Control channel transmission method, device, and storage medium

Abstract

To provide a control channel transmission method, an apparatus, and a storage medium for transmitting a first control channel to a terminal apparatus via a first transmission unit of control resources in at least one sub-band.SOLUTION: A method includes: mapping, by a network apparatus, a first control channel to S first transmission units included in a first control resource set, in which the first control resource set is a control resource set at a first BWP, the first BWP contains N sub-bands, the first control resource set is located in a sub-band of the N sub-bands, the first transmission unit is the minimum unit for transmitting the control channel, and S and N are positive integers and S≥1 and N≥2; and transmitting, by the network apparatus, the first control channel to the terminal apparatus.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] TECHNICAL FIELD The present invention relates to communication technology, and more particularly to a control channel transmission method, device, and storage medium. [Background technology]

[0002] Unlicensed spectrum is a spectrum that is available for wireless device communication divided by country and region, and is generally considered a shared spectrum, meaning that communication devices in different communication systems can use the spectrum as long as they meet the legal requirements set for that spectrum in the country or region, without applying for a specific spectrum license from the government. In addition, communication devices operating in unlicensed spectrum must follow the Listen Before Talk (LBT) principle, meaning that before transmitting a signal on a channel in the unlicensed spectrum, a communication device must listen to the channel, and can only transmit a signal on that channel if the channel is idle as a result of listening.

[0003] In a new radio (NR-based access to unlicensed spectrum, NR-U) system, the spectrum used by communication devices is the unlicensed spectrum. The system bandwidth of the NR-U system is large, e.g., 40 MHz, 60 MHz, 80 MHz, etc. Accordingly, the bandwidth of the bandwidth part (BWP) allocated by the system for terminals may be 40 MHz, 60 MHz, 80 MHz, etc. Because the bandwidth of the LBT subband in the unlicensed spectrum is 20 MHz, one BWP may include multiple LBT subbands.

[0004] Therefore, when one BWP includes multiple LBT subbands, how to transmit control channels in multiple LBT subbands included in one BWP is currently an issue that needs to be urgently resolved. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiments of the present application provide a control channel transmission method, device, and storage medium to solve the problem of how to transmit a first control channel in multiple subbands. [Means for solving the problem]

[0006] In a first aspect, an embodiment of the present application may provide a control channel transmission method applied to a network device, the method including: Mapping a first control channel to S first transmission units included in a first control resource set, where the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located in at least one subband among the N subbands, the first transmission unit is a minimum unit for transmitting a control channel, S and N are positive integers, S≧1, N≧2; and transmitting the first control channel to a terminal device.

[0007] In a second aspect, an embodiment of the present application may provide a control channel transmission method applied to a terminal device, the method including: receiving a first control channel transmitted by a network device and mapped to S first transmission units included in a first control resource set, wherein the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located in at least one subband among the N subbands, the first transmission unit is a minimum unit for transmitting a control channel, S and N are positive integers, S≧1, N≧2.

[0008] In a third aspect, embodiments of the present application can provide a method for transmitting a control channel applied to a terminal device, and the method includes: receiving a control channel according to a first control resource set, where the first control resource set is a control resource set in a first bandwidth part BWP, the first BWP includes N sub-bands, the first control resource set is located in K sub-bands among the N sub-bands, N and K are positive integers, and N≥K≥2; when it is determined that the sub-bands used for communication in the first BWP do not include at least one of the K sub-bands, receiving a control channel according to a second control resource set, where the second control resource set is located in P sub-bands among the K sub-bands, P is a positive integer, and 1≤P<K.

[0009] In a fourth aspect, embodiments of the present application can provide a network device, and the network device includes: a processing module for mapping a first control channel to S first transmission units included in a first control resource set; a transmission module for transmitting the first control channel to a terminal device, where the first control resource set is a control resource set in a first bandwidth part BWP, the first BWP includes N sub-bands, the first control resource set is located in at least one of the N sub-bands, the first transmission unit is the minimum unit for transmitting a control channel, and S and N are positive integers, S≥1, and N≥2.

[0010] In a fifth aspect, embodiments of the present application can provide a terminal device, and the terminal device includes: The wireless communication system includes a receiving module for receiving a first control channel transmitted by a network device, the first control resource set being mapped to S first transmission units included in a first control resource set, wherein the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located in at least one subband among the N subbands, the first transmission unit is a minimum unit for transmitting a control channel, S and N are positive integers, S≧1, N≧2.

[0011] In a sixth aspect, an embodiment of the present application may provide a terminal device, the terminal device comprising: a receiving module for receiving a control channel according to a first control resource set, where the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located on K subbands within the N subbands, N and K are positive integers, and N≧K≧2; a processing module for determining that subbands used for communication in the first BWP do not include at least one subband of the K subbands; The receiving module may further include, when the processing module determines that the subbands used for communication in the first BWP do not include at least one subband among the K subbands, a second control resource set is used to receive a control channel according to the second control resource set, the second control resource set being located on P subbands among the K subbands, where P is a positive integer, and 1≦P <Kである。

[0012] In a seventh aspect, embodiments of the present application may provide a network device, the network device comprising: Processor, memory, and Terminal an interface for communicating with the device; the memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, causing the processor to perform the control channel transmission method according to the first aspect.

[0013] In an eighth aspect, an embodiment of the present application may provide a terminal device, the terminal device comprising: a processor, a memory, and an interface for communicating with a network device; the memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, causing the processor to perform the control channel transmission method according to the second or third aspect.

[0014] In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium having computer-executable instructions stored thereon, the computer-executable instructions being used to implement the control channel transmission method described in the first aspect when executed by a processor.

[0015] In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium having computer-executable instructions stored thereon, the computer-readable storage medium being used to implement the control channel transmission method of the second or third aspect when executed by a processor.

[0016] In an eleventh aspect, an embodiment of the present application provides a program for, when executed by a processor, performing the control channel transmission method according to the first aspect.

[0017] In a twelfth aspect, an embodiment of the present application also provides a program for, when executed by a processor, performing the control channel transmission method according to the second or third aspect.

[0018] Alternatively, the processor may be a chip.

[0019] In a thirteenth aspect, an embodiment of the present application provides a computer program product including program instructions for implementing the control channel transmission method according to the first aspect.

[0020] In a fourteenth aspect, an embodiment of the present application provides a computer program product including program instructions for implementing the control channel transmission method according to the second or third aspect.

[0021] In a fifteenth aspect, an embodiment of the present application provides a chip including a processing module and a communication interface, capable of performing the control channel transmission method according to the first aspect.

[0022] Furthermore, the chip also includes a storage module (e.g., a memory), the storage module is used to store instructions, and the processing module is used to execute the instructions stored in the storage module, the execution of the instructions stored in the storage module causing the processing module to perform the control channel transmission method described in the first aspect.

[0023] In a sixteenth aspect, an embodiment of the present application provides a chip including a processing module and a communication interface, capable of performing the control channel transmission method according to the second or third aspect.

