RU2782443C1 - Method and apparatus for detecting the physical downlink control channel - Google Patents

Abstract

FIELD: communication.

SUBSTANCE: to realise the technical result, the following is provided in the terminal device: detecting a physical downlink control channel (PDCCH) according to the first set of control resources, wherein the first set of control resources constitutes a set of control resources on the first BWP containing N sub-bands, wherein the first set of control resources is located on K sub-bands from the N sub-bands, wherein N and K are positive integers, and N≥K≥2; if it is determined that the sub-bands corresponding to the first set of control resources contain a non-communication sub-band, not detecting a PDCCH on the non-communication sub-band; and/or detecting a PDCCH according to the second set of control resources, wherein the sub-bands corresponding to the second set of control resources contain P sub-bands for communication in the K sub-bands, wherein P is a positive integer, and 1≤P<K, and the second set of control resources contains a resource from the first set of control resources located on the P sub-bands.

EFFECT: possibility of transmitting the control channel over multiple LBT sub-bands contained in the BWP.

8 cl, 17 dwg

Description

FIELD OF TECHNOLOGY TO WHICH THE INVENTION RELATES

[1] Embodiments of the present application relate to communication technologies and, in particular, to a method and apparatus for discovering a physical downlink control channel (PDCCH).

Background of the invention

[2] Unlicensed spectrum is spectrum that can be used to communicate with radio equipment distributed across countries and regions. This spectrum is generally considered to be shared spectrum, meaning that communication devices in different communication systems can use the spectrum as long as they comply with the regulations set by countries or regions regarding the spectrum, and there is no need to request an exclusive spectrum license from the state. In addition, communication devices communicating over unlicensed spectrum must follow the Listen Before Talk (LBT) principle, i.e., before a communication device transmits a signal on an unlicensed spectrum channel, it must listen to that channel, and may transmit a signal over channel only when the result of listening to the channel is that the channel is free.

[3] In the new radio-based unlicensed spectrum access (NR-U) system, the spectrum used by the communication device is the unlicensed spectrum. In addition, the bandwidth of the NR-U system is relatively large, for example, the system bandwidth is 40 MHz, 60 MHz, 80 MHz, and so on. Accordingly, the bandwidth corresponding to the portion of the bandwidth (BWP) configured by the system for the terminal may also be 40 MHz, 60 MHz, 80 MHz, etc. Since the bandwidth of the LBT subband on the unlicensed spectrum is 20 MHz, one BWP can contain multiple LBT subbands.

[4] Therefore, when the BWP contains multiple LBT sub-bands, the actual problem to be solved is how to transmit the control channel over the multiple LBT sub-bands contained in the BWP.

SHORT DESCRIPTION

[5] In the embodiments of the present application, a control channel transmission method and apparatus and a data carrier are provided for solving the problem of how to transmit the first control channel over multiple subbands.

[6] In a first aspect, in an embodiment of the present application, a control channel transmission method applied to a network device can be provided, and the method includes:

mapping of the first control channel to S first transmission blocks contained in the first control resource set, wherein the first control resource set is a control resource set on the first part of the BWP bandwidth, where the first BWP contains N subbands, the first control resource set is located on at least one subband of N subbands, the first transmission block is the smallest block to transmit the control channel, with S and N being positive integers, S≥1 and N≥2;

transmitting the first control channel to the terminal device.

[7] In a second aspect, in an embodiment of the present application, a control channel transmission method applied to a terminal apparatus can be provided, and the method includes:

receiving a first control channel transmitted by a network device, wherein the first control channel is mapped to S first transmission blocks contained in the first control resource set, wherein the first control resource set is a control resource set on the first part of the BWP bandwidth, wherein the first BWP contains N subbands, the first set of control resources is located on at least one subband of N subbands, the first transmission block is the smallest block to transmit the control channel, while S and N are positive integers, S≥1 and N≥2.

[8] In a third aspect, in an embodiment of the present application, a control channel transmission method applied to a terminal device can be provided, and the method includes:

receiving a control channel according to a first control resource set, wherein the first control resource set is a control resource set on a first portion of a BWP bandwidth, wherein the first BWP comprises N subbands, the first control resource set is located on K subbands of N subbands, where N and K are positive integers, and N≥K≥2;

receiving a control channel according to a second control resource set when determining that a subband for communication in the first BWP does not contain at least one subband of K subbands, wherein the second control resource set is located on P subbands of K subbands, where P is a positive integer number, and 1≤P<K.

[9] In a fourth aspect, in an embodiment of the present application, a network device can be provided, comprising:

a processing module configured to map the first control channel to S first transmission blocks contained in the first control resource set, wherein the first control resource set is a control resource set on the first part of the BWP bandwidth, the first BWP contains N subbands, the first the control resource set is located on at least one subband of N subbands, the first transmission block is the smallest block to transmit the control channel, S and N being positive integers, S≥1 and N≥2;

a transmission module configured to transmit the first control channel to the terminal device.

[10] In a fifth aspect, in an embodiment of the present application, a terminal device may be provided, comprising:

a receiving module configured to receive a first control channel transmitted by the network device, wherein the first control channel is mapped to S first transmission blocks contained in the first control resource set, wherein the first control resource set is a control resource set on the first part of the bandwidth BWP, where the first BWP contains N subbands, the first set of control resources is located on at least one subband of N subbands, the first transmission block is the smallest block to transmit the control channel, while S and N are positive integers, S≥1 and N≥2.

[11] In a sixth aspect, in an embodiment of the present application, a terminal device can be provided, comprising:

a receiving module configured to receive a control channel according to a first control resource set, wherein the first control resource set is a control resource set on a first portion of a BWP bandwidth, wherein the first BWP comprises N subbands, the first control resource set is located on K subbands of N subbands, with N and K being positive integers and N≥K≥2;

a processing module, configured to determine that the subband for communication in the first BWP does not contain at least one subband of the K subbands;

wherein the receiving module is further configured to: when the processing module determines that a subband for communication in the first BWP does not contain at least one subband of the K subbands, receiving a control channel according to the second control resource set, wherein the second control resource set is located on P subbands of K subbands, where P is a positive integer, and 1≤P<K.

[12] In a seventh aspect, in an embodiment of the present application, a network device can be provided, comprising:

a processor, a storage device and an interface for communication with a terminal device;

wherein the storage device stores instructions for execution by the computer;

wherein the processor executes computer-executable instructions stored in the memory, which causes the processor to execute the control channel transmission method as described in the first aspect.

[13] In an eighth aspect, in an embodiment of the present application, a terminal device can be provided, comprising:

a processor, a storage device, and an interface for communication with a network device;

wherein the storage device stores instructions for execution by the computer;

wherein the processor executes computer-executable instructions stored in the memory, which causes the processor to execute the control channel transmission method as described in the second aspect or the third aspect.

[14] In a ninth aspect, in an embodiment of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores instructions for execution by the computer, and instructions for execution by the computer when executed by the processor are for implementing the control channel transmission method as described in the first aspect.

[15] In a tenth aspect, in an embodiment of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores instructions for execution by a computer, and instructions for execution by a computer when executed by a processor are for implementing a control channel transmission method as described in the second aspect or third aspect.

[16] In an eleventh aspect, an embodiment of the present application provides a program that, when executed by a processor, is configured to execute the control channel transmission method described in the first aspect above.

[17] In a twelfth aspect, an embodiment of the present application also provides a program that, when executed by a processor, is for executing the control channel transmission method described in the second or third aspect above.

[18] Optionally, the above processor may be a chip.

[19] In a thirteenth aspect, an embodiment of the present application provides a computer program product containing program instructions, and the program instructions are for implementing the control channel transmission method described in the first aspect.

[20] In a fourteenth aspect, an embodiment of the present application provides a computer program product containing program instructions, and the program instructions are for implementing the control channel transmission method described in the second aspect or the third aspect.

[21] In a fifteenth aspect, an embodiment of the present application provides a chip comprising: a processing module and a communication interface, wherein the processing module can execute the control channel transmission method described in the first aspect.

[22] In addition, the chip also includes a storage module (such as a storage device), wherein the storage module is configured to store instructions, the processing module is configured to execute instructions stored in the storage module, and execute instructions stored in the storage module, causes the processing unit to execute the control channel transmission method described in the first aspect.

[23] In a sixteenth aspect, an embodiment of the present application provides a chip comprising: a processing unit and a communication interface, and the processing unit can execute the control channel transmission method described in the second or third aspect.

[24] In addition, the chip also includes a storage module (such as a storage device), wherein the storage module is configured to store instructions, the processing module is configured to execute instructions stored in the storage module, and execute instructions stored in the storage module, causes the processing module to execute the control channel transmission method described in the second or third aspect.

