at 2ⁿWhen the first OFDM symbol is repeatedly transmitted, if the resource on a certain first OFDM symbol coincides with the rate matching resource, the resource of the first OFDM symbol does not carry control information, in this 2ⁿResources of the first OFDM symbol other than the resources of the first OFDM symbol may carry control information.

Example 1, if the LTE CRS is transmitted on the first OFDM symbol in the resource grid shown in fig. 16(a), the frequency spectrum of the LTE CRS on the first OFDM symbol may be seen in fig. 15 (a). In fig. 15(a), bold black arrows indicate subcarriers used for carrying LTE CRS, dotted lines indicate subcarriers not used for carrying LTE CRS, and the interval between adjacent subcarriers is 15 kHz. For the LTE CRS on the first OFDM symbol in fig. 16(a), the rate matching resources are RE { (0,1), (0,2), (3,1), (3,2), (6,1), (6,2), (9,1), (9,2} in fig. 16 (B). When control information is repeatedly transmitted on the first OFDM symbol and the second OFDM symbol in the resource grid shown in fig. 16(B), since the rate matching resources are overlapped with the resources of the first OFDM symbol and the second OFDM symbol, and the overlapped parts are RE { (0,1), (0,2), (3,1), (3,2), (6,1), (6,2), (9,1), (9,2) } in fig. 16(B), no control information is carried on the subcarrier #0, the subcarrier #3, the subcarrier #6, and the subcarrier #9 of the first OFDM symbol and the second OFDM symbol, as can be seen from the frequency spectrum shown in fig. 15 (B). In fig. 15(B), dotted lines indicate subcarriers that are not used to carry control information, solid one-way arrows indicate subcarriers that can carry control information, and the interval between adjacent subcarriers is 30 kHz.

Example 2, if the LTE CRS is transmitted on the fifth OFDM symbol in the resource grid shown in fig. 16(a), the frequency spectrum of the LTE CRS on the first OFDM symbol may be seen in fig. 15 (C). In fig. 15(C), bold black arrows indicate subcarriers used for carrying LTE CRS, dotted lines indicate subcarriers not used for carrying LTE CRS, and the interval between adjacent subcarriers is 15 kHz. For the LTE CRS on the fifth OFDM symbol in fig. 16(a), the subcarriers of its rate matching resources do not coincide with the subcarriers corresponding to the 30kHz resource grid, i.e., the rate matching resources do not coincide with the resources of the ninth OFDM symbol and the tenth OFDM symbol in the 30kHz resource grid. Therefore, when the control information is repeatedly transmitted on the ninth OFDM symbol and the tenth OFDM symbol in the 30kHz resource grid, the control information can be carried on all subcarriers of the ninth OFDM symbol and the tenth OFDM symbol, as can be seen from the frequency spectrum shown in fig. 15 (D). In fig. 15(D), the solid unidirectional arrows indicate subcarriers that can carry control information, and the interval between adjacent subcarriers is 30 kHz.

As can be seen from examples 1 and 2, the control information is at 2ⁿWhen repeatedly transmitting on a first OFDM symbol, if the resource on a certain first OFDM symbol coincides with the rate matching resource, the resource of the first OFDM symbol does not carry control information, in 2ⁿAnd carrying control information on the resources except the resources of the first OFDM symbol. Based on this, the resource grids shown in fig. 16(a) and fig. 16(B) can be obtained, where fig. 16(a) is the same as fig. 6(a), and the black squares in fig. 16(B) indicate REs that do not carry control information, i.e., REs that need to perform rate matching based on LTE CRS for control information. Fig. 16(B) has more available RE resources and requires fewer RE resources for rate matching than fig. 6 (B).

In the examples of this application, 2ⁿOn each first OFDM symbol, any one first RE in a first RE set corresponding to each first OFDM symbol does not carry control information, and the first RE set and the second RE set are arranged inThere is an overlapping portion in the frequency domain. The first RE set is the rate matching resource on BWP of the first SCS described above. The second REs in the second RE set are used to carry reference signals corresponding to the second SCS, for example, to carry LTE CRS.

