US20200120659A1 - Information Transmission Method, Terminal Device, And Network Device - Google Patents

Information Transmission Method, Terminal Device, And Network Device Download PDF

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Publication number
US20200120659A1
US20200120659A1 US16/715,881 US201916715881A US2020120659A1 US 20200120659 A1 US20200120659 A1 US 20200120659A1 US 201916715881 A US201916715881 A US 201916715881A US 2020120659 A1 US2020120659 A1 US 2020120659A1
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Prior art keywords
time
regs
frequency domain
frequency
control channel
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US16/715,881
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Jianguo Wang
Jianqin Liu
Chuanfeng He
Xu Zhang
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of US20200120659A1 publication Critical patent/US20200120659A1/en
Assigned to HUAWEI TECHNOLOGIES CO., LTD. reassignment HUAWEI TECHNOLOGIES CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZHANG, XU, LIU, JIANQIN, WANG, JIANGUO, HE, CHUANFENG
Priority to US17/876,248 priority Critical patent/US11700101B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/0406—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

Definitions

  • This application relates to the communications field, and more specifically, to an information transmission method, a terminal device, and a network device in the communications field.
  • LTE long term evolution
  • 3rd generation partnership project 3rd generation partnership project
  • 3GPP 3rd generation partnership project
  • LTE systems are widely deployed within a range of a frequency band that is less than 6 GHz.
  • a carrier frequency of the 5 th generation wireless access system is higher than that of the 4th generation wireless access system, and a to-be-selected carrier frequency range includes 30 GHz, 60 GHz, and the like.
  • a synchronization signal block (synchronization signal block, SS block) needs to be detected, and the synchronization signal block includes a synchronization signal and a broadcast channel.
  • the terminal device receives broadcast information that is carried on the broadcast channel, to obtain a time-frequency resource of a control channel.
  • the broadcast information carries system bandwidth information, and the system bandwidth information is used to indicate a frequency domain resource of a control channel resource set.
  • a new-generation wireless communications system developed for a 5th generation (5-Generation, 5G) mobile communications technology is referred to as a new radio (new radio, NR).
  • the NR supports a larger bandwidth and more services.
  • the system bandwidth information is not included in the broadcast information, and therefore, user equipment cannot obtain inbound bandwidth information.
  • This application provides an information transmission method, a terminal device, and a network device.
  • Configuration information of a control channel resource set is used to indicate a time-frequency resource of a control channel
  • the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks.
  • the terminal device may obtain a better frequency diversity gain, to improve transmission efficiency.
  • an information transmission method includes: receiving, by a terminal device, configuration information of a control channel resource set, where the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks; determining, by the terminal device, a time-frequency resource of the control channel based on the configuration information; and receiving, by the terminal device, control information on the time-frequency resource of the control channel.
  • the configuration information of the control channel resource set is used to indicate the time-frequency resource of the control channel
  • the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks. Therefore, even if a relatively large quantity of signal paths are generated in a channel environment, the terminal device may obtain a better frequency diversity gain when receiving the control information on the control channel, to improve transmission efficiency.
  • the time-frequency resource block includes at least one resource element group REG set, and the REG set includes a plurality of REGs that are consecutive or adjacent in time domain or in frequency domain.
  • the interval between two adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REGs or a frequency domain resource corresponding to an integer quantity of REG sets.
  • offset that is of a frequency domain center location of the resource set and that is relative to a frequency domain center location of a synchronization signal block is predefined, or is indicated by the configuration information; and the synchronization signal block includes the configuration information.
  • At least one of the quantity of time-frequency resource blocks and the interval between two adjacent time-frequency resource blocks is predefined.
  • At least one of a quantity of REG sets included in the time-frequency resource block and a quantity of REGs included in the REG set is predefined, or is indicated by the configuration information.
  • an offset that is from the frequency domain center location of the synchronization signal block to the frequency domain center location of the resource set is determined based on a cell identity in the synchronization signal block
  • an information transmission method includes: generating, by a network device, configuration information of a control channel resource set, where the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks; and sending, by the network device, the configuration information.
  • the network device uses the configuration information of the control channel resource set to indicate the time-frequency resource of the control channel, the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks. Therefore, even if a relatively large quantity of signal paths are generated in a channel environment, a terminal device may obtain a better frequency diversity gain when receiving the control information on the control channel, to improve transmission efficiency.
  • the time-frequency resource block includes at least one resource element group REG set, and the REG set includes a plurality of REGs that are consecutive or adjacent in time domain or in frequency domain.
  • the interval between two adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REGs or a frequency domain resource corresponding to an integer quantity of REG sets.
  • offset that is of a frequency domain center location of the source set and that is relative to a frequency domain center location of a synchronization signal block is predefined, or is indicated by the configuration information; and the synchronization signal block includes the configuration information.
  • At least one of the quantity of time-frequency resource blocks and the interval between two adjacent time-frequency resource blocks is predefined.
  • At least one of a quantity of REG sets included in the time-frequency resource block and a quantity of REGs included in the REG set is predefined, or is indicated by the configuration information.
  • an offset that is from the frequency domain center location of the synchronization signal block to the frequency domain center location of the resource set is determined based on a cell identity in the synchronization signal block.
  • a terminal device includes a processor, a memory, and a transceiver that are configured to support the terminal device in performing a corresponding function in the foregoing method.
  • the processor, the memory, and the transceiver are connected.
  • the memory stores instructions.
  • the transceiver, driven by the processor, is configured to send or receive a specific signal.
  • the processor is configured to invoke the instructions to implement the information transmission method in the first aspect and the various implementations of the first aspect.
  • a terminal device includes a processing module, a storage module, and a transceiver module that are configured to support the terminal device in performing a function of the terminal device in any one of the first aspect or the possible implementations of the first aspect.
  • the function may be implemented by hardware, or may be implemented by corresponding software executed by hardware.
  • the hardware or software includes one or more modules corresponding to the function.
  • a network device includes a processor, a memory, and a transceiver that are configured to support the network device in performing a corresponding function in the foregoing method.
  • the processor, the memory, and the transceiver are connected.
  • the memory stores instructions.
  • the transceiver, driven by the processor, is configured to send or receive a specific signal.
  • the processor is configured to invoke the instructions to implement the information transmission method in the second aspect and the various implementations of the second aspect.
  • a network device includes a processing module, a storage module, and a transceiver module that are configured to support the network device in performing a function of the network device in any one of the second aspect or the possible implementations of the second aspect.
  • the function may be implemented by hardware, or may be implemented by corresponding software executed by hardware.
  • the hardware or software includes one or more modules corresponding to the function.
  • a communications system includes the terminal device provided in the third aspect or the fourth aspect, and the network device provided in the fifth aspect or the sixth aspect.
  • the communications system may implement the information transmission method provided in the first aspect and the second aspect.
  • a computer readable storage medium configured to store a computer program.
  • the computer program includes instructions used to perform the method in any one of the first aspect or the possible implementations of the first aspect.
  • a computer readable storage medium configured to store a computer program.
  • the computer program includes instructions used to perform the method in any one of the second aspect or the possible implementations of the second aspect.
