CN112399614A

CN112399614A - Communication method and device

Info

Publication number: CN112399614A
Application number: CN201910741116.3A
Authority: CN
Inventors: 王晓娜; 管鹏; 黄煌
Original assignee: Chengdu Huawei Technology Co Ltd
Current assignee: Chengdu Huawei Technology Co Ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2021-02-23
Anticipated expiration: 2039-08-12
Also published as: CN112399614B

Abstract

The application provides a communication method and device. According to the method, the network device may send first information to the terminal apparatus, the first information including a cross-carrier scheduling scheme of a target carrier, the cross-carrier scheduling scheme including: at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on the scheduling carrier. Therefore, the network equipment can indicate the cross-carrier scheduling scheme of the target carrier to the terminal device so as to realize the scheduling of the user data through the scheme.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

The existing wireless communication protocol supports two multi-carrier joint scheduling modes. One is self-carrier scheduling, i.e., the control channel and the corresponding data channel are carried on the same carrier. When a certain carrier of the terminal is configured for self-carrier scheduling, the terminal will only receive control channels on that carrier. The second is cross-carrier scheduling, i.e. the control channel and the corresponding data channel are carried on different carriers. For example, in cross-carrier scheduling, a control channel of a High Frequency (HF) carrier may be carried by a Low Frequency (LF) carrier. When a certain carrier of the terminals is configured for cross-carrier scheduling, the terminals will not receive the control channel on that carrier.

For high-frequency and low-frequency cooperative transmission, if the characteristics of large high-frequency propagation loss and limited channel number are considered, the high-frequency data transmission can be scheduled by using low-frequency resources, namely, the reliability of a high-frequency control channel is improved by cross-carrier scheduling, but the waiting time delay of user services is increased; if the characteristics of short high-frequency scheduling time slot and large transmission bandwidth are considered, high-frequency self-carrier scheduling is utilized to reduce the waiting delay and the transmission delay of a user service packet, but downlink user scheduling is limited.

Therefore, the current multi-carrier joint scheduling mode only has two schemes of self-carrier scheduling and cross-carrier scheduling, and the flexibility of user scheduling needs to be improved.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for improving the flexibility of user service scheduling.

In a first aspect, the present application provides a method of communication. The method may be performed by a network device. According to the method, the network device may send first information to the terminal apparatus, the first information including a cross-carrier scheduling scheme of a target carrier, the cross-carrier scheduling scheme including: at least one control channel of a target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on a scheduling carrier. Therefore, the network equipment can indicate the cross-carrier scheduling scheme of the control channel of the target carrier to the terminal device so as to realize the scheduling of the user data through the scheme.

It should be understood that the first information is described herein by taking the information including the target scheduling scheme as an example, but it should not be understood that the first information can only include the information of the cross-carrier scheduling scheme. In this embodiment, the first information may include at least one scheduling scheme in the scheduling schemes, and therefore, the cross-carrier scheduling scheme included in the first information may be replaced with the scheduling scheme, and the scheduling scheme may include at least one of the following transmission schemes of the control channel of the target carrier: at least one control channel of the target carrier is carried by the target carrier and at least another control channel of the target carrier is carried by the scheduling carrier, or the control channel of the target carrier is transmitted only by the scheduling carrier (i.e. cross-carrier scheduling scheme), or the control channel of the target carrier is transmitted only by the target carrier.

In one possible design, the network device may also select the cross-carrier scheduling scheme from a plurality of cross-carrier scheduling schemes for a control channel of the target carrier. The plurality of cross-carrier scheduling schemes may include a scheme in which a control channel of a target carrier is transmitted by a scheduling carrier, a scheme in which a control channel of a target carrier is jointly transmitted by a target carrier and a scheduling carrier, and a scheme in which a control channel of a target carrier is transmitted by a target carrier. The scheme in which the control channel of the target carrier is jointly transmitted by the target carrier and the scheduling carrier comprises the cross-carrier scheduling scheme of the first aspect.

By adopting the design, the network equipment can select the cross-carrier scheduling scheme from the multiple cross-carrier scheduling schemes according to the current service load of the cell and the user and indicate the cross-carrier scheduling scheme to the terminal device so as to improve the flexibility of user data scheduling.

In one possible design, a first control channel of the target carrier may be carried on the target carrier and a second control channel of the target carrier may be carried on the scheduling carrier.

Illustratively, the first control channel may be used to schedule a data channel for a first time slot and the second control channel may be used to schedule a data channel for a second time slot.

The first time slot may be determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier, and the second time slot may be determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier.

By adopting the design, a cross-carrier scheduling scheme can be set according to the subcarrier interval of the target carrier and the subcarrier interval of the scheduling carrier, so that the flexibility of user data scheduling is realized.

For example, the first control channel may be further configured to carry control information in a first format, and the second control channel may be further configured to carry control information in a second format.

Wherein the first format may include at least one of the following formats: format 0_ 0; alternatively, format 0_ 1; alternatively, format 1_ 0; alternatively, format 1_ 1; alternatively, format 2_ 0; alternatively, format 2_ 1; alternatively, format 2_ 2; alternatively, format 2_ 3. The second format may include at least one of the following formats: format 0_ 0; alternatively, format 0_ 1; alternatively, format 1_ 0; alternatively, format 1_ 1; alternatively, format 2_ 0; alternatively, format 2_ 1; alternatively, format 2_ 2; alternatively, format 2_ 3. Wherein the first format is different from the second format.

By adopting the design, the cross-carrier scheduling scheme can be set according to the format of the control information, the flexibility in user data scheduling is realized, and the blind detection times of the target carrier control channel are reduced.

In one possible design, the first information may be carried in one or more of an RRC message, a MAC-CE message, or downlink control information.

By adopting the design, the first information can be borne through RRC information, MAC-CE information or downlink control information, and the flexible transmission of the first information is realized. Specifically, when the first information is transmitted through the RRC message, the network device may configure a long-term effective cross-carrier scheduling scheme to the terminal. Since the MAC-CE message is a lower layer message than the RRC message, when the first information is transmitted through the MAC-CE message, the network device may dynamically select the target scheduling scheme more flexibly than when the first information is transmitted through the RRC message. In addition, when the first information is sent through the downlink control information, a system or different cross-carrier scheduling schemes can be configured for each control channel of the target carrier, and the configuration flexibility is further improved.

In one possible design, the first information further includes one or more of the following information: target carrier identification, scheduling carrier identification, target carrier BWP identification, scheduling carrier BWP identification, cross-carrier scheduling scheme and cross-carrier scheduling scheme list; wherein the cross-carrier scheduling scheme list comprises information of one or more alternative cross-carrier scheduling schemes.

Illustratively, the cross-carrier scheduling identifier may be used to indicate that the cross-carrier scheduling scheme is the nth cross-carrier scheduling scheme among a plurality of alternative cross-carrier scheduling schemes, where N is a positive integer, N is greater than or equal to 1 and less than or equal to N, and N is the number of the alternative cross-carrier scheduling schemes. The plurality of alternative cross-carrier scheduling schemes may be indicated to the terminal device by the network equipment, or defined by a protocol, or pre-configured to the terminal device.

By adopting the design, the cross-carrier scheduling scheme is indicated from a plurality of alternative cross-carrier scheduling schemes by adopting the cross-carrier scheduling identifier, and the cross-carrier scheduling scheme can be indicated by fewer bits, so that the signaling overhead in the process of transmitting the first information is reduced. For example, all the cross-carrier scheduling schemes include 16 different schemes, if the number of each scheme indicates a cross-carrier scheduling scheme, 4 bits may be needed to be only 16 schemes, but if some alternative cross-carrier scheduling schemes, such as 8 alternative cross-carrier scheduling schemes, are indicated in advance by the network device (or defined by a protocol or determined by a preconfigured way), the first information only needs to carry 3 bits to indicate all the alternative cross-carrier scheduling schemes, so that the length of the bits occupied by the first information is reduced.

In a second aspect, the present application provides a communication method, which may be implemented by a terminal device. According to the method, the terminal device may receive first information from the network apparatus and receive a control channel of a target carrier according to the first information. Wherein the first information includes a target carrier control channel cross-carrier scheduling scheme (hereinafter, may be referred to as a cross-carrier scheduling scheme), and the target carrier control channel cross-carrier scheduling scheme includes: at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on the scheduling carrier.

In one possible design, the first control channel may be used to schedule a data channel for a first time slot, and the second control channel may be used to schedule a data channel for a second time slot; alternatively, the first control channel may be used to carry control information in a first format, and the second control channel may be used to carry control information in a second format.

In one possible design, the first time slot may be determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier, and the second time slot may be determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier.

In one possible design, the first format may include at least one of: format 0_ 0; alternatively, format 0_ 1; alternatively, format 1_ 0; alternatively, format 1_ 1; alternatively, format 2_ 0; alternatively, format 2_ 1; alternatively, format 2_ 2; alternatively, format 2_ 3. The second format may include at least one of the following formats: format 0_ 0; alternatively, format 0_ 1; alternatively, format 1_ 0; alternatively, format 1_ 1; alternatively, format 2_ 0; alternatively, format 2_ 1; alternatively, format 2_ 2; alternatively, format 2_ 3. The above first format is different from the second format.

In one possible design, the first information may be carried in at least one of the following information: an RRC message; a MAC-CE message; and downlink control information.