It is to be understood that, the overlapping portions of the first RE set and the second RE set in the frequency domain refer to the overlapping portions of one first RE in the first RE set and at least one second RE in the second RE set in the frequency domain. Or, there is an overlapping portion between one first RE in the second RE set and at least one second RE in the second RE set in the frequency domain.

The case where there is an overlapping portion between one RE and another RE in the frequency domain can be described with reference to fig. 6(a) and 6 (B). As can be seen from fig. 6(a) and 6(B), the first RE on the first OFDM symbol in fig. 6(a) and the first RE on the first OFDM symbol in fig. 6(B) have an overlapping portion in the frequency domain.

It is to be understood that the first RE included in the first RE set may be determined according to the second RE included in the second RE set. Alternatively, the position of the first RE in the first RE set may be determined according to the position of the second RE in the second RE set.

Optionally, for one second OFDM symbol, the second RE set is a subset of the third RE set. The third RE set corresponding to the second OFDM symbol includes all REs used for carrying reference signals on the second OFDM symbol. For example, referring to fig. 6(a), the third RE set corresponding to OFDM symbol #0 may be { (0,0), (6,0), (12,0), (18,0) }.

In one implementation, for one second OFDM symbol, any one RE in the third RE set belongs to the second RE set. That is, the second RE set is equal to the third RE set.

Illustratively, referring to fig. 6(a) and 6(B), the second OFDM symbol #0 in fig. 6(a) is aligned with the first OFDM symbol #0 and the first OFDM symbol #1 in fig. 6(B) in the time domain, and the second OFDM symbol #4 in fig. 6(a) is aligned with the first OFDM symbol #8 and the first OFDM symbol #9 in fig. 6(B) in the time domain. The third RE set includes RE { (3,4), (9,4), (15,4), (21,4) } corresponding to the second OFDM symbol #4, and RE { (0,0), (6,0), (12,0), (18,0) } corresponding to the second OFDM symbol # 0. The second set of REs is equal to the third set of REs. Thus, the first RE set includes RE { (1,8), (4,8), (7,8), (10,8), (1,9), (4,9), (7,9), (10,9) } corresponding to the first OFDM symbol #8 and the first OFDM symbol #9, and RE { (0,0), (3,0), (6,0), (9,0), (0,1), (3,1), (6,1), (9,1) } corresponding to the first OFDM symbol #0 and the first OFDM symbol # 1. As another implementation, for one second OFDM symbol, a part of REs in the third RE set belongs to the second RE set.

According to the method provided by the embodiment of the application, the control information is 2ⁿThe transmission is repeated on the first OFDM symbol, so that the control information and the subcarrier number on the second OFDM symbol are not 2ⁿThe reference signals carried on the integer multiples of REs do not interfere with each other. Thus, the control information need only number 2 for the sub-carrier on the second OFDM symbolⁿInteger multiple of and used to carry the RE of the reference signal for rate matching. Based on this consideration, the subcarrier number in the third RE set is 2ⁿREs of integer multiples of (d) belong to the second RE set. Thus, the subcarrier number of the second RE in the second RE set is 2ⁿInteger multiples of. It can be understood that, in this case, the subcarrier number of the first RE in the first RE set is 2ⁿMultiple equal to the number of one second RE in the second RE set.

