WO2020094110A1 - 接收信号的方法、发送信号的方法及其装置 - Google Patents

接收信号的方法、发送信号的方法及其装置 Download PDF

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Publication number
WO2020094110A1
WO2020094110A1 PCT/CN2019/116442 CN2019116442W WO2020094110A1 WO 2020094110 A1 WO2020094110 A1 WO 2020094110A1 CN 2019116442 W CN2019116442 W CN 2019116442W WO 2020094110 A1 WO2020094110 A1 WO 2020094110A1
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Prior art keywords
index number
signal
time
control channel
cce
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PCT/CN2019/116442
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English (en)
French (fr)
Inventor
陈铮
薛丽霞
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19881338.8A priority Critical patent/EP3866539A4/en
Publication of WO2020094110A1 publication Critical patent/WO2020094110A1/zh
Priority to US17/314,679 priority patent/US20210266837A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • 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
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the communication field, and more specifically, to a method of receiving a signal, a method of transmitting a signal, and a device thereof in the field of communication.
  • the terminal device will work in a larger radio frequency and baseband bandwidth, and the terminal device can be configured with a discontinuous reception (DRX) processing process. If the terminal device is not in the DRX cycle During the active time (active time), the terminal device can stop detecting the PDCCH to reduce power consumption, thereby improving battery life. In a DRX cycle, the terminal device needs to first wake up from the sleep state, turn on the radio frequency and baseband circuits, obtain time-frequency synchronization, and then start a timer to detect the PDCCH during the "onduration" time period. These processes require a lot of work Consume. Generally speaking, data transmission tends to be bursty and sparse in time. If the base station does not have any data scheduling for the terminal equipment during the "onduration" time period, it is unnecessary for the terminal equipment. energy consumption.
  • DRX discontinuous reception
  • a wake-up signal is introduced in the NR, and a method of combining WUS with the DRX mechanism in the RRC_CONNECTED state.
  • each DRX cycle "on duration" time zone corresponds to a WUS time at which WUS is sent (WUSoccasion), and the base station can transmit discontinuously for the terminal equipment at the WUS time (discontinuous transmission, DTX) )
  • WUS the base station decides whether to send WUS at the time of WUS according to the demand of scheduling data, and the terminal device needs to detect WUS at the time of WUS to judge whether the base station sends WUS.
  • the terminal device When the terminal device is in the sleep state, it can be in a state of extremely low power consumption, for example, the terminal device only turns on a part of the mode function or uses a simple receiving circuit to detect and demodulate WUS.
  • a new physical channel or signal For the transmission of WUS, a new physical channel or signal can be introduced.
  • the introduction of new physical channels or signals for WUS will increase the extra consumption of network-side resources.
  • it may be necessary to perform rate matching for the newly introduced WUS which is not conducive to the flexibility of the base station in scheduling data resources for the terminal device.
  • the present application provides a method for receiving a signal, a method for transmitting a signal, and a device thereof, which can multiplex the resources of the control channel for the wake-up signal and improve the efficiency of using the resources.
  • a method for receiving a signal including: determining at least one time-frequency resource; detecting the first signal on the at least one time-frequency resource, the at least one time-frequency resource also used to carry a downlink control channel; According to the detection result of the first signal, it is determined whether to detect the first channel from the first time position.
  • the first signal in the present application may be a wake-up signal (WUS) or a sleep signal (Go to sleep, GTS), a "power saving signal” (power saving signal), or other signals having similar functions.
  • WUS is used to wake up the terminal device, so that the terminal device starts to detect the PDCCH from a certain time position.
  • the sleep signal is used to instruct the terminal device to enter the sleep mode, that is, the low power consumption mode, the terminal device may stop detecting the PDCCH within a period of time before detecting the next sleep signal, and the energy-saving signal may be a collective name of the wake-up signal and the sleep signal, or both With the function of wake-up signal and sleep signal.
  • the terminal device can receive the first signal of different structure sent by the base station, such as a wake-up signal or a sleep signal (go to sleep GTS), by multiplexing existing channels or signal resources, Thereby, the efficiency of using resources on the network side is improved to flexibly meet the coverage requirements of the wake-up signal or sleep signal, and to ensure the reliability of the wake-up signal or sleep signal transmission.
  • a wake-up signal or a sleep signal go to sleep GTS
  • the first signal is generated according to the first sequence.
  • the WUS may carry some source bits or information bits, which can be used to indicate whether to wake up a terminal device or a group of terminal devices.
  • the source bit may not be subjected to channel coding processing.
  • the first signal may be generated according to a ZC sequence of a certain length, or may be obtained by channel coding the source bits or information bits, for example, using Reed-Muller codes or Kerdock codes. It should be understood that this application is not limited thereto.
  • the first signal has at least one structure, and the first signals with different structures are composed of different numbers of time-frequency units.
  • WUS can be pre-defined by 6 time-frequency resource units, that is, it has the same time-frequency structure as REG.
  • Each time-frequency resource unit is an OFDM symbol in the time domain and a resource block in the frequency domain.
  • determining the at least one time-frequency resource includes: determining the at least one time-frequency resource according to at least one first index number, and the at least one first index Each first index number in the number is the index number of the control channel unit CCE of the first control resource set (control resource set, CORESET).
  • the method further includes: determining the at least one first index number and the first control resource set according to higher layer signaling, wherein the at least one first An index number is directly carried by the higher layer signaling.
  • the first index number is the CCE index number of the candidate downlink control channel in the search space set, and the candidate downlink control in the search space set
  • the CCE index number of the channel is the CCE index number of the first control resource set.
  • the wake-up signal or the sleep signal can be interleaved and mapped in a REG bundle-like manner to obtain frequency diversity gain and improve channel estimation performance.
  • the corresponding wake-up signal or dormant signal transmission resource (at least one time-frequency resource) can send a downlink control channel to realize the multiplexing of the WUS and downlink control channel and improve the efficiency of resource use.
  • the first index number is the index of the CCE numbered i in the candidate downlink control channel with aggregation level L and number m in the search space set No., where 0 ⁇ i ⁇ L-1.
  • the method further includes: determining the aggregation level L, the number m of the candidate downlink control channel, and the number i of the CCE according to higher layer signaling, where the The aggregation level L, the candidate downlink control channel number m, and the CCE number i are directly carried by the higher layer signaling; or the aggregation level L, the candidate downlink control channel number m, and the CCE number i are determined according to a predefined value.
  • the at least one first index number is composed of index numbers of all CCEs of at least one candidate downlink control channel of at least one aggregation level in the search space set.
  • the terminal device determines the number m of the at least one aggregation level L and the M candidate downlink control channels of each aggregation level according to higher layer signaling, where M is an integer not less than 1.
  • the number of each candidate downlink control channel is m, m is not less than m L and not more than m L + M-1, Among them, the M and m L are directly carried or pre-defined by higher layer signaling.
  • the terminal device determining at least one time-frequency resource includes: determining the at least one time-frequency resource according to a mapping mode of the control channel unit CCE to the resource unit group REG, and the mapping mode is interleaved mapping or non-interlaced mapping.
  • the first signal has at least one structure, and the first signals of different structures are composed of different numbers of time-frequency units; wherein, according to at least one first The index number determines the at least one time-frequency resource, including:
  • At least one second index number is determined in the at least one first index number; according to the at least one second index number, the at least one time-frequency resource is determined; in the at least one time Detecting the first signal on the frequency resource includes: detecting the first signal of the structure on the at least one time-frequency resource.
  • the at least one second index number determined according to each structure of the first signal is selected from at least one candidate of at least one aggregation level in the search space set
  • the index numbers of all CCEs of the downlink control channel are composed, and at least one second index number determined according to different structures of the first signal belongs to the index number of the CCE of at least one candidate downlink control channel of different aggregation levels in the search space set.
  • the first signal further includes a reference signal for demodulating the first signal
  • the method further includes: demodulating / descrambling the reference signal according to the first identification, the first identification is the wake-up signal or The identification of the sleep signal.
  • the first identifier is configured through high-layer signaling.
  • the first channel is a downlink control channel
  • the first time position is the starting time position of the discontinuous reception activation time of the terminal device.
  • a method for transmitting a signal which includes: determining at least one time-frequency resource; transmitting the first signal on the at least one time-frequency resource, and the at least one time-frequency resource is also used to carry a downlink control channel.
  • the base station can send the first signal of different structure to the terminal device, such as a wake-up signal or a sleep signal, by multiplexing existing channel or signal resources, thereby improving the efficiency of network-side resources In order to meet the coverage requirements of the wake-up signal or sleep signal flexibly, and to ensure the reliability of the wake-up signal or sleep signal transmission.
  • the terminal device such as a wake-up signal or a sleep signal
  • the first signal is generated according to the first sequence.
  • the determining the at least one time-frequency resource includes: determining the at least one time-frequency resource according to at least one first index number, the at least one Each first index number in the first index number is an index number of the control channel unit CCE of the first control resource set.
  • the method further includes: determining the at least one first index number and the first control resource set, where the at least one first index number It is carried directly by high-level signaling; the high-level signaling is sent.
  • the first index number is the CCE index number of the candidate downlink control channel in the search space set
  • the CCE of the candidate downlink control channel in the search space set The index number is the CCE index number of the first control resource set.
  • the first index number is the CCE number i of the candidate downlink control channels with aggregation level L and number m in the search space set The index number, where 0 ⁇ i ⁇ L-1.
  • the method further includes: determining the aggregation level L, the candidate downlink control channel number m, and the CCE number i, where the aggregation level L , The number m of the candidate downlink control channel and the number i of the CCE are directly carried by the high-level signaling; the high-level signaling is sent; or
  • the aggregation level L, the candidate downlink control channel number m, and the CCE number i are determined.
  • the at least one first index number is composed of index numbers of all CCEs of at least one candidate downlink control channel of at least one aggregation level in the search space set .
  • the terminal device determines the number m of the at least one aggregation level L and the M candidate downlink control channels of each aggregation level according to higher layer signaling, where M is an integer not less than 1.
  • M is an integer not less than 1.
  • the number of candidate downlink control channels with aggregation level L is M
  • the number of each candidate downlink control channel is m, where m is not less than m L and not more than m L + M-1 , Where M and ML are directly carried or pre-defined by higher layer signaling.
  • the terminal device determining at least one time-frequency resource includes: determining the at least one time-frequency resource according to a mapping mode of the control channel unit CCE to the resource unit group REG, and the mapping mode is interleaved mapping or non-interlaced mapping.
  • the first signal has at least one structure, and the first signals with different structures are composed of different numbers of time-frequency units;
  • determining the at least one time-frequency resource according to at least one first index number includes:
  • At least one second index number is determined among the at least one first index number
  • Sending the first signal on the at least one time-frequency resource includes:
  • the first signal of the structure is sent.
  • the at least one second index number determined according to each structure of the first signal is determined by at least one aggregation level in the search space set.
  • the index numbers of all CCEs of a candidate downlink control channel are composed, and at least one second index number determined according to different structures of the first signal belongs to the index number of the CCE of at least one candidate downlink control channel of different aggregation levels in the search space set.
  • the first signal further includes a reference signal for demodulating the first signal
  • the method further includes: demodulating / descrambling the reference signal according to the first identification, the first identification is the wake-up signal or The identification of the sleep signal.
  • the first identifier is configured through high-layer signaling.
  • the first channel is a downlink control channel
  • the first time position is the starting time position of the discontinuous reception activation time of the terminal device.
  • an apparatus for receiving a signal may be a terminal device or a chip in the terminal device.
  • the device may include a processing unit and a transceiver unit.
  • the processing unit may be a processor, and the transceiving unit may be a transceiver;
  • the terminal device may further include a storage unit, the storage unit may be a memory; the storage unit is used to store instructions, the processing The unit executes the instructions stored in the storage unit, so that the terminal device performs the corresponding function in the first aspect described above.
  • the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, or a circuit, etc .; the processing unit executes instructions stored in the storage unit to enable the terminal
  • the device performs the corresponding function in the first aspect described above.
  • the storage unit may be a storage unit within the chip (eg, registers, cache, etc.), or a storage unit located outside the chip within the terminal device (eg, only Read memory, random access memory, etc.).
  • an apparatus for sending a signal may be a network device or a chip in the network device.
  • the device may include a processing unit and a transceiver unit.
  • the processing unit may be a processor, and the transceiving unit may be a transceiver;
  • the network device may further include a storage unit, and the storage unit may be a memory; the storage unit is used to store instructions, the processing The unit executes the instructions stored by the storage unit, so that the network device performs the corresponding function in the second aspect.
  • the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, or a circuit, etc .; the processing unit executes instructions stored in the storage unit to enable the network
  • the device performs the corresponding function in the second aspect above, and the storage unit may be a storage unit within the chip (eg, registers, cache, etc.), or a storage unit located outside the chip within the network device (eg, only Read memory, random access memory, etc.).
  • a communication system in a fifth aspect, includes the terminal device in the third aspect and the network device in the fourth aspect.
  • a computer program product includes: computer program code, which, when the computer program code runs on a computer, causes the computer to execute the method in the above aspects.
  • a computer-readable medium stores program code, and when the computer program code runs on a computer, the computer is caused to perform the method in the above aspects.
  • FIG. 1 is a schematic structural diagram of a mobile communication system applicable to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an example of a transmission block and a code block provided by an embodiment of the present application.
  • FIG. 3 is a schematic configuration diagram of an example of DMRS provided by an embodiment of the present application.
  • FIG. 4 is a schematic interaction diagram of an example of a wake-up signal transmission method provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of yet another example of transport block division provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of an example of a wake-up signal transmission device provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of yet another example of a wake-up signal transmission device provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of yet another example of a wake-up signal transmission device provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of yet another example of a wake-up signal transmission device provided by an embodiment of the present application.
  • FIG. 10 is a schematic interaction diagram of an example of a wake-up signal transmission method provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of an example of a mapping relationship between WUS resources and CCE in CORESET provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of the relationship between an REG bundle index and a REG index provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of determining the CCE index number associated with WUS through parameters L, m, and i.
  • 16 is a schematic diagram of another example of the CCE index associated with the candidate WUS resource.
  • FIG. 17 is a schematic block diagram of an example of a wake-up signal transmission device provided by an embodiment of the present application.
  • FIG. 18 is a schematic block diagram of yet another example of a wake-up signal transmission device provided by an embodiment of the present application.
  • 19 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • 20 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • NR new radio
  • FIG. 1 is a schematic structural diagram of a mobile communication system applicable to an embodiment of the present application.
  • the mobile communication system 100 may include a core network device 110, a radio access network device 120, and at least one terminal device (such as the terminal device 130 and the terminal device 140 in FIG. 1).
  • the terminal device is connected to the wireless access network device in a wireless manner
  • the wireless access network device is connected to the core network device in a wireless or wired manner.
  • the core network device and the wireless access network device may be independent and different physical devices, or they may integrate the functions of the core network device and the logical function of the wireless access network device on the same physical device, or may be a physical device It integrates the functions of some core network devices and some of the wireless access network devices.
  • the terminal device may be fixed or mobile.
  • FIG. 1 is only a schematic diagram, and the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1.
  • the embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.
  • the wireless access network device 120 is an access device in which the terminal device wirelessly accesses the mobile communication system.
  • the wireless access network device 120 may be: a base station, an evolved base station (evolved node B, eNB), a home base station, an access point (access point, AP) in a wireless fidelity (WIFI) system, a wireless network Relay nodes, wireless backhaul nodes, transmission points (transmission points, TP) or transmission and reception points (transmission and reception points, TRP), etc.
  • WIFI wireless fidelity
  • WIFI wireless fidelity
  • TP transmission points
  • TRP transmission and reception points
  • gNB in the NR system
  • a component or part of a base station Equipment such as central unit (CU), distributed unit (DU) or baseband unit (BBU), etc.
  • the specific technology and the specific device form adopted by the wireless access network device are not limited.
  • the wireless access network equipment is referred to as network equipment for short.
  • network equipment refers to wireless access network equipment.
  • the network device may refer to the network device itself, or may be a chip applied in the network device to complete the wireless communication processing function.
  • the terminal equipment in the mobile communication system 100 may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), or the like.