In one possible design, the first information may also include one or more of the following information: target carrier identification, scheduling carrier identification, target carrier BWP identification, scheduling carrier BWP identification, cross-carrier scheduling scheme and cross-carrier scheduling scheme list; wherein the cross-carrier scheduling scheme list comprises information of one or more alternative cross-carrier scheduling schemes.

Illustratively, the cross-carrier scheduling identifier is used to indicate that the cross-carrier scheduling scheme is the nth cross-carrier scheduling scheme among a plurality of alternative cross-carrier scheduling schemes, where N is a positive integer, N is greater than or equal to 1 and less than or equal to N, and N is the number of the alternative cross-carrier scheduling schemes.

In a third aspect, an embodiment of the present application provides a communication apparatus. The communication means may be adapted to perform the steps performed by the network device in the first aspect or any of the possible designs of the first aspect. The communication apparatus may implement the functions of the above methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.

When the communication device according to the third aspect is implemented by software modules, the communication device may include a communication module and a processing module, which are coupled to each other, wherein the communication module may be configured to support the communication device for communication, and the processing module may be configured to perform processing operations on the communication device, such as generating information/messages to be transmitted or processing received signals to obtain the information/messages.

In performing the steps of the first aspect, the communication module may be configured to send first information to a terminal apparatus, where the first information includes a cross-carrier scheduling scheme of a target carrier, and the cross-carrier scheduling scheme includes: at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on the scheduling carrier.

In one possible design, the processing module may be to select the cross-carrier scheduling scheme from a plurality of cross-carrier scheduling schemes for a control channel of the target carrier. The plurality of cross-carrier scheduling schemes may include a scheme in which the control channel of the target carrier is transmitted by a scheduling carrier, a scheme in which the control channel of the target carrier is jointly transmitted by the target carrier and the scheduling carrier, and a scheme in which the control channel of the target carrier is transmitted by the target carrier. The scheme that the control channel of the target carrier is jointly transmitted by the target carrier and the scheduling carrier comprises the cross-carrier scheduling scheme.

The first time slot may be determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier, and the second time slot may be determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier. The processing module may be configured to determine the first time slot and the second time slot.

When the communication device according to the third aspect is implemented by hardware components, the communication device may comprise a memory and a processor. Wherein the memory is operable to store instructions and the processor is operable to retrieve and execute the instructions from the memory to perform the steps performed by the network device in the first aspect or any of the possible designs of the first aspect.

The communication device may also include a transceiver for the communication device to communicate.

In particular, the transceiver may be configured to perform the steps performed by the above communication module, and/or the processor may be configured to perform the steps performed by the above processing module.

In a fourth aspect, an embodiment of the present application provides a communication apparatus. The communication device may be adapted to perform the steps performed by the terminal device in the second aspect or any of the possible designs of the second aspect. The communication apparatus may implement the functions of the above methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.

When the communication apparatus of the fourth aspect is implemented by a software module, the communication apparatus may include a communication module and a processing module, which are coupled to each other, wherein the communication module may be configured to support the communication apparatus to perform communication, and the processing module may be configured to perform processing operations on the communication apparatus, such as generating information/messages to be transmitted or processing received signals to obtain the information/messages.

In performing the steps of the second aspect, the communication module may be configured to receive first information from a network device, and receive a control channel of a target carrier according to the first information. Wherein the first information includes a target carrier control channel cross-carrier scheduling scheme, and the target carrier control channel cross-carrier scheduling scheme includes: at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on the scheduling carrier.

When the communication device of the fourth aspect is implemented by hardware components, the communication device may include a memory and a processor. Wherein the memory is operable to store instructions from which the processor is operable to invoke and execute the instructions to perform the steps performed by the network device in the second aspect or any of the possible designs of the second aspect.

In a fifth aspect, the present application provides a communication system that may include the communication apparatus shown in the third aspect and the communication apparatus shown in the fourth aspect. Wherein, the communication device shown in the third aspect may be composed of software modules and/or hardware components. The communication means shown in the fourth aspect may be constituted by software modules and/or hardware components.

Taking the communication apparatus in the third aspect as network equipment and the communication apparatus in the fourth aspect as a terminal apparatus as an example, in the communication system provided in the embodiment of the present application, the network equipment may send first information to the terminal apparatus, where the first information includes a cross-carrier scheduling scheme of a target carrier, and the cross-carrier scheduling scheme includes: at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on the scheduling carrier. The terminal device may be configured to receive first information from the network apparatus and receive a control channel of a target carrier according to the first information.

In a sixth aspect, the present application provides a computer storage medium having instructions (or programs) stored therein, which when invoked for execution on a computer, cause the computer to perform the method described in the first aspect or any one of the possible designs of the first aspect, or the second aspect or any one of the possible designs of the second aspect.

In a seventh aspect, the present application provides a computer program product, which may contain instructions, when the computer program product runs on a computer, cause the computer to perform the method as described in the first aspect or any one of the possible designs of the first aspect, or in the second aspect or any one of the possible designs of the second aspect.

In an eighth aspect, the present application provides a chip and/or a chip system comprising a chip, which chip may comprise a processor. The chip may also include a memory (or storage module) and/or a transceiver (or communication module). The chip may be adapted to perform the method as described in the first aspect or any one of the possible designs of the first aspect, or in the second aspect or any one of the possible designs of the second aspect. The chip system may be formed by the above chip, and may also include the above chip and other discrete devices, such as a memory (or a storage module) and/or a transceiver (or a communication module).

Advantageous effects in the second to eighth aspects and possible designs thereof described above reference may be made to the description of advantageous effects of the method described in the first aspect and any of its possible designs.

Drawings

Fig. 1 is a schematic architecture diagram of a wireless communication system provided in the present application;

fig. 2 is a schematic flow chart of a communication method provided in the present application;

fig. 3 is a schematic diagram illustrating a corresponding relationship between time slots of a high-frequency carrier and a low-frequency carrier according to the present application;

fig. 4 is a schematic diagram of a cross-carrier scheduling scheme provided in the present application;

fig. 5 is a schematic diagram of another cross-carrier scheduling scheme provided in the present application;

fig. 6 is a schematic diagram of another cross-carrier scheduling scheme provided in the present application;

fig. 7 is a schematic diagram of another cross-carrier scheduling scheme provided in the present application;

fig. 8 is a schematic structural diagram of a MAC-CE message provided in the present application;

fig. 9 is a schematic structural diagram of another MAC-CE message provided in the present application;

fig. 10 is a schematic structural diagram of a communication device provided in the present application;

fig. 11 is a schematic structural diagram of another communication device provided in the present application;

fig. 12 is a schematic structural diagram of another communication device provided in the present application;

fig. 13 is a schematic structural diagram of another communication device provided in the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied to apparatus embodiments or system embodiments.

The following explains terms referred to in the present application:

at least one of: means one, or more than one, i.e. including one, two, three and more.

A plurality of: two or more, i.e. two, three or more.

Carrying: it may mean that a message is used to carry some information or data, or that a message is composed of some information.

Coupling: refers to an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other, for information interaction between the devices, units or modules.

Carrier Aggregation (CA): refers to a transmission technique in which two or more carriers are aggregated together to obtain a larger transmission bandwidth. Based on the carrier aggregation technology, the terminal device can simultaneously utilize a plurality of carriers to perform uplink and downlink transmission according to the capability and bandwidth transmission requirements of the terminal device. The multiple carriers simultaneously accessed by the terminal device may belong to the same frequency band or belong to multiple different frequency bands.

Carrier wave: each carrier corresponds to an independent cell. The cell may be a primary cell (PCell) or a secondary cell (SCell). For a terminal device configured with carrier aggregation, it may be simultaneously connected with one PCell and multiple scells (e.g., the terminal device may be simultaneously connected with up to four scells) for uplink and downlink transmission via carriers corresponding to the PCell and the multiple scells. The PCell and the scells constitute a serving cell (serving cell) set of the terminal device. In the present application, a carrier is also referred to as a Component Carrier (CC).

Primary cell (PCell): the cell refers to a cell where a terminal device performs initial connection establishment, a cell where Radio Resource Control (RRC) connection reestablishment is performed, or a primary cell designated in a handover (handover) process. The PCell is responsible for RRC transmission communication with the terminal device. A carrier corresponding to a PCell may be referred to as a primary carrier, or Primary Component Carrier (PCC).

Secondary cell (SCell): refers to a cell added through an RRC reconfiguration (RRC connection reconfiguration) message after an initial security activation procedure (initial security activation procedure) for providing an additional radio resource to the terminal apparatus. There is no RRC communication between the SCell and the terminal device. The carrier corresponding to the SCell may be referred to as a secondary carrier, or a Secondary Component Carrier (SCC).

Index of carrier: the index of the carrier may be used to identify each carrier. Each carrier has a corresponding index, and the index of the main carrier is fixed to be 0; the index of each secondary carrier of the terminal device may be transmitted to the terminal device through RRC signaling for the terminal device.

It should be further understood that, for a terminal device supporting multi-carrier transmission in the present application, a carrier used for carrying a data channel may be referred to as a target carrier (in other words, the target carrier carries the data channel, or a resource of the target carrier carries the data channel), and a carrier carrying a control channel corresponding to the data channel may be referred to as a scheduling carrier (in other words, the scheduling carrier carries the control channel, or a resource of the scheduling carrier carries the control channel). It should be understood that the scheduling carrier may be the same carrier as the target carrier, or the scheduling carrier may be a different carrier from the target carrier.