  • FIG. 1 is a schematic structural diagram of a synchronization signal block
  • FIG. 2 is a schematic diagram of a time-frequency resource of common search space in the prior art
  • FIG. 3 is a schematic diagram of a communications system that is applicable to an information transmission method and apparatus in this application;
  • FIG. 4 is a schematic flowchart of an information transmission method according to an embodiment of this application.
  • FIG. 5 is a schematic diagram of a REG according to an embodiment of this application.
  • FIG. 6 is a schematic diagram of a REG according to another embodiment of this application.
  • FIG. 7 is a schematic diagram of a REG set according to an embodiment of this application.
  • FIG. 8 is a schematic diagram of a REG set according to another embodiment of this application.
  • FIG. 9 is a schematic diagram of a REG set according to another embodiment of this application.
  • FIG. 10 is a schematic diagram of a control channel resource set according to an embodiment of this application.
  • FIG. 11 is a schematic diagram of frequency domain center location offset of control channel resource sets of different cells according to an embodiment of this application.
  • FIG. 12 is a schematic diagram of frequency domain offset of control channel resource sets of different cells according to another embodiment of this application.
  • FIG. 13 is a schematic flowchart of an information transmission method according to another embodiment of this application.
  • FIG. 14 is a schematic block diagram of a terminal device according to an embodiment of this application.
  • FIG. 15 is a schematic block diagram of a terminal device according to another embodiment of this application.
  • FIG. 16 is a schematic block diagram of a network device according to an embodiment of this application.
  • FIG. 17 is a schematic block diagram of a network device according to another embodiment of this application.
  • a component may be, but is not limited to, a process that runs on a processor, a processor, an object, an executable tile, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or a thread of execution, and a component may be located on one computer and/or distributed between two or more computers.
  • the components may be executed from various computer-readable media that store various data structures.
  • the components may communicate by using a local and/or remote process and based on a signal having one or more data packets (for example, data from two components interacting with another component in a local system, a distributed system, and/or across a network such as the Internet interacting with other systems by using the signal).
  • a signal having one or more data packets (for example, data from two components interacting with another component in a local system, a distributed system, and/or across a network such as the Internet interacting with other systems by using the signal).
  • an LTE/LTE-A system an LTE/LTE-A frequency division duplex (frequency division duplex, FDD) system, an LTE/LTE-A time division duplex (time division duplex, TDD) system, a universal mobile telecommunication system (universal mobile telecommunication system, UMTS), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, WiMAX) communications system, a public land mobile network (public land mobile network, PLMN) system, a device-to-device (device to device, D2D) network system or a machine-to-machine (machine to machine, M2M) network system, a wireless fidelity (wireless fidelity, Wi-Fi) system, a wireless local area network (wireless local area network, WLAN), and a future 5G communications system.
  • LTE/LTE-A frequency division duplex frequency division duplex, FDD
  • LTE/LTE-A time division duplex time division duplex
  • UMTS universal mobile telecommunication system
  • a terminal device may also be referred to as user equipment (user equipment, UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal), or the like.
  • the terminal device may communicate with one or more core networks over a radio access network (radio access network, RAN).
  • radio access network radio access network
  • the terminal device may include various handheld devices, vehicle-mounted devices, wearable devices, and computing devices that have a wireless communication function, or another processing device connected to a wireless modem.
  • the terminal device may also include a subscriber unit, a cellular phone (cellular phone), a smartphone (smart phone), a wireless data card, a personal digital assistant (Personal Digital Assistant, PDA) computer, a tablet computer, a wireless modem (modem), a handset (handset), a laptop computer (laptop computer), a machine type communication (machine type communication, MTC) terminal, a station (station, STA) in a wireless local area network (wireless local area network, WLAN), and the like.
  • a cellular phone cellular phone
  • smartphone smart phone
  • PDA Personal Digital Assistant
  • modem wireless modem
  • handset handset
  • laptop computer laptop computer
  • MTC machine type communication
  • station station
  • STA wireless local area network
  • WLAN wireless local area network
  • the terminal device may be a cellular phone, a cordless telephone set, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, and a next-generation communications system, for example, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN).
  • SIP Session Initiation Protocol
  • WLL wireless local loop
  • PLMN Public Land Mobile Network
  • a base station may also be referred to as a network-side device or an access network device.
  • the network-side device may be a device that is configured to communicate with the terminal device.
  • the network device may be an evolved NodeB (evolved Node B, eNB or eNodeB) in the LTE system, a gNB in an NR, an access point, a base station transceiver, a transmission reception point, and the like, or may be a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network-side device in a future evolved PLMN system.
  • eNB evolved Node B
  • the network-side device may be an access point (access point, AP) in a WLAN, or may be a base transceiver station (Base Transceiver Station, BTS) in a global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access, CDMA).
  • the network device may be an evolved NodeB (evolved NodeB, eNB or eNodeB) in the LTE system.
  • the network device may be a NodeB (Node B) in the 3rd generation (3rd Generation, 3G) system.
  • the network device may be a relay node, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, a network device in a future evolved PLMN network, or the like. This is not limited in the embodiments of this application.
  • the foregoing apparatuses that provide a wireless communication function for an MS are collectively referred to as a network device.
  • a symbol includes but is not limited to an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol, a sparse code multiple access (sparse code multiple access, SCMA) symbol, a filtered orthogonal frequency division multiplexing (filtered orthogonal frequency division multiplexing, F-OFDM) symbol, a non-orthogonal multiple access (non-orthogonal multiple access, NOMA) symbol, and the like. This is not limited in the embodiments of this application.
  • OFDM orthogonal frequency division multiplexing
  • SCMA sparse code multiple access
  • F-OFDM filtered orthogonal frequency division multiplexing
  • NOMA non-orthogonal multiple access
  • a subframe is a time-frequency resource element that includes a time-frequency resource that occupies an entire system bandwidth in frequency domain and fixed duration in time domain, for example, 1 ms.
  • a slot refers to a basic time-frequency resource element that occupies seven consecutive symbols in time domain. This is not limited in the embodiments of this application.
  • a subcarrier width is a minimum granularity in frequency domain.
  • a subcarrier width of one subcarrier is 15 kHz; and in the 5G system, one subcarrier width may be 15 kHz, 30 kHz, 60 kHz, or the like. This is not limited in the embodiments of this application.
  • a physical resource block occupies P consecutive subcarriers in frequency domain and Q consecutive OFDM symbols in time domain, where P and Q are natural numbers greater than 1.
  • a resource element group occupies P consecutive subcarriers in frequency domain and Q consecutive OFDM symbols in time domain, where P is a natural number greater than 1.
  • control channel element corresponds to a plurality of resource element groups.
  • One control channel element corresponds to a fixed quantity of resource element groups, for example, six resource element groups. This is not limited in the embodiments of this application.
  • FIG. 1 is a structural schematic diagram of a synchronization signal block. It can be learned from FIG. 1 that the synchronization signal block includes a synchronization signal and a broadcast channel.
  • the synchronization signal includes a primary synchronization signal (primary synchronization signal, PSS) and a secondary synchronization signal (secondary synchronization signal, SSS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the synchronization signal is sent in a format of a synchronization signal sequence, and different synchronization signal sequences correspond to different cell identities.