[0024] Furthermore, the chip also includes a storage module (e.g., a memory), the storage module being used to store instructions, and the processing module being used to execute the instructions stored in the storage module, the execution of the instructions stored in the storage module causing the processing module to perform the control channel transmission method described in the second or third aspect. [Effects of the Invention]

[0025] The control channel transmission method, device, and storage medium according to the embodiments of the present application map a first control channel to at least one first transmission unit of a control resource set in a first bandwidth portion BWP via a network device, the first transmission unit being the smallest unit for transmitting a control channel, the first bandwidth portion BWP including multiple subbands, control resources being allocated to at least one subband among the multiple subbands, and the control resources allocated to at least one subband among the multiple subbands constituting a control resource set in the BWP, and cause the network device to map the first control channel to the first transmission unit in the control resources in the at least one subband, thereby enabling the first control channel to be transmitted to a terminal device via the first transmission unit in the control resources in the at least one subband, thereby solving the problem of how to transmit a first control channel in multiple subbands. [Brief explanation of the drawings]

[0026] In order to more clearly describe the technical means in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without any creative work. [Figure 1] 1 is a schematic diagram of a communication system according to the present application; [Figure 2] 1 is a schematic diagram of control resources according to the present application; [Figure 3] FIG. 2 is a schematic diagram of another control resource according to the present application. [Figure 4] FIG. 2 is a schematic diagram of another control resource according to the present application; [Figure 5] FIG. 1 is a schematic diagram of REG group numbers according to the present application. [Figure 6] 1 is a schematic diagram of mapping PDCCH to CCE according to the present application; [Figure 7]FIG. 10 is a schematic diagram of another PDCCH to CCE mapping according to the present application; [Figure 8] 10 is a schematic diagram of another PDCCH to CCE mapping according to the present application; [Figure 9] 1 is a schematic diagram of mapping a further PDCCH to a CCE according to the present application; [Figure 10] 1 is a schematic diagram of mapping a further PDCCH to a CCE according to the present application; [Figure 11] 1 is a schematic diagram of mapping a further PDCCH to a CCE according to the present application; [Figure 12] 1 is a schematic diagram of mapping PDCCH to subbands according to the present application; [Figure 13] 2 is a schematic diagram of a downlink transmission opportunity of a network device according to the present application; [Figure 14] 1 is a structural schematic diagram of a network device according to the present application; [Figure 15] FIG. 2 is another structural schematic diagram of a terminal device according to the present application; [Figure 16] FIG. 2 is another structural schematic diagram of a terminal device according to the present application; [Figure 17] FIG. 2 is another structural schematic diagram of a network device according to the present application; DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to clarify the purpose, technical means and advantages of the embodiments of the present application, the following will clearly and completely describe the technical means in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and obviously, the described embodiments are not all embodiments but only some embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative work fall within the scope of protection of the present application.

[0028] The terms "first," "second," etc. in the description of the embodiments of the present application, the claims, and the above drawings are used to distinguish between similar objects and not to describe a particular order or chronology. It should be understood that such terms can be interchanged where appropriate, such that the embodiments of the present application described herein can be performed in orders other than those illustrated or described herein. Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover non-exclusive inclusions; for example, a process, method, system, product, or apparatus comprising a series of steps or units need not be limited to those steps or units explicitly ordered, but may include other steps or units that are not explicitly ordered or inherent to the process, method, system, product, or apparatus.

[0029] The following describes the technical means in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and obviously, the described embodiments are not all embodiments but only some embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0030] The technical solutions of the embodiments of the present application may be applied to various communication systems, such as a Global System of Mobile Communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an Advanced Long Term Evolution (LTE-A) system, a New Radio (NR) system, an evolution of an NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a Universal Mobile Telecommunications System (UMTS), ... The present invention may be applied to a wide variety of communication systems, such as Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next generation communication systems, or other communication systems.

[0031] Conventional communication systems typically support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems now support not only conventional communication but also device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication, and the embodiments of the present application can also be applied to these communication systems.

[0032] 1 shows a communication system 100 according to an embodiment of the present application. The communication system 100 may include a network device 110, which is a device capable of communicating with terminal devices 120 (also called communication terminals or terminals). The network device 110 can provide communication coverage to a specific geographic area and can communicate with the terminal devices located within the coverage area. Alternatively, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (Node B, NB) in a WCDMA system, an evolved base station (Evolution Node B, eNB or eNodeB) in an LTE system, or a radio controller in a Cloud Radio Access Network (CRAN). Alternatively, the network device may be a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network side device in a 5G network, or a network device in a future evolved Public Land Mobile Network (PLMN).

[0033] The communication system 100 also includes at least one terminal device 120 within the coverage area of ​​the network device 110. As used herein, a "terminal device" connection includes, but is not limited to, a connection via a wired line, e.g., a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), digital cable, direct cable, and / or other data / network, and / or a connection via a wireless interface, e.g., a digital television network, e.g., a cellular network, a Wireless Local Area Network (WLAN), a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and / or a device configured to receive / transmit communication signals for other terminal devices, and / or a connection via an Internet of Things (IoT) device. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular telephones, Personal Communications System (PCS) terminals that can combine cellular radiotelephone with data processing, facsimile, and data communication capabilities, radiotelephones, pagers, PDAs that can include Internet / intranet access, web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers, and traditional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. Terminal equipment may also be referred to as an access terminal, User Equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device.An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.

[0034] Alternatively, device to device (D2D) communication can be performed between the terminal devices 120.

[0035] Alternatively, a 5G system or a 5G network may also be referred to as a New Radio (NR) system or a NR network.

[0036] FIG. 1 exemplarily illustrates one network device and two terminal devices, and alternatively, the communication system 100 may include multiple network devices, and the coverage area of ​​each network device may include other numbers of terminal devices, and the embodiments of the present application are not limited thereto.

[0037] In FIG. 1, the network equipment may be an access equipment, for example, a 5G New Radio Access Technology (NR) base station (next generation Node B, gNB) or an access equipment in an NR-U system such as a small station or a microstation, or may also be a relay station, a Transmission and Reception Point (TRP), a Road Side Unit (RSU), etc.

[0038] The terminal device may also be referred to as a mobile terminal, user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, user terminal, terminal, wireless communication device, user agent, or user equipment. Specifically, the terminal device may be a smartphone, a cellular phone, a cordless phone, a personal digital assistant (PDA), a handheld device with wireless communication capabilities or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, etc. In the present embodiment, the terminal device has an interface for communicating with a network device (e.g., a cellular network).

[0039] Optionally, the communication system 100 may also include other network entities such as a network controller, a mobility management entity, etc., and the embodiments of the present application are not limited thereto.

[0040] It should be understood that in the embodiments of the present application, a device having a communication function in a network / system can be referred to as a communication device. Taking the communication system 100 shown in Figure 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, where the network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here. The communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., and the embodiments of the present application are not limited thereto.

[0041] It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and / or" herein is only a relational relationship describing related objects, and represents that three relationships can exist, for example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Note that the symbol " / " herein generally represents that the related objects before and after it are in an "or" relationship.

[0042] The method of the present application can be applied to communications in unlicensed spectrum, and also to other communications scenarios, for example, in licensed spectrum.

[0043] Unlicensed spectrum is a spectrum available for wireless device communication divided by country and region. This spectrum may be considered a shared spectrum, i.e., communication devices in different communication systems can use the spectrum as long as they meet the legal requirements of the country or region for that spectrum, without applying for specific spectrum approval from the government. To enable communication systems that use unlicensed spectrum for wireless communication to coexist amicably in the spectrum, communication devices can follow the Listen Before Talk (LBT) principle when communicating in the unlicensed spectrum. That is, before transmitting a signal on a channel in the unlicensed spectrum, the communication device must first listen to the channel (also called channel detection). Only if the channel is idle can the communication device transmit a signal, or the communication device obtains the right to use the channel. If the channel is busy when the communication device listens to the channel in the unlicensed spectrum, the communication device cannot transmit a signal, or the communication device does not obtain the right to use the channel. Optionally, the bandwidth of the LBT is 20 MHz or an integer multiple of 20 MHz.

[0044] A control channel transmission method according to the present application includes: a network device mapping a first control channel to S first transmission units included in a first control resource set, where the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located in at least one subband of the N subbands, the first transmission unit is a minimum unit for transmitting a control channel, S and N are positive integers, and S≧1, N≧2; and further, the network device transmitting the first control channel to a terminal device.

[0045] It should be understood that the subbands may be LBT subbands or subbands divided in other ways, and the present application is not limited thereto.