Illustratively, referring to fig. 16(a) and 16(B), the second OFDM symbol #0 in fig. 16(a) is aligned in the time domain with the first OFDM symbol #0 and the first OFDM symbol #1 in fig. 16(B), and the second OFDM symbol #4 in fig. 16(a) is aligned in the time domain with the first OFDM symbol #8 and the first OFDM symbol #9 in fig. 16 (B). The third RE set includes RE { (3,4), (9,4), (15,4), (21,4) } corresponding to the second OFDM symbol #4, and RE { (0,0), (6,0), (12,0), (18,0) } corresponding to the second OFDM symbol # 0. Assume subcarrier number 2 in the third RE setⁿBelongs to the second RE set, since no RE exists in the sub-carriers corresponding to the second OFDM symbol #4 (3,4), (9,4), (15,4), (21,4) } having the sub-carrier number 2ⁿWhere n is equal to 1, and thus, RE { (4,3), (4,9), (4,15), (4,21) } corresponding to the second OFDM symbol #4 is not included in the second RE set, i.e., the second OFDM symbolThe second RE set corresponding to number #4 is an empty set. Thus, the first RE set includes the first OFDM symbol #0 and RE { (0,0), (3,0), (6,0), (9,0), (0,1), (3,1), (6,1), (9,1) } to which the first OFDM symbol #1 corresponds. Fig. 15(B) is a schematic diagram of a spectrum corresponding to the first OFDM symbol #8 or the first OFDM symbol # 9. In this embodiment, the first RE set, the second RE set, and the third RE set may be defined in a second SCS slot range, or may be defined in a second SCS symbol range, and this embodiment is not limited in this application. In the embodiment of the present application, the first OFDM symbol and the second OFDM symbol are respectively used to describe a type of signal. In the time domain of a block of time-frequency resources, one or more groups 2 may be includedⁿThe first OFDM symbol, which is not limited in this embodiment.

In the embodiment of the application, the CCE numbering adopts the numbering rule of the time domain first and the frequency domain later, and the REG numbering adopts the numbering rule of the frequency domain first and the time domain later, so that the control information can be set to be 2ⁿThe first OFDM symbol may be repeatedly transmitted and the control information of the first SCS may be rate matched around the reference signal of the second SCS, such that the control information and the reference signal may reduce transmission interference between the two in case of sharing resources but using different SCS. Even if the reference signal of the second SCS is a 4-port LTE CRS, the transmission interference between the control information and the LTE CRS can be reduced.

As an alternative embodiment, after the network device sends the control information according to the embodiment shown in fig. 9, the downlink data may be sent to the terminal according to the control information. Accordingly, after receiving the control information according to the embodiment shown in fig. 9, the terminal may receive downlink data according to the control information.

The downlink data may be PDSCH data, or may be described as PDSCH information, data transmitted through PDSCH, or the like. In the embodiment of the present application, the downlink data takes PDSCH data as an example.

The control information may indicate one or more of the following information: time-frequency resources of the PDSCH data, a modulation mechanism of the PDSCH data, a coding rate and the like. The time-frequency resource of the PDSCH data, that is, the time-frequency resource occupied by the network device transmitting the PDSCH data or the time-domain resource of the terminal receiving the PDSCH data, is described. The modulation scheme of the PDSCH data may be a Modulation and Coding Scheme (MCS) of the PDSCH data, and the MCS may indicate the modulation scheme and/or the coding rate.

In the case where two communication systems share resources but use different SCS, PDSCH data of one communication system and reference signals of the other communication system need to reduce transmission interference, e.g., NR PDSCH data and LTE CRS need to reduce transmission interference. Can be obtained by reaction at 2ⁿThe NR PDSCH data is repeatedly transmitted on the first OFDM symbol, 2ⁿThe mode that the first OFDM symbol is aligned with the reference signal in the time domain realizes the reduction of transmission interference, namely the mode of time domain repetition and frequency domain zero insertion.

As an alternative embodiment, before the embodiment shown in fig. 9 is executed, the following steps are also executed:

step 201, the terminal sends capability information to the network device. Accordingly, the network device receives the capability information from the terminal.

The capability information is used for indicating the analysis time required by the terminal to analyze the control information, the analysis time is less than a first threshold, and the first threshold is the minimum time interval between the beginning of analyzing the control information and the sending of the uplink data. The downlink data may be a Physical Uplink Shared Channel (PUSCH), or may be described as PUSCH data, PUSCH information, data transmitted via a PUSCH, and the like.

In the embodiment of the present application, the capability information may be represented by N3, where N3 is an analysis time, and the analysis time may be represented by the number of OFDM symbols, that is, how many OFDM symbols are needed to implement analysis of the control information, for example, N3 is equal to 3, which indicates that 3 OFDM symbols are needed to analyze the control information. The capability information may be understood as how many OFDM symbols at most are needed to resolve the control information. The value of N3 is related to the subcarrier spacing of the control information.