[25] In the control channel transmission method and apparatus and storage medium according to the embodiments of the present application, the network device maps the first control channel to at least one first transmission block in the control resource set on the first portion of the BWP bandwidth, wherein the first transmission block is the smallest unit for transmitting a control channel, the first bandwidth portion of the BWP comprises a plurality of subbands, wherein at least one of the plurality of subbands is implemented with a control resource, and the control resource performed on at least one of the plurality of subbands forms a set of control resources on the BWP so that the network device can map the first control channel in the first transmission block in the control resource on at least one subband, and then transmit the first control channel to the terminal device via the first transmission block in the control resource on at least one subband, thereby deciding problem, concluding I am wondering how to transmit the first control channel over several subbands.

BRIEF DESCRIPTION OF THE DRAWINGS

[26] For a clearer description of the technical solutions in the embodiments of the present application or the prior art, the following is a summary of the drawings that should be used in describing the embodiments or the prior art. Obviously, the drawings presented in the following description represent some embodiments of the present application. For those skilled in the art, other graphics can be derived from these graphics without creative work.

[27] FIG. 1 is a schematic representation of a communication system according to the present application;

[28] in FIG. 2 is a schematic representation of a control resource according to the present application;

[29] in FIG. 3 is a schematic representation of another control resource according to the present application;

[30] in FIG. 4 is a schematic representation of another control resource according to the present application;

[31] in FIG. 5 is a schematic representation of the REG group numbering according to the present application;

[32] in FIG. 6 is a schematic representation of the mapping of PDCCH to CCE according to the present application;

[33] in FIG. 7 is a schematic representation of another PDCCH mapping for CCE according to the present application;

[34] in FIG. 8 is a schematic representation of another PDCCH to CCE mapping according to the present application;

[35] in FIG. 9 is a schematic representation of another PDCCH to CCE mapping according to the present application;

[36] in FIG. 10 is a schematic representation of yet another PDCCH to CCE mapping according to the present application;

[37] in FIG. 11 is a schematic representation of yet another PDCCH to CCE mapping according to the present application;

[38] in FIG. 12 is a schematic representation of the PDCCH mapping in subbands according to the present application;

[39] in FIG. 13 is a schematic representation of the downlink transmission capability of a network device according to the present application;

[40] in FIG. 14 is a schematic structural representation of a network device according to the present application;

[41] in FIG. 15 is another schematic structural representation of a terminal device according to the present application;

[42] in FIG. 16 is another schematic structural representation of a terminal device according to the present application;

[43] in FIG. 17 is another schematic structural representation of a network device according to the present application.

DESCRIPTION OF EMBODIMENTS

[44] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of the present application.

[45] The terms "first", "second", etc. in the description, claims, and aforementioned drawings of the embodiments of the present application are used to distinguish between similar objects, and are not necessarily used to describe a particular sequence or sequential order. . It should be understood that the data thus used can be exchanged under appropriate circumstances, so that the embodiments of the present application described herein, for example, may be implemented in a sequence different from those depicted or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive indications. For example, a process, method, system, product, or device that includes a number of steps or blocks is not necessarily limited to what is explicitly listed. Instead, they may include other steps or blocks that are not explicitly listed or are specific to the process, method, product, or device.

[46] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of the present application.

[47] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system for mobile communications (GSM), code division multiple access (CDMA) system, wideband code division multiple access (WCDMA), system General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Advanced Long Term Evolution (LTE-A), New Radio System (NR), NR System Evolution System, LTE-based Unlicensed Spectrum Access System (LTE-U), NR-based Unlicensed Spectrum Access System (NR-U), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability Communication System for microwave access (WiMAX), wireless local area networks (WLAN), WiFi wireless access system, next generation communication system, etc. other communication systems, etc.

[48] In general terms, conventional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technologies, mobile communication systems will not only support traditional communication, but also support, for example, device-to-device communication (D2D), machine-to-car communication (M2M), machine-type communication (MTC) and vehicle-to-vehicle (V2V) communication, and etc. Embodiments of the present application may also apply to these communication systems.

[49] As an example, the communication system 100 used in the embodiment of the present application is as shown in FIG. 1. Communication system 100 may include a network device 110, and network device 110 may be a device that communicates with terminal device 120 (or called a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located within the coverage area. Optionally, the network device 110 may be a base station (BTS) in a GSM or CDMA system, or a base station (NB) in a WCDMA system, or an evolutionary base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a radio controller in a network. cloud radio access (CRAN), or network device can be a mobile switching center, relay station, access point, vehicle-mounted device, wearable device, hub, switch, bridge, router, network-side device in a 5G network, or network device in the future evolutionary Public Land Mobile Network (PLMN).

[50] Communication system 100 also includes at least one terminal device 120 located within the coverage area of network device 110. As used herein, "terminal device" includes, but is not limited to, a connection via wired lines, such as a connection via telephone networks. public domain (PSTN), digital subscriber line (DSL), digital cable, direct cable; and/or other data connection/network; and/or via a wireless interface, such as cellular networks, wireless local area networks (WLANs), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and/or other terminal device configured to receive/transmit communication signals; and/or Internet of Things (IoT) equipment. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communications terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite phones or cellular phones; personal communication system (PCS) terminals that can integrate cellular radiotelephones with data processing, facsimile, and data functionality; PDAs, which may include cordless phones, pagers, Internet/Intranet access, web browsers, notepads, calendars, and/or global positioning system (GPS) receivers; and conventional portable computers and/or pocket receivers or other electronic devices containing radiotelephone transceivers. A terminal device may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile console, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication equipment, a user agent, or a user device. The access terminal may be a cellular phone, a cordless phone, a session establishment protocol (SIP) phone, a wireless subscriber access station (WLL), a personal digital assistant (PDA), a wireless capable handheld device, a computing device, or other processing devices connected to the wireless modem, vehicle device, wearable device, terminal device in 5G network or terminal device in the future evolutionary PLMN, etc.

[51] Optionally, device-to-device (D2D) communication may be between terminal devices 120.

[52] Optionally, a 5G system or 5G network may also be referred to as a New Radio (NR) system or an NR network.

[53] FIG. 1 illustratively shows one network device and two terminal devices. Optionally, communication system 100 may include multiple network devices, and the coverage area of each network device may include a different number of terminal devices, which is not limited in an embodiment of the present application.

[54] FIG. 1, the network device may be an access device, for example, it may be an access device in the NR-U system, such as a base station (next generation Node B, gNB) or a small station of 5G new radio (NR) access technology, a micro station , and can also be a relay station, transmitting and receiving point (TRP), road side unit (RSU), etc.

[55] A terminal device may also be referred to as a mobile terminal, user equipment (UE for short), access terminal, user unit, user station, mobile station, mobile console, user terminal, terminal, wireless communication device, user agent, or user device. In particular, it may be a smartphone, a cellular phone, a cordless phone, a personal digital assistant (PDA) device, a handheld device with a wireless function or other processing devices connected to a wireless modem, a device in a vehicle, a wearable device, etc. In embodiments of the present application, the terminal device has an interface for communicating with a network device (eg, a cellular network).

[56] Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management node, which are not limited in the embodiment of the present application.

[57] It should be understood that a device with a network/system communication function in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1, by way of example, the communication device may include a network device 110 and a terminal device 120 that have a communication function, and the network device 110 and the terminal device 120 may be specific devices described above that will not be re-described herein. The communication device may also include other devices in the communication system 100, such as a network controller, a mobility management node, and other network entities, which are not limited in an embodiment of the present application.

[58] It should be understood that the terms "system" and "network" are often used interchangeably herein. The expression "and/or" in this document is only an association relationship describing related objects, which means that there can be three types of relationship, for example, A and/or B can mean that there are three cases: A exists separately, exists as A and B, and B exists separately. In addition, the symbol "/" used in this document as a whole indicates that the related objects before and after this symbol are related by the "or" relationship.

[59] The method in embodiments of the present application may be applied to communications in unlicensed spectrum, and may also be applied to other communications scenarios, such as a communications scenario in licensed spectrum.

[60] Unlicensed spectrum is the spectrum allocated by countries and regions that is available for communication using radio devices. Spectrum can be considered as shared spectrum, meaning that communication devices in different communication systems can use the spectrum, subject to the regulations set by countries or regions regarding the spectrum, without requiring an exclusive spectrum license from the state. To ensure comfortable coexistence on the unlicensed spectrum of various communication systems that use this spectrum for wireless communication, communication devices may follow the Listen Before Talk (LBT) principle when communicating over the unlicensed spectrum, i.e. the communication devices must first perform a channel listening (or called channel detection) before transmitting a signal over an unlicensed spectrum channel. The communication device can only perform signaling when the result of the channel detection is that the channel is free, or in other words, the communication device has acquired the right to use the channel. If the result of recognizing a communication device channel on the unlicensed spectrum is that the channel is busy, the communication device cannot transmit a signal, or in other words, the communication device does not acquire the right to use the channel. Optionally, the LBT bandwidth is 20 MHz or an integer multiple of 20 MHz.