  • the broadcast channel occupies 24 PRBs, the primary synchronization signal and the secondary synchronization signal occupy 12 PRBs, and the synchronization signal block occupies four symbol lengths in time domain.
  • the terminal device receives broadcast information that is carried on the broadcast channel, to obtain a time-frequency resource of a control channel.
  • the time-frequency resource of the control channel includes at least common search space.
  • the common search space is a time-frequency resource on which the terminal device receives broadcast signaling in a serving cell.
  • the broadcast signaling includes at least one type of control information for scheduling paging information and control information for indicating random access response information.
  • the broadcast information carries system bandwidth information, and the system bandwidth information is used to indicate a frequency domain resource of a control channel resource set.
  • the broadcast information includes 3-bit information, and corresponds to ⁇ 6, 15, 25, 50, 75, 100 ⁇ physical resource blocks in a system bandwidth, or corresponds to ⁇ 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz ⁇ bandwidth values.
  • FIG. 2 is a schematic diagram of a time-frequency resource of common search space in the prior art.
  • a horizontal axis is a frequency domain
  • common search space (common search space, CSS) of each cell includes a plurality of CCEs, for example, eight CCEs.
  • Each CCE includes six PRBs in frequency domain, and the control channel occupies one OFDM symbol in time domain.
  • 2, 1, 0, ⁇ 1, and ⁇ 2 are offsets that from a center frequency of the broadcast information to frequency domain resources of control channels of different cells, where a positive value and a negative value represent offsets in opposite directions. It can be learned from FIG. 2 that, for one cell, a frequency domain resource occupied by a control channel is consecutive, to be specific, there is no interval between eight CCEs. In addition, as shown in FIG. 2 , control channels of five different cells overlap partially in frequency domain. Therefore, control information is easily interfered by a neighboring cell. The control channel is consecutive in frequency domain. If a relatively large quantity of signal paths are generated in a channel environment, transmitted control information does not easily obtain a frequency diversity gain. Moreover, in the 5G system, the broadcast information no longer includes the system bandwidth information. Therefore, a user cannot acquire the time-frequency resource of the control channel. In this way, the user cannot obtain inbound bandwidth information.
  • the embodiments of this application provide an information transmission method, and configuration information of a synchronization signal block may be used to notify the terminal device of a time-frequency resource of a control channel.
  • frequency diversity gains are obtained as many as possible when relatively low interference to a neighboring cell is ensured.
  • FIG. 3 is a schematic diagram of a communications system that is applicable to an information transmission method and apparatus in this application.
  • the communications system 100 includes a network device 102 .
  • the network device 102 may include a plurality of antennas, for example, antennas 104 , 106 , 108 , 110 , 112 , and 114 .
  • the network device 102 may additionally include a transmitter chain and a receiver chain.
  • the transmitter chain and the receiver chain may include a plurality of components (for example, a processor, a modulator, a multiplexer, an encoder, a demultiplexer, or an antenna) related to signal sending and receiving.
  • the network device 102 may communicate with a plurality of terminal devices (for example, a terminal device 116 and a terminal device 122 ). However, it may be understood that the network device 102 may communicate with any quantity of terminal devices that are similar to the terminal device 116 or the terminal device 122 .
  • the terminal devices 116 and 122 may be, for example, a cellular phone, a smartphone, a portable computer, a handheld communications device, a handheld computing device, a satellite radio apparatus, a global positioning system, a PDA, and/or any another suitable device configured to perform communication in the wireless communications system 100 .
  • the terminal device 116 communicates with the antennas 112 and 114 .
  • the antennas 112 and 114 send information to the terminal device 116 over a forward link 118 , and receive information from the terminal device 116 over a reverse link 120 .
  • the terminal device 122 communicates with the antennas 104 and 106 .
  • the antennas 104 and 106 send information to the terminal device 122 over a forward link 124 , and receive information from the terminal device 122 over a reverse link 126 .
  • the forward link 118 and the reverse link 120 may use different frequency bands, and the forward link 124 and the reverse link 126 may use different frequency bands.
  • the forward link 118 and the reverse link 120 may use a same frequency band, and the forward link 124 and the reverse link 126 may use a same frequency band.
  • Each antenna (or an antenna group including a plurality of antennas) and/or area that are/is designed for communication is referred to as a sector of the network device 102 .
  • the antenna group may be designed to communicate with a terminal device in a sector within a coverage area of the network device 102 .
  • transmit antennas of the network device 102 may increase signal-to-noise ratios of the forward links 118 and 124 through beamforming.
  • the network device 102 sends, through beamforming, signals to the terminal devices 116 and 122 that are randomly distributed in a related coverage area, interference to a mobile device in a neighboring cell is less than that caused when a network device sends, through a single antenna, signals to all terminal devices that belong to the network device.
  • the network device 102 , the terminal device 116 , or the terminal device 122 may be a wireless communications sending apparatus and/or a wireless communications receiving apparatus.
  • the wireless communications sending apparatus may encode data for transmission.
  • the wireless communications sending apparatus may obtain (for example, generate, receive from another communications apparatus, or store in a memory) a specific quantity of data bits that need to be sent to the wireless communications receiving apparatus through a channel.
  • the data bits may be included in a transport block (or a plurality of transport blocks) of data, and the transport block may be segmented to generate a plurality of code blocks.
  • the communications system 100 may be a PLMN network, a D2D network, an M2M network, or another network.
  • FIG. 3 is merely a simplified schematic diagram of an example.
  • the network may further include another network device that is not shown in FIG. 3 .
  • FIG. 4 is a schematic flowchart of an information transmission method 200 according to an embodiment of this application.
  • the method 200 may be applied to the scenario shown in FIG. 3 , and certainly may also be applied to another communications scenario. This is not limited in the embodiments of this application.
  • the method 200 includes the following steps.
  • a terminal device receives configuration information of a control channel resource set, where the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks.
  • the terminal device determines a time-frequency resource of the control channel based on the configuration information.
  • the terminal device receives control information on the time-frequency resource of the control channel.
  • the terminal device when the terminal device initially accesses a system, the terminal device first determines the time-frequency resource of the control channel. After determining the time-frequency resource of the control channel, the terminal device receives the control information on the time-frequency resource of the control channel.
  • the control channel is mainly used to transmit the control information or synchronous data, and mainly includes one or more of common search space CSS and terminal-device-specific search space.
  • the common search space is a time-frequency resource on which the terminal device receives broadcast control information or terminal-device-specific control information in a serving cell, and the broadcast control information includes at least one type of control information for scheduling paging information and control information for indicating random access response information.
  • the synchronization signal block includes broadcast information and a synchronization signal
  • the broadcast information includes the configuration information of the control channel resource set
  • the synchronization signal carries a cell identity.
  • the terminal device receives the configuration information that is sent by a network device and that is of the control channel resource set.
  • the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of the quantity of time-frequency resource blocks of the control channel and the interval between two adjacent time-frequency resource blocks.
  • the interval between two adjacent time-frequency resource blocks may be predefined by the system, or when the configuration information includes the interval between two adjacent time-frequency resource blocks of the control channel, the quantity of time-frequency resource blocks of the control channel may be predefined by the system.