In the embodiment of the present application, the first threshold may be represented by N2, where N2 is a minimum time interval between when the terminal starts to analyze the control information and when the terminal transmits uplink data, and may be understood as a minimum value after a time length of analyzing the control information and a time length of preparing to transmit the uplink data. N2 may also be represented by the number of OFDM symbols, the value being related to the subcarrier spacing of the control information.

The terminal may report N2 and N3 to the network device together, or may report them separately, or report N2 and/or N3 to the network device together with other capability information of the terminal.

The terminal reports N3 to the network device, so that the network device can flexibly configure a search space location for the terminal, for example, configure a search space location scheduled by the slot. In the slot scheduling, the PDCCH and the PDSCH scheduled by the PDCCH are in the same slot. 2 for carrying control informationⁿThe first OFDM symbol may be continuous in time domain or discontinuous in time domain in one slot. The search space indicates which downlink resources may carry control information, and the search space position is a starting time domain position for receiving the control information.

Step 202, the network device sends the second configuration information to the terminal. Correspondingly, the terminal receives the second configuration information from the network equipment.

The second configuration information is used to indicate a starting time domain position of the received control information, and specifically may be used to indicate a starting time domain position of the received control information within the slot. The sum of the initial time domain position of the control information, the time domain length of the CORESET and the analysis time is less than a second threshold value, the second threshold value is the length of a time unit, and the time unit can be a time slot, a micro-time slot, a subframe, a half frame or a frame and the like. In the embodiment of the present application, a time slot is taken as an example of a time unit. Time domain length of CORESET

The parsing time, N3, and the starting time domain position of the control information, i.e., the starting time domain symbol position of the search space, may be represented by a symbol index.

Optionally, the second configuration information further includes one or more of a CORESET ID, a period and an offset within the period, a search space ID, or a search space type. The CORESET ID indicates the CORESET bound to the search space. The period and the intra-period offset indicate a period of the search space and a period offset. The search space ID indicates the search space. The search space type indicates a type of a search space divided into a UE-specific search space (for a single UE) and a common search space (for a group of UEs), and a type of blind detection control information (i.e., DCI type).

For the slot scheduling, the terminal does not expect that the sum of the initial time domain position, the time domain length of the CORESET and the analysis time is greater than or equal to the time length of one slot, so that the sum of the initial time domain position, the time domain length of the CORESET and the analysis time is less than a second threshold, and the second threshold is the time length of one slot. And if the sum of the initial time domain position, the time domain length of the CORESET and the analysis time is greater than or equal to a second threshold, the terminal does not expect to receive the control information of the slot.

And the terminal can determine the time-frequency resource of the control information according to the second configuration information and the CORESET configuration information under the condition of receiving the second configuration information and the CORESET configuration information. In this embodiment, when receiving the second configuration information and the CORESET configuration information, the terminal receives the control information according to the second configuration information and the CORESET configuration information, in combination with the embodiment shown in fig. 9.

For example, the starting time domain position of receiving the control information indicated by the second configuration information is the ninth or tenth OFDM symbol in fig. 6(B), the ninth or tenth OFDM symbol in fig. 6(B) is a time domain symbol corresponding to the LTE CRS on the fifth OFDM symbol in fig. 6(a), and according to the frequency spectrum shown in fig. 15(D), the network device may transmit the control information on all subcarriers of the ninth or tenth OFDM symbol in fig. 6(B), which may both avoid transmission interference and make the capacity of the control information large enough to schedule more terminals to transmit PDSCH.

It is understood that step 201 and step 202 can be performed separately from the embodiment shown in fig. 9, or can be performed in combination with the embodiment shown in fig. 9.