[0046] In this embodiment, the first control channel may specifically be a physical downlink control channel (PDCCH) transmitted by a network device to a terminal device. The first bandwidth portion (BWP) may be a BWP configured by the system for a terminal device. The BWP includes multiple subbands, where N is the number of subbands included in the BWP, where N is a positive integer and N≧2. For example, assuming N=4, as shown in FIG. 2, the BWP configured by the system for a terminal device includes four subbands, such as subband 0, subband 1, subband 2, and subband 3. Optionally, each of subbands 0, 1, 2, and 3 is an LBT subband. Control resources may be configured in at least one of the four subbands, and the number of control resources configured in each subband is not limited. Here, a set of control resources included in the BWP is referred to as a first control resource set, and the first control resource set may be located in at least one of the four subbands.

[0047] As shown in FIG. 2, control resources are configured in each subband, and a set consisting of control resources 0-3 is referred to as a first control resource set. Alternatively, the first control resource set may specifically be one control resource set (CORESET). As shown in FIG. 3, a network device configures control resource set 0 in a terminal device, and control resource set 0 has control resources in each subband. Alternatively, control resource set 0 may also have corresponding control resources in some of the four subbands. For example, control resource set 0 may have control resources in subband 0 but not in other subbands. For example, control resource set 0 may have control resources in subband 0 and subband 1 but not in other subbands. As shown in FIG. 2 or 3, optionally, the control resources in each subband may include an integer number of first transmission units, and the first transmission units may specifically be control channel elements (CCEs), where a CCE is the smallest unit for transmitting a PDCCH. Here, the control resources in each subband may be a control resource subset, that is, the first control resource set is composed of control resource subsets, and there is not a control resource subset in each subband, so the number of control resource subsets included in the first control resource set is less than or equal to the number of subbands included in the BWP, where the number of control resource subsets included in the first control resource set is K, where K is a positive integer and K≦N. Each control resource subset among the K control resource subsets may include an integer number of CCEs, where R is the number of CCEs included in each control resource subset.

[0048] When K is smaller than N, it means that some of the N subbands do not have control resource subsets. For example, when K=3 and N=4, it means that only three of the four subbands have control resource subsets and one subband has no control resource subset. For example, subband 0, subband 1, and subband 2 each have one control resource subset, and subband 3 has no control resource subset. When K is equal to N, it means that each of the N subbands has one control resource subset.

[0049] Optionally, the size of the control resource subset in each subband is the same. Take K=4, N=4, and R=2 as an example. If there is one control resource subset in each of the four subbands, and the control resource subset in each subband includes two CCEs, the control resource subsets in the four subbands include a total of eight CCEs, that is, the first control resource set includes eight CCEs. The network equipment can map the PDCCH to the eight CCEs, or the network equipment can map the PDCCH to a portion of the eight CCEs.

[0050] Optionally, the size of the control resource subset in each subband is different. Taking K=4 and N=4 as an example, there is one control resource subset in each of the four subbands, where the control resource subsets in subband 0 and subband 1 each include six CCEs, and the control resource subsets in subband 2 and subband 3 each include four CCEs. In some embodiments, the size of the control resource subset in each subband can be different, and the control channel transmission method of the present application can be applied not only to situations where the size of the control resource subsets in each subband is the same, but also to situations where the size of the control resource subsets in each subband is different. The following embodiments will be described illustratively using the example where the size of the control resource subsets in each subband is the same. Optionally, if the size of the control resource subsets in each subband is different, in the process of the CCE or REG group mapping method of this embodiment, if the control resource subset in a certain subband does not include an unmapped CCE or REG group, mapping of that subband can be skipped.

[0051] The control channel transmission method according to this embodiment maps a first control channel to at least one first transmission unit of a control resource set in a first bandwidth portion BWP via a network device, the first transmission unit being the smallest unit for transmitting a control channel, the first bandwidth portion BWP including multiple subbands, control resources being allocated to at least one subband among the multiple subbands, and the control resources allocated to at least one subband among the multiple subbands constituting a control resource set in the BWP, and causes the network device to map the first control channel to the first transmission unit in the control resources in the at least one subband, thereby enabling the first control channel to be transmitted to a terminal device via the first transmission unit in the control resources in the at least one subband, thereby solving the problem of how to transmit a first control channel in multiple subbands.

[0052] Typically, one CCE includes six resource element groups (REGs), where one REG occupies 12 subcarriers in the frequency domain and one symbol in the time domain. One REG can include 12 resource elements (REs). It can be understood that the REs in one REG can be used to transmit a PDCCH or a demodulation reference signal (DMRS).

[0053] Take R=2 as an example, that is, each control resource subset includes two CCEs, and each control resource subset includes 12 REGs. Within the same control resource subset, there is a corresponding mapping relationship between CCEs and REGs. Before introducing the mapping relationship between CCEs and REGs, we first introduce the concept of a resource unit group, which may be a REG group. One REG group includes L consecutive REGs, where L is a positive integer and L≦6. Optionally, L may be a high-level configuration parameter, and the value of L is 2, 3, or 6.

[0054] Alternatively, for non-interleaved CCE to REG mapping, L=6, and one CCE corresponds to one REG group.

[0055] Alternatively, if the mapping from CCE to REG is interleaved and the control resource subset includes one symbol in the time domain, L=2 or 6, and one CCE corresponds to three or one REG group.

[0056] Alternatively, if the mapping from CCE to REG is interleaved and the control resource subset includes two symbols in the time domain, L=2 or 6, and one CCE corresponds to three or one REG group.

[0057] Alternatively, if the mapping from CCE to REG is interleaved and the control resource subset includes three symbols in the time domain, L=3 or 6, and one CCE corresponds to two or one REG group.

[0058] Optionally, for interleaved CCE to REG mapping, the interleaved unit is a REG group.

[0059] Hereinafter, the mapping relationship between CCEs and REG groups and the process of mapping PDCCHs to CCEs will be described in detail with reference to specific embodiments.

[0060] For example, assuming K=4, N=4, and R=2, the first control resource set includes four control resource subsets, e.g., control resource subsets 0 to 3, as shown in FIG. 4. Each control resource subset includes 12 physical resource blocks (PRBs) in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain. Each small grid in FIG. 4 represents one resource element group (REG), e.g., 44 denotes any one REG. Assuming two REGs constitute one REG group, 45 denotes any one REG group, as shown in FIG. 4. Alternatively, if one CCE includes six REGs, one CCE includes three REG groups, each control resource subset includes two CCEs, and two CCEs include six REG groups. That is, the first control resource set includes eight CCEs.

[0061] In one possible embodiment, the number of the first transmission unit included in the kth control resource subset is k*R+r, where k ranges from 0 to K-1 and r ranges from 0 to R-1. Taking K=4, N=4, and R=2 as an example, as shown in FIG. 4, the CCEs included in control resource subset 0 are numbered 0 and 1, the CCEs included in control resource subset 1 are numbered 2 and 3, the CCEs included in control resource subset 2 are numbered 4 and 5, and the CCEs included in control resource subset 3 are numbered 6 and 7. That is, control resource subset 0 includes CCE0 and CCE1, control resource subset 1 includes CCE2 and CCE3, control resource subset 2 includes CCE4 and CCE5, and control resource subset 3 includes CCE6 and CCE7, i.e., the CCEs are mapped sequentially in the subbands.

[0062] Furthermore, based on FIG. 4, the REG groups within each control resource subset are numbered.

[0063] One possible numbering scheme is numbering scheme 1 as shown in FIG. 5, where, for example, each control resource subset includes six REG groups, and within each control resource subset, the six REG groups are all numbered 0 to 5.

[0064] Another possible numbering scheme is numbering scheme 2 as shown in Figure 5, i.e., the REG groups in the four control resource subsets are numbered sequentially, and the six REG groups in control resource subset 0 are numbered 0 to 5, the six REG groups in control resource subset 1 are numbered 6 to 11, the six REG groups in control resource subset 2 are numbered 12 to 17, and the six REG groups in control resource subset 3 are numbered 18 to 23.