[61] The control channel transmission method provided in the present application includes: mapping by a network device of the first control channel into S first transmission blocks contained in the first control resource set, wherein the first control resource set is the control resource set on the first part of the BWP bandwidth , wherein the first BWP contains N subbands, the first set of control resources is located on at least one subband of N subbands, the first transmission block is the smallest block for transmission of the control channel, while S and N are positive integers, S≥1, N≥2; and transmitting, by the network device, a first control channel to the terminal device.

[62] It should be understood that the subband may be an LBT subband or a subband separated in other ways, which is not limited in the present application.

[63] In this embodiment, the first control channel, in particular, may be a physical downlink control channel (PDCCH) transmitted by the network device to the terminal device. The first portion of the BWP bandwidth may be a BWP configured by the system for the terminal device. The BWP contains multiple subbands, and the number of subbands contained in the BWP is denoted as N, where N is a positive integer and N≥2. Taking N=4 as an example, as shown in FIG. 2, the BWP configured by the system for the terminal device contains 4 subbands, such as subband 0, subband 1, subband 2, and subband 3. Optionally, each of subband 0, subband 1, subband 2, and subband 3 is an LBT subband. At least one of the four subbands may be executed with a control resource, and the number of control resources performed on each subband is not limited. Here, the set of control resources contained in the BWP may be referred to as the first set of control resources, and the first set of control resources may be located on at least one of the four subbands.

[64] As shown in FIG. 2, each subband is configured with a control resource, and control resource sets 0-3 are designated as the first control resource set. Alternatively, the first control resource set may specifically be a control resource set (CORESET). As shown in FIG. 3, the network device configures the terminal device with control resource set 0, and control resource set 0 has a control resource on each subband. Alternatively, control resource set 0 may also have corresponding control resources in some of the 4 subbands. For example, control resource set 0 may have control resource on subband 0 and no control resource on other subbands. As another example, control resource set 0 may have control resources on subband 0 and subband 1, and no control resources on other subbands. As shown in FIG. 2 or fig. 3, optionally, the control resource on each subband may comprise an integer number of first transmission blocks, and the first transmission element in particular may be a control channel element (CCE), and the CCE is the smallest block for PDCCH transmission. In this case, the control resource on each subband may be designated as a subset of control resources, that is, the first control resource set is formed by subsets of control resources, and since there cannot be a subset of control resources on each subband, the number of subsets of control resources contained in the first set of control resources , less than or equal to the number of subbands contained in the BWP. Here, the number of control resource subsets contained in the first control resource set may be denoted as K, where K is a positive integer and K≤N. Each control resource subset of the K control resource subsets may contain an integer number of CCEs. In this case, the number of CCEs contained in each control resource subset is denoted as R.

[65] When K is less than N, this means that some of the N subbands do not have subsets of control resources. For example, K=3, N=4, which indicates that only 3 out of 4 subbands have control resource subsets, and one subband does not have a control resource subset. For example, subband 0, subband 1, and subband 2 respectively have a subset of control resources, and subband 3 does not have a subset of control resources. When K is N, this means that each of the N subbands has a subset of control resources.

[66] Optionally, the size of the subset of control resources on each subband is the same. Taking K=4, N=4, R=2 as an example, each of the 4 subbands has a subset of control resources, and the subset of control resources in each subband contains 2 CCEs, then the subsets of control resources in 4 subbands contain a total of 8 CCEs, then there is a first control resource set contains 8 CCEs. The network device may map the PDCCH to the 8 CCEs, or the network device may map the PDCCH to some of the 8 CCEs.

[67] Optionally, the size of the subset of control resources on each subband is different. Taking K=4 and N=4 as an example, each of the 4 subbands has a subset of control resources, where the subsets of control resources in subband 0 and subband 1 contain 6 CCEs, respectively, and the subsets of control resources in subband 2 and subband 3 contain 4 CCE respectively. In some embodiments, the size of the subset of control resources on each subband may be different. The control channel transmission method provided in the present application is not only applicable in scenarios in which the size of the control resource subset on each subband is the same, but also applicable in scenarios in which the size of the control resource subset on each subband is different. In the following embodiments, subsets of control resources on each subband having the same size are taken as an example for illustrative description. Optionally, when the size of the control resource subset on each subband is different, in the process of the CCE or REG mapping method provided in the embodiments, when the control resource subset on the subband does not contain unmapped CCEs or REG, the subband mapping may be skipped.

[68] In the control channel transmission method provided in this embodiment, the network device maps the first control channel to at least one first transmission block in the control resource set on the first part of the BWP bandwidth, the first transmission block being the smallest block for control channel transmission, the first part of the bandwidth of the BWP comprises multiple subbands, wherein at least one subband of the multiple subbands is configured with a control resource, and the control resource configured on at least one of the multiple subbands forms a set of control resources on the BWP, so that the network device can map the first control channel in the first transmission block in the control resource on at least one subband, and therefore transmit the first control channel to the terminal device through the first transmission block in the control resource on at least one subband, thereby deciding the problem that how to transmit the first control channel over multiple subbands.

[69] In general, the CCE contains 6 Resource Element Groups (REGs), and the REG occupies 12 subcarriers in the frequency domain and 1 symbol in the time domain. One REG can contain 12 resource elements (RE). It can be understood that a RE in one REG can be used to transmit a PDCCH or a demodulation reference signal (DMRS).

[70] Taking R=2 as an example, that is, each control resource subset contains 2 CCEs, and each control resource subset contains 12 REGs, then a corresponding mapping relationship between CCEs and REGs will occur in the same control resource subset. Before introducing the mapping relation between CCE and REG, we first introduce the concept of a resource block group. The resource block group may be a REG group. One REG group contains L consecutive REGs, where L is a positive integer and L≤6. Optionally, L may be a top-configured parameter and the value of L is 2, 3, or 6.

[71] Optionally, if there is a non-interleaved mapping of CCEs to REGs, L=6, one CCE corresponds to one REG group.

[72] Optionally, if interleaved mapping of CCEs to REGs occurs and the control resource subset contains 1 symbol in the time domain, L=2 or 6, one CCE corresponds to 3 or 1 REGs.

[73] Optionally, if there is an interleaved mapping of CCEs to REGs and the control resource subset contains 2 symbols in the time domain, L=2 or 6, one CCE corresponds to 3 or 1 REGs.

[74] Optionally, if there is an interleaved mapping of CCEs to REGs and the control resource subset contains 3 symbols in the time domain, L=3 or 6, one CCE corresponds to 2 or 1 REGs.

[75] Optionally, for interleaved mapping of CCE to REG, the interleaver is a REG group.

[76] The mapping relationship between CCEs and REGs and the mapping process of PDCCH to CCE will be described in detail below in conjunction with specific embodiments.

[77] Taking K=4, N=4, and R=2 as an example, as shown in FIG. 4, the first control resource set contains 4 control resource subsets, for example, control resource subsets 0-3. Each control resource subset contains 12 physical resource blocks (PRBs) in the frequency domain, and 1 symbol in the time domain, eg, one orthogonal frequency division multiplexing (OFDM) symbol. Each small grating in Fig. 4 represents a resource element group (REG), for example 44 indicates any REG. Assuming that two REGs form a REG group as shown in FIG. 4, 45 represents any REG group. Optionally, one CCE contains 6 REGs, then one CCE contains 3 REGs, each control resource subset contains 2 CCEs, and 2 CCEs contain 6 REGs. That is, the first control resource set contains 8 CCEs.

[78] In an exemplary method, the serial number of the first transmission block contained in the k-th control resource subset is k*R+r, the value of k is 0 to K-1, and the value of r is 0 to R-1. Taking K=4, N=4 and R=2 as an example, as shown in FIG. 4, the serial numbers of the CCEs contained in the control resource subset 0 are 0 and 1, and the serial numbers of the CCEs contained in the control resource subset 1 are 2, 3; the serial numbers of the CCEs contained in the control resource subset 2 are 4 and 5; the serial numbers of the CCEs contained in management resource subset 3 are 6, 7. In other words, management resource subset 0 contains CCE0 and CCE1, management resource subset 1 contains CCE2 and CCE3, management resource subset 2 contains CCE4 and CCE5, and management resource subset 3 contains CCE6 and CCE7, ie the CCEs are mapped sequentially on the subbands.