Corresponding to the method provided by the above method embodiment, the embodiment of the present application further provides a corresponding apparatus, where the apparatus includes a module for executing the above embodiment. The module may be software, hardware, or a combination of software and hardware. Fig. 17 shows a schematic of the structure of an apparatus. The apparatus 1700 may be a network device, a terminal device, a chip system, or a processor supporting the network device to implement the method, or a chip, a chip system, or a processor supporting the terminal device to implement the method. The apparatus may be configured to implement the method described in the method embodiment, and refer to the description in the method embodiment.

The apparatus 1700 may include one or more processors 1701, which may also be referred to as processing units, that may perform certain control functions. The processor 1701 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal chip, a DU or CU, etc.), execute a software program, and process data of the software program.

In an alternative design, the processor 1701 may also have instructions and/or data 1703 stored thereon, which instructions and/or data 1703 may be executed by the processor to cause the apparatus 1700 to perform the methods described in the method embodiments above.

In an alternative design, the processor 1701 may include a transceiver unit to perform receive and transmit functions. The transceiving unit may be, for example, a transceiving circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In yet another possible design, apparatus 1700 may include circuitry that may perform the functions of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the apparatus 1700 may include one or more memories 1702, on which instructions 1704 may be stored, which may be executed on the processor to cause the apparatus 1700 to perform the methods described in the above method embodiments. Optionally, the memory may further store data therein. Optionally, instructions and/or data may also be stored in the processor. The processor and the memory may be provided separately or may be integrated together. For example, the correspondence described in the above method embodiments may be stored in a memory or in a processor.

Optionally, the apparatus 1700 may further include a transceiver 1705 and/or an antenna 1706. The processor 1701, which may be referred to as a processing unit, controls the apparatus 1700. The transceiver 1705 may be referred to as a transceiver unit, a transceiver, a transceiving circuit, a transceiver, or the like, and is configured to implement a transceiving function.

In one possible design, an apparatus 1700 (e.g., an integrated circuit, a wireless device, a circuit module, or a terminal device, etc.) may include: receiving control information on a first CCE; receiving control information on one or more second CCEs; the first CCE and the one or more second CCEs are included in the CORESET, the CORESET comprises N CCEs, N is an integer greater than 1, and the number of the N CCEs meets the numbering rule of a time domain and a frequency domain. Thus, transmission interference between two communication systems can be reduced in case the two communication systems share spectrum resources but use different SCS.

Optionally, the CORESET includes M resource element groups REG, where the numbers of the M REGs satisfy a numbering rule of frequency domain first and time domain later, and M is an integer greater than 1. The combination of the numbering rule of REG and the numbering rule of CCE is the basis for achieving interference reduction in time domain repeated transmission.

Optionally, when a resource of one CCE of the first CCE and the one or more second CCEs coincides with the rate matching resource, the control information is carried by a resource other than the rate matching resource in the resources of the CORESET. Therefore, more resources for bearing control information are obtained, and fewer resources are occupied by the rate matching resources.

Optionally, the first configuration information is received, and the rate matching resource is determined according to the first configuration information, where the sub-carrier spacing SCS corresponding to the rate matching resource is different from the SCS corresponding to the resource indicated by the first configuration information.

Optionally, the capability information is sent, where the capability information indicates an analysis time required for analyzing the control information, the analysis time is less than or equal to a first threshold, and the first threshold is a minimum time interval between starting to analyze the control information and sending uplink data. The capability information is sent so that the network device can flexibly configure the search space location based on the capability information.

Optionally, the second configuration information is received, the second configuration information configures an initial time domain position for receiving the control information, a sum of the initial time domain position of the control information, the time domain length of the CORESET, and the parsing time is smaller than a second threshold, the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

The apparatus 1700 may also perform the method performed by the network device in the embodiment shown in fig. 9.

The processors and transceivers described herein may be implemented on Integrated Circuits (ICs), analog ICs, Radio Frequency Integrated Circuits (RFICs), mixed signal ICs, Application Specific Integrated Circuits (ASICs), Printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), Bipolar CMOS (bicmos), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

The apparatus in the description of the above embodiment may be a network device or a terminal device, but the scope of the apparatus described in the present application is not limited thereto, and the structure of the apparatus may not be limited by fig. 17. The apparatus may be a stand-alone device or may be part of a larger device. For example, the apparatus may be:

(1) a stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) a set of one or more ICs, which optionally may also include storage components for storing data and/or instructions;

(3) an ASIC, such as a modem (MSM);

(4) a module that may be embedded within other devices;

(5) receivers, terminals, smart terminals, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like;

(6) others, and so forth.