As shown in fig. 1, the communication method provided in the embodiment of the present application is applicable to a wireless communication system 100, and the wireless communication system 100 may include a terminal apparatus 101 and a network device 102. Wherein the terminal apparatus 101 is configured to support carrier aggregation, the terminal apparatus 101 may be connected to a plurality of carrier units of the network device 102, including one primary carrier unit and one or more secondary carrier units.

It should be understood that the above wireless communication system 100 may be applicable to both low frequency scenarios (sub 6G) and high frequency scenarios (above 6G). The application scenarios of the wireless communication system 100 include, but are not limited to, a Long Term Evolution (LTE) system, a Frequency Division Duplex (FDD) system, a Time Division Duplex (TDD) system, a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a Cloud Radio Access Network (CRAN) system, a future fifth Generation (5th-Generation, 5G) system, a New Radio (NR) communication system, or a future evolved Public Land Mobile Network (PLMN) system.

The terminal apparatus 101 shown above may be User Equipment (UE), terminal (terminal), access terminal, terminal unit, terminal station, Mobile Station (MS), remote station, remote terminal, mobile terminal (mobile terminal), wireless communication device, terminal agent, or terminal apparatus. The terminal apparatus 101 may have a wireless transceiving function, which is capable of communicating (e.g., wirelessly communicating) with one or more network devices of one or more communication systems and receiving network services provided by the network devices, such as but not limited to the network device 102 shown in fig. 1.

The terminal device 101 may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN network, and the like.

In addition, the terminal apparatus 101 may be deployed on land, including indoors or outdoors, hand-held, or vehicle-mounted; the terminal device 101 may also be deployed on the water surface (e.g., a ship, etc.); the terminal device 101 may also be deployed in the air (e.g., aircraft, balloons, satellites, etc.). The terminal device 101 may be a mobile phone (mobile phone), a tablet (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), 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 home (smart home), and the like. The terminal apparatus 101 may be a communication chip having a communication module.

Network device 102 may be an access network device (or access network site). The access network device refers to a device capable of providing a network access function, such as a Radio Access Network (RAN) base station, and the like. The network device 102 may specifically include a Base Station (BS), or include a base station and a radio resource management device for controlling the base station, and the like. The network device 102 may also include relay stations (relay devices), access points, and base stations in future 5G networks, base stations or NR base stations in future evolved PLMN networks, and the like. The network device 102 may be a wearable device or a vehicle mounted device. The network device 102 may also be a communication chip having a communication module.

For example, network device 102 may include, but is not limited to: a next generation base station (gbb) in 5G, an evolved node B (eNB) in an LTE system, a radio controller in a CRAN system, a home base station (e.g., home evolved node B or home node B, HNB), a baseBand unit (BBU), a transmission point (TRP), a Transmission Point (TP), or a mobile switching center (msc).

It should be understood that the wireless communication system 100 shown in fig. 1 may be applied to a multi-carrier aggregation scenario, and the terminal apparatus 101 may implement communication with the network device 102 based on a carrier aggregation technology.

The communication method provided by the embodiment of the present application will be described below with reference to the communication system shown in fig. 1.

It should be understood that the communication method provided in the embodiment of the present application may be used for indicating the following transmission scheme of the control channel, where the network device 102 may indicate the control channel for transmitting the target carrier by the target carrier to the terminal apparatus 101 according to the method shown in the present application, or indicate the control channel for transmitting the target carrier by the scheduled carrier to the terminal apparatus 101, or indicate the control channel for jointly transmitting the target carrier by the target carrier and the scheduled carrier to the terminal apparatus 101 (i.e., cross-carrier scheduling scheme). In fig. 2, the network device 102 indicates the cross-carrier scheduling scheme only as an example, but it should not be understood that the embodiment of the present application is only used for indicating the cross-carrier scheduling scheme, and the embodiment of the present application can also be used for indicating the other two transmission schemes.

As shown in fig. 2, the communication method provided in the embodiment of the present application includes the following steps:

s101: the network device 102 transmits the first information to the terminal apparatus 101.

Wherein the first information comprises information of a cross-carrier scheduling scheme.

It should be understood that the first information is described herein by taking the information including the target scheduling scheme as an example, but it should not be understood that the first information can only include the information of the cross-carrier scheduling scheme. In this embodiment, the first information may include at least one scheduling scheme in the scheduling schemes, and therefore, the cross-carrier scheduling scheme may be replaced with the scheduling scheme, and the scheduling scheme may include at least one of the following transmission schemes of the control channel of the target carrier: at least one control channel of the target carrier is carried by the target carrier and at least another control channel of the target carrier is carried by the scheduling carrier, or the control channel of the target carrier is transmitted only by the scheduling carrier (i.e. cross-carrier scheduling scheme), or the control channel of the target carrier is transmitted only by the target carrier.

Subsequently, for convenience of explanation, the scheduling scheme indicated by the first information may be referred to as a target scheduling scheme. The target scheduling scheme includes a cross-carrier scheduling scheme or other scheduling schemes exemplified above.

Accordingly, the terminal apparatus 101 receives the first information from the network device 102.

S102: the terminal apparatus 101 receives the control channel of the target carrier according to the above-described cross-carrier scheduling scheme.

For example, the terminal apparatus 101 may determine a carrier carrying the control channel of the target carrier according to the first information, and receive the control channel of the target carrier on the carrier.

By adopting the method, the cross-carrier scheduling of the control channel of the target carrier can be realized, so that the flexibility of user data scheduling is improved.

In the implementation of the above method, a plurality of scheduling schemes for the control channel of the target carrier may be predefined. The network device 102 may select a target scheduling scheme from the control channel scheduling schemes of the defined plurality of target carriers before performing step S101. In this application, the control channel cross-carrier scheduling scheme of each target carrier may also be referred to as a pattern (pattern).

Specifically, before step S101 is implemented, the network device 102 may select a target scheduling scheme from a plurality of scheduling schemes for a control channel of a target carrier.

The above plurality of scheduling schemes may include one or more of a scheme in which the control channel of the target carrier is transmitted only by the scheduling carrier, a cross-carrier scheduling scheme, or a scheme in which the control channel of the target carrier is transmitted only by the target carrier. The scheduling carrier and the target carrier are different carriers. The number of the above multiple scheduling schemes may be one or more. When the number of the cross-carrier scheduling schemes is multiple in the multiple scheduling schemes, control channels of target carriers transmitted by the target carriers in different cross-carrier scheduling schemes are different, or control channels of target carriers transmitted by the scheduling carriers in different cross-carrier scheduling schemes are different. Wherein, the cross-carrier scheduling scheme may include the target scheduling scheme involved in step S101.

Specifically, a control channel cross-carrier scheduling scheme for one or more target carriers may be predefined.

In one possible example, network device 102 may determine multiple cross-carrier scheduling schemes based on subcarrier spacing of multiple carriers for terminal apparatus 101.

Specifically, a specific cross-carrier scheduling scheme may be defined according to a subcarrier interval of a target carrier and/or a subcarrier interval of a scheduling carrier;

for example, if the ratio of the subcarrier spacing of the target carrier to the subcarrier spacing of the scheduling carrier is k, k can be determined²And (4) a cross-carrier scheduling scheme.

Optionally, in a cross-carrier scheduling scheme, a control channel of a target carrier transmitted by a target carrier may be used to schedule a data channel located at a first time domain position of the target carrier, and a control channel of the target carrier transmitted by a scheduling carrier may be used to schedule a data channel located at a second time domain position of the target carrier, where the first time domain position and the second time domain position are different time domain positions. For example, the sum of the data channel located at the first time domain position and the data channel located at the second time domain position may cover all data channels of the target carrier.

The following describes a specific manner of setting a plurality of cross-carrier scheduling schemes, taking as an example that the low-frequency carrier CC #1 accessed by the terminal apparatus 101 is 30 kilohertz (KHz) and the high-frequency carrier CC #2 accessed by the terminal apparatus 101 is 120 KHz.

As shown in fig. 3, the length of one slot (slot) of the above low-frequency carrier is equal to the length of four slots of the high-frequency carrier, for convenience of description, in this application, four slots of four high-frequency carriers corresponding to the slot of one low-frequency carrier may be respectively referred to as a slot1, a slot2, a slot3, and a slot4, a data channel located in the slot1 may be subsequently referred to as a data channel of the slot1, and the other slots are the same.

For example, when the low frequency carrier is a scheduling carrier of the terminal apparatus 101 and the high frequency carrier is a target carrier of the terminal apparatus 101, a plurality of control channel cross-carrier scheduling schemes shown in table 1 may be determined, and for convenience of description, the low frequency carrier accessed by the terminal apparatus 101 is denoted by CC #1, and the high frequency carrier accessed by the terminal apparatus 101 is denoted by CC # 2.

TABLE 1

As can be seen from table 1, the control channel cross-carrier scheduling scheme of the target carrier shown by the number #1 is a scheme in which the control channel of the target carrier is transmitted by the target carrier, where the target carrier is the high-frequency carrier CC # 2. Assuming that the control channel cross-carrier scheduling scheme indicated by the number #1 is the target scheduling scheme, the terminal apparatus 101 only needs to receive the control channel of CC #2 on CC # 2. The control channel cross-carrier scheduling scheme shown by number #1 may also be represented by fig. 4. As can be seen from fig. 4, the data channels of slot1, slot2, slot3 and slot4 of the high frequency carrier CC #2 are all scheduled by the control channel of the high frequency carrier CC # 2.