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, or a computer with wireless transceiver function, and may also be applied to virtual reality (virtual reality, VR) and augmented reality (augmented reality, AR). ), Industrial control, industrial driving, self-driving, remote medical, smart grid, transportation safety, smart city, and smart home ) Wireless terminals in such scenarios.
  • the foregoing terminal device and the chip applicable to the foregoing terminal device are collectively referred to as a terminal device. It should be understood that the embodiments of the present application do not limit the specific technology and the specific device form adopted by the terminal device.
  • first”, “second”, and “third” in the embodiments of the present application are only for distinction, and should not constitute any limitation to the present application.
  • first control resource set in the embodiment of the present application means a set of downlink control channels.
  • the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not be applied to the embodiments of this application
  • the implementation process constitutes no limitation.
  • pre-set and pre-configured can be pre-stored in the device (for example, including terminal devices and network devices) by corresponding codes, tables, or other available instructions
  • the information is implemented in a manner that is not limited in this application.
  • the time domain resources used by the network device and the terminal device for wireless communication may be divided into multiple wireless frames or time units.
  • multiple wireless frames may be continuous, or a preset interval may be set between some adjacent wireless frames, which is not particularly limited in the embodiment of the present application.
  • one radio frame may include one or more subframes; alternatively, it may be one or more time slots; or, it may also be one or more symbols.
  • the symbol is also called a time domain symbol, which may be an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol, or a single carrier frequency division multiple access (single carrier frequency division multiple access) , SC-FDMA) symbol, in which SC-FDMA is also called orthogonal frequency division multiplexing with conversion precoding (orthogonal frequency division multiplexing with transform precoding, OFDM with TP).
  • OFDM orthogonal frequency division multiplexing
  • SC-FDMA single carrier frequency division multiple access
  • SC-FDMA orthogonal frequency division multiplexing with conversion precoding
  • multiple time units have a time relationship in the time domain, and the time lengths corresponding to any two time units may be the same or different.
  • the unit of frequency band is Hertz (Hz), which refers to the part of the radio frequency spectrum between two specific frequency limits.
  • Hz Hertz
  • the frequency band is the frequency range between the highest frequency and the lowest frequency contained in the signal (considering that the frequency component must be greater than a certain value).
  • the frequency band is the frequency range between the highest frequency of the signal allowed to be transmitted and the lowest frequency of the signal allowed to be transmitted (considering that the attenuation must be within a certain range).
  • the frequency band is the frequency range between the highest frequency of the signal allowed to be transmitted and the lowest frequency of the signal allowed to be transmitted. If the two are very different, it can be considered that the frequency band is equal to the highest frequency of the signal allowed to be transmitted.
  • the frequency band is the frequency range between the highest frequency and the lowest frequency contained in the signal. If the two are very different, you can roughly think that the frequency band is equal to the highest frequency of the signal.
  • Bandwidth is simply referred to as "bandwidth”, sometimes referred to as necessary bandwidth, which is the difference between the highest and lowest frequencies of a signal when transmitting an analog signal, in Hz, that is, the bandwidth required to ensure the rate and quality of a certain transmitted information is allowed value.
  • Effective bandwidth The frequency range possessed by a signal is called the bandwidth of the signal. Most of the energy of the signal is often contained in a narrow frequency band, which is the effective bandwidth.
  • the carrier wave can be understood as a periodic oscillating signal operating at a pre-defined single frequency.
  • the carrier wave can be a sine wave or a non-sinusoidal wave such as a periodic pulse sequence.
  • Changing the carrier wave to express data in a form suitable for transmission is what we call modulation.
  • the modulated carrier wave is called a modulated signal, and it contains the full-wave characteristics of the modulated signal.
  • the transmitting device loads the data signal onto the carrier signal, and the receiving device receives the data signal according to the frequency of the carrier, and then extracts these signals to obtain the required data signal.
  • the sub-channel in multi-carrier communication is called a sub-carrier (subcarrier).
  • the basic unit in the frequency domain is a sub-carrier, and a sub-carrier can be 15 kHz.
  • the data stream is transformed into a parallel data stream, and different sub-carriers are used to carry the data signal.
  • FIG. 2 is an example of a grid of downlink time-frequency resources. As shown in FIG. 2, each element on the resource grid is called a resource element (resource element, RE).
  • RE resource element
  • the RE is the smallest physical resource, and one RE contains one subcarrier within one OFDM symbol.
  • the uplink time-frequency resource grid is similar to the downlink.
  • the basic time unit of downlink resource scheduling in NR is a slot.
  • a slot consists of 14 OFDM symbols in time.
  • the NR transmission process includes a frame with a time length of 10ms.
  • Each frame is divided into 10 subframes of the same size and a length of 1ms, and each subframe can contain one or more
  • the time slot for example, when the subcarrier is 15 kHz, it is determined that each subframe contains a time slot according to the subcarrier interval.
  • Each frame is identified by a system frame number (SFN).
  • SFN system frame number
  • the period of SFN is equal to 1024, so SFN repeats itself after 1024 frames.
  • the network device transmits a physical downlink shared channel (physical downlink shared channel, PDSCH) and a physical downlink control channel (physical downlink control channel, PDCCH) for the terminal device.
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • the terminal device needs to demodulate the PDCCH first.
  • the downlink control information (DCI) carried in the PDCCH contains relevant information required to receive the PDSCH, such as the location of the PDSCH time-frequency resources and the size of the time-frequency resources. Antenna configuration information, etc.
  • control channel unit control channel element (CCE), search space (search space), resource unit group (resource element group, REG), resource unit group (resource element group bundle), REG bundle), and control resource set (control resource set, CORESET), etc.
  • CCE control channel element
  • search space search space
  • resource unit group resource unit group
  • resource unit group resource unit group
  • resource unit group resource unit group
  • REG bundle resource unit group
  • REG bundle resource unit group
  • REG bundle control resource set
  • control resource set control resource set
  • the downlink control channel is transmitted in the control resource set CORESET, which includes multiple physical resource blocks (PRB) in the frequency domain; it includes 1 to 3 OFDM symbols in the time domain, and can be located anywhere in the time slot. position.
  • the size and time-frequency resource occupied by CORESET can be semi-statically configured according to high-level parameters.
  • a resource-element group is a physical resource unit that occupies one OFDM symbol in the time domain and one resource block in the frequency domain. That is, the REG includes 12 consecutive subcarriers in the frequency domain.
  • FIG. 3 is a schematic diagram of an example of REG resource structure. As shown in FIG. 3, one REG may include 12 REs. Among the 12 REs, 3 REs are used to map PDCCH demodulation reference signals, and 9 REs are used to map DCI REs. Among them, the REs used to map the PDCCH demodulation reference signal are evenly distributed in the REG, and are located on the subcarriers numbered 1, 5, and 9 in the REG.
  • a control channel element (control channel element, CCE) is a basic unit that constitutes a PDCCH. It can be understood that one CCE can be used to map 6 REGs of the PDCCH.
  • FIG. 4 is a schematic diagram of an example of CCE sets of PDCCH. As shown in FIG. 4, each CCE in CORESET will have a corresponding index number. Among them, the index number of the CCE is a logical concept, and each CCE index number will have a corresponding relationship with the index number of the 6 REGs that it maps.
  • a given PDCCH can be composed of 1, 2, 4, 8 and 16 CCEs, the specific value of which is determined by the DCI payload size (DCI payload) and the required coding rate, and the number of CCEs constituting the PDCCH is also It is called aggregation level (AL).
  • the network device can adjust the aggregation level AL of the PDCCH according to the actual transmitted wireless channel state to implement link adaptive transmission.
  • One CCE corresponds to 6 REGs on the physical resource, and the actual physical resource to which one CCE is mapped includes 72 REs, of which 18 REs are used for DMRS and 54 REs are used for DCI information transmission.
  • Resource unit bundles are multiple REGs that are continuous in the time and frequency domains.
  • the number of REGs that constitute a REG bundle includes 2, 3, and 6, and the PDCCH mapped in one REG bundle uses the same pre Precoder, that is, the terminal device can use the demodulation reference signal in the REG bundle to perform joint channel estimation in the time domain and / or frequency domain.
  • the number of REGs included in the REG bundle in the time and frequency domains is related to the configuration of the number of CORESET time domain symbols and the size of the REG bundle. The specific values can be as shown in Table 1 for examples of REG bundle time / frequency domain structures. 5 is the REG bundle structure diagram under different CORESET time domain symbols.
  • the search space is a set of candidate PDCCH (PDCCH candidate) at a certain aggregation level. Since the aggregation level of the PDCCH actually sent by the network device changes with time, and because there is no relevant signaling to inform the terminal device of the actual aggregation level of the PDCCH sent by the network device, the terminal device needs to blindly detect the PDCCH at different aggregation levels. The blindly detected PDCCH is called a candidate PDCCH. The terminal device decodes all candidate PDCCHs composed of CCEs in the search space. If the cyclic redundancy check (cyclic redundancy check, CRC) passes, the content of the decoded PDCCH is considered valid for the terminal device , And process the relevant information after decoding.
  • CRC cyclic redundancy check
  • the starting CCE index number of the candidate PDCCH needs to be divisible by the aggregation level of the candidate PDCCH.
  • the candidate PDCCH of aggregation level 2 can only start from the CCE sequence number divisible by 2, and the same principle applies to search spaces of other aggregation levels.
  • the CCE set where the search space is located may be further determined according to high-level parameters and predefined rules in the search space set configuration information.
  • the search space set configuration information may be carried in higher layer signaling or in physical layer signaling.
  • the high-level signaling may be radio resource control (RRC) signaling or media access control (MAC) layer signaling; the physical layer signaling may be downlink Control information DCI.
  • RRC radio resource control
  • MAC media access control
  • DCI downlink Control information
  • the terminal device may be in different states, one of which is the radio resource control connection state (RRC_CONNECTED).
  • RRC_CONNECTED the radio resource control connection state
  • the UE In the RRC_CONNECTED state, the UE has established an RRC context, that is, the terminal device has established an RRC connection, that is, the parameters necessary for communication between the terminal device and the radio access network device are known to both, RRC_CONNECTED state Mainly used for data transmission of terminal equipment.
  • DRX discontinuous reception
  • FIG. 6 is an example of the relationship between CORESET and the time-domain position of the search space.
  • the network device in DRX, can configure a DRX cycle for the terminal device in the RRC_CONNECTED state.
  • the DRX cycle contains an "onduration" time zone, which can be DRX timing
  • 7 is a schematic diagram of an example of a discontinuous reception cycle. As shown in FIG.
  • the terminal device can detect the PDCCH; if the terminal device does not detect the PDCCH within the "on duration” period, During the rest of the DRX cycle, the terminal device can turn off the receiving circuit and enter the sleep state, thereby reducing the power consumption of the terminal device.
  • the terminal device In NR, the terminal device will work in a larger radio frequency and baseband bandwidth, and in a DRX cycle, the terminal device needs to first wake up from sleep, turn on the radio frequency and baseband circuit, obtain time-frequency synchronization, and then in "onduration" PDCCH detection within the time period, these processes require a lot of energy consumption. Generally speaking, data transmission tends to be bursty and sparse in time. If the network device does not have any data scheduling for the terminal device during the "onduration" time period, then the terminal device will have a problem. Necessary energy consumption. Therefore, in order to save power, a wake-up signal (WUS) is introduced into the NR, and a method of combining WUS with the DRX mechanism in the RRC_CONNECTED state.
  • WUS wake-up signal
  • the method of the present application may be applicable to a communication system capable of using DRX mechanism.
  • the DRX mechanism of this application is introduced below.
  • DRX allows the terminal device to enter sleep mode (sleep mode or sleep mode) at certain times instead of monitoring the PDCCH, but wakes up from the sleep state when monitoring is needed, so that the terminal can be enabled
  • sleep mode short mode or sleep mode
  • the device achieves the purpose of power saving.
  • FIG. 8 shows a typical DRX cycle. As shown in FIG. 8, in this application, one DRX cycle may include an active period and an active period.
  • the activation period may also be called a running period (running time), that is, the running time of each DRX timer of the terminal device.
  • the activation period in FIG. 8 may include a duration timer running period, an inactive timer running period, and retransmission. Timer running period.
  • the terminal device can communicate with the network device during the activation period to detect the downlink control channel. As shown in FIG. 8, during the activation period, the terminal device monitors the downlink PDCCH time slot, and during this period, the terminal device is in the awake state.
  • the sleep period may also be called a DRX opportunity (opportunity for DRX) period. The terminal device may not perform data transmission during the sleep period. As shown in FIG.
  • the terminal device goes to sleep without monitoring the time of the PDCCH slot in order to save power. It can be seen from FIG. 8 that the longer the DRX sleep time, the lower the power consumption of the terminal device, but correspondingly, the delay of service transmission will also increase.
  • the terminal device can receive downlink data and uplink authorization during the activation period.
  • the terminal device can perform DRX cycle according to the paging cycle in the idle mode.
  • the terminal device may use a variety of timers to cooperate in the radio resource control (RRC) connection state to ensure the reception of downlink data and uplink authorization. Subsequently, the above-mentioned timer will be described in detail.
  • RRC radio resource control
  • the DRX function control entity may be located in the MAC layer of the protocol stack, and its main function is to control the sending of instructions to the physical layer to notify the physical layer to monitor the PDCCH at a specific time, and the receiving antenna will not be turned on in the rest of the time, and is in a sleep state.
  • the DRX cycle may include a short DRX cycle and a long DRX cycle.
  • one DRX cycle may be equal to the sum of the activation period and the sleep time.
  • the communication system can configure the terminal device with a short DRX cycle (short DRX cycle) or a long DRX cycle (long DRX cycle) according to different business scenarios.
  • the voice codec when performing voice services, the voice codec usually sends one voice data packet every 20 milliseconds (ms).
  • ms milliseconds
  • a short DRX cycle with a length of 20 ms can be configured, and a longer silent period during a voice call.
  • Long DRX cycle can be configured.
  • the short DRX cycle and the short DRX cycle timer are included in the terminal device's own configuration, it will operate according to the short DRX cycle, and will enter the long DRX cycle operation state after the short DRX cycle timer expires.
  • timer used in the DRX mechanism is exemplarily described.
  • Duration timer (drx-on duration or drx-on duration)
  • the drx-on duration timer is used to determine the duration of "on duration". During the operation of the drx-on duration timer, or before the drx-on duration timer expires, the terminal is in the "on duration" period. Detect PDCCH.
  • DRX inactive timer (drx-inactivity timer or drx-inactivity timer)
  • the network side happens to have a large byte of data that needs to be sent to the terminal device. These data cannot be completely sent in the time slot n. If executed according to the drx-on duration timer, the terminal device will enter the DRX sleep state at time slot n + 1, will no longer monitor the PDCCH, and cannot receive any downlink PDSCH data from the network side. The network side can only wait until the end of the DRX cycle and continue to send data that has not been transmitted to the terminal device when the next on-duration period arrives, which will significantly increase the processing delay of all services.
  • drx-inactivity timer is added to the DRX mechanism. If the drx-inactivity timer is running, even if the originally configured on-duration timer expires (that is, the on-duration period ends), the terminal device still needs to continue to monitor the downlink PDCCH subframe until the drx-inactivity timer expires. After adding the drx-inactivity timer mechanism, it will obviously reduce the data processing delay.
  • DRX retransmission timer (DRX retransmission timer DL or drx-retransmission timer DL)
  • DRX retransmission timer means that the terminal device needs to wait for the minimum number of time slots before receiving the expected downlink retransmission data.
  • DRX retransmission timer DL refers to the length of time that the terminal device monitors the PDCCH in order to receive the data that needs to be retransmitted in order to receive the unsuccessful transmission after the HARQ RTT timer times out.
  • the activation period may include a period corresponding to at least one of the timers in the above on timer, drx-inactivity timer, and DRX retransmission timer running.
  • timers listed above are only exemplary descriptions, and the present application is not limited thereto.
  • the timer and DRX work mode is used, and the network device also maintains the same DRX work mode as the terminal device, and understands in real time whether the terminal device is in an active period or a sleep period Therefore, it is guaranteed that data will be transferred during the active period, and no data transmission will be performed during the sleep period.