[0065] It should be understood that the numbering of CCEs or REGs in this application is for the purpose of facilitating the description of this application and does not limit the indexes of CCEs or REGs. Specifically, the numbers of CCEs or REGs may be or may not be the indexes of CCEs or REGs. For example, controlled resource subsets 0 to 3 each include six REGs, and the numbers of REGs in each controlled resource subset are all 0 to 5. However, the indexes of REGs in controlled resource subset 0 are 0 to 5, the indexes of REGs in controlled resource subset 1 are 6 to 11, the indexes of REGs in controlled resource subset 2 are 12 to 17, and the indexes of REGs in controlled resource subset 3 are 18 to 23.

[0066] When numbering REG groups according to numbering format 1, the numbers of REG groups included in CCEs in each control resource subset may have the following formats:

[0067] In one possible embodiment, each control resource subset includes two CCEs, and the numbers of the two CCEs included in each control resource subset may be 0 and 1. For example, the numbers of the two CCEs included in control resource subset 0 are 0 and 1, the numbers of the two CCEs included in control resource subset 1 are 0 and 1, and the numbers of the two CCEs included in control resource subset 2 are 0 and 1. 3The numbers of the two CCEs included in CCE0 are 0 and 1. The numbers of the REG groups included in CCE0 in controlled resource subset 0 are 0, 1, and 2, and the numbers of the REG groups included in CCE1 in controlled resource subset 0 are 3, 4, and 5, where all of the REG groups numbered 0 to 5 are REG groups in controlled resource subset 0. The numbers of the REG groups included in CCE0 in controlled resource subset 1 are 0, 1, and 2, and the numbers of the REG groups included in CCE1 in controlled resource subset 1 are 3, 4, and 5, where all of the REG groups numbered 0 to 5 are REG groups in controlled resource subset 1. The numbers of the REG groups included in CCE0 in controlled resource subset 2 are 0, 1, and 2, and the numbers of the REG groups included in CCE1 in controlled resource subset 2 are 3, 4, and 5, where all of the REG groups numbered 0 to 5 are REG groups in controlled resource subset 2. The REG groups included in CCE0 in control resource subset 3 are numbered 0, 1, and 2, and the REG groups included in CCE1 in control resource subset 3 are numbered 3, 4, and 5, where all of the REG groups numbered 0 to 5 are REG groups in control resource subset 3.

[0068] In another possible embodiment, the REG groups included in CCE0 in control resource subset 0 are numbered 0, 2, and 4, and the REG groups included in CCE1 in control resource subset 0 are numbered 1, 3, and 5, where the REG groups numbered 0 to 5 are all REG groups in control resource subset 0. The REG groups included in CCE0 in control resource subset 1 are numbered 0, 2, and 4, and the REG groups included in CCE1 in control resource subset 1 are numbered 1, 3, and 5, where the REG groups numbered 0 to 5 are all REG groups in control resource subset 1. The REG groups included in CCE0 in control resource subset 2 are numbered 0, 2, and 4, and the REG groups included in CCE1 in control resource subset 2 are numbered 1, 3, and 5, where the REG groups numbered 0 to 5 are all REG groups in control resource subset 2. The REG group numbers included in CCE0 in control resource subset 3 are 0, 2, and 4, and the REG group numbers included in CCE1 in control resource subset 3 are 1, 3, and 5, where all of the REG groups numbered 0 to 5 are REG groups in control resource subset 3.

[0069] When numbering REG groups according to numbering format 2, the numbers of REG groups included in CCEs in each control resource subset may have the following formats:

[0070] In one possible embodiment, the REG group numbers included in CCE0 are 0, 1, and 2, the REG group numbers included in CCE1 are 3, 4, and 5, the REG group numbers included in CCE2 are 6, 7, and 8, the REG group numbers included in CCE3 are 9, 10, and 11, the REG group numbers included in CCE4 are 12, 13, and 14, the REG group numbers included in CCE5 are 15, 16, and 17, the REG group numbers included in CCE6 are 18, 19, and 20, and the REG group numbers included 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, and the same applies to other control resource subsets, which will not be repeated here.

[0071] In another possible embodiment, the REG group numbers included in CCE0 are 0, 2, and 4, the REG group numbers included in CCE1 are 1, 3, and 5, the REG group numbers included in CCE2 are 6, 8, and 10, the REG group numbers included in CCE3 are 7, 9, and 11, the REG group numbers included in CCE4 are 12, 14, and 16, the REG group numbers included in CCE5 are 13, 15, and 17, the REG group numbers included in CCE6 are 18, 20, and 22, and the REG group numbers included in CCE7 are 19, 21, and 23. That is, the CCEs in each control resource subset are mapped in an interleaved manner, for example, CCE0 and CCE1 in control resource subset 0 are mapped in an interleaved manner, and the same applies to other control resource subsets, which will not be repeated here. Taking this example, assuming one PDCCH is mapped to four CCEs, for example, when the PDCCH is mapped to the first CCE in each control resource subset, the CCE numbers occupied by the PDCCH are 0, 2, 4, and 6, and the mapping order of the PDCCH is as shown in Figure 6. That is, when the PDCCH is mapped to CCEs, it first occupies CCE0 in control resource subset 0, then CCE2 in control resource subset 1, then CCE4 in control resource subset 2, and finally CCE6 in control resource subset 3.

[0072] Optionally, each control resource subset may be configured by the network equipment in terms of the number of PRBs included in the frequency domain and / or the number of symbols included in the time domain.

[0073] In other situations, each control resource subset includes 9 PRBs in the frequency domain and 2 symbols in the time domain. As shown in Figure 7, two consecutive REGs in the time domain constitute one REG group. Alternatively, if one CCE includes 6 REGs, one CCE includes 3 REG groups, each control resource subset includes 3 CCEs, each control resource subset includes 9 REG groups, and the first control resource set includes 12 CCEs.

[0074] In one possible embodiment, the CCEs included in control resource subset 0 are numbered 0, 1, and 2, the CCEs included in control resource subset 1 are numbered 3, 4, and 5, the CCEs included in control resource subset 2 are numbered 6, 7, and 8, and the CCEs included in control resource subset 3 are numbered 9, 10, and 11. The REG groups within each control resource subset are numbered as shown in Figure 7. Alternatively, the numbers of the REG groups included in CCE0 are 0, 3, and 6, the numbers of the REG groups included in CCE1 are 1, 4, and 7, the numbers of the REG groups included in CCE2 are 2, 5, and 8, the numbers of the REG groups included in CCE3 are 9, 12, and 15, the numbers of the REG groups included in CCE4 are 10, 13, and 16, the numbers of the REG groups included in CCE5 are 11, 14, and 17, the numbers of the REG groups included in CCE6 are 18, 21, and 24, the numbers of the REG groups included in CCE7 are 19, 22, and 25, the numbers of the REG groups included in CCE8 are 20, 23, and 26, the numbers of the REG groups included in CCE9 are 27, 30, and 33, the numbers of the REG groups included in CCE10 are 28, 31, and 34, and the numbers of the REG groups included in CCE11 are 29, 32, and 35. When one PDCCH is mapped to eight CCEs, for example, when the PDCCH is mapped to the first two CCEs of each control resource subset, the CCE numbers occupied by the PDCCH are 0, 1, 3, 4, 6, 7, 9, and 10. Optionally, the mapping order of the PDCCH is as shown in Figure 7, that is, first occupying CCE0 and CCE1 in control resource subset 0, then CCE3 and CCE4 in control resource subset 1, then CCE6 and CCE7 in control resource subset 2, and finally CCE9 and CCE10 in control resource subset 3. Here, the CCE numbers for carrying the PDCCH in each control resource subset are consecutive.