  • the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks.
  • the plurality of time-frequency resource blocks may have a specific interval in frequency domain or a specific interval in time domain.
  • the terminal device determines the time-frequency resource of the control channel based on the configuration information. To be specific, the terminal device determines the time-frequency resource of the control channel based on the quantity of time-frequency resource blocks and information of the interval between two adjacent time-frequency resource blocks.
  • the terminal device receives the control information on the time-frequency resource of the control channel, and determines, based on the received control information, a to-be-accessed cell and a bandwidth of the cell, to subsequently communicate with the network device.
  • the configuration information of the control channel resource set not only includes the quantity of time-frequency resource blocks of the control channel and the interval between two adjacent time-frequency resource blocks, but also includes other information or content that is related to the control channel resource set. This is not limited in this embodiment of this application.
  • configuration information of the control channel resource set may further include other information of the control channel resource set, for example, information about a frequency domain range of the control channel. This is not limited in this embodiment of this application.
  • time-frequency resource block may be a time-frequency resource block that has any granularity and that is specified in a protocol, for example, a PRB is used as a unit. This is not limited in this embodiment of this application.
  • the configuration information of the control channel resource set is used to indicate the time-frequency resource of the control channel.
  • the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks. Therefore, even if a relatively large quantity of signal paths are generated in a channel environment, the terminal device may obtain a better frequency diversity gain when receiving the control information on the control channel, to improve transmission efficiency.
  • the time-frequency resource block includes at least one resource element group REG set, and the REG set includes a plurality of REGs that are consecutive or adjacent in time domain or in frequency domain,
  • a plurality of REGs that are consecutive in time domain or in frequency domain may constitute one REG set, or a plurality of REGs that are consecutive in time domain or in frequency domain may he bundled (bundling) together to constitute one REG bundle (bundle).
  • the REG set may be referred to as the REG bundle (bundle), or may be referred to as the REG group (group).
  • a specific name of the REG set is not limited in this application. Because a physical downlink control channel (physical downlink control channel, PDCCH) is mapped to a REG by using a CCE, a plurality of REGs corresponding to each CCE are bundled together to constitute one or more REG sets.
  • PDCCH physical downlink control channel
  • FIG. 5 and FIG. 6 are schematic diagrams of a REG according to an embodiment of this application.
  • the REG includes 12 REs. Two REs are used for a DMRS, and 10 REs are used for downlink control information (downlink control information, DCI).
  • DCI downlink control information
  • FIG. 6 four REs are used for a DMRS, and six REs are used for DCI.
  • This time-frequency resource block includes at least one REG set, and each REG set includes a plurality of REGs that is consecutive or adjacent in time domain or in frequency domain.
  • REGs that are consecutive in frequency domain mean that REG numbers are consecutive in frequency domain.
  • there is no subcarrier spacing between two adjacent REGs subcarriers of the two adjacent REGs are consecutive, and there is no idle frequency domain part between the two adjacent REGs.
  • REGs that are consecutive in time domain mean that REG numbers are consecutive in time domain.
  • REGs that are adjacent in frequency domain mean that REG numbers are inconsecutive in frequency domain.
  • the subcarrier spacing may be used to communicate with another terminal device or transmit other signaling, and subcarriers of the two adjacent REGs are inconsecutive.
  • REGs that are adjacent in time domain mean that REG numbers are inconsecutive in time domain.
  • OFDM symbol spacing between two adjacent REGs, and OFDM symbols of the two adjacent REGs are inconsecutive.
  • FIG. 7 is a schematic diagram of a REG set according to an embodiment of this application.
  • the REG set may have four different formats.
  • a REG set in a format 1 includes one REG
  • a REG set in a format 2 includes two REGs that are consecutive in frequency domain
  • a REG set in a format 3 includes three REGs that are consecutive in frequency domain
  • a REG set in a format 4 includes six REGs that are consecutive in frequency domain.
  • FIG. 8 is a schematic diagram of a REG set according to another embodiment of this application.
  • the REG set may have two different formats.
  • a REG set in a format 5 includes two REGs that are consecutive in time domain.
  • a REG set in a format 6 includes six REGs in which three REGs numbered 0, 1, and 2 are consecutive in frequency domain, three REGs numbered 7, 8, and 9 are consecutive in frequency domain, the REGs numbered 0 and 7 are consecutive in time domain, the REGs numbered 1 and 8 are consecutive in time domain, and the REGs numbered 2 and 9 are consecutive in time domain.
  • FIG. 9 is a schematic diagram of a REG set according to another embodiment of this application.
  • the REG set may have two different formats.
  • a REG set in a format 7 includes three REGs that are consecutive in time domain.
  • a REG set in a format 8 includes six REGs in which three REGs numbered 10, 11, and 12 are consecutive in time domain, three REGs numbered 13, 14, and 15 are consecutive in time domain, and the REGs numbered 10 and 13 are consecutive in frequency domain.
  • a quantity of REGs that are consecutive or adjacent in frequency domain or in time domain may be obtained based on the format of the REG set.
  • a bundling size of the REG or a bundling format of the REG may be predefined based on the control resource set or the search space, and therefore, are commonly known to both the terminal device and the network device.
  • the network device may notify the terminal device of a bundling size of the REG or a bundling format of the REG through signaling, for example, through higher layer signaling, such as radio resource control (radio resource control, RRC) signaling.
  • RRC radio resource control
  • any one of the at least one REG set meets at least one of the following conditions: in PRBs that are consecutive or adjacent in frequency domain, where in is a positive integer; or n symbols that are consecutive or adjacent in time domain, where n is a positive integer.
  • n may be 1, 2, 3, or the like.
  • adjacency in frequency domain means that a plurality of RBs that are configured in the control resource set may be inconsecutive in frequency domain, but after the RBs are sorted in ascending order or in descending order in frequency domain, indexes of the RBs may be consecutive.
  • Adjacency in time domain means that a plurality of RBs that are configured in the control resource set may be inconsecutive in time domain, but after the RBs are sorted in ascending order or in descending order in time domain, indexes of the RBs may be consecutive.
  • the time-frequency resource block includes at least one REG set.
  • the control channel includes a plurality of REG sets in frequency domain, there is an interval between two adjacent REG sets in the plurality of REG sets, and the interval includes at least one non-zero value.
  • the control channel is inconsecutive in frequency domain, and there is an interval between the plurality of REG sets that constitute the time-frequency resource of the control channel.
  • a value of the interval may be predefined, or may be configured as different values based on different circumstances.
  • the value of the interval includes at least one non-zero value. If the value of the interval is zero, it is equivalent to that the time-frequency resource of the control channel is consecutive in frequency domain.
  • the interval may have a plurality of values, and the plurality of values of the interval may be the same or different.
  • FIG. 10 is a schematic diagram of a control channel resource set according to an embodiment of this application.
  • the control channel resource set includes only one OFDM symbol in time domain, and occupies 48 REGs in an entire frequency domain, to be specific, REGs numbered from 0 to 47.
  • the control channel is inconsecutive in frequency domain.
  • the control channel includes four REG sets in total in frequency domain, and there is an interval between two adjacent REG sets, to be specific, there are four intervals. Each interval includes six REGs.