  • each terminal device can be configured with two DRX cycle parameters: drx-long cycle (ranging from 10 to 10240ms) and drx-short cycle (ranging from 2 to 640ms), and one is a long DRX cycle (long DRX cycle) ), The other is short DRX cycle (short DRX cycle).
  • the terminal device can obtain the SFN where the starting position of "onduration" (that is, the starting time position) and the subframe number in the frame according to the following formula number:
  • V is the DRX cycle used by the terminal device. If the terminal device uses a long DRX cycle, the value of V is drx-long cycle; the value of Y is the parameter drx-start offset, which can be configured by high-level signaling and the unit is 1ms. If the terminal equipment uses a short DRX cycle, the value of V is drx-short cycle; the value of Y is (drx-short cycle) modulo (drx-short cycle), and the unit is also 1 ms.
  • the starting position of “on duration” can also be understood as the starting position of DRX cycle.
  • the scheduling unit of NR is a slot, and for subcarriers greater than 15kHz, a subframe can contain multiple slots (for example, for a subcarrier interval of 60kHz, a subframe can contain 4 slots) Therefore, the higher layer signaling configures the terminal device with the parameter drx-slot offset, and the terminal device uses this parameter to further determine the slot where the start time position of "on duration" (also DRX cycle) is located, and the slot is located in the subframe.
  • the starting position of "on duration” can also be understood as the starting position of DRX cycle.
  • FIG. 9 is a schematic diagram of an example of a combination of a wake-up signal and the DRX mechanism in the RRC_CONNECTED state.
  • WUSoccasion the WUS moment, which can be understood as the subframe or slot where WUS is located
  • the network device can send WUS in the form of discontinuous transmission (DTX) for the terminal device on "WUSoccasion", that is, the network device decides whether to send WUS on "WUSoccasion” according to the needs of scheduling data, and the terminal device needs to "WUSoccasion” detects WUS to determine whether the network device sends WUS.
  • DTX discontinuous transmission
  • the terminal device When the terminal device is in "sleep” state, it can detect and demodulate WUS with a very low power consumption state (such as turning on only part of the modem function or using a simple receiving circuit). With reference to the schematic diagram of FIG. 9, when the terminal device does not detect WUS on “WUS” or “WUS detected” indicates that the terminal device does not have data scheduling within the corresponding “on duration” time period, the terminal device can directly enter the sleep state. There is no need to detect the PDCCH during the "onduration" period.
  • the terminal device detects WUS on the "WUSoccasion” or the detected WUS indicates that the terminal device has data scheduling within the corresponding "onduration” time period, then the terminal device will be “wake up” from the sleep state "That is, the terminal device can start the timer according to the DRX mechanism process described above to detect the PDCCH. At this time, the terminal device needs enough time to enable all modem functions, so that the terminal device can detect the PDCCH in the DRX cycle. Receive data channel; therefore, there is a period of time between "WUSoccasion” and “onduration” starting time position, which can be called “WUS offset” (WUS offset), also known as gap value,
  • WUS offset WUS offset
  • the parameter T is generally used to represent this time interval. This parameter can be configured by high-level signaling (the value range is a few milliseconds to hundreds of milliseconds). The network device can determine the value of this parameter according to the capabilities reported by the terminal device.
  • NR for the design of WUS, a possible solution is to introduce a new physical channel or signal for WUS, for example, in the narrowband Internet of Things (NB-IoT) technology of LTE, it is WUS
  • An independent sequence is designed, for example, a sequence based on Zadoff-Chu (ZC), the sequence length is 132, or it can be obtained by channel coding the source bits or information bits, for example, using Reed-Muller codes or Kerdock codes. It should be understood that this application is not limited thereto.
  • ZC Zadoff-Chu
  • the introduction of new physical channels or signals for WUS will increase the extra consumption of resources on the network side.
  • the WUS signal may be introduced in the NR R16 version, so for some terminal devices that only support the NR R15 version, it may be necessary to perform rate matching for the newly introduced WUS when receiving PDSCH, which is not conducive to the network
  • the flexibility of the device to schedule data resources for the terminal device may be introduced in the NR R16 version, so for some terminal devices that only support the NR R15 version, it may be necessary to perform rate matching for the newly introduced WUS when receiving PDSCH, which is not conducive to the network.
  • the present application proposes a transmission method of a wake-up signal.
  • the existing channel or signal resources in the NR are multiplexed, thereby improving the use efficiency of the network-side resources.
  • FIG. 10 is a schematic flowchart of an example of a method 1000 for receiving a signal provided by an embodiment of the present application.
  • the method 1000 can be applied to the terminal device 130 or the terminal device 140 of the wireless communication system 100 described above.
  • the terminal device and the network device are used as the execution subject for example for description.
  • the execution subject may also be a chip applied to a terminal device and a chip applied to a network device.
  • the method 1000 includes the following.
  • the terminal device determines at least one time-frequency resource.
  • the network device also determines the at least one time-frequency resource.
  • the terminal device may determine the at least one time-frequency resource according to at least one first index number.
  • the at least one first index number may be an index number of a control channel element (CCE) of a first control resource set (control resource set, CORESET).
  • CCE control channel element
  • the at least one first index number may be carried in higher layer signaling or physical layer signaling.
  • the high-layer signaling may be radio resource control RRC signaling, or media access control MAC layer signaling; the physical layer signaling may be downlink control information DCI.
  • the network device sends the first signal on the at least one time-frequency resource.
  • the terminal device detects the first signal on the at least one time-frequency resource.
  • the at least one time-frequency resource is also used to carry a downlink control channel.
  • the first signal in the present application may be a wake-up signal (WUS) or a sleep signal (Go to sleep, GTS), a "power saving signal” (power saving signal), or other signals having similar functions.
  • WUS is used to wake up the terminal device, so that the terminal device starts to detect the PDCCH from a certain time position.
  • the sleep signal is used to instruct the terminal device to enter the sleep mode, that is, the low power consumption mode, the terminal device may stop detecting the PDCCH within a period of time before detecting the next sleep signal, and the energy-saving signal may be a collective name of the wake-up signal and the sleep signal, or both With the function of wake-up signal and sleep signal.
  • the first signal is generated according to the first sequence.
  • the first signal may be generated according to a ZC sequence of a certain length, or may be generated according to a Gold sequence of a certain length, or according to a pseudo-random sequence of a certain length.
  • the first signal can also be obtained by channel coding the source bits or information bits, such as Reed-Muller coding or Kerdock coding, or short transmission format coding (transport format combination indicator, TFCI). It should be understood that this application is not limited thereto.
  • the first signal can also be replaced with a first channel, such as the following control channel.
  • the first signal may be a reference signal, such as a demodulation reference signal DMRS, or a CSI reference signal CSI-RS, or a tracking reference signal TRS.
  • DMRS demodulation reference signal
  • CSI-RS CSI reference signal
  • TRS tracking reference signal
  • the source bits may not undergo channel coding processing, and the first signal may carry some source bits or information bits, which may be used to indicate whether to wake up a terminal device or a group of terminal devices.
  • the first signal has at least one structure, and the first signals with different structures are composed of different numbers of time-frequency units.
  • WUS pre-defined is composed of 6 time-frequency resource units, that is, it has the same time-frequency structure as REG.
  • Each time-frequency resource unit is an OFDM symbol in the time domain and a resource block in the frequency domain.
  • 2, 3, or 4 REs may be used to map the demodulation reference signal of the first signal, and the remaining REs may be used to map modulation symbol data of the first signal.
  • time-frequency resource unit of WUS is not necessarily equivalent to REG.
  • the number of demodulation reference signals included in the time-frequency resource unit is not necessarily the same as the number of demodulation reference signals included in the REG.
  • the first signal further includes a reference signal for demodulating the first signal
  • the method further includes: demodulating / descrambling the reference signal according to the first identification, the first identification is the wake-up signal or The identification of the sleep signal.
  • the first identifier is configured through high-layer signaling.
  • the terminal device determines whether to detect the first channel from the first time position according to the detection result of the first signal.
  • the first time position may be the starting position corresponding to the DRX cycle, or the starting position corresponding to the "on duration" of the DRX cycle, or the starting position corresponding to the start position corresponding to the DRX cycle or "on duration”
  • the terminal device may start a first timer (the first timer may be a drx-onDurationTimer) on the starting time slot or subframe (ie, the first time position), or may start to detect the first channel.
  • the first time position may be the starting position of the active period of the DRX cycle of the terminal device, and the DRX cycle activation time includes the length of "onduration" or the first timing The length of the device.
  • the first channel may be a PDCCH or a data channel PDSCH, which is not limited in this embodiment of the application.
  • the above-mentioned first channel may also be replaced with a reference signal or other signal used for channel state information (channel state information (CSI) measurement or time-frequency tracking / synchronization).
  • CSI channel state information
  • the WUS when the first signal is WUS, the WUS is used to wake up the terminal device, and the terminal device that detects WUS starts to detect the PDCCH from the first time position.
  • the terminal device receives the wake-up signal at the WUS moment, and after a period of time, detects the PDCCH in the shaded period.
  • FIG. 11 is a schematic diagram of an example of a mapping relationship between WUS resources and CCE in CORESET provided by an embodiment of the present application.
  • the terminal device may determine the at least one time-frequency resource according to at least one first index number, and each of the at least one first index number is a control channel unit of a first control resource set (CORESET) The index number of the CCE.
  • the network device may also determine the at least one time-frequency resource according to the at least one first index number.
  • the terminal device may determine the at least one first index number and the first control resource set according to higher layer signaling.
  • the at least one first index number is directly carried by the higher layer signaling.
  • the terminal device may determine the CORESET by acquiring the CORESET index number or ID number associated with WUS carried in the higher layer signaling, and then determine the CCE in the CORESET according to the CCE index number carried in the higher layer signaling, thereby determining the The resource where the REG mapped by the CCE is located.
  • the WUS-related parameters can be configured for the terminal device through high-level signaling.
  • the following parts of the relevant parameters can be included:
  • CORESET index number or ID number associated with WUS, or related parameters of CORESET associated with WUS can also be configured, including CORESET frequency domain position, time domain length, CCE to REG mapping type, REG bundle size value L, etc. .
  • the terminal device and the network device may directly determine the downlink control resource set according to the CORESET index number or ID number included in the information of the downlink control resource set; or, the terminal device and the network device may determine the frequency domain position and time domain of CORESET Parameter information such as length, CCE to REG mapping type, REG bundle size value L, etc., determine the CORESET index number, thereby determining the downlink control resource set.
  • the time-frequency resource location of the WUS can be determined more accurately.
  • the CCE index parameter j associated with the WUS that is, the resources of the WUS in the CORESET are: the resources where the REG mapped by the CCE with the index j in the CORESET is located.
  • the CCE index parameter j associated with the WUS is the first index number.
  • the candidate CCE associated with the WUS may be pre-configured, for example, may be pre-configured to CCE index 0. Or it may be indicated by the network device to the terminal device through dynamic signaling (such as DCI), or the candidate CCE is determined according to at least one of the parameters in (1) and (2) above.
  • the embodiment of the present application does not limit the manner of determining the CCE index j associated with the WUS.
  • CCE index parameter j associated with multiple WUSs may be configured, corresponding to different first index numbers.
  • different WUS may be associated with the same CCE index number in the same CORESET, that is, share the same time-frequency resources in CORESET. Therefore, when the terminal device detects the WUS, it may detect other WUS at the same location and generate a false alarm.
  • the network device may scramble the detected WUS according to the WUS identifier, such as the WUS number n WUS_ID , during the WUS generation process.
  • the terminal device receives the WUS signal, it can descramble the detected WUS according to the WUS identifier, for example, the WUS number n WUS_ID .
  • the DMRS used to demodulate WUS can be scrambled using the WUS number value n WUS_ID to avoid false alarms. That is, the initialization parameter of the WUS DMRS sequence includes the WUS number value n WUS_ID .
  • the WUS number value can be 8 bits, and the initialization formula of WUS's DMRS can be written as:
  • l is the OFDM symbol number of the time slot where WUS is located
  • It is the number of the time slot where WUS is located.
  • the first identifier may be a WUS identifier, or a WUS number n WUS_ID .
  • a wake-up signal can be accurately sent to the target terminal device for different terminal devices, and only the corresponding terminal device can obtain the information of the wake-up signal, thereby avoiding false alarms generated by other terminal devices.
  • the terminal device determines the CORESET index number or ID number according to the information of the downlink control resource set, and further needs to determine the time-frequency resource for transmitting WUS to the time-frequency resource in CORESET.
  • the terminal device determining at least one time-frequency resource includes: determining the at least one time-frequency resource according to a mapping mode of the control channel unit CCE to the resource unit group REG, and the mapping mode is interleaved mapping or non-interlaced mapping.
  • each time-frequency resource unit is an OFDM symbol in the time domain and a physical resource block (PRB) in the frequency domain
  • the terminal device can determine the time-frequency resource of WUS in CORESET according to the mapping method (including interleaved mapping or non-interleaved mapping) of the control channel unit CCE to the resource unit group REG.
  • the time-frequency resource of WUS is the REG resource in CORESET to which the CCE corresponding to at least one first index number is mapped. Therefore, the time-frequency position of WUS in CORESET can be determined according to the mapping relationship between CCE, REG bundle, and REG.
  • the following describes the resource mapping mode of the downlink control channel in CORESET, that is, the relationship between CCE, REG bundle, REG and CORESET.
  • resource mapping Before resource mapping, the network device needs to determine the CCE index of the transmitted PDCCH in the search space of the terminal device. Then, the corresponding physical resources are determined according to the correspondence between the CCE index and the REG bundle index. According to the different correspondences between the CCE index and the REG bundle index, resource mapping is further divided into interleaved mapping and non-interleaved mapping. Different mapping methods can be configured through high-level signaling. Under interleaved mapping, the REG after CCE mapping can be dispersed in the entire CORESET, and then the frequency diversity gain can be obtained. Under non-interleaved mapping, the REG after CCE mapping can be gathered in part of the time-frequency resources in CORESET.
  • the CCE index is denoted as j
  • the REG bundle index is denoted as u.
  • the REG index number corresponding to REG bundle is ⁇ uB, ..., uB + B-1 ⁇ , where REG index is the index number in CORESET that is sorted in order of time domain priority, and B is included in the REG bundle The number of REG.
  • FIG. 12 is a schematic diagram of the relationship between the REG bundle index and the REG index in CORESET provided by an embodiment of the present application. As shown in Figure 12, there are 2 OFDM symbols in the CORESET time domain and 48 PRBs in the frequency domain.
  • B 2
  • the REG index number corresponding to REG bundle 0 is ⁇ 0,1 ⁇
  • the REG corresponding to REG bundle 8 The index number is ⁇ 16,17 ⁇
  • the REG index number corresponding to REG bundle16 is ⁇ 32,33 ⁇ .
  • mapping function f (x) The corresponding relationship between the CCE index and the REG bundle index is represented by the mapping function f (x), where the REG bundle index corresponding to CCE j is ⁇ f (6j / B), f (6j / B + 1), ..., f (6j / B + 6 / B-1) ⁇ , the mapping function of f (x) is shown in Table 2.
  • R is a parameter configured by high-level signaling, and the value set is ⁇ 2,3,6 ⁇ ;
  • n shift is an offset parameter, used to randomize inter-cell interference;
  • the CORESET index number or ID number associated with WUS according to the WUS configuration information, then determine the CCE index number j according to the configured first index number, then determine the REG bundle index u according to the CCE index j, and finally The REG bundle index determines the mapped time-frequency resources, that is, the at least one time-frequency resource.
  • the network device and the terminal device may determine the resource where the WUS is located according to at least one parameter included in the information of the corresponding downlink control resource set configured in the above steps.
  • the determination method is: CCE index parameter j associated with WUS, the REG bundle index corresponding to CCE j is ⁇ f (6j / B), f (6j / B + 1), ..., f (6j / B + 6 / B- 1) ⁇ , B is the size of REG bundle, the expression of function f (x) is determined according to the mapping type of CCE to REG, see Table 2 above.
  • the corresponding REG index number is ⁇ uB, ..., uB + B-1 ⁇ .
  • the resources of these REGs are the resources where the WUS is located, and the network device and the terminal device can send and detect WUS on these resources, respectively.