[79] In addition, based on FIG. The 4 REGs in each control resource subset are numbered.

[80] An exemplary numbering method is numbering method 1 as shown in FIG. 5. For example, each control resource subset contains 6 REGs, and in each control resource subset, the serial numbers of the 6 REGs are 0-5.

[81] Another possible numbering method is numbering method 2, as shown in FIG. 5, that is, the REGs in the 4 control resource subsets are numbered consecutively, the serial numbers of the 6 REGs in the control resource subset 0 are 0-5, and the serial numbers of the 6 REGs in the control resource subset 1 are 6-11, the serial numbers of the 6 REGs are in control resource subset 2 are 12-17 and the REG serial numbers 6 in control resource subset 3 are 18-23.

[82] It should be understood that in this application, the CCE or REG numbering is intended to simplify the description of the schema, but does not limit the CCE or REG suffixes. In particular, the CCE or REG serial number may be a CCE or REG suffix or may not be a CCE or REG suffix. For example, control resource subsets 0~3 respectively contain 6 REGs, REG serial numbers in each control resource subset are 0~5, but REG indices in control resource subset 0 are 0~5, REG indices in control resource subset 1 are 6~11 , the REG indices in control resource subset 2 are 12-17, and the REG indices in control resource subset 3 are 18-23.

[83] In the case of numbering the REGs according to numbering method 1, the numbering of the REGs contained in the CCE in each control resource subset can be done in the following possible ways:

[84] In an exemplary manner, since each control resource subset contains 2 CCEs, in this case, the serial numbers of the 2 CCEs contained in each control resource subset can be set to 0 and 1, for example, the serial numbers of the 2 CCEs contained in the resource subset control 0 are 0 and 1, the 2 serial numbers of the CCEs contained in the control resource subset 1 are 0 and 1, and the 2 serial numbers of the CCEs contained in the control resource subset 2 are 0 and 1, and the 2 serial numbers of the CCEs contained in control resource subset 3 are 0 and 1. The serial numbers of the REGs contained in CCE0 in control resource subset 0 are 0, 1, and 2, and the serial numbers of the REGs contained in CCE1 in control resource subset 0 are 3, 4 and 5, and in this case, all REGs numbered 0-5 are REGs in control resource subset 0. The serial numbers of the REGs contained in CCE0 in control resource subset 1 are 0, 1, and 2, and the serial numbers The serial numbers of the REGs contained in CCE1 in control resource subset 1 are 3, 4, and 5, and in this case, all REGs numbered 0-5 are REGs in control resource subset 1. The serial numbers of the REGs contained in The CCE0s in Control Resource Subset 2 are 0, 1 and 2 and the serial numbers of the REGs contained in CCE1 in Control Resource Subset 2 are 3, 4 and 5 and in this case all REGs numbered 0-5 are REGs in control resource subset 2. The serial numbers of the REGs contained in CCE0 in control resource subset 3 are 0, 1, and 2, and the serial numbers of the REGs contained in CCE1 in control resource subset 3 are 3, 4, and 5 , and in this case, all REGs numbered 0-5 are REGs in control resource subset 3.

[85] In another possible method, the serial numbers of the REGs contained in CCE0 in control resource subset 0 are 0, 2, and 4, and the serial numbers of REGs contained in CCE1 in control resource subset 0 are 1, 3, and 5, and in this case, all REGs numbered 0-5 are REGs in control resource subset 0. The serial numbers of the REGs contained in CCE0 in control resource subset 1 are 0, 2, and 4, and the serial numbers of the REGs contained in CCE1 in control resource subset 1 are 1, 3 and 5, and in this case all REGs numbered 0-5 are REGs in control resource subset 1. The serial numbers of the REGs contained in CCE0 in control resource subset 2 , are 0, 2, and 4, and the serial numbers of the REGs contained in CCE1 in Control Resource Subset 2 are 1, 3, and 5, and in this case, all REGs numbered 0-5 are REGs in Control Resource Subset 2. Group serial numbers n REGs contained in CCE0 in control resource subset 3 are 0, 2, and 4, and the serial numbers of REGs contained in CCE1 in control resource subset 3 are 1, 3, and 5, and in this case, all REGs numbered 0-5 are REGs in control resource subset 3.

[86] In the case of numbering the REGs according to numbering method 2, the numbering of the REGs contained in the CCE in each control resource subset is performed in the following possible ways:

[87] In an exemplary method, the serial numbers of the REGs contained in CCE0 are 0, 1, and 2, the serial numbers of the REGs contained in CCE1 are 3, 4, and 5, and the serial numbers of the REGs contained in CCE2 are 6 , 7 and 8, and the serial numbers of the REGs contained in CCE3 are 9, 10 and 11, the serial numbers of the REGs contained in CCE4 are 12, 13 and 14, the serial numbers of the REGs contained in CCE5 are 15, 16, 17, and the serial numbers of the REGs contained in CCE6 are 18, 19, 20, the serial numbers of the REGs contained in CCE7 are 21, 22, and 23. That is, the CCEs in each control resource subset are mapped sequentially. For example, CCE0 and CCE1 in control resource subset 0 are mapped sequentially, which is the same as in other control resource subsets and will not be described again in this document.

[88] In another possible method, the serial numbers of the REGs contained in CCE0 are 0, 2, and 4, the serial numbers of the REGs contained in CCE1 are 1, 3, and 5, and the serial numbers of the REGs contained in CCE2 are 6, 8 and 10, the serial numbers of the REGs contained in CCE3 are 7, 9, 11, the serial numbers of the REGs contained in CCE4 are 12, 14 and 16, the serial numbers of the REGs contained in CCE5 are 13, 15 and 17, and the serial numbers of the REGs contained in CCE6 are 18, 20, 22, the serial numbers of the REGs contained in CCE7 are 19, 21, and 23. That is, the CCEs in each control resource subset are interleaved and mapped. For example, CCE0 and CCE1 in control resource subset 0 are interleaved and mapped, which is the same as in other control resource subsets and will not be re-described here. Taking this method as an example, it is assumed that the PDCCH is mapped to 4 CCEs, for example, the PDCCH is mapped to the first CCE of each control resource subset, then the serial numbers of the CCEs occupied by the PDCCH are 0, 2, 4, and 6, and the PDCCH mapping sequence is as shown in FIG. 6. In other words, when mapping the PDCCH to CCE, CCE0 in control resource subset 0 is occupied first, then CCE2 is occupied in control resource subset 1, then CCE4 is occupied in control resource subset 2, and finally CCE6 in control resource subset 3 is occupied.

[89] Optionally, for each control resource subset, the number of PRBs contained in the frequency domain and/or the number of symbols contained in the time domain are configured by the network device.

[90] Otherwise, each control resource subset contains 9 PRBs in the frequency domain and 2 symbols in the time domain. As shown in FIG. 7, two consecutive REGs in the time domain form a REG group. Optionally, one CCE contains 6 REGs, then one CCE contains 3 REGs, each control resource subset contains 3 CCEs, each control resource subset contains 9 REGs, and the first control resource set contains 12 CCEs.

[91] In an exemplary manner, the serial numbers of the CCEs contained in the subset of control resources 0 are 0, 1, and 2; the serial numbers of the CCEs contained in the control resource subset 1 are 3, 4 and 5; the serial numbers of the CCEs contained in the control resource subset 2 are 6, 7 and 8; the serial numbers of the CCEs contained in the control resource subset 3 are 9, 10, and 11. As shown in FIG. 7, the REGs in each control resource subset are numbered. Optionally, the serial numbers of the REGs contained in CCE0 are 0, 3, and 6, the serial numbers of the REGs contained in CCE1 are 1, 4, and 7, the serial numbers of the REGs contained in CCE2 are 2, 5, and 8, and the serial numbers of the REGs contained in CCE3 are 9, 12 and 15, the serial numbers of the REGs contained in CCE4 are 10, 13 and 16, the serial numbers of the REGs contained in CCE5 are 11, 14 and 17, and the serial numbers the REG group numbers contained in CCE6 are 18, 21 and 24, the REG group serial numbers contained in CCE7 are 19, 22 and 25, the REG group serial numbers contained in CCE8 are 20, 23 and 26, the group serial numbers The REGs contained in CCE9 are 27, 30, and 33, and the serial numbers of the REGs contained in CCE10 are 28, 31, and 34, and the serial numbers of the REGs contained in CCE11 are 29, 32, and 35. It is assumed that The PDCCH is mapped to 8 CCEs, for example, the PDCCH is mapped to the first two CCEs of each control resource subset, then serially The th CCE numbers occupied by the PDCCH are 0, 1, 3, 4, 6, 7, 9, 10. Optionally, the PDCCH mapping sequence is as shown in FIG. 7, that is, CCE0 and CCE1 in control resource subset 0 are occupied first, then CCE3 and CCE4 in control resource subset 1 are occupied, then CCE6 and CCE7 in control resource subset 2 are occupied, and finally CCE9 and CCE10 in control resource subset 3 are occupied, however, in each subset of control resources, the serial numbers of the CCEs used to carry the PDCCH are consecutive.