As can be seen from table 1, the control channel cross-carrier scheduling schemes of the target carriers shown in numbers #2 to #15 are cross-carrier scheduling schemes in which the control channels of the target carriers are jointly transmitted by the target carriers and the scheduling carriers. When the control channel cross-carrier scheduling scheme corresponding to any one of the numbers #2 to #15 is set as the target scheduling scheme, the terminal apparatus 101 needs to receive the control channel of the CC #2 on the CC #1 and the CC # 2.

The control channel cross-carrier scheduling scheme for the target carrier shown by number #2 may also be represented by fig. 5. As can be seen from fig. 5, the data channel of the slot4 (i.e. slot4 is the second time domain position) of the high frequency carrier CC #2 is scheduled by the control channel of the low frequency carrier CC #1, and the data channels of the slots 1 to 3 (i.e. slots 1 to 3 are the first time domain positions) of the high frequency carrier CC #2 are scheduled by the control channel of the low frequency carrier CC # 2.

The control channel cross-carrier scheduling scheme for the target carrier shown by number #3 may also be represented by fig. 6. As can be seen from fig. 6, the data channel of slot3(slot3, i.e. the second time domain position) of the high frequency carrier CC #2 is scheduled by the control channel of the low frequency carrier CC #1, and the data channels of

slots

1, 2 and 4 (

slots

1, 2 and 4, i.e. the first time domain positions) of the high frequency carrier CC #2 are scheduled by the control channel of the low frequency carrier CC # 2. The control channel cross-carrier scheduling schemes of the target carriers denoted by the numbers #4 to #15 are not described again, and the specific details are shown in table 1.

As can be seen from table 1, the cross-carrier scheduling scheme for the control channel of the target carrier shown by the number #16 is a scheme in which the control channel of the target carrier is transmitted by the scheduled carrier, where the target carrier is CC #2 and the scheduled carrier is CC # 1. Assuming that the control channel cross-carrier scheduling scheme indicated by the reference numeral #16 is the target scheduling scheme, the terminal apparatus 101 only needs to receive the control channel of CC #2 on CC # 1. The control channel cross-carrier scheduling scheme shown by number #16 may also be represented by fig. 7. As can be seen from fig. 7, the data channels of slot1, slot2, slot3 and slot4 of the high frequency carrier CC #2 are all scheduled by the control channel of the low frequency carrier CC # 1.

In addition, the configuration parameter values shown in table 1 may be used for the network device 102 to configure the control channel cross-carrier scheduling scheme to the terminal apparatus 101. The network device 102 may carry a 4-bit configuration parameter value in the configuration information sent to the terminal apparatus 101, so as to configure the terminal apparatus 101 to determine a carrier of a control channel carrying a target carrier according to a control channel cross-carrier scheduling scheme corresponding to the configuration parameter value. For example, when the configuration information carries a configuration parameter value "0001", it indicates that the target scheduling scheme is the control channel cross-carrier scheduling scheme numbered "# 2" in table 1.

For another example, a ratio j of a subcarrier spacing of a scheduled carrier to a subcarrier spacing of a target carrier may be determined²And (4) a cross-carrier scheduling scheme. For example, when the high frequency carrier CC #2 is a scheduling carrier of the terminal apparatus 101 and the low frequency carrier CC #1 is a target carrier of the terminal apparatus 101, a plurality of control channel cross-carrier scheduling schemes as shown in table 2 may be determined.

TABLE 2

As can be seen from table 2, the control channel cross-carrier scheduling scheme of the target carrier shown by the number #1 is a scheme in which the control channel of the target carrier is transmitted by the target carrier, where the target carrier is the high-frequency carrier CC # 1. Assuming the control channel cross-carrier scheduling scheme indicated by the number #1 as the target scheduling scheme, the terminal apparatus 101 only needs to receive the control channel of CC #1 on CC # 1.

As can be seen from table 2, the cross-carrier scheduling schemes for the control channels of the target carriers shown in numbers #2 to #16 are schemes in which the control channel of the target carrier is transmitted by the scheduled carrier, where the target carrier is CC #1 and the scheduled carrier is CC # 2. When the control channel cross-carrier scheduling scheme indicated by any one of the numbers #2 to #16 is set as the target scheduling scheme, the terminal apparatus 101 only needs to receive the control channel of CC #1 on CC # 2.

By adopting the multiple control channel cross-carrier scheduling scheme shown in table 2, a scheme in which the control channels of multiple target carriers are transmitted by the scheduling carrier can be set, as shown in the numbers #2 to #16, which can improve the flexibility in user data scheduling.

It should be understood that the setting manner of the control channel cross-carrier scheduling scheme of the target carrier shown in table 1 and/or table 2 is merely an example, and the present application does not limit the corresponding relationship between the specific meaning and the number of the control channel cross-carrier scheduling scheme of the target carrier shown in table 1 and/or table 2 and the value of the configuration parameter, in other words, the number and the value of the configuration parameter corresponding to the specific meaning of each control channel cross-carrier scheduling scheme in table 1 and/or table 2 may be adaptively changed according to the actual situation, without departing from the protection scope of the present application. It is not excluded in the present application that the ratio of the subcarrier intervals of the plurality of carriers accessed by the terminal apparatus 101 may be other values. Even if the ratio of the subcarrier intervals of the multiple carriers accessed by the terminal apparatus 101 has other possible values, the determination of the control channel cross-carrier scheduling scheme can be realized on the basis of the embodiment of the present application.

In another possible example, the network device 102 may determine multiple cross-carrier scheduling schemes for the control channel of the target carrier according to a format of control information carried by the control channel of the target carrier. Specifically, when the number of possible formats of the control information is l, l may be determined²And (4) a cross-carrier scheduling scheme.

In each cross-carrier scheduling scheme, the control channel of the target carrier transmitted by the scheduling carrier may carry control information in a first format, and the control channel of the target carrier transmitted by the target carrier may carry control information in a second format, where the first format and the second format are different control information formats. For example, the control information is DCI, and the formats of the control information may include formats 0_0, 0_1, 1_0, 1_1, 2_0, 2_1, 2_2, and 2_ 3.

Alternatively, an example may divide four formats of 0_0, 0_1, 1_0, and 1_1 into a first format and a second format. For example, when the first format is 0_0, the second format may be 0_1, 1_0, and 1_ 1.

When the format of the control information includes formats 0_0, 0_1, 1_0, and 1_1, a plurality of control channel cross-carrier scheduling schemes as shown in table 3 may be determined. Among them, the control channel cross-carrier scheduling schemes shown by the numbers #2 to #15 in table 3 are schemes for joint transmission of the target carrier and the scheduled carrier.

TABLE 3

As can be seen from table 3, the control channel cross-carrier scheduling scheme of the target carrier shown by the number #1 is a scheme in which the control channel of the target carrier is transmitted by the target carrier, where the target carrier is the high-frequency carrier CC # 2. Assuming that the control channel cross-carrier scheduling scheme indicated by the number #1 is the target scheduling scheme, the terminal apparatus 101 only needs to receive the control channel of CC #2 on CC # 2.

As can be seen from table 3, the control channel cross-carrier scheduling schemes of the target carriers shown in numbers #2 to #15 are cross-carrier scheduling schemes in which the control channels of the target carriers are jointly transmitted by the target carriers and the scheduling carriers. When the control channel cross-carrier scheduling scheme corresponding to any one of the numbers #2 to #15 is set as the target scheduling scheme, the terminal apparatus 101 needs to receive the control channel of the CC #2 on the CC #1 and the CC # 2.

Illustratively, in the control channel cross-carrier scheduling scheme of the target carrier shown by number #2, format 0_0 is the second format, and format 0_1, format 1_0, and format 1_1 are the first format. In the control channel cross-carrier scheduling scheme shown by number #3, format 0_1 is the second format, and format 0_0, format 1_0, and format 1_1 are the first format.

In addition, the control channel cross-carrier scheduling scheme of the target carrier shown by number #16 in table 3 is a scheme in which the control channel of the target carrier is transmitted by the scheduling carrier, where the target carrier is CC #2 and the scheduling carrier is CC # 1. Assuming that the control channel cross-carrier scheduling scheme indicated by the reference numeral #16 is the target scheduling scheme, the terminal apparatus 101 only needs to receive the control channel of CC #2 on CC # 1.

Optionally, one or more of the formats 0_1, 0_0, 1_0, and 1_1 may also be replaced by one or more of format 2_0, format 2_1, format 2_2, and format 2_ 3.

Alternatively, another example may divide eight formats, format 0_1, format 0_0, format 1_1, format 2_0, format 2_1, format 2_2, and format 2_3, into a first format and a second format. For example, when the first format is 0_0, the second format may be one or more of format 0_0, format 1_1, format 2_0, format 2_1, format 2_2, and format 2_ 3. It should be understood that the number, the value of the configuration parameter, and the specific meaning of the cross-carrier scheduling scheme in this example can be set by those skilled in the art with reference to table 3, and the setting manner thereof can be various, and the setting manner thereof is not limited in the present application. For the sake of saving the space of the application document, the setting manner of the exemplary cross-carrier scheduling scheme in the present application is not specifically illustrated.

It should be understood that the setting manner of the control channel cross-carrier scheduling scheme of the target carrier shown in table 3 is merely an example, and the present application does not limit the corresponding relationship between the specific meaning of the control channel cross-carrier scheduling scheme of the target carrier shown in table 3 and the number and the configuration parameter value, in other words, the number and the configuration parameter value corresponding to the specific meaning of each control channel cross-carrier scheduling scheme in table 3 may be changed. In addition, the present application does not exclude other possible formats for the control information. Even if the control information has other possible formats, the determination of the control channel cross-carrier scheduling scheme can be realized on the basis of the embodiment of the application.