  • WUS can perform interleaving mapping in a similar manner to REG bundle to obtain frequency diversity gain and improve channel estimation performance.
  • the corresponding WUS resource (at least one time-frequency resource) can send a downlink control channel to realize the multiplexing of the WUS and the downlink control channel and improve the resource use efficiency.
  • the terminal device may determine at least one time-frequency resource according to at least one first index number, where the first index number is the CCE index number of the candidate downlink control channel in the search space set, and the candidate in the search space set
  • the CCE index number of the downlink control channel is the CCE index number of the first control resource set.
  • the first index number is the index number of the CCE numbered i in the candidate downlink control channel with aggregation level L and number m in the search space set, where 0 ⁇ i ⁇ L-1. That is, for each candidate downlink control channel with aggregation level L, there are a total of L CCEs, numbered 0 to L-1.
  • CCE index number j refers to the index number of CCE in CORESET
  • CCE number i refers to the number of CCE in the candidate downlink control channel.
  • the terminal device may determine the aggregation level L, the candidate downlink control channel number m, and the CCE number i based on high-level signaling, where the aggregation level L, candidate downlink control channel number m, and CCE number i are determined by all The high-level signaling is carried directly; or the aggregation level L, the number m of the candidate downlink control channel, and the number i of the CCE are determined according to a predefined value.
  • the terminal device may determine the resource where the REG mapped by the CCE is located by acquiring the values of L, m, and i carried in the higher layer signaling.
  • the PDCCH can support multiple aggregation level sizes, and the aggregation level of the PDCCH sent by the network device to the terminal device cannot be obtained in advance for the terminal device, so the terminal device needs to perform blind detection on the PDCCH.
  • the terminal device detects the PDCCH at a limited CCE position, thereby avoiding the increase in the complexity of blind detection.
  • the search space configuration flexibility is further improved, that is, the aggregation level, the number of candidate control channels corresponding to the aggregation level, and the detection period of the search space in the time domain are both It can be configured through high-level parameters, and the complexity of blind detection can be flexibly controlled based on these configuration information.
  • the network device may configure one or more search space sets for the terminal device, where each search space set includes one or more search spaces of aggregation levels.
  • the configuration information of the search space set is shown in Table 3.
  • the time domain configuration information of the search space set includes: detection period, time slot offset, number of time slots, symbol position and control resource set (CORESET) index.
  • the detection period is 10 slots
  • the slot offset is 3 slots
  • the number of slots is 2 slots
  • the control resource set index corresponds to a CORESET that occupies 2 OFDM symbols.
  • the symbol positions are OFDM symbol 0 and OFDM symbol 7 in the slot.
  • the terminal equipment detects symbols 0 and 7 in slot 3 and slot 4 in each 10-slot period to detect CORESET, and CORESET occupies 2 OFDM symbols in the time domain.
  • the WUS-related parameters can be configured for the terminal device through high-level signaling.
  • the following parts of the relevant parameters can be included:
  • the search space set index or ID number associated with WUS may also be related parameters of the search space set associated with WUS, such as the parameters listed in Table 3, may include the search space set index Associated CORESET, aggregation level size, number of candidate control channels, symbol position, etc.
  • the terminal device and the network device can directly determine the downlink control resource set according to the CORESET index number or ID number included in the search space set information, that is, the first control resource set; the network device
  • the first index number is the index number of the CCE numbered i in the candidate downlink control channel with aggregation level L and number m in the search space set.
  • the parameter L may be predefined as 1, or the smallest aggregation level value where the number of candidate control channels in the search space set is not 0.
  • the parameter m may be predefined as 0.
  • the parameter i may be predefined as 0.
  • values of multiple parameters L, m, and i may be configured to determine multiple first index numbers.
  • the parameter n RNTI may also need to be configured.
  • the network device may scramble the detected WUS according to the WUS identification, such as the WUS number n WUS_ID , during the WUS generation process.
  • the terminal device receives the WUS signal, it can descramble the detected WUS according to the identifier of the WUS, for example, the WUS number n WUS_ID .
  • the CCE index of each candidate PDCCH in CORESET in NR is determined according to a given search space function. Specifically, according to the control resource set index parameters in Table 3, it is determined that for the related control resource set p and search space set s, the time slot The aggregation level is L and the number is (among them That is, the CCE index of the candidate control channel mentioned above is given by the following formula:
  • N CCE, p is the total number of CCEs included in the control resource set p, and the CCE numbers range from 0 to N CCE, p -1.
  • n CI 0, otherwise, n CI is the configured carrier indication parameter, so as to ensure that candidate PDCCHs scheduling different carriers occupy as many non-overlapping CCEs as possible.
  • the number of candidate control channels configured for the aggregation level L, serving cell n CI and search space set s can be determined by the number of candidate control channel parameters in Table 3;
  • the search space set is within s, and the aggregation level is L, which is the maximum value within the range of all n CI values.
  • i is the CCE number of the candidate downlink control channel.
  • the terminal device can detect the PDCCH on the REGs mapped by the CCEs of the six candidate PDCCHs.
  • the network device and the terminal device can determine the resource where the WUS is located according to the parameters configured in the above steps.
  • the values of the parameters L, m, and i in the formula can be obtained by configuring WUS-related parameters for the terminal device according to high-level signaling, and then obtaining the first index number j (that is, the corresponding CCE index number) according to formula 2.
  • the CCE index associated with WUS is one of ⁇ 4,5,6,7,16,17,18,19 ⁇ , which is one of the CCEs corresponding to the two candidate PDCCHs .
  • the index number j of the CCE used to transmit WUS can be determined through the configured parameters L, m, and i.
  • the remaining methods can refer to the process in Example 1, and then continue to determine the index number u of the REG bundle according to the index number j of CCE, and then determine the REG.
  • the time domain position of WUS in the time slot can be directly determined according to the starting position of the search space set in the time slot, that is, determined by the symbol position configuration parameter in Table 3, such as the first starting symbol that can be configured for this parameter position.
  • the time domain position of the WUS in the time slot can also be configured according to high-level signaling, such as through a bitmap, each bit represents an OFDM symbol in the time slot, for example, the terminal device can pass the bit value The bit for "1" determines the starting symbol position.
  • This application does not limit the configuration of the starting position of the search space set in the time slot.
  • WUS can perform interleaving mapping in a similar manner to REG bundle to obtain frequency diversity gain and improve channel estimation performance.
  • the corresponding WUS resource (at least one time-frequency resource) can send a downlink control channel to realize the multiplexing of the WUS and the downlink control channel and improve the resource use efficiency.
  • the terminal device determines multiple candidate time-frequency resources; accordingly, the network device may also determine multiple candidate time-frequency resources.
  • the terminal device may have multiple candidate resources in CORESET, and WUS needs to be detected on multiple candidate resources, and each candidate resource is associated with a CCE index in CORESET.
  • the terminal device may determine at least one first index number and first control resource set according to high-layer signaling, where the at least one first index number is directly carried by the high-layer signaling.
  • the at least one first index number is composed of index numbers of all CCEs of the M candidate downlink control channels of at least one aggregation level in the search space set, where M is an integer not less than 1.
  • the terminal device may determine at least one time-frequency resource according to the at least one aggregation level L carried in the higher layer signaling and the number m of the at least one candidate downlink control channel of each aggregation level.
  • the number of each candidate downlink control channel is m, and m is not less than m L and not more than m L + M-1, where M and ML is directly carried or pre-defined by higher layer signaling.
  • the value of i can be taken from 0 to L-1.
  • the terminal device may determine the resource where the REG mapped by the CCE is located according to the set including multiple candidate resources and the values of the aggregation levels L and m corresponding to each parameter in the set.
  • M should not be greater than the number of candidate downlink control channels with aggregation level L.
  • the number of each candidate downlink control channel may be separately configured by higher layer signaling.
  • the WUS-related parameters can be configured for the terminal device through high-level signaling, for example, the following parts of the relevant parameters can be included:
  • the index number or ID number of the search space set associated with WUS may also be related parameters of the search space set associated with WUS, such as the parameters listed in Table 3 above, including the CORESET and aggregation level associated with the search space set Parameters such as the size of L, the number of candidate control channels, and symbol position.
  • the parameter L i may be predefined as 1, or the smallest aggregation level value where the number of candidate control channels in the search space set is not 0.
  • Each parameter in the WUS candidate resource parameter set Corresponding can be configured by high-level signaling or can be predefined by the system.
  • parameter And corresponding Values are predefined as 0, still with For example, where correspond correspond correspond
  • the WUS after the WUS number value n WUS_ID is scrambled can prevent the terminal device from generating false alarms because it detects other WUS.
  • L i has the same meaning as the parameter L described above, and is an aggregation level.
  • multiple aggregation levels can be configured; Consistent with the meaning of M mentioned above, it is the number of candidate downlink control channels; The value of is consistent with the meaning of the aforementioned parameter m L and is used to determine the number of each candidate downlink control channel.
  • the at least one first index number includes the aggregation level L i in the search space set Index numbers of all CCEs of the candidate downlink control channels, and this The number of candidate downlink control channels is To At the same time, the value of CCE number i ranges from 0 to L i -1.
  • the terminal device determines each candidate resource of the WUS according to the parameters configured above.
  • the calculation formula of the CCE index parameter j (that is, each first index number) associated with each WUS candidate resource is:
  • I m is the number of candidates of downlink control channels, consistent with the previous meaning of the parameter m.
  • i is the CCE number of the candidate downlink control channel, and the meaning of the remaining parameters has been described in detail in Example 2, and is not repeated here for brevity.
  • the value of mi here can also be obtained according to the method described in Example 2.
  • the value of L i indicates that the CCE associated with the candidate WUS resource is the CCE of the candidate PDCCH whose aggregation level is L i .
  • the value indicates the number of associated PDCCH candidates with an aggregation level of L i , and is used to determine the number of CCEs associated with the candidate WUS resource, thereby controlling the number of times the terminal device detects WUS. Finally passed The index number of the associated candidate PDCCH whose aggregation level is L i is determined.
  • the filled blocks are CCEs of PDCCH candidates.
  • L 1 1
  • the CCEs associated with the candidate WUS resources are the CCEs of the first and second PDCCH candidates among the 6 candidate PDCCHs with an aggregation level of 1, that is, CCEs with index numbers 0 and 4 shown by hatching.
  • the CCE associated with the candidate WUS resource is the CCE of the first candidate PDCCH among the 6 candidate PDCCHs with an aggregation level of 2, that is, CCEs with index numbers 0 and 1. Therefore, there are three candidate positions for WUS, and the index numbers of the associated CCEs are 0, 1, and 4, respectively.
  • the network device can send WUS at any of these three candidate positions.
  • the remaining methods can refer to the process in method example one, and then continue to determine the REG according to the index number j of CCE The index number u of the bundle, and then the REG.
  • Example 1 and Example 2 have already been described in detail, and for the sake of brevity, they will not be repeated here.
  • WUS Wired Equivalent Function
  • other relevant parameters of WUS may be configured for the terminal device through high-level signaling, for example, the following relevant parameters may be included:
  • the index number or ID number of the search space set associated with WUS can also be the relevant parameters of the search space set associated with WUS, such as the parameters listed in Table 3, including the CORESET and aggregation level associated with the search space set , The number of candidate control channels, symbol positions, etc.
  • the terminal device determines each candidate resource of the WUS according to the configuration parameters listed above.
  • the terminal device may determine the resource according to the set including multiple candidate resources and the aggregation levels L, m, and i corresponding to each candidate resource in the set.
  • the terminal device obtains WUS candidate resource parameters according to the value of the integer K This parameter Meaning and in example three Has the same meaning.
  • the integer K is equivalent to an "attenuation factor" and is used to control the number of times the UE detects WUS.
  • the number of candidate downlink control channels with aggregation level L i associated with the WUS candidate resource is That is, the at least one first index number at least includes the aggregation level L i in the search space set The index numbers of all CCEs of the candidate downlink control channels.
  • the CCE index parameter j associated with each WUS candidate resource can be determined by the following methods:
  • each parameter Corresponding value is defined as 0, and can also be directly configured by the network device.
  • the method is the same as in the third embodiment.
  • the calculation formula of the CCE index parameter j associated with each WUS candidate resource is:
  • the value of k is used to determine the number of the candidate downlink control channel.
  • the first signal may have at least one structure, and the first signals of different structures are composed of different numbers of time-frequency units.
  • the first signal may have only one structure, for example, the first signal is composed of 6 time-frequency resource units.
  • the present invention is not limited to this, and the first signal in the previous three examples may have various structures.
  • the WUS of each structure may be composed of different numbers of time-frequency resource units.
  • the number of time-frequency resource units included in each WUS structure is equal to the number of REGs of a certain aggregation level of PDCCH. Therefore, the number of time-frequency resource units included in different WUS structures may be 6, 12, 24, and 48, respectively corresponding to PDCCHs with aggregation levels of 1, 2, 4, and 8, respectively.
  • the WUS may have two structures, structure one and structure two, the structure one WUS is composed of 6 time-frequency resource units, and the structure two WUS is composed of 12 time-frequency resource units, each time frequency
  • the resource unit is an OFDM symbol in the time domain and a resource block in the frequency domain. That is, the WUS and REG may have the same time-frequency structure.
  • the network device can dynamically adjust the structure of the sent WUS according to the actual wireless channel status of the transmission and the coverage requirements of the WUS to implement link adaptive transmission.
  • the terminal device does not know the structure of the WUS sent by the network device, so the terminal device needs to detect the WUS with different structures.
  • the configuration information or the network device may send instruction information to the terminal device to indicate the structure of the WUS to the terminal device.
  • the terminal device may determine at least one second index number among the at least one first index number according to each structure of the first signal; The at least one second index number determines the at least one time-frequency resource; the terminal device detects the first signal of the structure on the at least one time-frequency resource. That is, the first signals of different structures correspond to different index numbers, and the terminal device detects the first signal of the structure on the time-frequency resource determined according to the index number corresponding to the first signal of each structure.
  • the terminal device may determine at least one second index number according to each structure of the first signal by the index number of all CCEs of at least one candidate downlink control channel of at least one aggregation level in the search space set, according to At least one second index number determined by different structures of the first signal belongs to the index number of the CCE of at least one candidate downlink control channel of different aggregation levels in the search space set.
  • the network device may configure the parameters L i and Parameter L i and Can be determined according to the methods described above (including the methods described in Example 2 and Example 3), each parameter L i can correspond to a WUS structure that the terminal device needs to detect, and different parameters L i correspond to different structures WUS. Then, it can indicate the number of WUS candidates for the structure, and the terminal device can determine the structure of the detected WUS signal according to the configuration parameter. Then the at least one second index number determined for each WUS structure is determined by the corresponding aggregation level L i in the search space The index numbers of all CCEs of the candidate downlink control channels.
  • At least one second index number determined according to each different WUS structure belongs to the corresponding different aggregation level L i in the search space set
  • the index number of the CCE of the candidate downlink control channel
  • the WUS of structure 1 indicates that the WUS may be composed of 6 time-frequency resource units; It means that there are 2 WUSs of structure 1 among the candidate WUSs.
  • L i and The second index number can be determined according to Formula 3, and the value of mi in Formula 3 can be directly determined according to the method described above (including the methods described in Example 2 and Example 3).
  • the network device can dynamically choose to send WUS with different structures to flexibly meet the coverage requirements of WUS and ensure the reliability of WUS transmission.
  • WUS can perform interleaved mapping to obtain frequency diversity gain and improve channel estimation performance; at the same time, multiplexing control channel resources and resource mapping rules in CORESET facilitates backward compatibility and reduces standardization difficulty; When the network device does not send WUS, a control channel can be sent on the corresponding WUS resource to improve resource use efficiency.
  • network devices can dynamically choose to send WUS with different structures to flexibly meet WUS coverage requirements and ensure the reliability of WUS transmission.
  • the transmission method of the wake-up signal in the embodiment of the present application has been described in detail above with reference to FIGS. 1 to 16.
  • the wake-up signal transmission device according to an embodiment of the present application will be described in detail below with reference to FIGS. 17-20.
  • FIG. 17 shows a schematic block diagram of an apparatus 1700 for transmitting a wake-up signal according to an embodiment of the present application.