[0075] In another possible embodiment, the CCEs included in control resource subset 0 are numbered 0, 1, and 2, the CCEs included in control resource subset 2 are numbered 3, 4, and 5, the CCEs included in control resource subset 1 are numbered 6, 7, and 8, and the CCEs included in control resource subset 3 are numbered 9, 10, and 11. The REG groups within each control resource subset are numbered as shown in FIG. 8 . Alternatively, the numbers of the REG groups included in CCE0 are 0, 3, and 6, the numbers of the REG groups included in CCE1 are 1, 4, and 7, the numbers of the REG groups included in CCE2 are 2, 5, and 8, the numbers of the REG groups included in CCE3 are 18, 21, and 24, the numbers of the REG groups included in CCE4 are 19, 22, and 25, the numbers of the REG groups included in CCE5 are 20, 23, and 26, the numbers of the REG groups included in CCE6 are 9, 12, and 15, the numbers of the REG groups included in CCE7 are 10, 13, and 16, the numbers of the REG groups included in CCE8 are 11, 14, and 17, the numbers of the REG groups included in CCE9 are 27, 30, and 33, the numbers of the REG groups included in CCE10 are 28, 31, and 34, and the numbers of the REG groups included in CCE11 are 29, 32, and 35. When one PDCCH is mapped to eight CCEs, for example, when the PDCCH is mapped to the first two CCEs of each control resource subset, the CCE numbers occupied by the PDCCH are 0, 1, 3, 4, 6, 7, 9, and 10, and optionally, the mapping order of the PDCCH is as shown in Figure 8. Here, the numbers of the CCEs for carrying the PDCCH in each control resource subset are consecutive.

[0076] In another possible embodiment, the number of the first transmission unit included in the kth control resource subset is k+r*K, where k is a value from 0 to K-1 and r is a value from 0 to R-1. Taking K=4, N=4 and R=3 as an example, the CCEs included in control resource subset 0 are numbered 0, 4 and 8, the CCEs included in control resource subset 1 are numbered 1, 5 and 9, the CCEs included in control resource subset 2 are numbered 2, 6 and 10, and the CCEs included in control resource subset 3 are numbered 3, 7 and 11, i.e., the CCEs are interleaved and mapped in the subbands. The REG groups in each control resource subset are numbered as shown in FIG. Alternatively, the numbers of the REG groups included in CCE0 are 0, 3, and 6, the numbers of the REG groups included in CCE1 are 9, 12, and 15, the numbers of the REG groups included in CCE2 are 18, 21, and 24, the numbers of the REG groups included in CCE3 are 27, 30, and 33, the numbers of the REG groups included in CCE4 are 1, 4, and 7, the numbers of the REG groups included in CCE5 are 10, 13, and 16, the numbers of the REG groups included in CCE6 are 19, 22, and 25, the numbers of the REG groups included in CCE7 are 28, 31, and 34, the numbers of the REG groups included in CCE8 are 2, 5, and 8, the numbers of the REG groups included in CCE9 are 11, 14, and 17, the numbers of the REG groups included in CCE10 are 20, 23, and 26, and the numbers of the REG groups included in CCE11 are 29, 32, and 35. When one PDCCH is mapped to eight CCEs, for example, when the PDCCH is mapped to the first two CCEs in each control resource subset, the CCE numbers occupied by the PDCCH are 0, 1, 2, 3, 4, 5, 6, and 7, and optionally, the mapping order of the PDCCH is as shown in Figure 9. That is, when the PDCCH is mapped to CCEs, it first occupies the first CCE in each control resource subset, and then occupies the second CCE in each control resource subset.Alternatively, the mapping order of the PDCCH may be other orders, for example, the number order of the CCEs occupied by the PDCCH is 0, 4, 1, 5, 2, 6, 3, 7, and for example, the number order of the REG groups included in the CCEs 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.

[0077] In another possible embodiment, the CCEs included in control resource subset 0 are numbered 0, 4, and 8, the CCEs included in control resource subset 2 are numbered 1, 5, and 9, the CCEs included in control resource subset 1 are numbered 2, 6, and 10, and the CCEs included in control resource subset 3 are numbered 3, 7, and 11. The REG groups within each control resource subset are numbered as shown in Figure 10. Alternatively, the numbers of the REG groups included in CCE0 are 0, 3, and 6, the numbers of the REG groups included in CCE1 are 18, 21, and 24, the numbers of the REG groups included in CCE2 are 9, 12, and 15, the numbers of the REG groups included in CCE3 are 27, 30, and 33, the numbers of the REG groups included in CCE4 are 1, 4, and 7, the numbers of the REG groups included in CCE5 are 19, 22, and 25, the numbers of the REG groups included in CCE6 are 10, 13, and 16, the numbers of the REG groups included in CCE7 are 28, 31, and 34, the numbers of the REG groups included in CCE8 are 2, 5, and 8, the numbers of the REG groups included in CCE9 are 20, 23, and 26, the numbers of the REG groups included in CCE10 are 11, 14, and 17, and the numbers of the REG groups included in CCE11 are 29, 32, and 35. When one PDCCH is mapped to eight CCEs, for example, when the PDCCH is mapped to the first two CCEs of each control resource subset, the numbers of the CCEs occupied by the PDCCH are 0, 1, 2, 3, 4, 5, 6, and 7, and optionally, the mapping order of the PDCCH is as shown in Figure 10. Alternatively, the mapping order of the PDCCH may be other orders, for example, the order of the numbers of the CCEs occupied by the PDCCH is 0, 4, 1, 5, 2, 6, 3, and 7, and for example, the order of the numbers of the REG groups included 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, and 34.

[0078] In a further aspect, each control resource subset includes eight PRBs in the frequency domain and three symbols in the time domain. As shown in FIG. 11, three consecutive REGs in the time domain constitute one REG group. Alternatively, one CCE includes six REGs, one CCE includes two REG groups, each control resource subset includes four CCEs, each control resource subset includes eight REG groups, and the first control resource set includes 16 CCEs. Alternatively, the CCEs included in control resource subset 0 are numbered 0, 1, 2, and 3, the CCEs included in control resource subset 1 are numbered 4, 5, 6, and 7, the CCEs included in control resource subset 2 are numbered 8, 9, 10, and 11, and the CCEs included in control resource subset 3 are numbered 12, 13, 14, and 15. The REG groups within each control resource subset are numbered as shown in FIG. 11. In one possible embodiment, the numbers of the REG groups included in CCE0 are 0 and 4, the numbers of the REG groups included in CCE1 are 1 and 5, the numbers of the REG groups included in CCE2 are 2 and 6, the numbers of the REG groups included in CCE3 are 3 and 7, the numbers of the REG groups included in CCE4 are 8 and 12, the numbers of the REG groups included in CCE5 are 9 and 13, the numbers of the REG groups included in CCE6 are 10 and 14, and the numbers of the REG groups included in CCE7 are 11 and 15. The numbers of the REG groups contained in CCE8 are 16 and 20, the numbers of the REG groups contained in CCE9 are 17 and 21, the numbers of the REG groups contained in CCE10 are 18 and 22, the numbers of the REG groups contained in CCE11 are 19 and 23, the numbers of the REG groups contained in CCE12 are 24 and 28, the numbers of the REG groups contained in CCE13 are 25 and 29, the numbers of the REG groups contained in CCE14 are 26 and 30, and the numbers of the REG groups contained in CCE15 are 27 and 31.When one PDCCH is mapped to eight CCEs, for example, when the PDCCH is mapped to the first two CCEs of each control resource subset, the numbers of the CCEs occupied by the PDCCH are 0, 1, 4, 5, 8, 9, 12, and 13, and the mapping order of the PDCCH is as shown in Figure 11, where the numbers of the CCEs carrying the PDCCH in each control resource subset are consecutive.

[0079] It can be understood that the mapping relationship in this application may be a relative mapping relationship, and may actually have an offset value, but this application is not limited thereto.

[0080] It should be understood that the above mapping relationship between CCEs and REG groups and the process of mapping PDCCHs to CCEs are merely exemplary descriptions and are not specifically limited, and other mapping forms may be used. Regarding the above interleaved mapping, a specific interleaving form is not limited. In addition, the above interleaving means may also be used for transmitting an uplink control channel.

[0081] Compared with interleaving all resources in CORESET, the control channel transmission method according to this embodiment interleaves CCEs in control resource subsets in subbands, improving the interleaving effect since the granularity of the control resource subset is smaller than that of CORESET. If some subbands cannot be transmitted due to LBT failure, the gain of interleaving will not be affected.