  • Each REG set also includes six REGs that are consecutive in frequency domain, to be specific, the terminal device receives control information within the four REG sets in frequency domain.
  • control channel in frequency domain is merely a specific example of this embodiment of this application, and should not be constructed as any limitation on this embodiment of this application.
  • the control channel may occupy another quantity of REGs in an entire frequency domain
  • the control channel may include another quantity of REG sets in frequency domain, and a plurality of intervals may be different.
  • the interval may be greater than, equal to, or less than the REG set in frequency domain. This is not limited in this embodiment of this application.
  • a unit of a frequency domain resource occupied by the control channel in frequency domain is a REG set or a REG
  • the unit of the frequency domain resource occupied by the control channel in frequency domain may be alternatively a PRB, a PRB set, a CCE, or the like. This is not limited in this embodiment of this application.
  • the REG set includes N REGs, where a value of N is any one of 1, 2, 3, and a positive integer multiple of 2 or 3.
  • the REG set includes REGs, and the REG includes one OFDM symbol in time domain and 12 subcarriers that are consecutive in frequency domain.
  • the REG set may include N REGs, where a value of N is any one of 1, 2, 3, and a positive integer multiple of 2 or 3.
  • the REG set may include two REGs, three REGs, six REGs, or the like, provided that a quantity of REGs that constitute the REG set is 1, 2, 3, or a positive integer multiple of 2 or 3.
  • the REG set may include another quantity of REGs. This is not limited in this embodiment of this application.
  • the interval between adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REGs or a frequency domain resource corresponding to an integer quantity of REG sets.
  • a granularity of the frequency domain interval between adjacent time-frequency resource blocks may be a REG, to be specific, the frequency domain interval may include a frequency domain resource corresponding to an integer quantity of REGs.
  • the frequency domain interval includes a frequency domain resource corresponding to five REGs. Because the frequency domain interval includes a plurality of different values, the frequency domain interval may correspond to different frequency domain resources.
  • the frequency domain interval may be greater than, equal to, or less than one REG set in frequency domain.
  • the granularity of the frequency domain interval may be alternatively a frequency domain size occupied by a PRB or another frequency domain unit. This is not limited in this embodiment of this application.
  • the interval between adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REG sets.
  • a granularity of the frequency domain interval between adjacent time-frequency resource blocks may be a REG set, to be specific, the frequency domain interval may include a frequency domain resource corresponding to an integer quantity of REG sets.
  • the frequency domain interval is a frequency domain resource corresponding to five REG sets.
  • the frequency domain interval is the same as the REG set in frequency domain, as shown in a control channel resource in FIG. 5 .
  • the granularity of the frequency domain interval may be alternatively a PRB set or another frequency domain unit set. This is not limited in this embodiment of this application.
  • the terminal device determines inbound bandwidth information of the terminal device based on the interval between adjacent time-frequency resource blocks and/or at least one REG set.
  • the information about a bandwidth through which the terminal device accesses the system may be determined by using a frequency domain resource of the control channel. Because the control channel has an interval in frequency domain, the information may be determined by using the interval and the at least one time-frequency resource blocks.
  • the schematic diagram of the control channel in frequency domain is used as an example for descriptions.
  • the interval between two adjacent time-frequency resource blocks is six REGs, in other words, the interval is a frequency domain corresponding to the six REGs.
  • the terminal device determines, based on the interval, the information about a bandwidth through which the terminal device accesses the system. For example, the terminal device determines, based on predefinition, that K times a frequency domain resource corresponding to the interval is the bandwidth through which the terminal device accesses the system. For another example, the terminal device may determine, according to an equation that is related to a frequency domain resource corresponding to the interval, the information about the bandwidth through which the terminal device accesses the system. This is not limited in this embodiment of this application.
  • the terminal device may determine, based on predefinition, that K times a frequency domain resource corresponding to the at least one time-frequency resource block is the bandwidth through which the terminal device accesses the system. For another example, the terminal device may determine, according to an equation that is related to a frequency domain resource corresponding to the at least one time-frequency resource block, the information about the bandwidth through which the terminal device accesses the system. This is not limited in this embodiment of this application.
  • an offset that is from a frequency domain center location of a synchronization signal block to a frequency domain center location of the resource set is predefined, or is indicated by the configuration information; and the synchronization signal block includes the configuration information.
  • control channels of different cells may overlap partially in frequency domain, to be specific, the control channels of the different cells may have an overlapping part in frequency domain. Therefore, the different cells are easily interfered by neighboring cells when receiving control information on respective control channels.
  • a frequency domain center location of a control channel of each cell has offset relative to the frequency domain center location of the broadcast information, and different cells have different offsets.
  • the frequency domain center location of the resource set has offset relative to the frequency domain center location of the synchronization signal block, and an offset corresponds to a cell identity.
  • the synchronization signal block includes broadcast information and a synchronization signal, the broadcast information includes the configuration information of the control channel resource set, and the synchronization signal carries a cell identity.
  • the terminal device determines the offset based on the cell identity in the synchronization signal, to determine the time-frequency resource of the control channel.
  • the cell identity is carried on the synchronization signal block sent by the network device.
  • the offset that is from the frequency domain center location of the synchronization signal block to the frequency domain center location of the resource set is determined based on the cell identity in the synchronization signal block.
  • control channels of different cells do not overlap or have a smaller overlapping part in frequency domain, to reduce interference suffered by the different cells from neighboring cells when control information is received on the respective control channels in the different cells.
  • the offset may be predefined by the system, to be specific, specified in a protocol; or may be indicated by the configuration information. This is not limited in this embodiment of this application.
  • a quantity of offsets that is between the frequency domain center location of the control channel resource set and the frequency domain center location of the synchronization signal block may be determined based on the time-frequency resource block and the interval between two adjacent time-frequency resource blocks.
  • the inbound bandwidth of the terminal device is determined based on the time-frequency resource block and the interval between two adjacent time-frequency resource blocks, and a quantity of frequency offsets of the control channel resource set may be derived based on the inbound bandwidth.
  • a bandwidth occupied by a control channel resource set of a cell 1 is 20 MHz, and corresponds to four pieces of time domain offset.
  • a bandwidth occupied by a control channel resource set of a cell 2 is 10 MHz, and corresponds to two pieces of time domain offset.
  • FIG. 11 is a schematic diagram of frequency domain offset of control channel resource sets of different cells according to an embodiment of this application.
  • the bandwidth occupied by the control channel resource set of the cell 1 is 20 MHz
  • the bandwidth occupied by the control channel resource set of the cell 2 is 10 MHz.
  • the control channel resource set of the cell 1 and the control channel resource set of the cell 2 are inconsecutive in frequency domain.
  • a frequency domain center of the control channel resource set of the cell 1 and a frequency domain center of the control channel resource set of the cell 2 have different offsets relative to a frequency domain center location of the synchronization signal block.
  • Offset that is of the frequency domain center of the control channel resource set of the cell 1 and that is relative to the frequency domain center location of the synchronization signal block is one REG set to the left in frequency domain.
  • Offset that is of the frequency domain center of the control channel resource set of the cell 2 and that is relative to the frequency domain center location of the synchronization signal block is one REG set to the right in frequency domain.