In the implementation process of step S102, the first information may be used to indicate a target scheduling scheme in the multiple control channel cross-carrier scheduling schemes, so the terminal apparatus 101 may determine a carrier carrying the control channel of the target carrier according to the target scheduling scheme.

It should be understood that the communication method provided by the embodiment of the present application may be used for indication of a cross-carrier scheduling scheme and/or a non-cross-carrier scheduling scheme of a control channel, in other words, a target scheduling scheme includes, but is not limited to, a cross-carrier scheduling scheme. In particular, the first information may be used to indicate one or more of the following scheduling schemes: a scheme in which the control channel of the target carrier is transmitted only by the scheduling carrier (e.g., a scheduling scheme shown by index #16 in table 1 or table 3, or scheduling schemes shown by indexes #2- #16 in table 2), a cross-carrier scheduling scheme (e.g., a scheduling scheme shown by indexes #2- #15 in table 1 or table 3), or a scheme in which the control channel of the target carrier is transmitted only by the target carrier (e.g., a scheduling scheme shown by index #1 in table 1, table 2 and table 3). In other words, the first information in the above S102 step may be used to indicate one or more of a scheme in which the control channel of the target carrier is transmitted only by the scheduling carrier, a cross-carrier scheduling scheme, or a scheme in which the control channel of the target carrier is transmitted only by the target carrier.

In the implementation process of the present application, the first information may be carried in an RRC message, an MAC-CE message, or downlink control information of a control channel of the target carrier.

In the present application, a method for the network device 102 to transmit the first information to the terminal apparatus 101 will be described by way of example.

In a first mode, the network device sends an RRC message to the terminal device, and the first information is carried in the RRC message.

In this manner, the first information may include configuration information of the target scheduling scheme, so that direct indication of the target scheduling scheme may be achieved. Wherein, the configuration information of the target scheduling scheme may include at least one of an identifier of the target scheduling scheme, an identifier of the target carrier, or an identifier of the scheduling carrier.

For example, the first information may include an identification of the target scheduling scheme, which may be used to indicate the target scheduling scheme. For example, if the network device 102 and the terminal apparatus 101 both know multiple control channel cross-carrier scheduling schemes shown in table 1 or table 2, the identifier of the target scheduling scheme may include a number and/or a configuration parameter value corresponding to the target scheduling scheme, and the terminal apparatus 101 may perform table lookup according to the number and/or the configuration parameter value included in the first information to determine that the cross-carrier scheduling scheme corresponding to the number and/or the configuration parameter value is the target scheduling scheme. Among them, the terminal apparatus 101 may determine the multiple control channel cross-carrier scheduling schemes shown in table 1 or table 2 according to the indication of the network device 102 or according to a preconfigured manner.

Further, the identification of the target carrier may include an index of the target carrier. The identification of the scheduling carrier may include an index of the scheduling carrier. Optionally, the first information disclosed in the present application may include an index of the target carrier and an index of the scheduled carrier to indicate the scheduled carrier of the target carrier. For example, the first information may simultaneously carry indexes of CC #1 and CC #2, where an index of a preceding (or subsequent) carrier is an index of the target carrier, and an index of a subsequent (or preceding) carrier is an index of the scheduling carrier; alternatively, the first information may indicate which carrier index is the index of the target carrier and/or indicate which carrier index is the index of the scheduling carrier.

The above identification of the target carrier may also include an identification of a cell corresponding to the target carrier (the cell may be referred to as a scheduled cell in this application). The identifier of the Cell corresponding to the target carrier may include a Cell identifier (cif-In Scheduling Cell) of the scheduled Cell In the Scheduling Cell, and when the Scheduling carrier carries control channels of multiple target carriers, the identifier is used to identify which target carrier the current control channel is. Similarly, the identifier of the scheduling carrier may also include an identifier of a cell corresponding to the scheduling carrier (in this application, the cell may be referred to as a scheduling cell), and is not described herein again.

In addition, the configuration information of the target scheduling scheme may further include an identification of a BWP corresponding to the target scheduling scheme, and the terminal device may determine a scheduling carrier carrying a control channel according to the target scheduling scheme when the BWP is activated and receive the control channel of the target carrier on the carrier. For example, the first information may include an identification of the BWP to which the target scheduling scheme corresponds.

For example, the first information may include cross-carrier scheduling configuration (cross carrier scheduling config) information, and the cross-carrier scheduling configuration information may include a structure as shown in table 4 below. As shown in table 4, the cross-carrier scheduling configuration information may carry parameters such as a cross-carrier scheduling pattern identifier (crossscheduling pattern Id), a scheduling cell identifier (scheduling cell Id), a scheduled cell identifier (cif-scheduling cell), and a BWP Id corresponding to the target scheduling scheme.

TABLE 4

As shown in table 4, the Cross Scheduling pattern id parameter has a value range of 1-16, and each possible value corresponds to a Cross-carrier Scheduling scheme exemplified in table 1, table 2, or table 3. In addition, if the number of the control channel Cross-carrier Scheduling schemes is other than 16, the value range of the Cross Scheduling Pattern Id parameter may also be adjusted accordingly.

The Scheduling Cell Id parameter is an identifier of a Scheduling Cell, and a value of the Scheduling Cell Id parameter may be a positive integer, where the positive integer may be used to identify the Scheduling Cell, where the Scheduling Cell corresponds to a Scheduling carrier, that is, a parameter value of the Scheduling Cell Id may be used to identify the Scheduling carrier. The cif-In Scheduling Cell may be used to identify a scheduled Cell, where the scheduled Cell corresponds to a target carrier, that is, the cif-In Scheduling Cell may be used to identify the target carrier. The Scheduling Cell Id parameter and the cif-In Scheduling Cell parameter may be used to determine a target carrier of a control channel Cross-carrier Scheduling scheme indicated by the Cross Scheduling Pattern Id parameter, and a Scheduling carrier of a control channel carrying the target carrier.

In a specific example, taking the first information shown In table 3 for indicating one of the multiple Cross-carrier Scheduling schemes shown In table 1 as an example, if the parameter of the Cross Scheduling Pattern ID is 3, the parameter of the Scheduling Cell ID is 1 (assuming that the target carrier identified by the parameter is CC #1), the parameter of the cif-In Scheduling Cell is 2 (assuming that the target carrier identified by the parameter is CC #2), and the parameter of the BWP ID is 1 (assuming that the BWP identified by the parameter is BWP _1), then the first information may be used to indicate that when BWP _1 is activated, the terminal device 101 determines the carrier carrying the control channel of CC #2, which may be CC #2 or the Scheduling carrier identified by the parameter of the Scheduling Cell ID, according to the control channel Cross-carrier Scheduling scheme identified by #3 shown In table 1, namely CC # 1.

The first information shown in table 4 above may be carried in an RRC message sent by the network equipment 102 to the terminal apparatus 101. The RRC message is, for example, a serving cell configuration (serving cell config) message.

In addition, in the above manner, the network device 102 may further activate, through activation signaling, a target scheduling scheme configured for the terminal apparatus 101, so that the terminal apparatus 101 determines, according to the target scheduling scheme, a carrier carrying a control channel of the target carrier. If the activation signaling is not received, the terminal apparatus 101 does not determine the carrier of the control channel carrying the target carrier according to the target scheduling scheme, and at this time, the terminal apparatus 101 may receive the control channel of the target carrier at the target carrier by default or receive the control channel of the target carrier at the scheduling carrier by default. Illustratively, the activation signaling may be MAC-CE signaling, which may be used to explicitly or implicitly activate the target scheduling scheme. For example, the activation signaling may carry an activation indication, such that the configuration for the target carrier may be explicitly activated. Alternatively, the activation signaling may have a specific format, or carry specific information, for implicitly activating this configuration for the target carrier.

As shown in fig. 8, when the target scheduling scheme is explicitly activated through the MAC-CE message, one octet (Oct) of the MAC-CE message may be used to carry an identifier of a cell corresponding to the target carrier (e.g., the identifier is carried through 5 bits) and an identifier of the cross-carrier scheduling scheme to be activated (e.g., the identifier is carried through 3 bits). Additionally, in implementations, when the MAC-CE message indicates an identification of the target scheduling scheme (e.g., there is no corresponding cross-carrier scheduling scheme), terminal device 101 may default to receiving the control channel of the target carrier on the target carrier.

In the second method, the network device 102 sends a MAC-CE message to the terminal apparatus 101, and the first information is carried in the MAC-CE message. The first information may then be used to indicate the target scheduling scheme from a plurality of alternative cross-carrier scheduling schemes.

Wherein, the network device 102 may configure the terminal apparatus 101 with a plurality of alternative cross-carrier scheduling schemes through the second information (e.g. RRC message). The second information may include configuration information for each alternative cross-carrier scheduling scheme. The configuration information of the alternative cross-carrier scheduling scheme may include at least one of an identifier of the alternative cross-carrier scheduling scheme, an identifier of the alternative carrier, an identifier of a scheduled carrier, or an identifier of a BWP corresponding to the alternative cross-carrier scheduling scheme. The meaning and setting manner of the configuration information of each alternative cross-carrier scheduling scheme may refer to the introduction of the configuration information of the target scheduling scheme in the present application, and are not described herein again. In addition, the above multiple alternative cross-carrier scheduling schemes may also be defined by a protocol or determined in a preconfigured manner.