  • the apparatus 1700 may correspond to the terminal device described in the above method 1000, or may be a chip or component applied to the terminal device. Each module or unit in the apparatus 1700 is used to perform various actions or processing procedures performed by the terminal device in the above method 1000.
  • the communication apparatus 1700 may include a processing unit 1710 and a transceiver unit 1717.
  • the processing unit 1710 is configured to determine at least one time-frequency resource.
  • the processing unit 1710 is also used to control the transceiver unit to detect the first signal on the at least one time-frequency resource, and the at least one time-frequency resource is also used to carry the downlink control channel.
  • the processing unit 1710 is further configured to determine whether to detect the first channel from the first time position according to the detection result of the first signal.
  • the processing unit 1710 is used to execute S1010 and S1030 in the method 1000
  • the transceiving unit 1720 is used to execute S1020 in the method 1000.
  • the specific process for each unit to execute the above corresponding steps has been described in detail in the method 1000, and for the sake of brevity, details are not described here.
  • the apparatus 1800 may correspond to (for example, may be applied to or be itself) the network device (such as a base station) described in the above method 400, In addition, each module or unit in the apparatus 1800 is used to perform various actions or processing procedures performed by the network device in the above method 400.
  • the communication apparatus 1800 may include a processing unit 1810 and a transceiver unit 1820.
  • the processing unit 1810 is configured to determine at least one time-frequency resource.
  • the transceiver unit 1820 is configured to send a first signal on the at least one time-frequency resource, and the at least one time-frequency resource is also used to carry a downlink control channel.
  • the processing unit 1810 is used to execute S1010 in the method 1000
  • the transceiver unit 1820 is used to execute S1020 in the method 1000.
  • the specific process for each unit to execute the above corresponding steps has been described in detail in the method 1000, and for the sake of brevity, details are not described here.
  • FIG. 19 is a schematic structural diagram of a terminal device 1900 provided by an embodiment of the present application.
  • the terminal device 1900 includes a processor 1910 and a transceiver 1920.
  • the terminal device 1900 further includes a memory 1930.
  • the processor 1910, the transceiver 1920 and the memory 1930 communicate with each other through an internal connection channel to transfer control and / or data signals.
  • the memory 1930 is used to store computer programs, and the processor 1910 is used to call from the memory 1930 And run the computer program to control the transceiver 1920 to send and receive signals.
  • the processor 1910 and the memory 1930 may be combined into a processing device.
  • the processor 1910 is used to execute the program code stored in the memory 1930 to implement the functions of the terminal device in the foregoing method embodiments.
  • the memory 1930 may also be integrated in the processor 1910 or independent of the processor 1910.
  • the transceiver 1920 can be implemented by means of a transceiver circuit.
  • the above terminal device may further include an antenna 1940, configured to send the uplink data or uplink control signaling output by the transceiver 1920 through a wireless signal, or send the downlink data or downlink control signaling to the transceiver 1920 for further processing.
  • an antenna 1940 configured to send the uplink data or uplink control signaling output by the transceiver 1920 through a wireless signal, or send the downlink data or downlink control signaling to the transceiver 1920 for further processing.
  • the apparatus 1900 may correspond to the terminal device in the method 1000 according to the embodiment of the present application, and the apparatus 1900 may also be a chip or a component applied to the terminal device.
  • each module in the device 1900 implements the corresponding flow in the method 1000.
  • the memory 1930 is used to store program code, so that when the processor 1910 executes the program code, the processor 1910 is controlled to execute the method 1000 S1010 and S1030 in the figure control the transceiver 1920 to execute S1020 in the method 1000, and the specific process for each unit to perform the above corresponding steps has been described in detail in the method 1000, and will not be repeated here for brevity.
  • FIG. 20 is a schematic structural diagram of a network device 2000 provided by an embodiment of the present application.
  • the network device 2000 eg, network device
  • the network device 2000 includes a processor 2010 and a transceiver 2020.
  • the network device 2000 further includes a memory 2030.
  • the processor 2010, the transceiver 2020 and the memory 2030 communicate with each other through an internal connection channel to transfer control and / or data signals.
  • the memory 2030 is used to store a computer program, and the processor 2010 is used to be called from the memory 2030 And run the computer program to control the transceiver 2020 to send and receive signals.
  • the processor 2010 and the memory 2030 may be combined into a processing device.
  • the processor 2010 is used to execute the program code stored in the memory 2030 to implement the functions of the network device in the foregoing method embodiments.
  • the memory 2030 may also be integrated in the processor 2010 or independent of the processor 2010.
  • the transceiver 2020 can be implemented by means of a transceiver circuit.
  • the above network equipment may further include an antenna 2040, configured to send the downlink data or downlink control signaling output by the transceiver 2020 through a wireless signal, or send the uplink data or uplink control signaling to the transceiver 820 for further processing.
  • an antenna 2040 configured to send the downlink data or downlink control signaling output by the transceiver 2020 through a wireless signal, or send the uplink data or uplink control signaling to the transceiver 820 for further processing.
  • the apparatus 2000 may correspond to the network device in the method 1000 according to the embodiment of the present application, and the apparatus 2000 may also be a chip or a component applied to the network device.
  • each module in the device 2000 implements the corresponding process in the method 1000.
  • the memory 2030 is used to store program code, so that when the processor 2010 executes the program code, the processor 2010 is controlled to execute the method 1000 In S1010, the transceiver 2020 is controlled to execute S1020 in the method 1000, and the specific process for each unit to perform the above corresponding steps has been described in detail in the method 1000, and for the sake of brevity, no further description is provided here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic, and the division of the units is only a division of logical functions. In actual implementation, there may be another division manner, for example, multiple units or components may be combined.
  • the displayed or discussed mutual coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices, or units.
  • the functional units in the embodiments of the present application may be integrated into a physical entity, or each unit may correspond to a physical entity separately, or two or more units may be integrated into a physical entity.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供了一种接收信号的方法、发送信号的方法及其装置，该接收信号的方法包括：终端设备确定至少一个时频资源；在该至少一个时频资源上，检测唤醒信号或休眠信号，该至少一个时频资源还用于承载下行控制信道；根据对唤醒信号或休眠信号的检测结果，确定是否从第一时间位置开始检测下行控制信道，该方法通过复用已有的信道或者信号的资源，从而提高网络侧资源的使用效率，以灵活满足唤醒信号或者休眠信号的覆盖需求，保证唤醒信号或者休眠信号传输的可靠性。

Description

接收信号的方法、发送信号的方法及其装置
本申请要求于2018年11月09日提交中国专利局、申请号为201811333390.9、申请名称为“接收信号的方法、发送信号的方法及其装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及通信领域中接收信号的方法、发送信号的方法及其装置。
背景技术
在新无线(new radio，NR)通信系统中，终端设备会工作在更大的射频与基带带宽，可以为终端设备配置非连续接收(discontinuous reception，DRX)处理流程，如果终端设备没有处于DRX cycle的激活时间(active time)内，可以通过使终端设备停止检测PDCCH来降低功耗，从而提升电池使用时间。而在一个DRX cycle中，终端设备需要首先从睡眠状态唤醒，开启射频和基带电路，获取时频同步，然后开启一个定时器，在“on duration”时间段内检测PDCCH，这些过程需要不少功耗。而一般而言，数据传输在时间上往往具有突发性和稀疏性，如果在“on duration”时间段内基站对终端设备没有任何数据调度的话，那么对于终端设备而言就产生了不必要的能量消耗。
因此，为了节省功耗，在NR中引入唤醒信号(wake up signal，WUS)，并将WUS与RRC_CONNECTED状态下的DRX机制相结合的方法。对于支持WUS的终端设备，每一个DRX cycle的“on duration”的时间区域，对应一个发送WUS的WUS时刻(WUS occasion)，基站可在WUS时刻上为终端设备以不连续发送(discontinuous transmission，DTX)形式发送WUS，即基站根据调度数据的需求决定是否在WUS时刻上发送WUS，而终端设备需要在WUS时刻上通过检测WUS来判断基站是否发送WUS。当终端设备处于睡眠状态时，可以处于极低功耗的状态，例如终端设备仅开启部分模式的功能或使用一个简单的接收电路来检测和解调WUS。