Fig. 18 provides a schematic structural diagram of a terminal device. The terminal device may be adapted to the architecture shown in fig. 8. For convenience of explanation, fig. 18 shows only main components of the terminal device. As shown in fig. 18, the terminal apparatus 1800 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the whole terminal, executing software programs and processing data of the software programs. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal device is started, the processor can read the software program in the storage unit, analyze and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit processes the baseband signals to obtain radio frequency signals and sends the radio frequency signals outwards in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal device, the radio frequency circuit receives a radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, the baseband signal is output to the processor, and the processor converts the baseband signal into the data and processes the data.

For ease of illustration, only one memory and processor are shown in FIG. 18. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this respect in the embodiment of the present invention.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 18 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In one example, the antenna and the control circuit having the transceiving function may be considered as a transceiving unit 1811 of the terminal device 1800, and the processor having the processing function may be considered as a processing unit 1812 of the terminal device 1800. As shown in fig. 18, the terminal device 1800 includes a transceiving unit 1811 and a processing unit 1812. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiving unit 1811 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 1811 may be regarded as a transmitting unit, that is, the transceiving unit 1811 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc. Optionally, the receiving unit and the sending unit may be integrated into one unit, or may be multiple units independent of each other. The receiving unit and the transmitting unit can be in one geographical position or can be dispersed in a plurality of geographical positions.

As shown in fig. 19, yet another embodiment of the present application provides an apparatus 1900. The device may be a terminal or a component of a terminal (e.g., an integrated circuit, a chip, etc.). The apparatus may also be a network device, and may also be a component of a network device (e.g., an integrated circuit, a chip, etc.). The apparatus may also be another communication module, which is used to implement the method in the embodiment of the method of the present application. The apparatus 1900 may include a processing module 1902 (processing unit). Optionally, a transceiver module 1901 (transceiver unit) and a storage module 1903 (storage unit) may be further included.

In one possible design, one or more of the modules in FIG. 19 may be implemented by one or more processors or by one or more processors and memory; or by one or more processors and transceivers; or by one or more processors, memories, and transceivers, which are not limited in this application. The processor, the memory and the transceiver can be arranged independently or integrated.

The apparatus has a function of implementing the terminal device described in the embodiment of the present application, for example, the apparatus includes a module or a unit or means (means) corresponding to the step of executing the terminal device described in the embodiment of the present application by the terminal device, and the function or the unit or the means (means) may be implemented by software or hardware, or may be implemented by hardware executing corresponding software, or may be implemented by a combination of software and hardware. Reference may be made in detail to the respective description of the corresponding method embodiments hereinbefore.

Or the apparatus has a function of implementing the network device described in the embodiment of the present application, for example, the apparatus includes a module or a unit or means (means) corresponding to the step of executing the network device described in the embodiment of the present application by the network device, and the function or the unit or the means (means) may be implemented by software or hardware, or may be implemented by hardware executing corresponding software, or may be implemented by a combination of software and hardware. Reference may be made in detail to the respective description of the corresponding method embodiments hereinbefore.

Optionally, each module in the apparatus 1900 in this embodiment of the present application may be configured to perform the method described in fig. 9 in this embodiment of the present application.

In one possible implementation, an apparatus 1900 may include a transceiver module 1901 and a processing module 1902, the transceiver module 1901 configured to receive control information on a first CCE; receiving the control information on one or more second CCEs; the first CCE and the one or more second CCEs are included in a CORESET, the CORESET comprises N CCEs, N is an integer greater than 1, and the number of the N CCEs meets the numbering rule of a time domain and a frequency domain. Thus, transmission interference between two communication systems can be reduced in case the two communication systems share spectrum resources but use different SCS. The combination of the numbering rule of REG and the numbering rule of CCE is the basis for achieving interference reduction in time domain repeated transmission.