[92] In another possible method, the serial numbers of the CCEs contained in the control resource subset 0 are 0, 1, and 2; the serial numbers of the CCEs contained in the control resource subset 2 are 3, 4 and 5; the serial numbers of the CCEs contained in the control resource subset 1 are 6, 7 and 8; the serial numbers of the CCEs contained in the control resource subset 3 are 9, 10, and 11. As shown in FIG. 8, the REGs in each control resource subset are numbered. Optionally the serial numbers of the REGs contained in CCE0 are 0, 3 and 6, the serial numbers of the REGs contained in CCE1 are 1, 4 and 7, the serial numbers of the REGs contained in CCE2 are 2, 5 and 8, serial the REG group numbers contained in CCE3 are 18, 21 and 24, the REG group serial numbers contained in CCE4 are 19, 22 and 25, the REG group serial numbers contained in CCE5 are 20, 23 and 26, the group serial numbers The REGs contained in CCE6 are 9, 12, and 15, the serial numbers of the REGs contained in CCE7 are 10, 13, and 16, the serial numbers of the REGs contained in CCE8 are 11, 14, and 17, and the serial numbers of the REGs contained in CCE8 are contained in CCE9 are 27, 30 and 33, the serial numbers of the REGs contained in CCE10 are 28, 31 and 34, and the serial numbers of the REGs contained in CCE11 are 29, 32 and 35. It is assumed that the PDCCH is mapped in 8 CCEs, for example, the PDCCH is mapped to the first two CCEs of each control resource subset, then serial n the numbers of the CCEs occupied by the PDCCH are 0, 1, 3, 4, 6, 7, 9, 10, and optionally the mapping sequence of the PDCCH is as shown in FIG. 8, wherein in each subset of control resources, the serial numbers of the CCEs used to carry the PDCCH are consecutive.

[93] In another possible method, the serial number of the first transmission block contained in the k-th control resource subset is k+r*K, the value of k is 0 to K-1, and the value of r is 0 to R-1 . Taking K=4, N=4, and R=3 as an example, the serial numbers of the CCEs contained in control resource subset 0 are 0, 4, and 8; the serial numbers of the CCEs contained in the control resource subset 1 are 1, 5 and 9; the serial numbers of the CCEs contained in the control resource subset 2 are 2, 6 and 10; the serial numbers of the CCEs contained in the subset of control resources 3 are 3, 7 and 11, that is, the CCEs are interleaved and mapped on subbands. As shown in FIG. 9, the REGs in each control resource subset are numbered. Optionally the serial numbers of the REGs contained in CCE0 are 0, 3 and 6, the serial numbers of the REGs contained in CCE1 are 9, 12 and 15, the serial numbers of the REGs contained in CCE2 are 18, 21 and 24, the serial numbers the numbers of the REGs contained in CCE3 are 27, 30 and 33, the serial numbers of the REGs contained in CCE4 are 1, 4 and 7, the serial numbers of the REGs contained in CCE5 are 10, 13 and 16, and the serial numbers the serial numbers of the REGs contained in CCE6 are 19, 22 and 25, the serial numbers of the REGs contained in CCE7 are 28, 31 and 34, the serial numbers of the REGs contained in CCE8 are 2, 5 and 8, the serial numbers of the REGs contained in CCE9 are 11, 14 and 17, and the serial numbers of the REGs contained in CCE10 are 20, 23 and 26, and the serial numbers of the REGs contained in CCE11 are 29, 32 and 35. It is assumed that the PDCCH mapped to 8 CCEs, e.g. PDCCH mapped to the first two CCEs of each control resource subset, then the serial the CCE numbers occupied by the PDCCH are 0, 1, 2, 3, 4, 5, 6, 7, and optionally the PDCCH mapping sequence is as shown in FIG. 9. That is, when the PDCCH is mapped to a CCE, the first CCE in each control resource subset is occupied first, and then the second CCE in each control resource subset is occupied. Optionally, the PDCCH mapping sequence may also be another sequence, for example, the serial number sequence of the CCEs occupied by the PDCCH is 0, 4, 1, 5, 2, 6, 3, 7, or, for example, the serial number sequence of the REGs contained in the CCE occupied by the PDCCH is 0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16, 18, 19, 21, 22, 24, 25, 27, 28, 30, 31, 33 , 34.

[94] In another possible method, the serial numbers of the CCEs contained in the control resource subset 0 are 0, 4, and 8; the serial numbers of the CCEs contained in the control resource subset 2 are 1, 5 and 9; and the serial numbers of the CCEs contained in the control resource subset 1 are 2, 6, and 10; the serial numbers of the CCEs contained in the control resource subset 3 are 3, 7, and 11. As shown in FIG. 10, the REGs in each control resource subset are numbered. Optionally, the serial numbers of the REGs contained in CCE0 are 0, 3, and 6, the serial numbers of the REGs contained in CCE1 are 18, 21, and 24, the serial numbers of the REGs contained in CCE2 are 9, 12, and 15, and the serial numbers of the REGs contained in CCE3 are 27, 30 and 33, the serial numbers of the REGs contained in CCE4 are 1, 4 and 7, the serial numbers of the REGs contained in CCE5 are 19, 22 and 25, the serial numbers of the REGs contained in CCE6 are 10, 13 and 16, the serial numbers of the REGs contained in CCE7 are 28, 31 and 34, the serial numbers of the REGs contained in CCE8 are 2, 5 and 8, and the serial numbers of the REGs contained in CCE8 are 2, 5 and 8, and the serial numbers of the REGs contained in CCE7 are The REGs contained in CCE9 are 20, 23 and 26, the serial numbers of the REGs contained in CCE10 are 11, 14 and 17, and the serial numbers of the REGs contained in CCE11 are 29, 32 and 35. It is assumed that the PDCCH mapped to 8 CCEs, e.g. PDCCH mapped to the first two CCEs of each control resource subset, then the serial the CCE numbers occupied by the PDCCH are 0, 1, 2, 3, 4, 5, 6, 7. Optionally, the PDCCH mapping sequence is as shown in FIG. 10. Optionally, the PDCCH mapping sequence may also be another sequence. For example, the sequence of serial numbers of the CCEs occupied by the PDCCH is 0, 4, 1, 5, 2, 6, 3, 7, or, for example, the sequence of the serial numbers of the REGs contained in the CCEs occupied by the PDCCH is 0, 1, 3 , 4, 6, 7, 18, 19, 21, 22, 24, 25, 9, 10, 12, 13, 15, 16, 27, 28, 30, 31, 33, 34.

[95] Otherwise, each control resource subset contains 8 PRBs in the frequency domain and 3 symbols in the time domain. As shown in FIG. 11, three REGs that are consecutive in the time domain form a REG group. Optionally, one CCE contains 6 REGs, then one CCE contains 2 REGs, each control resource subset contains 4 CCEs, each control resource subset contains 8 REGs, and the first control resource set contains 16 CCEs. Optionally, the serial numbers of the CCEs contained in control resource subset 0 are 0, 1, 2, and 3; the serial numbers of the CCEs contained in the control resource subset 1 are 4, 5, 6 and 7; the serial numbers of the CCEs contained in the control resource subset 2 are 8, 9, 10 and 11; the serial numbers of the CCEs contained in the control resource subset 3 are 12, 13, 14, and 15. As shown in FIG. 11, the REGs in each control resource subset are numbered. In another possible method, the serial numbers of the REGs contained in CCE0 are 0 and 4, the serial numbers of the REGs contained in CCE1 are 1 and 5, the serial numbers of the REGs contained in CCE2 are 2 and 6, the serial numbers of the REGs contained in CCE2 are contained in CCE3 are 3 and 7, the serial numbers of the REGs contained in CCE4 are 8 and 12, the serial numbers of the REGs contained in CCE5 are 9 and 13, the serial numbers of the REGs contained in CCE6 are 10 and 14, the serial numbers of the REG groups contained in CCE7 are 11 and 15, the serial numbers of the REG groups contained in CCE8 are 16 and 20, the serial numbers of the REG groups contained in CCE9 are 17 and 21, the serial numbers of the REG groups contained in in CCE10 are 18 and 22, the serial numbers of the REGs contained in CCE11 are 19 and 23, the serial numbers of the REGs contained in CCE12 are 24 and 28, the serial numbers of the REGs contained in CCE13 are 25 and 29, the serial numbers of the REGs contained in CCE14 are 26 and 30, the serial numbers of the REGs contained in the CCE15 are 27 and 31. It is assumed that the PDCCH is mapped to 8 CCEs, for example, the PDCCH is mapped to the first two CCEs of each control resource subset, then the serial numbers of the CCEs occupied by the PDCCH are 0, 1, 4, 5, 8, 9, 12 and 13, and the PDCCH mapping sequence is as shown in FIG. 11, wherein in each subset of control resources, the serial numbers of the CCEs used to carry the PDCCH are consecutive.