  • FIG. 12 is a schematic diagram of frequency domain offset of control channel resource sets of different cells according to another embodiment of this application.
  • a control channel resource set of a cell 1 is also inconsecutive in frequency domain and has an interval. Therefore, a cell 2 may be configured to receive control information on a frequency domain interval part of the control channel resource set of the cell 1 , to be specific, the frequency domain interval part of the control channel resource set of the cell 1 is a frequency domain part of a control channel resource set of the cell 2 .
  • the control channel resource set of the cell 1 and the control channel resource set of the cell 2 do not overlap in frequency domain, to reduce interference suffered by different cells front neighboring cells when control information is received on respective control channel resource sets in the different cells.
  • FIG. 11 and FIG. 12 show an example in which the control channel resource sets of the two cells do not overlap in frequency domain, to illustrate that control channels of different cells do not overlap in frequency domain.
  • this embodiment of this application is not limited thereto.
  • control channels of more cells may not overlap in frequency domain, to be specific, different offsets exist relative to the frequency domain center location of the broadcast information. This is not limited in this embodiment of this application.
  • a control channel of a cell is inconsecutive in an entire frequency domain and has a frequency domain interval.
  • the terminal device receives control information from the control channel of this format, and may also obtain a better frequency diversity gain, to improve transmission efficiency.
  • frequency domain center locations of control channels of different cells have different offsets relative to the frequency domain center location of the control channel resource set, to be specific, the control channels of the different cells do not overlap in frequency domain, to reduce interference suffered by the different cells from neighboring cells when control information is received on the respective control channels in the different cells.
  • the configuration information of the control channel resource set is used to indicate the time-frequency resource of the control channel, to be specific, determine the frequency domain resource of the control channel, to resolve a problem that the time-frequency resource of the control channel cannot be indicated in 5G.
  • At least one of the quantity of time-frequency resource blocks and the interval between two adjacent time-frequency resource blocks is predefined.
  • the quantity of time-frequency resource blocks included in the control channel may be predefined in a protocol.
  • the terminal device may not be notified of the quantity through signaling. Therefore, signaling overheads can be reduced.
  • the quantity of time-frequency resource blocks included in the control channel may be configured by the network device.
  • different quantities of time-frequency resource blocks may be configured, and the configuration information is used to indicate a specific quantity of time-frequency resource blocks to the terminal device. This can provide flexibility of resource configuration, and improve spectrum utilization.
  • the interval between two adjacent time-frequency resource blocks may be predefined in a protocol, or may be configured by the network device and indicated to the terminal device by using the configuration information. This is not limited in this embodiment of this application.
  • At least one of a quantity of REG sets included in the time-frequency resource block and a quantity of REGs included in the REG set is predefined, or is indicated by the configuration information.
  • the quantity of REG sets included in the time-frequency resource block may be predefined in a protocol, or may be configured by the network device and indicated to the terminal device by using the configuration information.
  • the quantity of REGs included in the REG set may also be predefined in a protocol, or may be configured by the network device and indicated to the terminal device by using the configuration information. This is not limited in this embodiment of this application.
  • FIG. 13 is a schematic flowchart of an information transmission method 300 according to an embodiment of this application. As shown in FIG. 13 , the method 300 includes the following steps.
  • the network device generates configuration information of a control channel resource set, where the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks.
  • the network device sends the configuration information.
  • the network device when the terminal device initially accesses a system, the network device notifies a terminal device of the time-frequency resource of the control channel, and the terminal device receives the control information on the time-frequency resource.
  • the control channel is mainly used to transmit signaling or synchronous data. In a 5G system, broadcast information no longer includes system bandwidth information. Therefore, in S 310 , the network device generates the configuration information of the control channel resource set, and the configuration information is used to indicate the control channel resource set.
  • the control channel includes common search space CSS, a broadcast channel, and a dedicated control channel.
  • the configuration information includes at least one of the quantity of time-frequency resource blocks of the control channel and the interval between two adjacent time-frequency resource blocks.
  • the interval between two adjacent time-frequency resource blocks may be predefined by the system.
  • the configuration information includes the interval between two adjacent time-frequency resource blocks of the control channel
  • the quantity of time-frequency resource blocks of the control channel may be predefined by the system.
  • the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks.
  • the plurality of time-frequency resource blocks may have a specific interval in frequency domain or a specific interval in time domain.
  • the terminal device After determining the time-frequency resource of the control channel, the terminal device receives the control information on the time-frequency resource of the control channel, and determines, based on the received control information, a to-be-accessed cell and a bandwidth of the cell, to subsequently communicate with the network device.
  • the network device uses the configuration information of the control channel resource set to indicate the time-frequency resource of the control channel, the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks. Therefore, even if a relatively large quantity of signal paths are generated in a channel environment, the terminal device may obtain a better frequency diversity gain when receiving the control information on the control channel, to improve transmission efficiency.
  • the time-frequency resource block includes at least one resource element group REG set, and the REG set includes a plurality of REGs that are consecutive or adjacent in time domain or in frequency domain.
  • the time-frequency resource block includes at least one REG set, and each REG set includes a plurality of REGs that is consecutive or adjacent in time domain or in frequency domain.
  • REGs that are consecutive in frequency domain mean that REG numbers are consecutive in frequency domain.
  • there is no subcarrier spacing between two adjacent REGs subcarriers of the two adjacent REGs are consecutive, and there is no idle frequency domain part between the two adjacent REGs.
  • REGs that are consecutive in time domain mean that REG numbers are consecutive in time domain.
  • there is no OFDM symbol spacing between two adjacent REGs OFDM symbols of the two adjacent REGs are consecutive, and there is no idle time domain part between the two adjacent REGs.
  • REGs that are adjacent in frequency domain mean that REG numbers are inconsecutive in frequency domain.
  • the subcarrier spacing may be used to communicate with another terminal device or transmit other signaling, and subcarriers of the two adjacent REGs are inconsecutive.
  • REGs that are adjacent in time domain mean that REG numbers are inconsecutive in time domain.
  • the time-frequency resource block includes at least one resource element group REG set.
  • the control channel includes a plurality of REG sets in frequency domain, there is an interval between two adjacent REG sets in the plurality of REG sets, and the interval includes at least one non-zero value.
  • the control channel is inconsecutive in frequency domain, and there is an interval between the plurality of REG sets that constitute the time-frequency resource of the control channel.
  • a value of the interval may be set according to a system protocol, or may be configured as different values based on different circumstances.
  • the value of the interval includes at least one non-zero value. If the value of the interval is zero, it is equivalent to that the time-frequency resource of the control channel is consecutive in frequency domain.
  • the interval may have a plurality of values, and the plurality of values of the interval may be the same or different.
  • time-frequency resource block may alternatively include at least one PRB set, and the PRB set includes a plurality of PRBs that are consecutive or adjacent in time domain or in frequency domain. This is not limited in this embodiment of this application.
  • the REG set includes N REGs, where a value of N is any one of 1, 2, 3, and a positive integer multiple of 2 or 3.
  • the REG set includes REGs, and the REG includes one OFDM symbol in time domain and 12 subcarriers that are consecutive in frequency domain.