For example, as shown in table 5, the second information may include parameters such as a cross-carrier scheduling pattern identification list (crossscheduling pattern idilist), a scheduling cell ID, a cif-in scheduling cell, and a BWP ID corresponding to the alternative cross-carrier scheduling scheme.

Wherein the crossscheduling patternlidilist parameter may be used to indicate a plurality of alternative cross-carrier scheduling schemes. For example, the cross scheduling pattern idlist parameter values may include one or more positive integer values, where each value may be used to indicate one alternative cross-carrier scheduling scheme. Taking table 1 as an example, each positive integer value included in the parameter values of crossscheduling pattern idlist may correspond to one of the control channel cross-carrier scheduling schemes in table 1. For example, each positive integer takes the value of the number of one control channel cross-carrier scheduling scheme (for

number #

1, 1 is the number). The meaning and arrangement of the schedulingCellId, cif-InSchedulingCell and the BWP ID corresponding to each alternative cross-carrier scheduling scheme in table 4 can be referred to the description in table 4.

TABLE 5

According to the second information shown in table 5, when the target scheduling scheme is indicated from the multiple candidate cross-carrier scheduling schemes by the first information, the first information may carry an identifier of the target scheduling scheme, such as a number of the control channel cross-carrier scheduling scheme shown in table 1 or table 2. Or, the first information may carry a positive integer of the parameter values of the crossscheduling pattern idlist in the second information, where the positive integer is a positive integer corresponding to the target scheduling scheme among multiple positive integers of the parameter values of the crossscheduling pattern idlist. For example, the cross scheduling pattern idlist of the second information has parameter values of "2, 6, 9, and 8", and the first information may carry "8", so as to indicate that the alternative cross-carrier scheduling scheme corresponding to the cross scheduling pattern idlist having parameter value 8 is the target scheduling scheme.

In addition, the first information may also carry an index, where the index may be used to indicate that the target scheduling scheme is the nth cross-carrier scheduling scheme among the multiple alternative cross-carrier scheduling schemes indicated by the second information. For example, the cross scheduling pattern idlist of the second information has parameter values of "2, 6, 9, and 8", and when the first information carries an index "4", it indicates that the alternative cross-carrier scheduling scheme indicated by the 4 th value in the parameter values of the cross scheduling pattern idlist is the target scheduling scheme, that is, the alternative cross-carrier scheduling scheme corresponding to the parameter value 8 of the cross scheduling pattern idlist is the target scheduling scheme.

As shown in fig. 8, when a target scheduling scheme is indicated from a plurality of target scheduling schemes through a MAC-CE message, an identifier of a cell corresponding to a target carrier (for example, the identifier is carried through 5 bits) and an identifier of the target scheduling scheme (for example, the identifier of the cross-carrier scheduling scheme is carried through 3 bits) may be carried in an Oct of the MAC-CE message. In addition, in an implementation, when the identification of the cross-carrier scheduling scheme indicated by the MAC-CE message is invalid (e.g., the identification does not exist for the corresponding cross-carrier scheduling scheme), the terminal device 101 may receive the control channel of the target carrier on the target carrier by default.

In the third method, the network device 102 sends downlink control information to the terminal apparatus 101 to the network device 102, and the first information is carried in the downlink control information.

In one possible example, the network device 102 may transmit third information to the terminal apparatus 101, the third information indicating a plurality of alternative cross-carrier scheduling schemes, and at this time, the first information may be used to indicate a target scheduling scheme from the plurality of alternative cross-carrier scheduling schemes. Wherein the third information may include configuration information of each alternative cross-carrier scheduling scheme. The configuration information of the alternative cross-carrier scheduling scheme may include at least one of an identifier of the alternative cross-carrier scheduling scheme, an identifier of the alternative carrier, an identifier of a scheduled carrier, or an identifier of a BWP corresponding to the alternative cross-carrier scheduling scheme. The meaning and setting manner of the configuration information of the above alternative cross-carrier scheduling schemes can refer to the previous introduction in this application.

In this example, when the third information is carried in a MAC-CE message or an RRC message.

When the third information is carried in the MAC-CE message, the MAC-CE message may have a format as shown in fig. 9. The first Oct of the MAC-CE message may include an identifier of a cell corresponding to a target carrier (for example, a serving cell ID is carried by 5 bits) and an identifier of a first alternative cross-carrier scheduling scheme (for example, an identifier of the alternative cross-carrier scheduling scheme is carried by 3 bits), and then the first two bits of each Oct are set as reserved (reserved, R), and the other 6 bits respectively carry identifiers of two alternative cross-carrier scheduling schemes. In this scheme, the configuration information of the alternative cross-carrier scheduling scheme may be indicated to the terminal apparatus 101 by the network device 102 through other messages (e.g., RRC messages), or may be defined by a protocol or determined by the terminal apparatus 101 in a preconfigured manner.

When the third information is carried in the RRC message, the format of the RRC message may be as shown in table 5.

In the third mode, the downlink control information may carry an identifier of the target scheduling scheme, and is used to indicate the target scheduling scheme from a plurality of candidate cross-carrier scheduling schemes. Illustratively, the downlink control information may carry the number of the target scheduling scheme or the index of the target scheduling scheme in the multiple alternative cross-carrier scheduling schemes through 3 bits.

In a third further example, when the third information is carried in the RRC message, the third information may include an identifier of a BWP corresponding to each of the multiple alternative cross-carrier scheduling schemes, and at this time, the first information may be used to instruct the terminal device 101 to activate one BWP of the BWPs corresponding to each of the multiple alternative cross-carrier scheduling schemes, and after activating the BWP, the terminal device 101 may use the alternative cross-carrier scheduling scheme corresponding to the BWP as the target scheduling scheme. For example, the alternative cross-carrier scheduling schemes of the control channel of the target carrier, which are indicated to the terminal device 101 by the network device 102 through the RRC message, include alternative cross-carrier scheduling scheme #1, alternative cross-carrier scheduling scheme #2, and alternative cross-carrier scheduling scheme #3, where alternative cross-carrier scheduling scheme #1, alternative cross-carrier scheduling scheme #2, and alternative cross-carrier scheduling scheme #3 correspond to BWP #1, BWP #2, and BWP #3, respectively. If the network device 102 instructs the terminal apparatus 101 to activate BWP #1 through the downlink control information, the terminal apparatus 101 may receive the control channel of the target carrier according to the alternative cross-carrier scheduling scheme #1 corresponding to BWP #1 after BWP #1 is activated.

By adopting the method, the network device 102 can configure a plurality of alternative cross-carrier scheduling schemes to the terminal device 101 through RRC message, and the network device 102 activates the BWP activating instruction for multiplexing the downlink control information to configure the switching of the cross-carrier scheduling scheme of the control channel for switching the target carrier of the terminal device 101, thereby further improving the flexibility when scheduling the user data.

It should be further understood that the multiple alternative cross-carrier scheduling schemes in the above examples may also be defined by a protocol, or may be determined in a preconfigured manner.

It should be understood that the communication method provided by the embodiment of the present application may be used for indication of the following transmission scheme of the control channel: the scheduling scheme may include at least one of the following transmission schemes for the control channel of the target carrier: at least one control channel of the target carrier is carried by the target carrier and at least another control channel of the target carrier is carried by the scheduling carrier, or the control channel of the target carrier is transmitted only by the scheduling carrier (i.e. cross-carrier scheduling scheme), or the control channel of the target carrier is transmitted only by the target carrier. The above fig. 2, that is, in the related method embodiment, only the indication manner of the cross-carrier scheduling scheme is taken as an example to describe the flow of the embodiment of the present application, which should not be understood that the embodiment of the present application is only applied to the indication of the cross-carrier scheduling scheme. Specifically, the network device 102 may indicate, to the terminal apparatus 101, a control channel for transmitting the target carrier by the target carrier according to the method shown in the embodiment of the present application, or indicate, to the terminal apparatus 101, a control channel for transmitting the target carrier by the scheduled carrier, or indicate, to the terminal apparatus 101, a control channel for jointly transmitting the target carrier by the target carrier and the scheduled carrier (i.e., a cross-carrier scheduling scheme).

Based on the same inventive concept as the above method embodiments, the present application embodiment further provides a communication apparatus, which may have the functions of the network device or the terminal in the above method embodiments and may be configured to perform the steps performed by the network device or the terminal provided in the above method embodiments. The function can be realized by hardware, and can also be realized by software or hardware to execute corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible implementation manner, the communication apparatus 1000 shown in fig. 10 may serve as a network device according to the foregoing method embodiment, and perform the steps performed by the network device (e.g., the network device 102) in the foregoing method embodiment. As shown in fig. 10, the communication device 1000 may include a communication module 1001 and a processing module 1002, wherein the communication module 1001 and the processing module 1002 are coupled to each other. The communication module 1001 may be used to support the communication device 1000 for communication, and the communication module 1001 may have a wireless communication function, for example, capable of performing wireless communication with other communication devices through a wireless air interface. The processing module 1002 may be used to support the communication device 1000 to perform the processing actions in the above method embodiments, including but not limited to: generate information, messages transmitted by the communications module 1001, and/or demodulate and decode signals received by the communications module 1001, etc.

In performing the steps implemented by the network device, the communication module 1001 may be configured to transmit first information to the terminal apparatus, the first information including a cross-carrier scheduling scheme of a target carrier, the cross-carrier scheduling scheme including: at least one control channel of a target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on a scheduling carrier.