[96] It should be understood that the display ratio in the present application may be a relative display ratio, and in actual situations there may be an offset value, which is not limited in the present application.

[97] It should be understood that the above mapping relationship between CCEs and REGs and the process of mapping PDCCH to CCE is only an illustrative description and is not specifically limited, and other mapping methods are also possible. For the above interleaved display, the specific interlacing method is not limited. In addition, the aforementioned interleaving scheme can also be used for uplink control channel transmission.

[98] The control channel transmission method provided in the embodiment interleaves CCEs in subsets of control resources on subbands. Compared with the interleaving of all resources in CORESET, since the granularity of the control resource subset is smaller than that of CORESET, therefore, the effect of interleaving is improved, and when transmission cannot be performed on some subbands due to LBT failure, interleaving gain is not affected.

[99] In the above embodiment, each of the multiple subbands contained in the BWP is configured with a control resource, and each subband is used to transmit the PDCCH. However, in some cases, the same PDCCH may be transmitted on each subband, resulting in more redundancy in the transmission of the PDCCH, resulting in a waste of resources. To solve this problem, an improved solution is provided in the embodiment. The base station configures the control resource on each of the multiple subbands contained in the BWP, but during the actual transmission of the PDCCH, this PDCCH is only transmitted on the control resource of one subband, and the control resources of the other subbands are used for data transmission, thereby increasing resource utilization on the unlicensed spectrum. . The solution will be given below in conjunction with specific embodiments.

[100] As shown in FIG. 12, the BWP configured by the system for the terminal device contains four sub-bands, namely, sub-bands 0-3. In the configuration stage, the network device configures a control resource with the same resource size per subband. In the data preparation phase, the network device maps the PDCCH to the CCEs corresponding to the control resource on the subband. Before the network device transmits the PDCCH to the terminal device, the network device determines, among the four subbands, the subband on which the channel is acquired and the subband on which the channel is acquired, specifically, is the subband on which LBT is successful. It is assumed that the right to use the channel is not obtained on subband 0 and subband 1, and the right to use the channel is obtained on subband 2 and subband 3. In this case, the network device may select from subband 2 and subband 3 the subband with the lowest index for PDCCH transmission, and may also select from subband 2 and subband 3 the subband with the largest index for PDCCH transmission. For example, the network device selects subband 2 for PDCCH transmission. It is assumed that the Physical Downlink Shared Channel (PDSCH) is initially mapped to a potential control resource in subband 2, in which case the corresponding portion of the PDSCH is punctured.

[101] In the control channel transmission method provided in this embodiment, the PDCCH is transmitted only in the control resource of one subband, and the control resources of other subbands are used for data transmission, thereby improving resource utilization on the unlicensed spectrum.

[102] As for the terminal device, the terminal device may receive a control channel according to the first set of control resources, and the control channel may be a PDCCH in particular. The first control resource set in this case is the same as the first control resource set in the above embodiment, and will not be described again herein. Optionally, the BWP configured by the system for the terminal device contains N subbands, and the first set of control resources may be located on K subbands of N subbands, where N and K are positive integers, and N≥K≥2.

[103] Taking N=4 and K=4 as an example, as shown in FIG. 13, the network device configures the control resource on each of the 4 subbands. The set formed by the control resource on each of the 4 subbands is the first control resource set, that is, the first control resource set is located on 4 subbands. When transmitting the PDCCH, the network device will select the subband on which the right to use the channel is obtained to transmit the PDCCH to the terminal device. Before the downlink transmission opportunity of the network device occurs, the terminal device receives the control channel according to the first set of control resources, that is, the terminal device must acquire control resources on 4 subbands to receive the PDCCH. When a downlink transmission opportunity of a network device occurs, the terminal device determines the number of subbands for communication among the four subbands. For example, a channel right is not obtained on subband 0 and communication is not performed on subband 0, and a channel right is obtained on subband 1, subband 2, and subband 3, so the number of subbands for communication is 3. It can be understood that this is an illustrative description only and does not limit the number of subbands on which a channel has been granted. In this case, the number of communication subbands determined by the terminal device is less than the number of subbands contained in the BWP, that is, at least one of the four subbands is not contained in the communication subbands in the BWP. At this time, the terminal device can receive the PDCCH according to the control resources on subband 1, subband 2, and subband 3, and no longer receives the control channel according to the first set of control resources. In this case, the set of control resources on subband 1, subband 2, and subband 3 is referred to as the second control resource set. That is, the control resources contained in the second control resource set are smaller than the control resources contained in the first control resource set.

[104] As shown in FIG. 13, the downlink transmission capability of a network device includes several units of time, for example, from a time unit n to a time unit n+6. The terminal device determines that the subbands for communication include subband 1, subband 2, and subband 3 in the first downlink transmission opportunity time unit, e.g., time unit n, and do not include subband 0, then in subsequent time units (e.g., time units n+1, n+2, etc.) The PDCCH is detected on the control resources contained in the second control resource set, but the PDCCH is not detected on the control resources contained in the first control resource set.

[105] It should be understood that when a terminal device determines a subband for communication on downlink transmission capability of a network device, some time is required for processing. Therefore, there may be some time interval for the terminal device to switch from receiving the PDCCH according to the first set of control resources to receiving the PDCCH according to the second set of control resources. For example, as shown in FIG. 13, the terminal device starts receiving the PDCCH according to the second set of control resources from the time unit n+2. Optionally, the timeslot is transmitted by the network device to the terminal device by means of indication information.

[106] In particular, the terminal device can determine the subband for communication on downlink transmission capability of the network device in the following possible ways.

[107] In an exemplary method, the terminal device receives a PDCCH transmitted by a network device, wherein the PDCCH is configured to transmit a slot format indicator (SFI), and the SFI contains subband indication information for communication in the BWP. The terminal apparatus determines the subband for communication in the BWP according to the indication information.

[108] In another possible method, the terminal device detects a reference signal on each of the multiple subbands contained in the BWP to determine the subband to communicate in the BWP. For example, if a reference signal is detected by the terminal device on subband 1, the terminal device determines that subband 1 is used for communication. If the reference signal is not detected by the terminal device on subband 0, the terminal device determines that subband 0 is not used for communication.

[109] In another possible method, the terminal device receives the first indication information transmitted by the network device, and the first indication information instructs the terminal device to receive the control channel according to the second set of control resources to enable the terminal device to switch according to the first indication information from receiving the PDCCH according to the first a set of control resources to receive the PDCCH according to the second set of control resources. Optionally, the first indication information is physical layer signaling information.

[110] Optionally, the network device may also transmit second indication information to the terminal device. The second indication information is configured to indicate the position of the first control resource set to enable the terminal device to determine the first control resource set before receiving the PDCCH according to the first control resource set. Optionally, the second indication information is Radio Resource Control (RRC) signaling information.

[111] Optionally, the network device may also transmit the third indication information to the terminal device. The third indication information is configured to indicate the position of the second control resource set to enable the terminal device to determine the second control resource set before receiving the PDCCH according to the second control resource set. Optionally, the third indication information is RRC signaling information or physical layer signaling information.

[112] In the control channel transmission method provided in this embodiment, before the terminal device determines that the K subbands occupied by control resources at the time of actual transmission is less than the N subbands occupied by control resources configured by the network device, the terminal the device switches to PDCCH reception according to the actually transmitted K subbands, which can reduce the power consumption of the terminal device.

[113] For a network device, respectively, the following implementations may take place.

[114] In one implementation method, the network device prepares a control channel mapping according to the first control resource set, and when the network device determines (e.g., determines from a channel discovery result) that the subbands for communication in the first BWP do not include at least one subband from K subband, the network device still prepares the control channel mapping according to the first control resource set, but transmits the control channel according to the second control resource set. In other words, when the network device prepares the PDCCH mapping, the PDCCH mapping sequence in CCE or REG will not change according to the difference in actually transmitted subbands (for example, the network device always maps the PDCCH according to the first control resource set, or the network device repeatedly transmits the PDCCH on each of the K subbands ).