对于WUS的传输，可以引入一种新的物理信道或信号。但是，对于WUS引入新的物理信道或信号会增加网络侧资源的额外消耗。于此同时，在接收PDSCH时可能还需要针对新引入的WUS进行速率匹配(rate matching)，不利于基站为终端设备调度数据资源的灵活性。
发明内容
本申请提供了一种接收信号的方法、发送信号的方法及其装置，可以为唤醒信号复用控制信道的资源，提高资源的使用效率。
第一方面，提供了一种接收信号的方法，包括：确定至少一个时频资源；在该至少一 个时频资源上，检测第一信号，该至少一个时频资源还用于承载下行控制信道；根据对该第一信号的检测结果，确定是否从第一时间位置开始检测第一信道。
应理解，本申请中第一信号可以是唤醒信号(WUS)或者休眠信号(go to sleep，GTS)，也可以是“节能信号”(power saving signal)，或者其他具有类似功用的信号。WUS用于唤醒终端设备，使得终端设备从某个时间位置开始检测PDCCH。休眠信号用于指示终端设备进入休眠模式，即低功耗模式，终端设备可在检测到下一个休眠信号之前的时间段内停止检测PDCCH，节能信号可以为唤醒信号和休眠信号的统称，或者同时具有唤醒信号和休眠信号的功能。
通过上述提供的唤醒信号的传输方法，终端设备可以接收基站发送的不同结构的第一信号，例如唤醒信号或者休眠信号(go to sleep GTS,)，通过复用已有的信道或者信号的资源，从而提高网络侧资源的使用效率，以灵活满足唤醒信号或者休眠信号的覆盖需求，保证唤醒信号或者休眠信号传输的可靠性。
结合第一方面，在第一方面的某些实现方式中，该第一信号是根据第一序列生成的。
可选地，WUS可以携带一些信源比特或者信息比特，可用于指示是否唤醒一个终端设备或者一组终端设备。这里信源比特可以没有经过信道编码处理。
例如，第一信号可以根据某一长度的ZC序列生成，也可以是通过对信源比特或者信息比特进行信道编码后得到，比如使用Reed-Muller码或者Kerdock码。应理解，本申请对此并不限定。
可选地，该第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成。
例如，WUS可以预定义由6个时频资源单元组成，即与REG具有相同的时频结构。每个时频资源单元在时域上为一个OFDM符号，在频域上为一个资源块。
结合第一方面和上述实现方式，在某些可能的实现方式中，确定该至少一个时频资源，包括：根据至少一个第一索引号，确定该至少一个时频资源，该至少一个第一索引号中的每个第一索引号为第一控制资源集合(control resource set，CORESET)的控制信道单元CCE的索引号。
结合第一方面和上述实现方式，在某些可能的实现方式中，该方法还包括：根据高层信令，确定该至少一个第一索引号和该第一控制资源集合，其中，该至少一个第一索引号由该高层信令直接携带。
结合第一方面和上述实现方式，在某些可能的实现方式中，该第一索引号为搜索空间集合(search space set)中候选下行控制信道的CCE索引号，该搜索空间集合中候选下行控制信道的CCE索引号为该第一控制资源集合的CCE索引号。
通过上述实施例提供的方案，唤醒信号或者休眠信号可以以类似REG bundle的方式进行交织映射，从而获取频率分集增益，提高信道估计性能。同时，当基站不发送WUS时，对应的唤醒信号或者休眠信号的传输资源(至少一个时频资源)上可以发送下行控制信道，实现WUS和下行控制信道的复用，提高资源使用效率。
结合第一方面和上述实现方式，在某些可能的实现方式中，该第一索引号为该搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号，其中0≤i≤L-1。
结合第一方面和上述实现方式，在某些可能的实现方式中，该方法还包括：根据高层信令，确定该聚合等级L、候选下行控制信道的编号m、CCE的编号i，其中，该聚合等级L、候选下行控制信道的编号m、CCE的编号i由该高层信令直接携带；或者根据预定义的值，确定该聚合等级L、候选下行控制信道的编号m、CCE的编号i。
结合第一方面和上述实现方式，在某些可能的实现方式中，该至少一个第一索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成。
可选地，终端设备根据高层信令确定该至少一个聚合等级L和该每个聚合等级的M个候选下行控制信道的编号m，M为不小于1的整数。
在一种可能的实现方式中，对于聚合等级为L的M个候选下行控制信道，所述每个候选下行控制信道的编号为m，m不小于m L且不大于m L+M-1，其中，该M与m L由高层信令直接携带或预定义。
可选地，终端设备确定至少一个时频资源，包括：根据控制信道单元CCE到资源单元组REG的映射方式，确定该至少一个时频资源，该映射方式为交织映射或非交织映射。
结合第一方面和上述实现方式，在某些可能的实现方式中，该第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成；其中，根据至少一个第一索引号，确定该至少一个时频资源，包括：
根据该第一信号的每一种结构，在该至少一个第一索引号中确定至少一个第二索引号；根据该至少一个第二索引号，确定该至少一个时频资源；在该至少一个时频资源上，检测第一信号，包括：在该至少一个时频资源上，检测该结构的第一信号。
结合第一方面和上述实现方式，在某些可能的实现方式中，该根据该第一信号的每一种结构确定的至少一个第二索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成，根据该第一信号的不同结构确定的至少一个第二索引号属于搜索空间集合中不同聚合等级的至少一个候选下行控制信道的CCE的索引号。
可选地，该第一信号还包括用于解调该第一信号的参考信号，该方法还包括：根据该第一标识解调/解扰该参考信号，该第一标识是该唤醒信号或休眠信号的标识。
在一种可能的实现方式中，该第一标识是通过高层信令配置的。
在另一种可能的实现方式中，该第一信道为下行控制信道，该第一时间位置为该终端设备非连续接收激活时间的起始时间位置。
第二方面，提供了一种发送信号的方法，包括：确定至少一个时频资源；在该至少一个时频资源上，发送第一信号，该至少一个时频资源还用于承载下行控制信道。
通过上述提供的唤醒信号的传输方法，基站可以向终端设备发送不同结构的第一信号，例如唤醒信号或者休眠信号，通过复用已有的信道或者信号的资源，从而提高网络侧资源的使用效率，以灵活满足唤醒信号或者休眠信号的覆盖需求，保证唤醒信号或者休眠信号传输的可靠性。
结合第二方面，在第二方面的某些实现方式中，该第一信号是根据第一序列生成的。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该确定该至少一个时频资源，包括：根据至少一个第一索引号，确定该至少一个时频资源，该至少一个第一索 引号中的每个第一索引号为第一控制资源集合的控制信道单元CCE的索引号。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该方法还包括：确定该至少一个第一索引号和该第一控制资源集合，其中，该至少一个第一索引号由高层信令直接携带；发送该高层信令。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该第一索引号为搜索空间集合中候选下行控制信道的CCE索引号，该搜索空间集合中候选下行控制信道的CCE索引号为该第一控制资源集合的CCE索引号。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该第一索引号为该搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号，其中0≤i≤L-1。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该方法还包括：确定该聚合等级L、候选下行控制信道的编号m、CCE的编号i，其中，该聚合等级L、候选下行控制信道的编号m、CCE的编号i由高层信令直接携带；发送该高层信令；或者
根据预定义的值，确定该聚合等级L、候选下行控制信道的编号m、CCE的编号i。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该至少一个第一索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成。
可选地，终端设备根据高层信令确定该至少一个聚合等级L和该每个聚合等级的M个候选下行控制信道的编号m，M为不小于1的整数。在一种可能的实现方式中，该聚合等级为L的候选下行控制信道的数量为M，该每个候选下行控制信道的编号为m，m不小于m L且不大于m L+M-1，其中，该M与m L由高层信令直接携带或预定义。
可选地，终端设备确定至少一个时频资源，包括：根据控制信道单元CCE到资源单元组REG的映射方式，确定该至少一个时频资源，该映射方式为交织映射或非交织映射。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成；
其中，根据至少一个第一索引号，确定该至少一个时频资源，包括：
根据该第一信号的每一种结构，在该至少一个第一索引号中确定至少一个第二索引号；
根据该至少一个第二索引号，确定该至少一个时频资源；
在该至少一个时频资源上，发送第一信号，包括：
在该至少一个时频资源上，发送该结构的第一信号。
结合第二方面和上述实现方式，在第二方面的某些实现方式中，该根据该第一信号的每一种结构确定的至少一个第二索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成，根据该第一信号的不同结构确定的至少一个第二索引号属于搜索空间集合中不同聚合等级的至少一个候选下行控制信道的CCE的索引号。
可选地，该第一信号还包括用于解调该第一信号的参考信号，该方法还包括：根据该第一标识解调/解扰该参考信号，该第一标识是该唤醒信号或休眠信号的标识。
在一种可能的实现方式中，该第一标识是通过高层信令配置的。
在另一种可能的实现方式中，该第一信道为下行控制信道，该第一时间位置为该终端设备非连续接收激活时间的起始时间位置。
第三方面，提供了一种接收信号的装置，该装置可以是终端设备，也可以是终端设备内的芯片。该装置可以包括处理单元和收发单元。当该装置是终端设备时，该处理单元可以是处理器，该收发单元可以是收发器；该终端设备还可以包括存储单元，该存储单元可以是存储器；该存储单元用于存储指令，该处理单元执行该存储单元所存储的指令，以使该终端设备执行上述第一方面中相应的功能。当该装置是终端设备内的芯片时，该处理单元可以是处理器，该收发单元可以是输入/输出接口、管脚或电路等；该处理单元执行存储单元所存储的指令，以使该终端设备执行上述第一方面中相应的功能，该存储单元可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是该终端设备内的位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)。
第四方面，提供了一种发送信号的装置，该装置可以是网络设备，也可以是网络设备内的芯片。该装置可以包括处理单元和收发单元。当该装置是网络设备时，该处理单元可以是处理器，该收发单元可以是收发器；该网络设备还可以包括存储单元，该存储单元可以是存储器；该存储单元用于存储指令，该处理单元执行该存储单元所存储的指令，以使该网络设备执行上述第二方面中相应的功能。当该装置是网络设备内的芯片时，该处理单元可以是处理器，该收发单元可以是输入/输出接口、管脚或电路等；该处理单元执行存储单元所存储的指令，以使该网络设备执行上述第二方面中相应的功能，该存储单元可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是该网络设备内的位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)。
第五方面，提供了一种通信系统，该系统包括上述第三方面的终端设备以及第四方面的网络设备。
第六方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第七方面，提供了一种计算机可读介质，所述计算机可读介质存储有程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
附图说明
图1是适用于本申请实施例的移动通信系统的架构示意图。
图2是本申请实施例提供的一例传输块与码块的示意图。
图3是本申请实施例提供的一例DMRS的配置示意图。
图4是本申请实施例提供的一例唤醒信号的传输方法的示意性交互图。
图5是本申请实施例提供的又一例传输块划分示意图。
图6是本申请实施例提供的一例唤醒信号的传输装置的示意图。
图7是本申请实施例提供的又一例唤醒信号的传输装置的示意图。
图8是本申请实施例提供的又一例唤醒信号的传输装置的示意图。
图9是本申请实施例提供的又一例唤醒信号的传输装置的示意图。
图10是本申请实施例提供的一例唤醒信号的传输方法的示意性交互图。
图11是本申请实施例提供的一例WUS资源与CORESET中CCE映射关系示意图。
图12是本申请实施例提供的一例REG bundle索引与REG索引之间的关系示意图。
图13是本申请实施例提供的聚合等级AL＝2的候选PDCCH的CCE索引号示意图。
图14是通过参数L，m，i确定WUS所关联的CCE索引号的示意图。
图15是一例候选WUS资源所关联的CCE索引示意图。
图16是又一例候选WUS资源所关联的CCE索引示意图。
图17是本申请实施例提供的一例唤醒信号的传输装置的示意性框图。
图18是本申请实施例提供的又一例唤醒信号的传输装置的示意性框图。
图19是本申请实施例提供的终端设备的结构示意图。
图20是本申请实施例提供的网络设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、第五代(5th generation，5G)移动通信系统或新无线(new radio，NR)通信系统以及未来的移动通信系统等。
图1是适用于本申请实施例的移动通信系统的架构示意图。如图1所示，该移动通信系统100可以包括核心网设备110、无线接入网设备120和至少一个终端设备(如图1中的终端设备130和终端设备140)。终端设备通过无线的方式与无线接入网设备相连，无线接入网设备通过无线或有线方式与核心网设备连接。核心网设备与无线接入网设备可以是独立的不同的物理设备，也可以是将核心网设备的功能与无线接入网设备的逻辑功能集成在同一个物理设备上，还可以是一个物理设备上集成了部分核心网设备的功能和部分的无线接入网设备的功能。终端设备可以是固定位置的，也可以是可移动的。图1只是示意图，该通信系统中还可以包括其它网络设备，如还可以包括无线中继设备和无线回传设备，在图1中未画出。本申请的实施例对该移动通信系统中包括的核心网设备、无线接入网设备和终端设备的数量不做限定。
在移动通信系统100中，无线接入网设备120是终端设备通过无线方式接入到该移动通信系统中的接入设备。该无线接入网设备120可以是：基站、演进型基站(evolved node B，eNB)、家庭基站、无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为NR系统中的gNB，或者，还可以是构成基站的组件或一部分设备，如汇聚单元(central unit，CU)、分布式单元(distributed unit，DU)或基带单元(baseband unit，BBU)等。应理解，本申请的实施例中，对无线接入网设备所采用的具体技术和具体设备形态不做限定。在本申请中，无线接入网设备简称网络设备，如果无特殊说明，在本申请中，网络设备均指无线接入网设备。在本申请中，网络设备可以是指网络设备本身，也可以是应用于网络设备中完成无线通信处理功能的芯片。
该移动通信系统100中的终端设备也可以称为终端、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。本申请实施例中的 终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑，还可以是应用于虚拟现实(virtual reality，VR)、增强现实(augmented reality，AR)、工业控制(industrial control)、无人驾驶(self driving)、远程医疗(remote medical)、智能电网(smart grid)、运输安全(transportation safety)、智慧城市(smart city)以及智慧家庭(smart home)等场景中的无线终端。本申请中将前述终端设备及可应用于前述终端设备的芯片统称为终端设备。应理解，本申请实施例对终端设备所采用的具体技术和具体设备形态不做限定。
应理解，本申请实施例中的方式、情况、类别以及实施例的划分仅是为了描述的方便，不应构成特别的限定，各种方式、类别、情况以及实施例中的特征在不矛盾的情况下可以相结合。
还应理解，本申请实施例中的“第一”、“第二”以及“第三”仅为了区分，不应对本申请构成任何限定。例如，本申请实施例中的“第一控制资源集合”，表示下行控制信道的集合。
还应理解，在本申请的各种实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还需要说明的是，本申请实施例中，“预先设定”、“预先配置”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。
还需要说明的是，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。下面将结合附图详细说明本申请提供的技术方案。
为便于理解本申请实施例，下面先对本申请涉及到的几个概念进行简单介绍。
1、无线帧、时间单元和时域符号
网络设备和终端设备用于无线通信的时域资源可以划分为多个无线帧或者时间单元。并且，在本申请实施例中，多个无线帧可以是连续的，也可以是某些相邻的无线帧之间设有预设的间隔，本申请实施例并未特别限定。
在本申请实施例中，1个无线帧可以是包含一个或多个子帧；或者，也可以是一个或多个时隙；或者，也可以是一个或多个符号。
在本申请的实施例中，符号也称为时域符号，可以是正交频分复用(orthogonal frequency division multiplexing，OFDM)符号，也可以是单载波频分多址(single carrier frequency division multiple access，SC-FDMA)符号，其中SC-FDMA又称为带有转换预编码的正交频分复用(orthogonal frequency division multiplexing with transform precoding，OFDM with TP)。
在本申请实施例中，多个时间单元在时域上存在时序关系，且任意两个时间单元对应的时间长度可以相同也可以不同。
2、频带(frequency band)和频带宽度
频带的单位是赫兹(Hz)，是指无线电频谱上位于两个特定的频率界限之间的部分。 对信号而言，频带就是信号包含的最高频率与最低频率这之间的频率范围(考虑频率分量必须大于一定的值)。而对信道而言，频带就是允许传送的信号的最高频率与允许传送的信号的最低频率这之间的频率范围(考虑衰减必须在一定范围内)。
通俗的说，对信道而言，频带就是允许传送的信号的最高频率与允许传送的信号的最低频率这之间的频率范围。若两者差别很大，可以认为频带就等于允许传送的信号的最高频率。
对信号而言，频带就是信号包含的最高频率与最低频率这之间的频率范围。若两者差别很大，可以粗略地认为频带就等于信号的最高频率。
频带宽度简称为“带宽”，有时称必要带宽，是传送模拟信号时的信号最高频率与最低频率之差，单位为Hz，即为保证某种发射信息的速率和质量所需占用的频带宽度容许值。
有效带宽：信号所拥有的频率范围叫做信号的频带宽度。信号的大部分能量往往包含在频率较窄的一段频带中，这就是有效带宽。
3、载波与子载波
载波可以理解是一种工作在预先定义的单一频率的周期性振荡信号，例如载波可以是正弦波，也可以是如周期性脉冲序列的非正弦波。改变载波以便以适合传输的形式表示数据就是我们所说的调制，载波受调制后称为已调信号，它含有调制信号的全波特征。发送设备将数据信号加载到载波信号上，接收设备按照载波的频率来接受数据信号，再将这些信号提取出来就是需要的数据信号。
多载波通信中的子信道称为子载波(subcarrier)，在NR系统中，频域上的基本单位为一个子载波，一个子载波可以是15kHz，通过正交频分复用技术，将串行数据流转变为并行数据流，并使用不同的子载波来承载数据信号。
4、时频资源概述
图2是一例下行时频资源的网格示意图。如图2所示，资源网格上的每个元素称为一个资源元素(resource element，RE)，RE为最小的的物理资源，一个RE包含一个OFDM符号内的一个子载波。