The processing module 1002 may be further configured to select the cross-carrier scheduling scheme from a plurality of cross-carrier scheduling schemes for a control channel of the target carrier. The plurality of cross-carrier scheduling schemes may include a scheme in which the control channel of the target carrier is transmitted by a scheduling carrier, a scheme in which the control channel of the target carrier is jointly transmitted by the target carrier and the scheduling carrier, and a scheme in which the control channel of the target carrier is transmitted by the target carrier. The scheme that the control channel of the target carrier is jointly transmitted by the target carrier and the scheduling carrier comprises the cross-carrier scheduling scheme.

Illustratively, the first control channel may be used to schedule a data channel for a first time slot and the second control channel may be used to schedule a data channel for a second time slot. The first time slot may be determined according to the subcarrier spacing of the target carrier and the subcarrier spacing of the scheduling carrier, and the second time slot may be determined according to the subcarrier spacing of the target carrier and the subcarrier spacing of the scheduling carrier. The processing module 1002 may be configured to determine the first time slot and the second time slot.

For example, the first control channel may be further configured to carry control information in a first format, and the second control channel may be further configured to carry control information in a second format. Wherein the first format may include at least one of the following formats: format 0_ 0; alternatively, format 0_ 1; alternatively, format 1_ 0; alternatively, format 1_ 1; alternatively, format 2_ 0; alternatively, format 2_ 1; alternatively, format 2_ 2; alternatively, format 2_ 3. The second format may include at least one of the following formats: format 0_ 0; alternatively, format 0_ 1; alternatively, format 1_ 0; alternatively, format 1_ 1; alternatively, format 2_ 0; alternatively, format 2_ 1; alternatively, format 2_ 2; alternatively, format 2_ 3. Wherein the first format is different from the second format.

The above first information may be carried in one or more of an RRC message, a MAC-CE message, or downlink control information.

The above first information may further include one or more of the following information: target carrier identification, scheduling carrier identification, target carrier BWP identification, scheduling carrier BWP identification, cross-carrier scheduling scheme and cross-carrier scheduling scheme list; wherein the cross-carrier scheduling scheme list comprises information of one or more alternative cross-carrier scheduling schemes.

The cross-carrier scheduling identifier may be used to indicate that the cross-carrier scheduling scheme is an nth cross-carrier scheduling scheme among a plurality of alternative cross-carrier scheduling schemes, where N is a positive integer, N is greater than or equal to 1 and less than or equal to N, and N is the number of the alternative cross-carrier scheduling schemes. The plurality of alternative cross-carrier scheduling schemes may be indicated to the terminal device by the network equipment, or defined by a protocol, or pre-configured to the terminal device.

It should be understood that the communication method provided by the embodiment of the present application may be used for indication of the following scheduling scheme transmission scheme of the control channel: the scheduling scheme may include at least one of the following transmission schemes for the control channel of the target carrier: at least one control channel of the target carrier is carried by the target carrier and at least another control channel of the target carrier is carried by the scheduling carrier, or the control channel of the target carrier is transmitted only by the scheduling carrier (i.e. cross-carrier scheduling scheme), or the control channel of the target carrier is transmitted only by the target carrier. Therefore, the cross-carrier scheduling scheme of the target carrier included in the first information in the above apparatus embodiment may also be replaced with one of the following schemes: the control channel of the target carrier is transmitted only by the scheduling carrier (i.e., the cross-carrier scheduling scheme), or the control channel of the target carrier is transmitted only by the target carrier. In the foregoing apparatus embodiment, the flow of the embodiment of the present application is described only by taking an indication manner of a cross-carrier scheduling scheme as an example, and it should not be understood that the embodiment of the present application is only applied to an indication of a cross-carrier scheduling scheme.

In another possible implementation manner, the communication apparatus provided in the embodiments of the present application may also be formed by hardware components, such as a processor, a memory, a transceiver, or the like.

For ease of understanding, fig. 11 illustrates the structure of the communication apparatus by taking a base station as an example. As shown in fig. 11, the communication device 1100 may include a transceiver 1101, a memory 1102, and a processor 1103. The transceiver 1101 may be used for communication by a communication device, such as for transmitting or receiving the first information. The memory 1102 is coupled to the processor 1103 and is operable to store programs and data necessary for the communication device 1100 to perform the various functions. The processor 1103 is configured to enable the communication device 1100 to perform corresponding functions of the above-described methods, which functions may be implemented by calling a program stored in the memory 1102.

In particular, the transceiver 1101 may be a wireless transceiver and may be configured to support the communication device 1100 for receiving and transmitting signaling and/or data over a wireless air interface. The transceiver 1101 may also be referred to as a transceiver unit or a communication unit, and the transceiver 1101 may include a radio frequency unit, such as a Remote Radio Unit (RRU), which may be used for transmission of radio frequency signals and conversion of the radio frequency signals to baseband signals, and one or more antennas, which may be used for radiation and reception of radio frequency signals. Optionally, the transceiver 1101 may only include the above radio frequency units, and then the communication device 1100 may include the transceiver 1101, the memory 1102, the processor 1103 and the antenna.

The memory 1102 and the processor 1103 may be integrated or separate. As shown in fig. 11, the memory 1102 and the processor 1103 may be integrated in the control unit 1110 of the communication apparatus 1100. Illustratively, the control unit 1110 may include a baseband unit (BBU) of an LTE base station, which may also be referred to as a Digital Unit (DU), or the control unit 1110 may include a Distributed Unit (DU) and/or a Centralized Unit (CU) in a base station under 5G and future radio access technologies. The control unit 1110 may be formed by one or more boards, where a plurality of boards may jointly support a radio access network of a single access system (e.g., an LTE network), and a plurality of boards may also respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The memory 1102 and processor 1103 may serve one or more boards. That is, the memory 1102 and the processor 1103 may be separately provided on each board. Multiple boards may share the same memory 1102 and processor 1103. In addition, each board may have necessary circuitry disposed thereon, e.g., to couple the memory 1102 and the processor 1103. The above transceivers 1101, processors 1103, and memories 1103 may be connected by a bus (bus) structure and/or other connection medium.

Based on the structure shown in fig. 11, when the communication device 1100 needs to transmit data, the processor 1103 may perform baseband processing on the data to be transmitted and then output a baseband signal to the rf unit, and the rf unit performs rf processing on the baseband signal and then transmits the rf signal in the form of electromagnetic waves through the antenna. When there is data to be transmitted to the communication device 1100, the rf unit receives an rf signal through the antenna, converts the rf signal into a baseband signal, and outputs the baseband signal to the processor 1103, and the processor 1103 converts the baseband signal into data and processes the data.

Based on the structure shown in fig. 11, the transceiver 1101 can be used to perform the above steps performed by the communication module 1001. And/or the processor 1103 may be used to call instructions in the memory 1102 to perform the steps performed by the processing module 1002 above.

In one possible implementation, the communication device 1200 shown in fig. 12 may serve as a terminal according to the above method embodiment, and perform the steps performed by the terminal (e.g., the terminal device 101) in the above method embodiment. As shown in fig. 12, the communication apparatus 1200 may include a communication module 1201 and a processing module 1202, which are coupled to each other, and the communication module 1201 and the processing module 1202 are coupled to each other. The communication module 1201 may be used to support the communication device 1200 for communication, and the communication module 1201 may have a wireless communication function, for example, to perform wireless communication with other communication devices through a wireless air interface. The processing module 1202 may be configured to enable the communication apparatus 1200 to perform the processing actions in the above method embodiments, including but not limited to: information, messages transmitted by the communication module 1201 are generated, and/or signals received by the communication module 1201 are demodulated and decoded, and so on.

In performing the steps performed by the terminal, the communication module 1201 may be configured to receive first information from the network device and receive a control channel of a target carrier according to the first information. Wherein the first information includes a target carrier control channel cross-carrier scheduling scheme, and the target carrier control channel cross-carrier scheduling scheme includes: at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on the scheduling carrier.

In another possible implementation manner, when the communication device is the terminal device 101, the structure thereof may be as shown in fig. 13. For easy understanding and illustration, in fig. 13, the terminal device takes a mobile phone as an example to illustrate the structure of the communication device. As shown in fig. 13, the communication device 1300 may include a processor 1301, a memory 1302, and a transceiver 1303.

The processor 1301 can be used to process communication protocols and communication data, control the terminal device, execute software programs, process data of the software programs, and the like. The memory 1302 may be used to store programs and data, and the processor 1301 may execute the method performed by the terminal apparatus 101 in the embodiment of the present application based on the programs.

The transceiver 1303 may include a radio frequency unit and an antenna. The radio frequency unit can be used for converting the baseband signal and the radio frequency signal and processing the radio frequency signal. The antenna may be used for transceiving radio frequency signals in the form of electromagnetic waves. In addition, only the rf unit may be regarded as the transceiver 1303, and the communication device 1300 may include the processor 1301, the memory 1302, the transceiver 1303 and the antenna.

In addition, the communication device 1300 may further include an input/output device 1304, such as a touch screen, a display screen, or a keyboard, which may be used to receive data input by a user and output data to the user. It should be noted that some kinds of communication devices may not have input/output devices.

Based on the structure shown in fig. 13, when the communication device 1300 needs to transmit data, the processor 1301 may perform baseband processing on the data to be transmitted, and output a baseband signal to the rf unit, and the rf unit performs rf processing on the baseband signal and then transmits the rf signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device 1300, the rf unit receives an rf signal through the antenna, converts the rf signal into a baseband signal, and outputs the baseband signal to the processor 1301, and the processor 1301 converts the baseband signal into data and processes the data.