[115] Accordingly, when the terminal device determines that the P subbands occupied by the control resource at the time of actual transmission is less than the K subbands occupied by the control resource configured by the network device, the PDCCH detection method by the terminal device according to the first control resource set is the same as a PDCCH detection method according to the second control resource set. In other words, the mapping sequence of PDCCH to CCE or REG determined by the terminal device will not change according to the difference in actually transmitted subbands. The advantage of this solution is that the terminal device will not have any error in PDCCH rate matching recognition, and the implementation is simple.

[116] In one implementation method, the network device prepares a control channel mapping according to a first set of default control resources. When the network device determines (for example, determines from a channel discovery result) that the subbands for communication in the first BWP do not include at least one of the K subbands, and the above time interval is satisfied, the network device prepares a control channel mapping according to the second control resource set and transmits a control channel according to the second set of control resources. In other words, when the network device prepares the PDCCH mapping, the PDCCH mapping sequence in the CCE or REG will change according to the difference in the actual transmitted subbands.

[117] Accordingly, the PDCCH detection method according to the first control resource set is different from the PDCCH detection method according to the second control resource set. For example, the terminal device detects the PDCCH according to the first set of default control resources. When the terminal device determines that the P subbands occupied by the control resources in actual transmission is less than the K subbands occupied by the control resources configured by the network device, and the above time interval is satisfied, the terminal device detects the PDCCH according to the second set of control resources. In other words, the mapping sequence of PDCCH to CCE or REG determined by the terminal device will change according to the difference in actually transmitted subbands. The advantage of this scheme is that redundant transmission is reduced and PDCCH performance is improved. However, the risk is that if the terminal device does not correctly determine the P subbands actually transmitted, then it may have an error in recognizing the PDCCH rate matching, resulting in demodulation failure.

[118] In addition, it should be noted that uppercase and lowercase letters in the embodiments of the present application indicate different meanings, respectively. For example, capital "K" represents the number of control resource subsets contained in the first control resource set, lowercase "k" represents the k-th control resource subset of the K control resource subsets, and the value of k is 0 to K-1.

[119] FIG. 14 is a schematic structural representation of a network device according to the present application. As shown in FIG. 14, network device 140 includes:

a processing unit 141, configured to map the first control channel to S first transmission blocks contained in the first control resource set, wherein the first control resource set is a control resource set on the first part of the BWP bandwidth, the first BWP contains N subbands, the first set of control resources is located on at least one subband of N subbands, and the first transmission block is the smallest block capable of transmitting the control channel, with S and N being positive integers, S≥1 and N≥2;

a transmission module 142, configured to transmit the first control channel to the terminal device.

[120] The network device provided in this embodiment is used to implement the network device side technical solution in any of the above method embodiments, and its implementation principles and technical effects are similar and will not be re-described here.

[121] Based on the embodiment shown in FIG. 14 above, the first control resource set contains K control resource subsets, where each control resource subset of the K control resource subsets contains R first transmission blocks, each control resource subset of the K control resource subsets is located on one subband of N subbands, with K The control resource subsets are in one-to-one correspondence with K subbands of N subbands, with K and R being positive integers, K≤N and K*R≥S.

[122] Optionally, the first control resource set contains K*R first transmission blocks, wherein the serial number of the first transmission block contained in the k-th control resource subset is k*R+r, the value of k is 0 to K-1 , and the value of r is between 0 and R-1.

[123] Optionally, the first control resource set contains K*R first transmission blocks, wherein the serial number of the first transmission block contained in the k-th control resource subset is k+r*K, the value of k is 0 to K-1 , and the value of r is between 0 and R-1.

[124] Optionally, the first transmission block contains T resource block groups, the R first transmission blocks contain R*T resource block groups, wherein the serial number of the resource block group contained in the r-th first transmission block is r*T+t, the value r is from 0 to R-1, and the value of t is from 0 to T-1.

[125] Optionally, the first transmission block contains T resource block groups, the R first transmission blocks contain R*T resource block groups, wherein the serial number of the resource block group contained in the r-th first transmission block is r+t*R, the value r is from 0 to R-1, and the value of t is from 0 to T-1.

[126] Optionally, the serial numbers of at least two transmission blocks S of the first transmission blocks are non-consecutive, with S≥2.

[127] Optionally, the first set of control resources contains K subsets of control resources, while S=K*M, K and M are positive integers, K≤N, M≥1; when the processing unit 141 maps the first control channel to S first transmission units contained in the first control resource set, the processing unit 141 is specifically configured to: when mapping the first control channel, first occupying M first transmission units with consecutive numbers in the kth a control resource subset of the K control resource subsets, then occupying the M first consecutive numbered transmission blocks in the (k+1)th control resource subset of the K control resource subsets, where k is 0 to K-1.

[128] Optionally, the first set of control resources contains K subsets of control resources, while S=K*M, K and M are positive integers, K≤N, and M≥1; when the processing module 141 maps the first control channel to S first transmission blocks contained in the first control resource set, the processing module 141 is specifically configured: when mapping the first control channel, first occupying the m-th first transmission block in each control resource subset of the K subsets of control resources, and then occupying the (m+1)-th first transmission block in each subset of control resources, with the value of m being from 0 to M-1.

[129] Optionally, the S first transmission blocks are located on one subband of the N subbands.

[130] Optionally, one subband is the subband on which the right to use the channel is obtained.

[131] Optionally, before the transmission module 142 transmits the first control channel to the terminal device, the processing module 141 is further configured to determine the subband on which the right to use the channel is obtained among the N subbands; at the time of transmitting the first control channel to the terminal device, the transmission unit 142 is specifically configured to: transmit the first control channel to the terminal device on the subbands on which the channel has been acquired among the N subbands.

[132] In an embodiment of the present application, a terminal device is provided. The terminal device comprises: a receiving module configured to receive a first control channel transmitted by a network device, wherein the first control channel is mapped to S first transmission blocks contained in the first control resource set, wherein the first control resource set is a control resource set on of the first portion of the BWP bandwidth, wherein the first BWP comprises N subbands, the first control resource set is located on at least one subband of N subbands, the first transmission block is the smallest block to transmit the control channel, with S and N being positive integers , S≥1 and N≥2.

[133] The terminal device provided in the embodiment is used to implement the terminal device side technical solution in any of the above method embodiments, and its implementation principles and technical effects are similar and will not be re-described herein.

[134] In addition, the first control resource set contains K control resource subsets, with each of the K control resource subsets containing R first transmission blocks, each control resource subset of the K control resource subsets is located on one subband of N subbands, with K The control resource subsets are in one-to-one correspondence with K subbands of N subbands, with K and R being positive integers, K≤N and K*R≥S.

[135] Optionally, the first control resource set contains K*R first transmission blocks, wherein the serial number of the first transmission block contained in the k-th control resource subset is k*R+r, the value of k is 0 to K-1 , and the value of r is between 0 and R-1.

[136] Optionally, the first control resource set contains K*R first transmission blocks, wherein the serial number of the first transmission block contained in the k-th control resource subset is k+r*K, the value of k is 0 to K-1 , and the value of r is between 0 and R-1.

[137] Optionally, the first transmission block contains T resource block groups, the R first transmission blocks contain R*T resource block groups, and the serial number of the resource block group contained in the r-th first transmission block is r*T+t, the value is r is from 0 to R-1, and the value of t is from 0 to T-1.

[138] Optionally, the first transmission block contains T resource block groups, the R first transmission blocks contain R*T resource block groups, and the serial number of the resource block group contained in the r-th first transmission block is r+t*R, the value is r is from 0 to R-1, and the value of t is from 0 to T-1.

[139] Optionally, the serial numbers of the at least two first transmission blocks of the S first transmission blocks are non-consecutive, with S≥2.

[140] Optionally, the S first transmission blocks are located on one subband of the N subbands.

[141] Optionally, one subband is the subband on which the right to use the channel is obtained.

[142] FIG. 15 is another schematic structural representation of a terminal device according to the present application. As shown in FIG. 15, terminal device 150 includes:

a receiving unit 151, configured to receive a control channel according to a first control resource set, wherein the first control resource set is a control resource set on a first part of the BWP bandwidth, the first BWP contains N subbands, the first control resource set is located on K subbands of N subbands, with N and K being positive integers, and N≥K≥2;

a processing unit 152, configured to determine that the communication subband in the first BWP does not contain at least one of the K subbands;

wherein the receiving module 151 is further configured: when the processing module 152 determines that the communication subband in the first BWP does not contain at least one of the K subbands, receiving the control channel according to the second control resource set, wherein the second control resource set is located into P subbands of K subbands, where P is a positive integer, and 1≤P<K.

[143] The terminal device provided in this embodiment is used to implement the terminal device side technical solution in any of the above method embodiments, and its implementation principles and technical effects are similar and will not be re-described herein.