[0082] In the above embodiment, a control resource is configured in each subband among a plurality of subbands included in a BWP, and each subband is used to transmit a PDCCH. However, in some cases, each subband may transmit the same PDCCH, resulting in significant redundancy in the PDCCH transmission and wasting resources. To address this issue, this embodiment provides an improved solution: a base station configures a control resource in each subband among a plurality of subbands included in a BWP, but when actually transmitting a PDCCH, it transmits the PDCCH using only the control resource of one subband, and the control resource of the other subbands is used to transmit data, thereby improving resource utilization in the unlicensed spectrum. This solution will be described below with reference to specific embodiments.

[0083] As shown in FIG. 12, the BWP configured by the system for a terminal device includes four subbands, i.e., subbands 0 to 3. In the configuration phase, the network device configures control resources of the same resource size in each subband. In the data preparation phase, the network device maps the PDCCH to a CCE corresponding to the control resource in one subband. Before transmitting the PDCCH to the terminal device, the network device determines which of the four subbands will acquire a channel usage right, and the subband that will acquire a channel usage right is specifically a subband for which LBT is successful. Assume that subband 0 and subband 1 have not acquired a channel usage right, and subband 2 and subband 3 have acquired a channel usage right. In this case, the network device may select the subband with the smallest index from subband 2 or subband 3 to transmit the PDCCH, or may select the subband with the largest index from subband 2 or subband 3 to transmit the PDCCH. For example, assume that the network device selects subband 2 to transmit the PDCCH, and the candidate control resource in subband 2 is originally mapped to a physical downlink shared channel (PDSCH), in which case a hole is punched in the corresponding part of the PDSCH.

[0084] The control channel transmission method according to this embodiment transmits the PDCCH using only the control resources of one subband, and the control resources of the other subbands are used to transmit data, thereby improving resource utilization in the unlicensed spectrum.

[0085] For a terminal device, the terminal device can receive a control channel according to a first control resource set, which may specifically be a PDCCH, where the first control resource set is consistent with the first control resource set in the above embodiment and will not be repeated here. Optionally, the BWP configured by the system for the terminal device may include N subbands, and the first control resource set may be located in K subbands among the N subbands, where N and K are positive integers and N≧K≧2.

[0086] Taking N=4 and K=4 as an example, as shown in FIG. 13, the network device allocates control resources to each of four subbands, and a set of control resources in each of the four subbands is a first control resource set, that is, the first control resource set is located in the four subbands. When transmitting a PDCCH, the network device selects a subband to obtain a channel use right and transmits the PDCCH to the terminal device. Before the start of a downlink transmission opportunity for the network device, the terminal device receives the control channel according to the first control resource set, that is, the terminal device needs to detect control resources in the four subbands to receive the PDCCH. After the start of a downlink transmission opportunity for the network device, the terminal device determines the number of subbands to be used for communication among the four subbands. For example, subband 0 does not obtain a channel use right and does not perform communication, while subband 1, subband 2, and subband 3 obtain a channel use right, so the number of subbands to be used for communication is three. It should be understood that this is merely a general description and the number of subbands that do not obtain channel use rights is not limited. In this case, the terminal device determines that the number of subbands used for communication is smaller than the number of subbands included in the BWP, that is, the subbands used for communication in the BWP do not include at least one of the four subbands. In this case, the terminal device does not receive a control channel according to the first control resource set, but can receive a PDCCH based on the control resources in subband 1, subband 2, and subband 3. Here, the set consisting of the control resources in subband 1, subband 2, and subband 3 is referred to as a second control resource set. That is, the control resources included in the second control resource set are fewer than the control resources included in the first control resource set.

[0087] 13, a downlink transmission opportunity of the network device includes multiple time units, for example, time unit n to time unit n+6. If the terminal device determines in the first time unit of the downlink transmission opportunity, for example, time unit n, that the subbands used for communication include subband 1, subband 2, and subband 3, but not subband 0, then in subsequent time units (for example, time units n+1, n+2, etc.), it detects the PDCCH in the control resources included in the second control resource set, rather than the control resources included in the first control resource set.

[0088] It can be understood that when the terminal device determines the subbands to be used for communication in a certain downlink transmission opportunity of the network device, a certain processing time is required, and therefore, there may be a certain time interval before the terminal device switches from receiving the PDCCH based on the first control resource set to receiving the PDCCH based on the second control resource set. For example, as shown in Figure 13, the terminal device starts receiving the PDCCH based on the second control resource set from time unit n+2. Optionally, the time interval is transmitted to the terminal device by the network device via indication information.

[0089] Specifically, the terminal equipment can determine the subband to be used for communication in a certain downlink transmission opportunity of the network equipment in several possible forms:

[0090] In one possible embodiment, the terminal device receives a PDCCH transmitted by a network device, the PDCCH being used to transmit slot format information (Slot Format Indicator, SFI), the SFI including indication information of subbands used for communication in the BWP, and the terminal device determines the subbands used for communication in the BWP based on the indication information.

[0091] In another possible embodiment, the terminal device determines the subbands to be used for communication in the BWP by detecting a reference signal in each of the subbands included in the BWP. For example, if the terminal device detects a reference signal in subband 1, the terminal device determines that subband 1 is used for communication. If the terminal device does not detect a reference signal in subband 0, the terminal device determines that subband 0 is not used for communication.

[0092] In another possible embodiment, the terminal device receives first indication information reported by the network device, the first indication information instructing the terminal device to receive a control channel according to a second control resource set, so that the terminal device can switch from receiving a PDCCH based on the first control resource set to receiving a PDCCH based on the second control resource set according to the first indication information. Optionally, the first indication information is physical layer signaling.

[0093] Optionally, the network device can also send second indication information to the terminal device, where the second indication information is used to indicate the location of the first control resource set, so that the terminal device can determine the first control resource set before receiving the PDCCH based on the first control resource set. Optionally, the second indication information is Radio Resource Control (RRC) signaling.

[0094] Optionally, the network device can also send third indication information to the terminal device, where the third indication information is used to indicate the location of the second control resource set, so that the terminal device can determine the second control resource set before receiving the PDCCH based on the second control resource set. Optionally, the third indication information is RRC signaling or physical layer signaling.

[0095] In the control channel transmission method according to this embodiment, the terminal device transmits the subband occupied by the control resource during actual transmission. number K is the subband occupied by the control resources allocated by the network equipment. number After determining that the number of subbands is less than N, the number of subbands actually transmitted is number By switching to receiving the PDCCH based on K, the power consumption of the terminal device can be reduced.

[0096] For network equipment, the following realizations are possible accordingly:

[0097] In one implementation, the network equipment prepares mapping of the control channel according to a first control resource set, and when the network equipment determines (e.g., by a channel detection result) that the subbands used for communication in the first BWP do not include at least one of the K subbands, the network equipment still prepares mapping of the control channel according to the first control resource set, but transmits the control channel according to a second control resource set. Alternatively, when the network equipment prepares mapping of the PDCCH, the mapping order between the PDCCH and the CCE or REG does not change depending on the difference in the subbands actually transmitted (e.g., the network equipment always maps the PDCCH according to the first control resource set, or the network equipment repeatedly transmits the PDCCH on each subband of the K subbands).

[0098] In response, the terminal device determines the subbands occupied by the control resources during actual transmission. number P is the subband occupied by the control resources allocated by the network equipment. numberIf it is determined that the number of control resource sets is smaller than K, the terminal device detects the PDCCH in the same manner according to the first control resource set and the second control resource set. Alternatively, the mapping order between the PDCCH and the CCE or REG determined by the terminal device does not change depending on the subbands actually transmitted. The advantage of this method is that the terminal device does not make an error in recognizing the rate matching of the PDCCH and is easy to implement.