上行时频资源网格与下行类似。NR中下行资源调度的基本时间单位是一个时隙(slot)，一般而言，一个slot在时间上由14个OFDM符号组成。在时域上，NR传输过程中包括时间长度为10ms的帧(frame)，每个帧被分成10个大小相同、长度为1ms的子帧(subframe)，而每个子帧可以包含一个或多个时隙，例如当子载波为15kHz时，根据子载波间隔确定每个子帧包含一个时隙。每个帧由一个系统帧号(system frame number，SFN)来标识，SFN的周期等于1024，因此SFN在1024个帧后自行重复。
网络设备为终端设备传输物理下行共享信道(physical downlink share channel，PDSCH)和物理下行控制信道(physical downlink control channel，PDCCH)。为了正确接收PDSCH，终端设备需要先解调PDCCH，PDCCH携带的下行控制信息(downlink control information，DCI)中包含接收PDSCH所需要的相关信息，例如PDSCH时频资源位置和时频资源的大小，多天线配置信息等。
下面介绍下行控制信道的一些基本概念，包括控制信道单元(control channel element，CCE)，搜索空间(search space)，资源单元组(resource element group，REG)，资源 单元组束(resource element group bundle，REG bundle)，和控制资源集合(control resource set，CORESET)等。
下行控制信道在控制资源集合CORESET中传输，CORESET在频域上包括多个物理资源块(physical resource block，PRB)；在时域上包括1到3个OFDM符号，且可位于时隙内的任意位置。CORESET占用的时频资源大小以及时频位置可根据高层参数半静态配置。
资源单元组(resource-element group，REG)是在时域上占用一个OFDM符号，在频域上占用一个资源块的物理资源单位，即，REG包括频域连续的12个子载波。图3是一例REG资源结构示意图。如图3所示，一个REG可以包括12个RE，在12个RE中，包括3个RE用于映射PDCCH解调参考信号，以及9个RE用于映射DCI的RE。其中，用于映射PDCCH解调参考信号的RE均匀分布在REG内，且位于REG内编号为1、5、9的子载波上。
控制信道单元(control channel element，CCE)是构成PDCCH的基本单位，可以理解，一个CCE可以用于映射PDCCH的6个REG。图4是一例PDCCH的CCE集合示意图，如图4所示，在CORESET中的每个CCE都会有一个对应的索引号。其中，CCE的索引号是逻辑上的概念，每个CCE索引号会与其映射的6个REG的索引号有对应关系。
应理解，一个给定的PDCCH可由1，2，4，8和16个CCE构成，其具体取值由DCI载荷大小(DCI payload size)和所需的编码速率决定，构成PDCCH的CCE数量也被称为聚合等级(aggregation level,AL)。网络设备可根据实际传输的无线信道状态，对PDCCH的聚合等级AL进行调整，实现链路自适应传输。一个CCE对应了物理资源上6个REG，一个CCE映射到的实际物理资源包括72个RE，其中18个RE用于DMRS，54个RE用于DCI信息传输。
资源单元组束(REG bundle)为时域和频域连续的多个REG，构成REG bundle的REG的数量包括2个、3个和6个，并且在一个REG bundle内映射的PDCCH采用相同的预编码(precoder)，即终端设备可利用REG bundle内的解调参考信号进行时域和/或频域联合信道估计。REG bundle在时域和频域包括的REG的数量与CORESET时域符号数量和REG bundle大小的配置有关，其具体取值可以如表1所列出的REG bundle时域/频域结构示例，图5是不同的CORESET时域符号下的REG bundle结构图。
表1
Figure PCTCN2019116442-appb-000001
以上结合附图介绍了与时频资源相关的基本概念，由以上内容可知，搜索空间(search space)是某个聚合等级下候选PDCCH(PDCCH candidate)的集合。由于网络设备实际发送的PDCCH的聚合等级随时间可变，而且由于没有相关信令告知终端设备网络设备实际 发送的PDCCH的聚合等级，因此终端设备需在不同聚合等级下盲检PDCCH，其中，待盲检的PDCCH称为候选PDCCH。终端设备会在搜索空间内对由CCE构成的所有候选PDCCH进行译码，如果循环冗余码校验(cyclic redundancy check，CRC)通过，则认为所译码的PDCCH的内容对所述终端设备有效，并处理译码后的相关信息。
为了降低终端设备盲检的复杂度，需要限制盲检测的CCE的集合。具体的，候选PDCCH的起始CCE索引号需要可整除此候选PDCCH的聚合等级。如图4所示，聚合等级2的候选PDCCH只能从可被2整除的CCE序号开始，同样的原则适用于其他聚合等级的搜索空间。此外，搜索空间所在的CCE集合，可进一步根据搜索空间集合配置信息中的高层参数和预定义的规则确定。
应理解，在本申请中，该搜索空间集合配置信息可以承载在高层信令中，或者承载在物理层信令中。在本申请的实施例中，高层信令可以是无线资源控制(radio resource control，RRC)信令，也可以是媒体访问控制(media access control，MAC)层信令；物理层信令可以是下行控制信息DCI。本申请实施例对配置方法不做限定。
应理解，在NR中，终端设备可以处于不同的状态，其中一种状态为无线资源控制连接状态(RRC_CONNECTED)。在RRC_CONNECTED状态下，UE已经建立了RRC上下文(context)，即终端设备已经建立了RRC连接，即终端设备与无线接入网设备之间通信所必需的参数对于两者是已知的，RRC_CONNECTED状态主要用于终端设备进行数据传输。
一般而言，基于包的数据流通常是突发性的，在一段时间内有数据传输，但在接下来的一段较长时间内没有数据传输。因此NR中可以为终端设备配置非连续接收(discontinuous reception，DRX)处理流程，在没有数据传输的时候，可以通过使终端设备停止检测PDCCH来降低功耗，从而提升电池使用时间。
图6是一例CORESET和搜索空间时域位置的关系示意图。如图6所示，在DRX中，网络设备可为处于RRC_CONNECTED状态的终端设备配置非连续接收周期(DRX cycle)，DRX cycle中包含一个“on duration”的时间区域，该时间区域可以为DRX定时器drx-onDurationTimer的时间长度，或称为持续时间定时器时长。图7是一例非连续接收周期的示意图，如图7所示，在“on duration”的时间段内，终端设备可以检测PDCCH；如果终端设备在“on duration”的时间段内没有检测到PDCCH，在DRX cycle的其余时间段内终端设备可以关闭接收电路进入睡眠状态，从而降低终端设备的功耗。
在NR中，终端设备会工作在更大的射频与基带带宽，而在一个DRX cycle中，终端设备需要首先从睡眠状态唤醒，开启射频和基带电路，获取时频同步，然后在“on duration”的时间段内检测PDCCH，这些过程需要不少能耗。而一般而言，数据传输在时间上往往具有突发性和稀疏性，如果在“on duration”的时间段内网络设备对终端设备没有任何数据调度的话，那么对于终端设备而言就产生了不必要的能量消耗。所以为了节省功耗，在NR中引入唤醒信号(wake up signal，WUS)，并将WUS与RRC_CONNECTED状态下的DRX机制相结合的方法。
应理解，本申请的方法可以适用于能够使用DRX机制的通信系统。下面对本申请的的DRX机制进行介绍。
DRX可让终端设备周期性的在某些时候进入睡眠状态(sleep mode or sleep state)， 不去监听PDCCH，而需要监听的时候，则从睡眠状态中唤醒(wake up)，这样就能够使终端设备达到省电的目的。
图8示出了一个典型的DRX周期。如图8所示，在本申请中，一个DRX周期可以包括激活时段(active time)和睡眠时段。
该激活时段也可以称为运行时段(running time)，即终端设备的各DRX定时器的运行时间，比如图8中激活时段可包括持续时间定时器运行时段、非激活定时器运行时段和重传定时器运行时段。终端设备可以在激活时段与网络设备进行通信，检测下行控制信道。如图8所示，在激活时段，终端设备监控下行PDCCH时隙，在这段时间里，终端设备是处于唤醒状态的。睡眠时段也可以称为DRX机会(opportunity for DRX)时段。终端设备可以在睡眠时段不进行数据传输。如图8所示，在opportunity for DRX时段，终端设备为了省电，进入了睡眠而不监控PDCCH时隙的时间。从图8中可以看到，用于DRX睡眠的时间越长，终端设备的功率消耗就越低，但相应的，业务传输的时延也会随着增加。
在DRX机制中，终端设备可以在激活期接收下行数据和上行授权。并且，终端设备可以在空闲模式下根据寻呼(paging)周期进行DRX的循环。或者，终端设备可以在无线资源控制(radio resource control，RRC)连接状态下采用多种定时器配合运作来保证下行数据与上行授权的接收。随后，对上述定时器进行详细说明。
大数据量的通信势必造成耗电量的急剧增加，从而使得电池的供应不足或造成因为耗电量加大造成的散热量加大而导致系统运转故障。而DRX功能的利用大大降低了耗电量。
在本申请中，DRX功能控制实体可以位于协议栈的MAC层，其主要功能是控制向物理层发送指令，通知物理层在特定的时间监视PDCCH，其余时间不会开启接收天线，处于睡眠状态。
作为示例而非限定，在本申请中，DRX周期可以包括短DRX周期和长DRX周期。
具体地说，如上所述，一个DRX周期可以等于激活时段和睡眠时间的总和。通信系统可以根据不同的业务场景，给终端设备分别配置短DRX周期(short DRX cycle)或长DRX周期(long DRX cycle)。比如在进行语音业务时，语音编解码器通常每20毫秒(ms)发送1个语音数据包，此情况下，可以配置长度为20ms的短DRX周期，而在语音通话期间较长的静默期，可以配置长DRX周期。
即，如果在终端设备自身配置中包含有短DRX周期及短DRX周期定时器，则按照短DRX周期进行运行，在短DRX周期定时器超时后将会进入长DRX周期运行状态。
并且，在激活期之后或短DRX定时器超时后进入长DRX周期运行阶段。
下面，对DRX机制中使用的定时器进行示例性说明。
1.持续时间定时器(drx-on duration timer或drx-on duration timer)
该drx-on duration timer用于确定“on duration”的时长，终端设备在drx-on duration timer运行期间或者说，在drx-on duration timer超时之前，终端处于“on duration”时段内，终端设备可以检测PDCCH。
2.DRX非激活定时器(drx-inactivity timer或drx-inactivity timer)
具体地说，设时隙n是on duration时段的最后一个时隙，此时网络侧恰好有一个较大字节的数据需要发给终端设备，这些数据没法在时隙n全部发送完。如果依照drx-on duration timer执行，则终端设备将在时隙n+1进入DRX睡眠状态，不会再去监听PDCCH， 也不能接收来自网侧的任何下行PDSCH数据。网侧也只能等到DRX周期结束，并在下1个on duration时段到来时，继续向终端设备发送没有传完的数据，这会明显增加全部业务的处理时延。为了防止这类情况的出现，DRX机制中增加了drx-inactivity timer。如果drx-inactivity timer正在运行，则即使本来配置的on duration timer超时(即，on duration时段结束)，终端设备依然需要继续监听下行PDCCH子帧，直到drx-inactivity timer超时。增加了drx-inactivity timer机制以后，明显会减少数据的处理时延。
3.DRX重传定时器(DRX retransmission timer DL或drx-retransmission timer DL)
在DRX机制中，DRX retransmission timer含义是：终端设备在收到期望的下行重传数据之前，需要等待的最少时隙个数。DRX retransmission timer DL是指在HARQ RTT timer超时后，终端设备为了接收没有传输成功而需要重传的数据，监听PDCCH的时间长度。
在本申请中，激活时段可以包括上述on duration timer、drx-inactivity timer和DRX retransmission timer中的至少一个定时器运行期间对应的时段。
应理解，以上列举的定时器仅为示例性说明，本申请并未限定于此。
在RRC连接状态下，采用的是定时器与DRX结合的工作方式，且网络设备也会保持与终端设备保持相同的DRX工作方式，并实时了解终端设备是处于激活时段(active time)还是睡眠时段，因此保证在激活时段传递数据，而在睡眠时段不会进行数据传输。
DRX cycle的选择需要考虑功耗与时延之间的平衡。从一个方面讲，长的DRX周期有利于降低功耗，但也意味着对网络设备调度器的限制，不利于时延。从另一个方面讲，当有新的数据传输时，一个更短的DRX周期有利于更快的响应，减少时延。为了满足上述需求，每个终端设备可以配置两个DRX cycle参数：drx-long cycle(范围为10～10240ms)和drx-short cycle(范围为2～640ms)，一个为长DRX周期(long DRX cycle)，另一个为短DRX周期(short DRX cycle)。
在RRC_CONNECTED状态下，对于配置了DRX机制的终端设备，终端设备可以根据下面的公式得到“on duration”的起始位置(即，起始时间位置)所在的SFN以及子帧在帧内的编号subframe number：
[(SFN×10)+subframe number]mod V＝Y
V为终端设备所使用DRX的周期，如果终端设备使用长DRX周期，那么V的值为drx-long cycle；Y的值为参数drx-start offset，可通过高层信令配置，单位为1ms。如果终端设备使用短DRX周期，那么V的值为drx-short cycle；Y的值为(drx-short cycle)modulo(drx-short cycle)，单位同样为1ms。
应理解，在本申请中，“on duration”的起始位置也可以理解为DRX cycle的起始位置。
同时，由于NR的调度单位为时隙(slot)，而对于大于15kHz的子载波，一个子帧中可包含多个slot(比如对于60kHz的子载波间隔，一个子帧中可包含4个slot)，因此高层信令为终端设备配置参数drx-slot offset，终端设备通过该参数进一步确定“on duration”(也是DRX cycle)的起始时间位置所在的slot，该slot位于所述子帧内。
应理解，在本专利中，“on duration”的起始位置也可以理解为DRX cycle的起始位置。
图9是一例唤醒信号与RRC_CONNECTED状态下的DRX机制相结合的示意图。对于支持WUS的终端设备，对于每一个DRX cycle的“on duration”，在其起始位置之前有一个“WUS occasion”(WUS时刻，可理解为WUS所在的subframe或slot)与之对应。网络 设备可在“WUS occasion”上为终端设备以不连续发送(discontinuous transmission，DTX)形式发送WUS，即网络设备根据调度数据的需求决定是否在“WUS occasion”上发送WUS，而终端设备需要在“WUS occasion”上通过检测WUS来判断网络设备是否发送WUS。终端设备处于“睡眠”时可以极低功耗的状态(比如仅开启部分modem的功能或使用一个简单的接收电路)来检测和解调WUS。结合图9的示意图，当终端设备在“WUS occasion”上没有检测到WUS或检测到的WUS指示终端设备在对应“on duration”时间段内没有数据调度时，终端设备可以直接进入睡眠状态，就不用在“on duration”时间段内检测PDCCH。而如果终端设备在“WUS occasion”上检测到WUS或检测到的WUS指示终端设备在对应“on duration”时间段内有数据调度时，那么终端设备就会被从睡眠状态“唤醒(wake up)”，即此时终端设备可以按照前面所述的DRX机制流程启动定时器，检测PDCCH，此时终端设备需要足够的时间来开启全部modem的功能，从而使终端设备能够在DRX cycle内检测PDCCH，接收数据信道；因此“WUS occasion”与“on duration”起始时间位置之间存在一段时间间距，可以称之为“WUS偏移”(WUS offset)，也可称为间隔值(gap value)，一般用参数T来表示这段时间间距，该参数可由高层信令配置(数值范围为几毫秒到上百毫秒)，网络设备可以根据终端设备上报的能力来确定该参数的值。
在NR中，对于WUS的设计，一种可能的方案是针对WUS引入一种新的物理信道或信号，比如在LTE的窄带物联网(narrow band internet of things，NB-IoT)技术中，为WUS设计了独立的序列，例如基于Zadoff-Chu(ZC)的序列，序列长度为132，也可以是通过对信源比特或者信息比特进行信道编码后得到，比如使用Reed-Muller码或者Kerdock码。应理解，本申请对此并不限定。在NR中，对于WUS引入新的物理信道或信号会增加网络侧资源的额外消耗。于此同时，WUS信号是可能在NR R16版本中引入，因此对于一些只支持NR R15版本的终端设备，在接收PDSCH时可能还需要针对新引入的WUS进行速率匹配(rate matching)，不利于网络设备为终端设备调度数据资源的灵活性。
因此，本申请提出一种唤醒信号的传输方法，对于WUS，通过复用NR中的已有的信道或者信号的资源，从而提高网络侧资源的使用效率。
图10是本申请实施例提供的一例接收信号的方法1000的示意性流程图。该方法1000可以应用于上述无线通信系统100的终端设备130或终端设备140。应理解，在本申请的实施例中，以终端装置和网络设备作为执行主体为例进行说明。作为示例而非限定，执行主体也可以是应用于终端设备的芯片和应用于网络设备的芯片。如图10所示，该方法1000包括以下内容。
S1010，终端设备确定至少一个时频资源。相应地，网络设备也确定该至少一个时频资源。
具体地，终端设备可以根据至少一个第一索引号确定该至少一个时频资源。该至少一个第一索引号可以是第一控制资源集合(control resource set，CORESET)的控制信道单元(control channel element，CCE)的索引号。该至少一个第一索引号可以承载在高层信令中，也可以承载在物理层信令中。在本申请的实施例中，高层信令可以是无线资源控制RRC信令，也可以是媒体访问控制MAC层信令；物理层信令可以是下行控制信息DCI。
S1020，网络设备在该至少一个时频资源上，发送第一信号。相应地，终端设备在该 至少一个时频资源上，检测第一信号。该至少一个时频资源还用于承载下行控制信道。
应理解，本申请中第一信号可以是唤醒信号(WUS)或者休眠信号(go to sleep，GTS)，也可以是“节能信号”(power saving signal)，或者其他具有类似功用的信号。WUS用于唤醒终端设备，使得终端设备从某个时间位置开始检测PDCCH。休眠信号用于指示终端设备进入休眠模式，即低功耗模式，终端设备可在检测到下一个休眠信号之前的时间段内停止检测PDCCH，节能信号可以为唤醒信号和休眠信号的统称，或者同时具有唤醒信号和休眠信号的功能。
可选地，该第一信号是根据第一序列生成的。具体地，第一信号可以根据某一长度的ZC序列生成，或者可以根据某一长度的Gold序列生成，或者根据某一长度的伪随机序列生成。
可选地，第一信号还可以通过对信源比特或者信息比特进行信道编码后得到，比如通过Reed-Muller编码或者Kerdock编码，或者称之为短传输格式编码(transport format combination indicator，TFCI)。应理解，本申请对此并不限定。
可选地，第一信号还可以替换成第一信道，如下行控制信道。
可选的，第一信号可以为参考信号，比如为解调参考信号DMRS，或者CSI参考信号CSI-RS，或者跟踪参考信号TRS。