  • the REG set may include N REGs, where a value of N is any one of 1, 2, 3, and a positive integer multiple of 2 or 3.
  • the REG set may include two REGs, three REGs, six REGs, or the like, provided that a quantity of REGs that constitute the REG set is 1, 2, 3, or a positive integer multiple of 2 or 3.
  • the interval between adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REGs or a frequency domain resource corresponding to an integer quantity of REG sets.
  • the interval between adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REGs or a frequency domain resource corresponding to an integer quantity of REG sets.
  • a granularity of the interval between adjacent time-frequency resource blocks may be a REG, to be specific, a frequency domain interval may include an integer quantity of REGs.
  • the frequency domain interval is a frequency domain resource corresponding to five REGs. Because the frequency domain interval includes a plurality of different values, the frequency domain interval may correspond to different frequency domain resources. The interval may be greater than, equal to, or less than one REG set in frequency domain.
  • the granularity of the frequency domain interval may be alternatively a PRB or another frequency domain unit. This is not limited in this embodiment of this application.
  • the interval between adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REG sets.
  • a granularity of the frequency domain interval between adjacent time-frequency resource blocks may be a REG set, to be specific, the frequency domain interval may include a frequency domain resource corresponding to an integer quantity of REG sets.
  • the frequency domain interval is a frequency domain resource corresponding to five REG sets.
  • the frequency domain interval is the same as the REG set in frequency domain, as shown in a control channel frequency domain resource in FIG. 5 .
  • the granularity of the frequency domain interval may be alternatively a PRB set or another frequency domain unit set. This is not limited in this embodiment of this application.
  • an offset that is between a frequency domain center location of the resource set and a frequency domain center location of a synchronization signal block is predefined, or is indicated by the configuration information; and the synchronization signal block includes the configuration information.
  • control channels of different cells may overlap partially in frequency domain, to be specific, the control channels of the different cells may have an overlapping part in frequency domain. Therefore, the different cells are easily interfered by neighboring cells when receiving control information on respective control channels.
  • a frequency domain center location of a control channel of each cell has offset relative to the frequency domain center location of the broadcast information, and different cells have different offsets.
  • the frequency domain center location of the resource set has offset relative to the frequency domain center location of the synchronization signal block, and an offset corresponds to a cell identity.
  • the synchronization signal block includes broadcast information and a synchronization signal, the broadcast information includes the configuration information of the control channel resource set, and the synchronization signal carries a cell identity.
  • the terminal device determines the offset based on the cell identity in the synchronization signal block.
  • the offset that is from the frequency domain center location of the synchronization signal block to the frequency domain center location of the resource set is determined based on the cell identity in the synchronization signal block.
  • control channels of different cells do not overlap or have a smaller overlapping part in frequency domain, to reduce interference suffered by the different cells from neighboring cells when control information is received on the respective control channels in the different cells.
  • the offset may be predefined by the system, to be specific, specified in a protocol; or may be indicated by the configuration information. This is not limited in this embodiment of this application.
  • At least one of the quantity of time-frequency resource blocks and the interval between two adjacent time-frequency resource blocks is predefined.
  • the quantity of time-frequency resource blocks included in the control channel may be predefined in a protocol.
  • the terminal device may not be notified of the quantity through signaling. Therefore, signaling overheads can be reduced.
  • the quantity of time-frequency resource blocks included in the control channel may be configured by the network device.
  • different quantities of time-frequency resource blocks may be configured, and the configuration information is used to indicate a specific quantity of time-frequency resource blocks to the terminal device. This can provide flexibility of resource configuration, and improve spectrum utilization.
  • the interval between two adjacent time-frequency resource blocks may be predefined in a protocol, or may be configured by the network device and indicated to the terminal device by using the configuration information. This is not limited in this embodiment of this application.
  • At least one of a quantity of REG sets included in the time-frequency resource block and a quantity of REGs included in the REG set is predefined, or is indicated by the configuration information.
  • sequence numbers of the foregoing processes do not mean execution sequences in the embodiments of this application.
  • the execution sequences of the processes should be determined based on functions and internal logic of the processes, and should not be constructed as any limitation on the implementation processes of the embodiments of this application.
  • the quantity of REG sets included in the time-frequency resource block may be predefined in a protocol, or may be configured by the network device and indicated to the terminal device by using the configuration information.
  • the quantity of REGs included in the REG set may also be predefined in a protocol, or may be configured by the network device and indicated to the terminal device by using the configuration information. This is not limited in this embodiment of this application.
  • a control channel of a cell is inconsecutive in an entire frequency domain and has a frequency domain interval.
  • the network device sends control information on the control channel of this format, and may also obtain a better frequency diversity gain, to improve transmission efficiency.
  • frequency domain center locations of control channels of different cells have different offsets relative to the frequency domain center location of the control channel resource set, to be specific, the control channels of the different cells do not overlap in frequency domain, to reduce interference suffered by the different cells from neighboring cells when control information is received on the respective control channels in the different cells.
  • the configuration information of the control channel resource set is used to indicate the time-frequency resource of the control channel, to be specific, determine the frequency domain resource of the control channel, to resolve a problem that the time-frequency resource of the control channel cannot he indicated in 5G.
  • FIG. 14 is a schematic block diagram of a terminal device according to an embodiment of this application. It should be understood that an embodiment of the terminal device and a method embodiment correspond to each other. For similar descriptions, refer to the method embodiment.
  • a terminal device 400 shown in FIG. 14 may be configured to perform steps corresponding to the terminal device in FIG. 4 .
  • the terminal device 400 includes a processor 410 , a memory 420 , and a transceiver 430 .
  • the processor 410 , the memory 420 , and the transceiver 430 are connected.
  • the memory 420 stores instructions.
  • the processor 410 is configured to execute the instructions stored in the memory 420 .
  • the transceiver 430 driven by the processor 410 , is configured to send or receive a specific signal.
  • the transceiver 430 is configured to receive configuration information of a control channel resource set, where the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks.
  • the processor 410 is configured to determine a time-frequency resource of the control channel based on the configuration information.
  • the transceiver 430 is further configured to receive control information on the time-frequency resource of the control channel.
  • the terminal device provided in this embodiment of this application learns of the time-frequency resource of the control channel based on the configuration information of the control channel resource set.
  • the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks. Therefore, even if a relatively large quantity of signal paths are generated in a channel environment, the terminal device may obtain a better frequency diversity gain when receiving the control information on the control channel, to improve transmission efficiency.
  • the components in the terminal device 400 are connected.
  • the processor 410 , the memory 420 , and the transceiver 430 communicate with each other through an inner connection path, to transmit a control signal and/or a data signal.
  • the foregoing method embodiments in this application may be applied to the processor, or the processor implements the steps in the foregoing method embodiments.
  • the processor may be an integrated circuit chip and has a signal processing capability.
  • the steps in the foregoing method embodiments can be implemented by using a hardware integrated logical circuit in the processor, or by using instructions in a form of software.
  • the processor may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP), a combination of a CPU and an NP, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or another programmable logic device, a discrete gate, a transistor logic device, or a discrete hardware component.