[0099] In another implementation, the network equipment prepares mapping of the control channel according to a first control resource set by default, and after the network equipment determines (for example, by a channel detection result) that the subbands used for communication in the first BWP do not include at least one of the K subbands and satisfy the time interval, the network equipment prepares mapping of the control channel according to a second control resource set and transmits the control channel according to the second control resource set. Alternatively, when the network equipment prepares mapping of the PDCCH, the mapping order between the PDCCH and the CCE or REG changes according to differences in the subbands actually transmitted.

[0100] Accordingly, the terminal device detects the PDCCH in a different manner according to the first control resource set than according to the second control resource set, for example, the terminal device detects the PDCCH in a different manner according to the first control resource set by default, and the terminal device detects the PDCCH in a different manner according to the second control resource set. number P is the subband occupied by the control resource allocated by the network equipment number After determining that the second control resource set is smaller than K and satisfies the time interval, the terminal device detects the PDCCH according to the second control resource set. Alternatively, the mapping order between the PDCCH and the CCE or REG determined by the terminal device varies depending on the subbands actually transmitted. The advantage of this measure is that redundant transmission is reduced and PDCCH performance is improved. However, if the terminal device determines that the subbands actually transmitted number If P is not determined correctly, there is a risk that an error will occur in the rate matching recognition of the PDCCH, and furthermore, demodulation may fail.

[0101] It should be noted that, for clarity, uppercase and lowercase letters in the embodiments of the present application each represent a different meaning, for example, uppercase "K" represents the number of control resource subsets included in the first control resource set, and lowercase "k" represents the kth one among the K control resource subsets, where the value of k is 0 to K-1.

[0102] FIG. 14 is a structural schematic diagram of a network device according to the present invention. As shown in FIG. 14, the network device 140 includes: a processing module 141 used for mapping a first control channel to S first transmission units included in a first control resource set, where the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located in at least one subband among the N subbands, the first transmission unit is a minimum unit for transmitting a control channel, S and N are positive integers, S≧1, N≧2; a transmitting module 142 for transmitting the first control channel to a terminal device.

[0103] The network device according to this embodiment is used to implement the technical solution on the network device side in any of the above method embodiments, and the realization principles and technical effects thereof are similar, and will not be repeated here.

[0104] Based on the embodiment shown in Figure 14 above, the first control resource set includes K control resource subsets, each of the K control resource subsets includes R first transmission units, each of the K control resource subsets is located in one subband among the N subbands, the K control resource subsets have a one-to-one correspondence with the K subbands among the N subbands, K and R are positive integers, K≦N, K*R≧S.

[0105] Optionally, the first control resource set includes K*R first transmission units, where the number of the first transmission units included in the kth control resource subset is k*R+r, where k is a value from 0 to K-1, and r is a value from 0 to R-1.

[0106] Optionally, the first control resource set includes K*R first transmission units, where the number of the first transmission units included in the kth control resource subset is k+r*K, where k is a value from 0 to K-1, and r is a value from 0 to R-1.

[0107] Optionally, the first transmission unit includes T resource unit groups, and the R first transmission units include R*T resource unit groups, where the number of the resource unit group included in the rth first transmission unit is r*T+t, where r is a value from 0 to R-1, and t is a value from 0 to T-1.

[0108] Optionally, the first transmission unit includes T resource unit groups, and the R first transmission units include R*T resource unit groups, where the number of the resource unit group included in the rth first transmission unit is r+t*R, where r is a value from 0 to R-1, and t is a value from 0 to T-1.

[0109] Optionally, the numbers of at least two of the S first transmission units are non-consecutive, where S≧2.

[0110] Optionally, the first control resource set includes K control resource subsets, where S=K*M, K and M are positive integers, and K≦N, M≧1. When mapping the first control channel to the S first transmission units included in the first control resource set, the processing module 141 is used to first occupy M first transmission units with consecutive numbers in the k-th control resource subset among the K control resource subsets, and then to occupy M first transmission units with consecutive numbers in the k+1-th control resource subset among the K control resource subsets, where k is a value from 0 to K−1.

[0111] Optionally, the first control resource set includes K control resource subsets, where S=K*M, K and M are positive integers, and K≦N, M≧1. When mapping the first control channel to the S first transmission units included in the first control resource set, the processing module 141 is used to occupy m first transmission units in each control resource subset among the K control resource subsets, and then occupy m+1 first transmission units in each control resource subset when mapping the first control channel, where m is a value from 0 to M−1.

[0112] Optionally, the S first transmission units are located in one subband among the N subbands.

[0113] Optionally, the one sub-band is a sub-band that obtains a channel use right.

[0114] Optionally, before transmitting the first control channel to the terminal equipment, the processing module 141 is further used to determine a subband that will acquire channel use rights among the N subbands, and when transmitting the first control channel to the terminal equipment, the transmitting module 142 is specifically used to transmit the first control channel to the terminal equipment in a subband that will acquire channel use rights among the N subbands.

[0115] An embodiment of the present application provides a terminal device, the terminal device including: a receiving module for receiving a first control channel transmitted by a network device and mapped to S first transmission units included in a first control resource set, where the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located in at least one subband among the N subbands, the first transmission unit is a minimum unit for transmitting a control channel, S and N are positive integers, S≧1, N≧2.

[0116] The terminal device according to this embodiment is for implementing the technical solution on the terminal device side in any of the above method embodiments, and the realization principles and technical effects thereof are similar, and will not be repeated here.

[0117] Furthermore, the first control resource set includes K control resource subsets, each of which includes R first transmission units, and each of which is located in one subband among the N subbands, and the K control resource subsets correspond one-to-one to the K subbands among the N subbands, where K and R are positive integers, K≦N, and K*R≧S.

[0118] Optionally, the first control resource set includes K*R first transmission units, where the number of the first transmission units included in the kth control resource subset is k*R+r, where k is a value from 0 to K-1, and r is a value from 0 to R-1.

[0119] Optionally, the first control resource set includes K*R first transmission units, where the number of the first transmission units included in the kth control resource subset is k+r*K, where k is a value from 0 to K-1, and r is a value from 0 to R-1.

[0120] Optionally, the first transmission unit includes T resource unit groups, and the R first transmission units include R*T resource unit groups, where the number of the resource unit group included in the rth first transmission unit is r*T+t, where r is a value from 0 to R-1, and t is a value from 0 to T-1.

[0121] Optionally, the first transmission unit includes T resource unit groups, and the R first transmission units include R*T resource unit groups, where the number of the resource unit group included in the rth first transmission unit is r+t*R, where r is a value from 0 to R-1, and t is a value from 0 to T-1.

[0122] Optionally, the numbers of at least two of the S first transmission units are non-consecutive, where S≧2.

[0123] Optionally, the S first transmission units are located in one subband among the N subbands.

[0124] Optionally, the one sub-band is a sub-band that obtains a channel use right.

[0125] FIG. 15 is another structural schematic diagram of a terminal device according to the present application. As shown in FIG. 15, the terminal device 150 includes: a receiving module 151 used for receiving a control channel according to a first control resource set, where the first control resource set is a control resource set in a first bandwidth portion BWP, the first BWP includes N subbands, the first control resource set is located on K subbands in the N subbands, N and K are positive integers, and N≧K≧2; a processing module 152 for determining that subbands used for communication in the first BWP do not include at least one subband among the K subbands; The receiving module 151 further includes a processing module 152, which, when determining that the subbands used for communication in the first BWP do not include at least one subband among the K subbands, is used to receive a control channel according to a second control resource set, the second control resource set being located on P subbands among the K subbands, where P is a positive integer, and 1≦P <Kである。

[0126] The terminal device according to this embodiment is for implementing the technical solution on the terminal device side in any of the above method embodiments, and the realization principles and technical effects thereof are similar, and will not be repeated here.

[0127] Furthermore, the second control resource set includes resources located on the P subbands in the first control resource set.

[0128] Optionally, the processing module 152 is specifically used for determining subbands to be used for communication in the first BWP based on a first downlink control channel transmitted by a network device, and determining, based on the subbands used for the communication, that the subbands to be used for communication in the first BWP do not include at least one subband among the K subbands.