Optionally, the CORESET includes M REGs, the numbers of the M REGs satisfy a numbering rule of a frequency domain first and a time domain second, and M is an integer greater than 1. The combination of the numbering rule of REG and the numbering rule of CCE is the basis for achieving interference reduction in time domain repeated transmission.

Optionally, the processing module 1902 is configured to determine that, when a resource of one CCE of the first CCE and the one or more second CCEs coincides with a rate matching resource, the control information is carried by a resource other than the rate matching resource in the resources of the CORESET. Therefore, more resources for bearing control information are obtained, and fewer resources are occupied by the rate matching resources.

Optionally, the transceiver module 1901 is further configured to receive first configuration information; the processing module 1902 is further configured to determine, according to the first configuration information, the rate matching resource, where an SCS corresponding to the rate matching resource is different from an SCS corresponding to a resource indicated by the first configuration information.

Optionally, the transceiver module 1901 is further configured to send capability information, where the capability information indicates an analysis time required for analyzing the control information, where the analysis time is less than or equal to a first threshold, and the first threshold is a minimum time interval between starting to analyze the control information and sending uplink data. The capability information is sent so that the network device can flexibly configure the search space location based on the capability information.

Optionally, the transceiver module 1901 is further configured to receive second configuration information, where the second configuration information configures an initial time domain position for receiving the control information, a sum of the initial time domain position of the control information, the time domain length of the CORESET, and the parsing time is smaller than a second threshold, the second threshold is a time domain length of a time unit, and the time unit is a time slot, a micro time slot, a subframe, a half frame, or a frame.

In one possible implementation manner, the apparatus 1900 may further perform the method performed by the network device in the embodiment shown in fig. 9.

It is understood that some optional features in the embodiments of the present application may be implemented independently without depending on other features in some scenarios, such as a currently-based solution, to solve corresponding technical problems and achieve corresponding effects, or may be combined with other features according to requirements in some scenarios. Accordingly, the apparatuses provided in the embodiments of the present application may also implement these features or functions, which are not described herein again.

Those skilled in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the present application may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

It should be understood that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components.

The techniques described herein may be implemented by various means. For example, these techniques may be implemented in hardware, software, or a combination of hardware and software. For a hardware implementation, the processing units used to perform these techniques at a communication device (e.g., a base station, terminal, network entity, or chip) may be implemented in one or more general-purpose processors, DSPs, digital signal processing devices, ASICs, programmable logic devices, FPGAs, or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combinations of the above. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The present application also provides a computer-readable medium having stored thereon a computer program which, when executed by a computer, performs the functions of any of the method embodiments described above.

The present application also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., an SSD), among others.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It should also be understood that, in the present application, "when …", "if" and "if" all refer to the fact that the UE or the base station will perform the corresponding processing under certain objective conditions, and are not limited time, and do not require the UE or the base station to perform certain judgment actions, nor do they mean that there are other limitations.

Reference in the present application to an element using the singular is intended to mean "one or more" rather than "one and only one" unless specifically stated otherwise. In the present application, unless otherwise specified, "at least one" is intended to mean "one or more" and "a plurality" is intended to mean "two or more".

Additionally, the terms "system" and "network" are often used interchangeably herein.

It should be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

The correspondence shown in the tables in the present application may be configured or predefined. The values of the information in each table are only examples, and may be configured to other values, which is not limited in the present application. When the correspondence between the information and each parameter is configured, it is not always necessary to configure all the correspondences indicated in each table. For example, in the table in the present application, the correspondence shown in some rows may not be configured. For another example, appropriate modification adjustments, such as splitting, merging, etc., can be made based on the above tables. The names of the parameters in the tables may be other names understandable by the communication device, and the values or the expression of the parameters may be other values or expressions understandable by the communication device. When the above tables are implemented, other data structures may be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables may be used.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The same or similar parts between the various embodiments in this application may be referred to each other. In the embodiments and the implementation methods/implementation methods in the embodiments in the present application, unless otherwise specified or conflicting in logic, terms and/or descriptions between different embodiments and between various implementation methods/implementation methods in various embodiments have consistency and can be mutually cited, and technical features in different embodiments and various implementation methods/implementation methods in various embodiments can be combined to form new embodiments, implementation methods, or implementation methods according to the inherent logic relationships thereof. The above-described embodiments of the present application do not limit the scope of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting control information, comprising:

receiving control information on a first control channel element, CCE;

receiving the control information on one or more second CCEs;

the first CCE and the one or more second CCEs are included in a control resource set (CORESET), the CORESET includes N CCEs, N is an integer greater than 1, and the number of the N CCEs meets the numbering rule of a time domain and a frequency domain.

2. The method of claim 1, wherein the CORESET comprises M resource element groups REG, wherein the numbering of the M REGs satisfies a numbering rule of frequency domain first and time domain second, and M is an integer greater than 1.

3. The method of claim 1 or 2, wherein when a resource of one of the first CCE and the one or more second CCEs overlaps with a rate matching resource, the control information is carried by a resource other than the rate matching resource among the resources of the CORESET.

4. The method of claim 3, further comprising:

receiving first configuration information, and determining the rate matching resources according to the first configuration information, wherein a subcarrier interval (SCS) corresponding to the rate matching resources is different from an SCS corresponding to the resources indicated by the first configuration information.

5. The method according to any one of claims 1-4, further comprising:

and sending capability information, wherein the capability information indicates analysis time required for analyzing the control information, the analysis time is less than or equal to a first threshold, and the first threshold is a minimum time interval between the beginning of analyzing the control information and the sending of uplink data.

6. The method of claim 5, further comprising:

receiving second configuration information, wherein the second configuration information configures an initial time domain position for receiving the control information, the sum of the initial time domain position of the control information, the time domain length of the CORESET and the analysis time is less than a second threshold, the second threshold is the time domain length of a time unit, and the time unit is a time slot, a micro-time slot, a subframe, a half frame or a frame.

7. A method for transmitting control information, comprising:

transmitting control information on a first control channel element, CCE;

transmitting the control information on one or more second CCEs;

8. The method of claim 7, wherein the CORESET comprises M Resource Element Groups (REGs), wherein the numbering of the M REGs satisfies a numbering rule of frequency domain first and time domain second, and M is an integer greater than 1.

9. The method according to claim 7 or 8,

when the resource of the first CCE and one CCE of the one or more second CCEs is coincident with the rate matching resource, the control information is carried by the resource except the rate matching resource in the resources of the CORESET.

10. The method of claim 9, further comprising:

and sending first configuration information, wherein the first configuration information is used for determining the rate matching resources, and a subcarrier spacing SCS corresponding to the rate matching resources is different from an SCS corresponding to the resources indicated by the first configuration information.

11. The method according to any one of claims 7-10, further comprising:

receiving capability information indicating a parsing time required to parse the control information.

12. The method of claim 11, further comprising:

and sending second configuration information, wherein the second configuration information configures the initial time domain position of the control information, the sum of the initial time domain position of the control information, the time domain length of the CORESET and the analysis time is less than a second threshold, the second threshold is the time domain length of a time unit, and the time unit is a time slot, a micro-time slot, a subframe, a half frame or a frame.

13. A communication apparatus, characterized in that the apparatus is adapted to implement the method of any of claims 1 to 6.

14. A communication apparatus, characterized in that the apparatus is adapted to implement the method of any of claims 7 to 12.

15. A communications apparatus, comprising: a processor coupled to a memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1 to 6.

16. A communications apparatus, comprising: a processor coupled to a memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 7 to 12.

17. A storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any of claims 1 to 6.

18. A storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any of claims 7 to 12.

19. A communication system, comprising: the apparatus as claimed in claim 13, and/or the apparatus as claimed in claim 14.

20. A communication system, comprising: the apparatus as claimed in claim 15, and/or the apparatus as claimed in claim 16.