  • the processor may implement or perform the methods, steps, and logical block diagrams that are disclosed in this application.
  • the general-purpose processor may be a microprocessor, or the processor may be any conventional processor or the like.
  • a software module may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register.
  • the storage medium is located in the memory, and the processor reads information in the memory and implements the steps in the foregoing methods in combination with hardware of the processor.
  • the time-frequency resource block includes at least one resource element group REG set, and the REG set includes a plurality of REGs that are consecutive or adjacent in time domain or in frequency domain.
  • the interval between two adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REGs or a frequency domain resource corresponding to an integer quantity of REG sets.
  • offset that is of a frequency domain center location of the resource set and that is relative to a frequency domain center location of a synchronization signal block is predefined, or is indicated by the configuration information; and the synchronization signal block includes the configuration information.
  • At least one of the quantity of time-frequency resource blocks and the interval between two adjacent time-frequency resource blocks is predefined.
  • At least one of a quantity of REG sets included in the time-frequency resource block and a quantity of REGs included in the REG set is predefined, or is indicated by the configuration information.
  • the processor 410 is further configured to determine an offset based on a cell identity in the synchronization signal block.
  • the control channel for receiving the control information is inconsecutive in an entire frequency domain, and has a frequency domain interval.
  • the terminal device receives the control information on the control channel of this format, and may also obtain a better frequency diversity gain, to improve transmission efficiency.
  • Frequency domain center locations of control channels of different cells have different offsets relative to the frequency domain center location of the control channel resource set. Control channels of the terminal device in different cells do not overlap in frequency domain, to reduce interference suffered by the terminal device from a neighboring cell when the terminal device receives control information on the respective control channels in the different cells.
  • a terminal device 500 may include a processing module 510 , a storage module 520 , and a transceiver module 530 .
  • the terminal device 400 shown in FIG. 14 or the terminal device 500 shown in FIG. 15 can implement the steps performed by the terminal device in FIG. 4 . To avoid repetition, details are not described herein again.
  • FIG. 16 is a schematic block diagram of a network device 600 according to an embodiment of this application. It should be understood that an embodiment of the network device and a method embodiment correspond to each other. For similar descriptions, refer to the method embodiment.
  • the network device 600 includes a processor 610 , a memory 620 , and a transceiver 630 .
  • the processor 610 , the memory 620 , and the transceiver 630 are connected.
  • the memory 620 stores instructions.
  • the processor 610 is configured to execute the instructions stored in the memory 620 .
  • the transceiver 630 driven by the processor 610 , is configured to send or receive a specific signal.
  • the transceiver 610 is configured to generate configuration information of a control channel resource set, where the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks.
  • the transceiver 620 is configured to send the configuration information.
  • This embodiment of this application provides the network device.
  • the network device uses the configuration information of the control channel resource set to indicate the time-frequency resource of the control channel.
  • the time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks. Therefore, even if a relatively large quantity of signal paths are generated in a channel environment, a terminal device may obtain a better frequency diversity gain when receiving the control information on the control channel, to improve transmission efficiency.
  • the components in the network device 600 are connected.
  • the processor 610 , the memory 620 , and the transceiver 630 communicate with each other through an inner connection path, to transmit a control signal and/or a data signal.
  • the foregoing method embodiments in this application may be applied to the processor, or the processor implements the steps in the foregoing method embodiments.
  • the processor may be an integrated circuit chip and has a signal processing capability.
  • the steps in the foregoing method embodiments can be implemented by using a hardware integrated logical circuit in the processor, or by using instructions in a form of software.
  • the processor may be a central processing unit CPU, an NP, a combination of a CPU and an NP, a DSP, an ASIC, an FPGA or another programmable logic device, a discrete gate or a transistor logic device, or a discrete hardware component.
  • the processor may implement or perform the methods, steps, and logical block diagrams that are disclosed in this application.
  • the general-purpose processor may be a microprocessor, or the processor may be any conventional processor or the like. The steps of the methods disclosed with reference to this application may be directly executed and accomplished by a hardware decoding processor, or be executed and accomplished by using a combination of hardware and software modules in a decoding processor.
  • a software module may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register.
  • the storage medium is located in the memory, and the processor reads information in the memory and implements the steps in the foregoing methods in combination with hardware of the processor.
  • the time-frequency resource block includes at least one resource element group REG set, and the REG set includes a plurality of REGs that are consecutive or adjacent in time domain or in frequency domain.
  • the interval between two adjacent time-frequency resource blocks includes, in frequency domain, a frequency domain resource corresponding to an integer quantity of REGs or a frequency domain resource corresponding to an integer quantity of REG sets.
  • offset that is of a frequency domain center location of the resource set and that is relative to a frequency domain center location of a synchronization signal block is predefined, or is indicated by the configuration information; and the synchronization signal block includes the configuration information.
  • At least one of the quantity of time-frequency resource blocks and the interval between two adjacent time-frequency resource blocks is predefined.
  • At least one of a quantity of REG sets included in the time-frequency resource block and a quantity of REGs included in the REG set is predefined, or is indicated by the configuration information.
  • the provided control channel is inconsecutive in an entire frequency domain, and has a frequency domain interval.
  • the network device sends the control information on the control channel of this format, and may also obtain a better frequency diversity gain, to improve transmission efficiency.
  • frequency domain center locations of control channels of different cells have different offsets relative to the frequency domain center location of the control channel resource set, to be specific, control channels of different cells do not overlap in frequency domain, to reduce interference suffered by the different cells from neighboring cells when control information is received on the respective control channels in the different cells.
  • the configuration information of the control channel resource set is used to indicate the time-frequency resource of the control channel, to resolve a problem that the time-frequency resource of the control channel cannot be indicated in 5G.
  • a network device 700 may include a processing module 710 , a storage module 720 , and a transceiver module 730 .
  • the network device 600 shown in FIG. 16 or the network device 700 shown in FIG. 17 can implement the steps performed by the network device in FIG. 13 . To avoid repetition, details are not described herein again.
  • An embodiment of this application further provides a computer readable medium, configured to store computer program code.
  • the computer program includes instructions used to execute the information transmission method according to the embodiments of this application in FIG. 4 and FIG. 8 .
  • the readable medium may be a read-only memory (read-only memory, ROM) or a random access memory (random access memory, RAM). This is not limited in this embodiment of this application.
  • An embodiment of this application further provides a communications system.
  • the communications system includes the terminal device provided in the foregoing embodiments of this application and the network device provided in the foregoing embodiments of this application.
  • the communications system may implement any information transmission method provided in the embodiments of this application.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the described apparatus embodiment is merely an example.
  • the unit division is merely logical function division and may be other division in actual implementation.
  • a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces.
  • the indirect couplings or communication connections between the apparatuses or units may be implemented in electronic, mechanical, or other forms.
  • the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solutions of the embodiments.
  • the functions When the functions are implemented in the form of a software function unit and sold or used as an independent product, the functions may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of this application essentially, or the part contributing to the prior art, or some of the technical solutions may be implemented in a form of a software product.
  • the computer software product is stored in a storage medium, and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, or the like) to perform all or some of the steps of the methods described in the embodiments of this application.
  • the foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disc.

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