[144] In addition, the second control resource set includes resources located on P subbands in the first control resource set.

[145] Optionally, the processing module 152 is specifically configured to: determine a subband for communication in the first BWP according to the first downlink control channel transmitted by the network device; determining according to the subband for relating that the subband for communication in the first BWP does not contain at least one subband of the K subbands.

[146] Optionally, the first downlink control channel is configured to transmit time slot format information, SFI, and the SFI contains subband indication information for communication in the first BWP.

[147] Optionally, the processing module 152 is specifically configured to: determine, according to detection of the presence of a reference signal on each subband of the K subbands, that the subband for communication in the first BWP does not contain at least one subband of the K subbands.

[148] Optionally, the receiving module 151 is further configured to: receive the first indication information transmitted by the network device, wherein the first indication information is configured to instruct the terminal device to receive a control channel according to the second set of control resources.

[149] Optionally, the receiving module 151 is further configured to: receive second indication information transmitted by the network device; the processing module 152 is further configured to determine the first set of control resources according to the second indication information.

[150] Optionally, the receiving module 151 is further configured to: receive third indication information transmitted by the network device; the processing unit 152 is further configured to determine the second set of control resources according to the third indication information.

[151] FIG. 16 is another schematic structural representation of a terminal device according to the present application. As shown in FIG. 16, terminal device 160 includes:

a processor 161, a storage device 162, and an interface 163 for communication with a network device;

wherein the memory 162 stores instructions for execution by the computer;

wherein the processor 161 executes instructions for execution by the computer stored in the storage device 162, which results in the processor 161 executing the technical solution on the side of the terminal device in any of the above embodiments of the method.

[152] FIG. 16 shows a simple design of the terminal device. An embodiment of the present application does not limit the number of processors and storage devices in a terminal device. Fig. 16 as an example for illustration, they are taken in the amount of only 1.

[153] FIG. 17 is another schematic structural representation of a network device according to the present application. As shown in FIG. 17, network device 170 includes:

a processor 171, a storage device 172, and an interface 173 for communication with a terminal device;

wherein the storage device 172 stores instructions for execution by the computer;

wherein the processor 171 executes instructions for execution by the computer stored in the storage device 172, which results in the processor 171 executing the technical solution on the side of the network device in any of the above embodiments of the method.

[154] FIG. 17 shows a simple design of a network device. In an embodiment of the present application, the number of processors and storage devices in a network device is not limited. Fig. 17 as an example for illustration, they are taken in the amount of only 1.

[155] In a specific implementation of the terminal device shown in FIG. 16 and the network device described in FIG. 17, the storage device, the processor, and the interface may be connected by a bus. Optionally, a storage device may be integrated into the processor.

[156] In an embodiment of the present application, a computer-readable storage medium is also provided. The computer-readable storage medium stores instructions for execution by the computer, and instructions for execution by the computer when executed by the processor are designed to implement the technical solution of the terminal device in any of the above embodiments of the method.

[157] In an embodiment of the present application, a computer-readable storage medium is also provided, wherein the computer-readable storage medium stores instructions for execution by the computer, and instructions for execution by the computer when executed by the processor are intended to implement the technical solution of the network device in any of the above embodiments of the method.

[158] In an embodiment of the present application, a program is also provided, and the program, when executed by the processor, is for executing the technical solution of the terminal device in any of the above embodiments of the method.

[159] In an embodiment of the present application, a program is also provided, and the program, when executed by the processor, is for executing the technical solution of the network device in any of the above method embodiments.

[160] Optionally, the above processor may be a chip.

[161] An embodiment of the present application also provides a computer program product containing program instructions, and the program instructions are for implementing the technical solution of the terminal device in any of the above embodiments of the method.

[162] An embodiment of the present application also provides a computer program product containing program instructions, and the program instructions are for implementing the network device solution in any of the above method embodiments.

[163] An embodiment of the present application also provides a chip that includes a processing module and a communication interface, and the processing module can execute the technical solution at the terminal device side in any of the above method embodiments.

[164] In addition, the chip also includes a storage module (such as a memory device), wherein the storage module is configured to store instructions, the processing module is configured to execute instructions stored in the storage module, and execute instructions stored in the storage module, leads to execution by the processing module of the technical solution on the side of the terminal device in any of the above embodiments of the method.

[165] An embodiment of the present application also provides a chip that includes a processing module and a communication interface, and the processing module can execute the network device side solution in any of the above method embodiments.

[166] In addition, the chip also includes a storage module (such as a storage device), wherein the storage module is configured to store instructions, the processing module is configured to execute instructions stored in the storage module, and execute instructions stored in the storage module, leads to execution by the processing module of the technical solution on the side of the network device in any of the above embodiments of the method.

[167] In several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented differently. For example, the device embodiments described above are illustrative only. For example, the division of modules is only a division of logical functions, and other divisions may be applied in the actual implementation, for example, several modules may be combined or combined into another system, or some features may be ignored or not performed. In addition, the interconnections shown or discussed, or direct communications or communications connections, may be implemented via some interfaces. Indirect communications or communication connections of modules may be implemented in electronic, mechanical or other forms.

[168] In a particular embodiment of the aforementioned terminal device and network device, it should be understood that the processor may be a central processing unit (CPU), or other general purpose processors, digital signal processors (DSPs), an application specific integrated circuit (ASIC), etc. A general purpose processor may be a processor, or the processor may also be any conventional processor or the like. through a combination of hardware and software modules in the processor.

[169] All or part of the steps in the above embodiment of the method may be implemented by a program providing instructions to associated hardware. The above program may be stored in a computer-readable storage device. When the program is executed, it executes the steps that include the above embodiments of the method; and the above storage device (data storage medium) includes: read only memory (ROM), RAM, flash memory, hard disk, solid state drive, magnetic tape, floppy disk, optical disk, and any combination thereof.

Claims (21)

1. A method for detecting a physical downlink control channel (PDCCH) applied to a terminal device, the method including: detection of the PDCCH according to the first control resource set, wherein the first control resource set is a control resource set on the first part of the bandwidth (BWP), wherein the first BWP contains N subbands, the first control resource set is located on K subbands of N subbands, while N and K are positive integers, and N≥K≥2; when determining that the subbands corresponding to the first set of control resources comprise a non-communication subband, not detecting a PDCCH on the non-communication subband; and/or PDCCH detection according to the second control resource set, wherein the subbands corresponding to the second control resource set contain P subbands for communication in K subbands, where P is a positive integer, and 1≤P<K, and the second control resource set contains the resource of the first a control resource set located on the P subbands. 2. The method of claim 1, wherein determining that the subbands corresponding to the first set of control resources comprise a non-communication subband comprises: determining a subband for communication in the first BWP according to the first downlink control channel transmitted by the network device; determining that the subbands corresponding to the first control resource set contain a subband not included in the subband for communication in the first BWP. 3. The method of claim 2, wherein the first downlink control channel is configured to transmit for transmitting slot format information, and the slot format information includes subband indication information for communication in the first BWP. 4. The method of claim 1, wherein determining that the subbands corresponding to the first set of control resources comprise a non-communication subband comprises: receiving the first indication information transmitted by the network device, the first indication information being configured to instruct the terminal device to receive the PDCCH according to the second control resource set. 5. A physical downlink control channel (PDCCH) discovery terminal device (150), comprising: a receiving module (151) and a processing module (152); wherein the receiving module (151) is configured to detect the PDCCH according to the first control resource set, wherein the first control resource set is a control resource set on the first part of the bandwidth (BWP), while the first BWP contains N subbands, the first control resource set located on K subbands of N subbands, N and K being positive integers, and N≥K≥2; wherein the receiving module (151) is further configured to: when the processing module (152) determines that the subbands corresponding to the first control resource set contain a non-communication subband, no PDCCH detection on non-communication subband; and/or PDCCH detection according to the second control resource set, wherein the subbands corresponding to the second control resource set contain P subbands for communication in K subbands, where P is a positive integer, and 1≤P<K, and the second control resource set contains the resource of the first a control resource set located on the P subbands. 6. Terminal device (150) according to claim 5, characterized in that the processing module (152) is, in particular, configured to: determining a subband for communication in the first BWP according to the first downlink control channel transmitted by the network device; determining that the subbands corresponding to the first control resource set contain a subband not included in the subband for communication in the first BWP. 7. The terminal device (150) according to claim 6, characterized in that the first downlink control channel is configured to transmit for transmitting slot format information, and the slot format information contains subband indication information for communication in the first BWP. 8. The terminal device (150) according to claim 5, characterized in that the receiving module (151) is further configured to receive the first indication information transmitted by the network device, wherein the first indication information is configured to issue a command to the terminal device (150) to receive PDCCH according to the second set of control resources.

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