[0129] Optionally, the first downlink control channel is used to transmit slot format information SFI, the SFI including an indication of subbands used for communication in the first BWP.

[0130] Optionally, the processing module 152 is specifically used to determine, based on detection of the presence of a reference signal in each subband among the K subbands, that the subbands used for communication in the first BWP do not include at least one subband among the K subbands.

[0131] Optionally, the receiving module 151 is further used for receiving first instruction information sent by a network equipment, and the first instruction information is used for instructing the terminal equipment to receive a control channel according to the second control resource set.

[0132] Optionally, the receiving module 151 is further used for receiving second instruction information sent by the network equipment, and the processing module 152 is further used for determining the first control resource set based on the second instruction information.

[0133] Optionally, the receiving module 151 is further used for receiving third instruction information sent by the network equipment, and the processing module 152 is further used for determining the second control resource set based on the third instruction information.

[0134] FIG. 16 is another structural schematic diagram of a terminal device according to the present application. As shown in FIG. 16, the terminal device 160 includes: The device includes a processor 161, a memory 162, and an interface 163 for communicating with a network device; The memory 162 stores computer-executable instructions, The processor 161 executes the computer-executable instructions stored in the memory 162, causing the processor 161 to implement the technical solutions on the terminal device side in any of the above method embodiments.

[0135] FIG. 16 shows a simple design of a terminal device. In the embodiment of the present application, the number of processors and memories in the terminal device is not limited, and FIG. 16 only takes the number 1 as an example.

[0136] FIG. 17 is another structural diagram of a network device according to the present invention. As shown in FIG. 17, the network device 170 includes: The device includes a processor 171, a memory 172, and an interface 173 for communicating with a terminal device; The memory 172 stores computer-executable instructions, The processor 171 executes the computer-executable instructions stored in the memory 172, causing the processor 171 to implement the technical solutions on the network device side in any of the above method embodiments.

[0137] FIG. 17 is a simple design of a network device. In the embodiment of the present application, the number of processors and memories in the network device is not limited, and FIG. 17 takes only one as an example.

[0138] In one specific implementation of the terminal device as shown in Figure 16 above and the network device described in Figure 17, the memory, processor and interface can be connected by a bus, and optionally, the memory may be integrated within the processor.

[0139] An embodiment of the present application also provides a computer-readable storage medium having computer-executable instructions stored thereon, which, when executed by a processor, is used to realize the technical solution of the terminal device in any of the above method embodiments.

[0140] An embodiment of the present application also provides a computer-readable storage medium having computer-executable instructions stored thereon, which, when executed by a processor, is used to realize the technical solution of the network equipment in any of the above method embodiments.

[0141] An embodiment of the present application also provides a program for implementing the technical solutions of the terminal device in any of the above method embodiments when executed by a processor.

[0142] An embodiment of the present application also provides a program for implementing the technical solution of the network device in any of the above method embodiments when executed by a processor.

[0143] Alternatively, the processor may be a chip.

[0144] The embodiments of the present application also provide a computer program product including program instructions for implementing the technical solutions of the terminal device in any of the above method embodiments.

[0145] An embodiment of the present application also provides a computer program product including program instructions for implementing the technical solutions of the network equipment in any of the above method embodiments.

[0146] An embodiment of the present application also provides a chip including a processing module and a communication interface, where the processing module can implement the technical solutions at the terminal device side in any of the above method embodiments.

[0147] Furthermore, the chip also includes a storage module (e.g., a memory), the storage module is used to store instructions, and the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to implement the technical solution on the terminal device side in any of the above method embodiments.

[0148] An embodiment of the present application also provides a chip including a processing module and a communication interface, where the processing module can implement the technical solutions on the network equipment side in any of the above method embodiments.

[0149] Furthermore, the chip also includes a storage module (e.g., a memory), the storage module is used to store instructions, and the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to implement the technical solution on the network equipment side in any of the above method embodiments.

[0150] In some embodiments of the present application, it should be understood that the disclosed devices and methods may be implemented in other forms. For example, the device embodiments described above are merely exemplary, and the division of the modules is a division of logical functions only. In actual implementation, other division forms may be used. For example, multiple modules may be combined or integrated into another system, or some features may not be implemented or performed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections via several interfaces or modules, and may be in electrical, mechanical, or other forms.

[0151] In the specific implementation of the above terminal equipment and network equipment, it should be understood that the processor may be a central processing unit (abbreviated as CPU), other general-purpose processors, digital signal processors (abbreviated as DSP), application specific integrated circuits (abbreviated as ASIC), etc. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc. The relevant steps of combining the methods disclosed herein may be directly embodied as being performed and completed by a hardware processor, or as being performed and completed by a combination of hardware and software module groups in a processor.

[0152] All or part of the steps of the above method embodiments can be completed by hardware associated with program instructions. The program may be stored in a readable memory. When the program is executed, it performs the steps including the above method embodiments, and the memory (storage medium) includes read-only memory (ROM), RAM, flash memory, hard disk, solid-state hard disk, magnetic tape, floppy disk, optical disk, and any combination thereof.

Claims

1. A control channel transmission method applied to a terminal device, the method comprising: Detecting a physical downlink control channel (PDCCH) according to a first control resource set, where the first control resource set is determined based on second indication information sent by a network device, the first control resource set is a control resource set in a first bandwidth portion (BWP), the first BWP includes N subbands, the first control resource set is located on K subbands among the N subbands, N and K are positive integers, and N≧K≧2; detecting a PDCCH according to a second control resource set when it is determined that the subbands corresponding to the first control resource set include subbands not used for communication, the second control resource set being determined based on third indication information transmitted by the network device, the subbands corresponding to the second control resource set including P subbands used for communication in the K subbands, P being a positive integer, and 1≦P<K; The second control resource set includes resources located on P subbands in the first control resource set.

2. A control channel transmission method comprising:

2. Determining that the subbands corresponding to the first control resource set include subbands not used for communication includes: determining a subband to be used for communication in the first BWP based on a first downlink control channel transmitted by the network equipment; determining that subbands corresponding to the first control resource set include subbands that are not included in subbands used for communication in the first BWP.

2. The method of claim 1 .

3. The first downlink control channel is used to transmit slot format information, and the slot format information includes an indication of subbands used for communication in the first BWP.

3. The method of claim 2.

4. Determining that the subbands corresponding to the first control resource set include subbands not used for communication includes: receiving first instruction information transmitted by the network equipment, the first instruction information being used to instruct the terminal equipment to receive a PDCCH according to the second control resource set; The method according to any one of claims 1 to 3.

5. A terminal device, a receiving module for detecting a physical downlink control channel (PDCCH) according to a first control resource set, where the first control resource set is determined based on second indication information sent by a network device, the first control resource set is a control resource set in a first bandwidth portion (BWP), the first BWP includes N subbands, the first control resource set is located on K subbands among the N subbands, N and K are positive integers, and N≧K≧2; and a processing module for detecting a PDCCH according to a second control resource set when determining that subbands corresponding to the first control resource set include subbands not used for communication, the second control resource set being determined based on third indication information transmitted by the network device, and the subbands corresponding to the second control resource set include P subbands used for communication in the K subbands, where P is a positive integer and 1≦P<K; The second control resource set includes resources located on P subbands in the first control resource set. A terminal device characterized by:

6. The processing module specifically includes: determining a subband to be used for communication in the first BWP based on a first downlink control channel transmitted by the network equipment; determining that subbands corresponding to the first control resource set include subbands that are not included in subbands used for communication in the first BWP; 6. The terminal device according to claim 5.

7. The first downlink control channel is used to transmit slot format information, and the slot format information includes an indication of subbands used for communication in the first BWP.

7. The terminal device according to claim 6.

8. The receiving module is further used for receiving first indication information sent by the network equipment, the first indication information being used for instructing the terminal equipment to receive a PDCCH according to the second control resource set. The terminal device according to any one of claims 5 to 7.

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