Illustratively, the communication device 1300 may be configured to perform the above steps performed by the terminal device 101. In particular, the transceiver 1303 may be configured to perform the steps performed by the communication module 1201 above, and/or the processor 1301 may be configured to call instructions stored in the memory 1302 to perform the steps performed by the processing module 1202 above.

Based on the same concept as the foregoing embodiments, embodiments of the present application further provide a computer storage medium having stored thereon some instructions, which when invoked to execute, may cause a computer to perform the steps performed by the network device and/or the terminal apparatus in any one of the possible implementations of the foregoing method embodiments and method embodiments. In the embodiment of the present application, the readable storage medium is not limited, and may be, for example, a RAM (random-access memory), a ROM (read-only memory), and the like.

Based on the same concept as the method embodiments, embodiments of the present application further provide a computer program product, which, when executed by a computer, can enable the computer to perform the steps performed by the network device and/or the terminal in any one of the possible implementations of the method embodiments and the method embodiments.

Based on the same concept as the method embodiment, the embodiment of the present application further provides a communication system, which may include the network device and/or the terminal provided by the embodiment of the present application.

Illustratively, in the communication system, the network device may be configured to send first information to the terminal apparatus, where the first information includes a cross-carrier scheduling scheme of a target carrier, and the cross-carrier scheduling scheme includes: at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on the scheduling carrier. The terminal may be configured to receive first information from a network device and receive a control channel of a target carrier according to the first information.

Based on the same conception as the method embodiment, the embodiment of the application also provides a chip. The chip may include a processor, which may be coupled with the transceiver. The chip may be used for the first device or the second device to implement the functionality involved in the network device and/or the terminal apparatus in any one of the possible designs of the method embodiments, method embodiments described above.

In addition, the embodiment of the application also provides a chip system. The chip system may include the above chip, and may also include a chip and other discrete devices, for example, the chip system may include a chip, a memory, and a communication module.

It should be understood that the processors and processing modules referred to in the above embodiments may be general purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, which may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

The memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The transceiver and the communication module may be circuits, devices, communication interfaces, buses, software modules, wireless transceivers, or any other components that can realize information/data transceiving.

The above embodiments may be implemented in whole or in part by software, hardware (e.g., circuitry), firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (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, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

Claims

1. A method of communication, comprising:

the network equipment sends first information to a terminal device, wherein the first information comprises a cross-carrier scheduling scheme, and the cross-carrier scheduling scheme comprises the following steps: at least one control channel of a target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on a scheduling carrier.

2. The method of claim 1, further comprising:

the network equipment selects the cross-carrier scheduling scheme from a plurality of cross-carrier scheduling schemes of the control channel of the target carrier, wherein the plurality of cross-carrier scheduling schemes comprise a scheme that the control channel of the target carrier is transmitted by the scheduling carrier, a scheme that the control channel of the target carrier is jointly transmitted by the target carrier and the scheduling carrier, and a scheme that the control channel of the target carrier is transmitted by the target carrier.

3. The method of claim 1, wherein at least one control channel of the target carrier is carried on the target carrier and at least another control channel of the target carrier is carried on a scheduling carrier, comprising:

the first control channel of the target carrier is carried on the target carrier, and the second control channel of the target carrier is carried on the scheduling carrier.

4. The method of claim 3, wherein the first control channel is used to schedule a data channel for a first time slot, and wherein the second control channel is used to schedule a data channel for a second time slot; alternatively, the first and second electrodes may be,

the first control channel is used for carrying control information of a first format, and the second control channel is used for carrying control information of a second format.

5. The method according to claim 4, wherein the first time slot and/or the second time slot are determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier.

6. The method according to claim 4 or 5, wherein the first format comprises at least one of the following formats:

format 0_ 0; alternatively, the first and second electrodes may be,

format 0_ 1; alternatively, the first and second electrodes may be,

format 1_ 0; alternatively, the first and second electrodes may be,

format 1_ 1; alternatively, the first and second electrodes may be,

format 2_ 0; alternatively, the first and second electrodes may be,

format 2_ 1; alternatively, the first and second electrodes may be,

format 2_ 2; alternatively, the first and second electrodes may be,

format 2_ 3;

the second format includes at least one of:

format 0_ 0; alternatively, the first and second electrodes may be,

format 0_ 1; alternatively, the first and second electrodes may be,

format 1_ 0; alternatively, the first and second electrodes may be,

format 1_ 1; alternatively, the first and second electrodes may be,

format 2_ 0; alternatively, the first and second electrodes may be,

format 2_ 1; alternatively, the first and second electrodes may be,

format 2_ 2; alternatively, the first and second electrodes may be,

format 2_ 3.

7. The method according to any of claims 1-6, wherein the network device sends first information to the terminal device, comprising:

the network equipment sends an RRC message to the terminal device, and the first information is carried in the RRC message; and/or the presence of a gas in the gas,

the network equipment sends an MAC-CE message to the terminal device, and the first information is carried in the MAC-CE message; and/or the presence of a gas in the gas,

the network equipment sends downlink control information to the terminal device, and the first information is carried in the downlink control information.

8. The method of any of claims 1-7, wherein the first information further comprises one or more of:

target carrier identification, scheduling carrier identification, target carrier BWP identification, scheduling carrier BWP identification, cross-carrier scheduling scheme and cross-carrier scheduling scheme list;

wherein the cross-carrier scheduling scheme list comprises information of one or more alternative cross-carrier scheduling schemes.

9. The method of claim 8, wherein the cross-carrier scheduling scheme identifies an nth cross-carrier scheduling scheme of the one or more alternative cross-carrier scheduling schemes, wherein N is a positive integer, 1 ≦ N ≦ N, and N is the number of the one or more alternative cross-carrier scheduling schemes.

10. A method of communication, comprising:

a terminal device receives first information from a network device, wherein the first information comprises a cross-carrier scheduling scheme, and the cross-carrier scheduling scheme comprises the following steps: at least one control channel of a target carrier is borne on the target carrier and at least another control channel of the target carrier is borne on a scheduling carrier;

and the terminal device receives a control channel of a target carrier according to the first information.

11. The method of claim 10, wherein at least one control channel of the target carrier is carried by the target carrier and at least another control channel of the target carrier is carried by a scheduling carrier, comprising:

12. The method of claim 11, wherein the first control channel is used to schedule a data channel for a first time slot, and wherein the second control channel is used to schedule a data channel for a second time slot; alternatively, the first and second electrodes may be,

13. The method of claim 12, wherein the first time slot and/or the second time slot are determined according to a subcarrier spacing of the target carrier and a subcarrier spacing of the scheduling carrier.

14. The method according to claim 12 or 13, wherein the first format comprises at least one of the following formats:

format 0_ 0; alternatively, the first and second electrodes may be,

format 0_ 1; alternatively, the first and second electrodes may be,

format 1_ 0; alternatively, the first and second electrodes may be,

format 1_ 1; alternatively, the first and second electrodes may be,

format 2_ 0; alternatively, the first and second electrodes may be,

format 2_ 1; alternatively, the first and second electrodes may be,

format 2_ 2; alternatively, the first and second electrodes may be,

format 2_ 3;

the second format includes at least one of:

format 0_ 0; alternatively, the first and second electrodes may be,

format 0_ 1; alternatively, the first and second electrodes may be,

format 1_ 0; alternatively, the first and second electrodes may be,

format 1_ 1; alternatively, the first and second electrodes may be,

format 2_ 0; alternatively, the first and second electrodes may be,

format 2_ 1; alternatively, the first and second electrodes may be,

format 2_ 2; alternatively, the first and second electrodes may be,

format 2_ 3.

15. The method according to any of claims 10-14, wherein the first information is carried in at least one of the following messages:

an RRC message;

a MAC-CE message;

and downlink control information.

16. The method of any of claims 10-15, wherein the first information further comprises one or more of:

17. The method of claim 16, wherein the cross-carrier scheduling scheme identifies an nth cross-carrier scheduling scheme of the one or more alternative cross-carrier scheduling schemes, wherein N is a positive integer, 1 ≦ N ≦ N, and N is the number of the one or more alternative cross-carrier scheduling schemes.

18. A communications apparatus, comprising:

a communication module for performing communication-related operations in the method of any one of claims 1-9;

a processing module for performing processing-related operations in the method of any one of claims 1-9.

19. A communications apparatus, comprising:

a communication module for performing communication-related operations in the method of any one of claims 10-17;

a processing module for performing processing-related operations in the method of any one of claims 10-17.

20. A communications apparatus, comprising:

a memory to store instructions;

a processor configured to retrieve and execute the instructions from the memory, such that the communication device performs the method of any of claims 1-9.

21. A communications apparatus, comprising:

a memory to store instructions;

a processor configured to retrieve and execute the instructions from the memory, such that the communication device performs the method of any of claims 10-17.

22. A communication system comprising a communication device according to claim 18 or 20 and comprising a communication device according to claim 19 or 21.

23. A computer storage medium having instructions stored therein, which when invoked for execution on a computer, cause the computer to perform the method of any one of claims 1-9, or cause the computer to perform the method of any one of claims 10-17.

24. A computer program product, characterized in that, when run on a computer, causes the computer to perform the method of any of claims 1-9, or causes the computer to perform the method of any of claims 10-17.

25. A chip comprising a processor coupled with a memory, the chip being configured to read and execute a program stored in the memory to perform the method of any of claims 1-9 or to perform the method of any of claims 10-17.