这里信源比特可以没有经过信道编码处理，第一信号可以携带一些信源比特或者信息比特，可用于指示是否唤醒一个终端设备或者一组终端设备。
可选地，该第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成。
例如，WUS预定义由6个时频资源单元组成，即与REG具有相同的时频结构。每个时频资源单元在时域上为一个OFDM符号，在频域上为一个资源块。
在一个时频资源单元所包括的RE中，其中有2、3或4个RE可用于映射该第一信号的解调参考信号，其余的RE可用于映射该第一信号的调制符号数据。
但注意的是，WUS的时频资源单元不一定等价于REG，比如时频资源单元内所包含的解调参考信号的数量不一定与REG内所包含的解调参考信号的数量相同。
可选地，该第一信号还包括用于解调该第一信号的参考信号，该方法还包括：根据该第一标识解调/解扰该参考信号，该第一标识是该唤醒信号或休眠信号的标识。
在一种可能的实现方式中，该第一标识是通过高层信令配置的。
S1030，终端设备根据对该第一信号的检测结果，确定是否从第一时间位置开始检测第一信道。
这里，第一时间位置可以为对应DRX cycle的起始位置，或者为对应DRX cycle的“on duration”的起始位置，或者说第一时间位置为对应DRX cycle或“on duration”的起始位置所在的时隙或子帧。终端设备在该起始时隙或子帧(即第一时间位置)上可以启动第一定时器(该第一定时器可以为定时器drx-onDurationTimer)，或者可以开始检测第一信道。从更一般的概念来说，该第一时间位置可以为终端设备DRX cycle的激活时段(active time)的起始位置，所述DRX cycle激活时间包括了“on duration”的时间长度或第一定时器的时间长度。
本申请中，第一信道可以是PDCCH，还可以是数据信道PDSCH，本申请实施例对此 不作限定。此外，上述第一信道也可以替换为用于信道状态信息(channel state information，CSI)测量或时频跟踪/同步的参考信号或者其他的信号。
例如，当第一信号为WUS时，该WUS用于唤醒终端设备，检测出WUS的终端设备从第一时间位置开始检测PDCCH。具体地，结合图9的示意图，终端设备在WUS时刻接收唤醒信号，并在一段时间后，阴影部分的时段检测PDCCH。
下面将具体对S1010和S1020进行举例说明。为了便于描述，在后续实施例的描述中，以WUS为例进行详细的介绍，本申请包括但不限于此。还应理解的是，本申请的各个实施例可以相互结合。
示例一：
图11是本申请实施例提供的一例WUS资源与CORESET中CCE映射关系示意图。
在S1010，终端设备可以根据至少一个第一索引号，确定该至少一个时频资源，该至少一个第一索引号中的每个第一索引号为第一控制资源集合(CORESET)的控制信道单元CCE的索引号。相应地，网络设备也可以根据该至少一个第一索引号，确定该至少一个时频资源。例如，终端设备可以根据高层信令，确定该至少一个第一索引号和该第一控制资源集合。这里，该至少一个第一索引号由所述高层信令直接携带。例如，终端设备可以通过获取高层信令中携带的与WUS相关联的CORESET索引号或ID号，确定CORESET，再根据高层信令中携带的CCE索引号，确定该CORESET中的CCE，从而确定该CCE所映射的REG所在资源。
作为示例而非限定，可以通过高层信令为终端设备配置WUS的相关参数，例如，可以包括以下几部分相关参数：
(1)WUS所关联的CORESET索引号或ID号，或者也可以配置WUS所关联CORESET的相关参数，包括CORESET的频域位置、时域长度、CCE到REG的映射类型、REG bundle大小值L等。
应理解，这里终端设备和网络设备可以直接根据下行控制资源集合的信息中包括的CORESET索引号或ID号确定下行控制资源集合；或者，终端设备和网络设备可以根据CORESET的频域位置、时域长度、CCE到REG的映射类型、REG bundle大小值L等参数信息，确定出CORESET索引号，从而确定下行控制资源集合。
(2)WUS在时隙内的起始OFDM符号位置。
应理解，通过配置WUS在一个时隙内的起始OFDM的符号位置，可以更准确的确定WUS的时频资源位置。
(3)WUS所关联CCE索引参数j，即WUS在该CORESET内的资源为：CORESET内索引为j的CCE所映射的REG所在的资源。
应理解，这里WUS所关联的CCE索引参数j即为第一索引号。
可选地，WUS所关联的备选CCE可以是预先配置的，比如可以预配置为CCE索引0。或者可以是网络设备向终端设备通过动态信令(比如DCI)指示的，或者所述备选CCE是根据以上(1)和(2)中的至少一个参数确定的。本申请实施例对确定WUS关联的CCE索引j的方式不作限定。
可选的，可配置多个WUS所关联CCE索引参数j，对应不同的第一索引号。
(4)WUS的编号值n WUS_ID，不同WUS的编号值是不一样的。
应理解，为了充分利用CORESET的资源，不同的WUS可能会关联到相同CORESET内同一个CCE索引号上，即共享同样的CORESET内的时频资源。因此终端设备检测WUS时，可能会在相同的位置上检测到其它WUS从而产生虚警。
可选地，为了避免终端设备因为检测到其他WUS产生虚警，网络设备在生成WUS的过程中，可以根据该WUS的标识，例如WUS的编号n WUS_ID，对检测到的WUS进行加扰。相应地，该终端设备接收到WUS信号，可以根据WUS的标识，例如WUS的编号n WUS_ID，对检测到的WUS进行解扰。
或者，由于WUS是经过调制的符号数据，则可以将用于解调WUS的DMRS，使用WUS的编号值n WUS_ID来进行加扰，避免产生虚警。即WUS的DMRS序列的初始化参数中包含了WUS的编号值n WUS_ID。例如，考虑到CORESET内最多有135个CCE，WUS的编号值可以为8比特，WUS的DMRS的初始化公式可以写为：
Figure PCTCN2019116442-appb-000002
其中，
Figure PCTCN2019116442-appb-000003
为小区的ID号，l为WUS所在时隙的OFDM符号编号，
Figure PCTCN2019116442-appb-000004
为WUS所在的时隙的编号。
在本申请中，该第一标识可以为WUS的标识，或者为WUS的编号n WUS_ID。
应理解，通过上述方法，能够针对不同的终端设备，准确地向目的终端设备发送唤醒信号，只有对应的终端设备能获取该唤醒信号的信息，从而避免其他终端设备产生虚警。
针对上述的WUS，终端设备根据下行控制资源集合的信息确定CORESET索引号或ID号，还需要进一步将传输WUS的时频资源确定到CORESET里面的时频资源。
可选的，终端设备确定至少一个时频资源，包括：根据控制信道单元CCE到资源单元组REG的映射方式，确定该至少一个时频资源，该映射方式为交织映射或非交织映射。
可选的，如果组成WUS的时频资源单元与REG具有相同的时频结构，即每个时频资源单元在时域上为一个OFDM符号，在频域上为一个物理资源块(PRB)时，终端设备可根据控制信道单元CCE到资源单元组REG的映射方式(包括交织映射或非交织映射)，确定WUS在CORESET里面的时频资源。从另一方面来说，WUS的时频资源即为至少一个第一索引号所对应CCE映射到的CORESET内的REG资源。因此可根据CCE、REG bundle、REG之间的映射关系确定WUS在CORESET内的时频位置。
下面介绍下行控制信道在CORESET的资源映射方式，即CCE、REG bundle、REG与CORESET的关系。
在资源映射前，网络设备需在终端设备的搜索空间内确定发送PDCCH的CCE索引。随后根据CCE索引与REG bundle索引之间的对应关系确定对应的物理资源。根据CCE索引与REG bundle索引之间的不同对应，资源映射又进一步分为交织式映射(interleaved mapping)和非交织式映射(non-interleaved mapping)，不同的映射方式可通过高层信令配置。交织映射下，可将CCE映射后的REG分散在整个CORESET内，进而可获得频率分集增益。而在非交织式映射下，可将CCE映射后的REG聚集在CORESET内的部分时频资源。
在介绍CCE索引和REG bundle索引的对应关系前，需定义REG bundle索引。在本申请实施例的描述中，将CCE索引记作j，将REG bundle索引记作u。具体的，REG bundle u对应的REG索引号为{uB，…，uB+B-1}，其中，REG索引为CORESET内以时域优先 的顺序进行排序的索引号，B为REG bundle内包括的REG的数量。
图12是本申请实施例提供的一例CORESET内REG bundle索引与REG索引之间的关系示意图。如图12所示，CORESET时域上为2个OFDM符号，频域上为48个PRB，当B＝2时，REG bundle 0对应的REG索引号为{0,1}，REG bundle8对应的REG索引号为{16,17}，REG bundle16对应的REG索引号为{32,33}。
CCE索引与REG bundle索引的对应关系由映射函数f(x)表示，其中，CCE j对应的REG bundle索引为{f(6j/B)，f(6j/B+1)，…，f(6j/B+6/B-1)}，f(x)的映射函数如表2所示。
表2
Figure PCTCN2019116442-appb-000005
其中，R由高层信令配置的参数，取值集合为{2,3,6}；n shift为偏移参数，用于实现小区间干扰随机化；
Figure PCTCN2019116442-appb-000006
表示CORESET内包括的REG的总数。这样终端设备可以根据检测PDCCH的CCE索引号得到组成PDCCH的REG资源在CORESET中的位置。
根据上述的步骤，先根据WUS的配置信息确定WUS所关联的CORESET索引号或ID号，再根据配置的第一索引号确定CCE索引号j，再根据CCE索引j确定REG bundle索引u，最后根据REG bundle索引确定映射的时频资源，即确定该至少一个时频资源。
网络设备和终端设备可以根据上述步骤中配置的对应的下行控制资源集合的信息所包括的至少一个参数确定WUS所在的资源。确定方法为：WUS所关联的CCE索引参数j，CCE j对应的REG bundle索引为{f(6j/B)，f(6j/B+1),…,f(6j/B+6/B-1)}，B为REG bundle的大小，函数f(x)的表达式根据CCE到REG的映射类型确定，见前面的表2。而对于其中每一个REG bundle索引u，对应的REG索引号为{uB,…,uB+B-1}。这些REG的资源即为WUS所在的资源，网络设备和终端设备可在这些资源上分别发送和检测WUS。
通过上述实施例提供的方案，WUS可以以类似REG bundle的方式进行交织映射，从而获取频率分集增益，提高信道估计性能。同时，当网络设备不发送WUS时，对应的WUS资源(至少一个时频资源)上可以发送下行控制信道，实现WUS和下行控制信道的复用，提高资源使用效率。
示例二：
在S1010，终端设备可以根据至少一个第一索引号，确定至少一个时频资源，其中，所述第一索引号为搜索空间集合中候选下行控制信道的CCE索引号，所述搜索空间集合中候选下行控制信道的CCE索引号为所述第一控制资源集合的CCE索引号。
在一种可能的实现方式中，所述第一索引号为所述搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号，其中0≤i≤L-1。即，对于聚 合等级为L的每个候选下行控制信道，一共有L个CCE，其编号为0到L-1。
注意的是，这里CCE编号i与CCE索引号j是有区别的，这里CCE索引号j是指CCE在CORESET中的索引号，而CCE编号i时指CCE在候选下行控制信道中的编号。本申请下面涉及CCE编号与CCE索引号的区别与这里的说明均保持一致。
例如，终端设备可以根据高层信令，确定聚合等级L、候选下行控制信道的编号m、CCE的编号i，其中，所述聚合等级L、候选下行控制信道的编号m、CCE的编号i由所述高层信令直接携带；或者根据预定义的值，确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i。例如，终端设备可以通过获取高层信令中携带的L、m和i的值，确定该CCE所映射的REG所在资源。
应理解，PDCCH可以支持多种聚合等级大小，而网络设备向终端设备发送的PDCCH的聚合等级对于终端设备而言无法提前获得，因此终端设备需对PDCCH进行盲检测。根据前面描述的搜索空间的定义，终端设备在有限的CCE位置上检测PDCCH，从而避免了盲检测复杂度的增加。
在NR中，为了更好地控制盲检测的复杂度，进一步提高了搜索空间配置的灵活性，即聚合等级，聚合等级对应的候选控制信道的数量，以及搜索空间在时域上的检测周期都可通过高层参数进行配置，基于这些配置信息可灵活控制盲检测的复杂度。
在NR中，网络设备可为终端设备配置一个或多个搜索空间集合，其中，每个搜索空间集合包括一个或多个聚合等级的搜索空间。搜索空间集合的配置信息如表3所示。
表3控制信道资源映射参数
Figure PCTCN2019116442-appb-000007
其中，搜索空间集合的时域配置信息包括：检测周期，时隙偏移，时隙数量，符号位置和控制资源集合(CORESET)索引。为了方便理解，以图6为例，其中，检测周期为10个slot，时隙偏移为3个slot，时隙数量为2个slot，控制资源集合索引对应一个占用2个OFDM符号的CORESET，符号位置为slot内OFDM符号0和OFDM符号7。在上述 例子中，终端设备每个10-slot周期内的slot 3和slot 4内的符号0和符号7，检测CORESET，且CORESET在时域上占用2个OFDM符号。
作为示例而非限定，可以通过高层信令为终端设备配置WUS的相关参数，例如，可以包括以下几部分相关参数：
(1)WUS所关联的搜索空间集合(search space set)索引号或ID号，也可以为WUS所关联搜索空间集合的相关参数，如表3中所列举的参数，可以包括该搜索空间集合所关联的CORESET、聚合等级大小、候选控制信道数量、符号位置等。
应理解，这里终端设备和网络设备可以直接根据搜索空间集合的信息中包括的CORESET索引号或ID号确定下行控制资源集合，即第一控制资源集合；网络设备
(2)配置参数L，m以及i。所述参数L，m，i的含义为：所述第一索引号为所述搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号。
可选的，参数L可以预定义为1，或者为搜索空间集合中的候选控制信道数量不为0的最小的聚合等级值。
可选的，参数m可以预定义为0。
可选的，参数i可以预定义为0。
可选的，可配置多个参数L，m以及i的值，用于确定多个第一索引号。
(3)如果搜索空间集合类型为UE专用搜索空间，还可能需要配置参数n RNTI。
(4)WUS的编号值n WUS_ID，不同WUS的编号值是不一样的。
应理解，终端设备检测WUS时，可能会在相同的位置上检测到其它WUS从而产生虚警。为了避免终端设备因为检测到其他WUS产生虚警，网络设备在生成WUS的过程中，可以根据该WUS的标识，例如WUS的编号n WUS_ID，对检测到的WUS进行加扰。相应地，该终端设备接收到WUS信号，可以根据该WUS的标识，例如WUS的编号n WUS_ID，对检测到的WUS进行解扰。具体地可以参见上述方法1100中的相关描述，为了简洁，此处不再赘述。
NR中每个候选PDCCH在CORESET内的CCE索引根据给定的搜索空间函数确定。具体的，根据表3中的控制资源集合索引参数，确定对于相互关联的控制资源集合p以及搜索空间集合s，在时隙
Figure PCTCN2019116442-appb-000008
聚合等级为L、编号为
Figure PCTCN2019116442-appb-000009
(其中
Figure PCTCN2019116442-appb-000010
即为前面所述的m值)的候选控制信道的CCE索引由下式给出：
Figure PCTCN2019116442-appb-000011
上述公式(2)中，对公共搜索空间，
Figure PCTCN2019116442-appb-000012
对于终端设备的专用搜索空间，
Figure PCTCN2019116442-appb-000013
Y p,-1＝n RNTI≠0，D＝65537；
当p mod 3＝0，A 0＝39827；
当p mod 3＝1，A 1＝39829，且当p mod 3＝2，A 2＝39829；
N CCE,p为控制资源集合p中包括的CCE的总数，且CCE的编号从0到N CCE,p-1。
若未配置跨载波指示，则n CI＝0，反之，n CI为配置的载波指示参数，以保证调度不同载波的候选PDCCH尽可能占用不重叠的CCE。
Figure PCTCN2019116442-appb-000014
且
Figure PCTCN2019116442-appb-000015
为配置的在聚合等级为L，服务小区为n CI，且搜索空间集合为s的候选控制信道的数量，可通过表3中的候选控制信道数量参数确定；
对于公共搜索空间，
Figure PCTCN2019116442-appb-000016
对于终端设备的专用搜索空间，
Figure PCTCN2019116442-appb-000017
为控制信道资源集合p中，搜索空间集合为s内，聚合等级为L下的所有n CI取值范围内的最大值。
同时在公式(2)中，i即为候选下行控制信道的CCE的编号。
图13是聚合等级AL＝2的候选PDCCH的CCE索引号。假设CORESET中一共有24个CCE，对应聚合等级AL＝2的搜索空间内候选PDCCH的数量为6，那么每个候选PDCCH的CCE索引号可以如图13所示。即终端设备可以在这6个候选PDCCH的CCE所映射的REG上检测PDCCH。
综上所述，网络设备和终端设备可以根据上述步骤中配置的参数确定WUS所在的资源。公式中参数L，m以及i的值可根据高层信令为终端设备配置WUS的相关参数得到，然后根据公式2得到第一索引号j(即对应的CCE索引号)。
图14是通过参数L，m，i确定WUS所关联的CCE索引号的示意图。假设搜索空间集合所关联的CORESET中一共有24个CCE，对应聚合等级AL＝4的搜索空间内候选PDCCH的数量为2，每个候选PDCCH的CCE索引号可以如图14所示。
如果聚合等级L的值配置为4，那么WUS所关联的CCE索引为{4,5,6,7,16,17,18,19}中的一个，为对应2个候选PDCCH的CCE中的一个。
再通过m值进一步确定所关联的CCE索引所属的候选PDCCH，即如果m＝0，那么WUS所关联CCE索引为{4,5,6,7}中的一个，为第一个候选PDCCH的CCE；如果m＝1，那么WUS所关联CCE索引为{16,17,18,19}中的一个，为第二个候选PDCCH的CCE。
最后通过i的值最终确定WUS所关联的CCE索引，比如当m＝0，i＝2时，WUS所关联CCE索引号j＝6。
综上所述，结合公式(2)，通过配置的参数L，m以及i可以确定出用于传输WUS的CCE的索引号j。当确定出WUS所关联的CCE索引参数j后，其余的方法就可以参照示例一中的过程，再继续根据CCE的索引号j确定REG bundle的索引号u，再确定REG。
WUS在时隙中的时域位置可直接根据搜索空间集合在时隙中的起始位置确定，即通过表3中的符号位置配置参数确定，比如可以为该参数配置的第一个起始符号位置。
可选的，WUS在时隙中的时域位置还可以根据高层信令配置，比如通过位图(bitmap)的方式，每一个比特代表时隙中的一个OFDM符号，例如终端设备可通过比特值为“1”的比特确定起始符号位置。本申请对搜索空间集合在时隙中的起始位置的配置并不限定。
通过上述实施例提供的方案，WUS可以以类似REG bundle的方式进行交织映射，从而获取频率分集增益，提高信道估计性能。同时，当网络设备不发送WUS时，对应的WUS资源(至少一个时频资源)上可以发送下行控制信道，实现WUS和下行控制信道的复用，提高资源使用效率。
示例三：
在S1010，终端设备确定多个候选时频资源；相应地，网络设备也可以确定多个候选时频资源。
在一种可能的实现方式中，终端设备可能在CORESET内，有多个候选资源，需要在多个候选资源上检测WUS，每个候选资源与CORESET内一个CCE索引相关联。
具体地，终端设备可以根据高层信令，确定至少一个第一索引号和第一控制资源集合， 其中，所述至少一个第一索引号由所述高层信令直接携带。
在一种可能的实现方式中，所述至少一个第一索引号由搜索空间集合中至少一个聚合等级的M个候选下行控制信道的全部CCE的索引号组成，M为不小于1的整数。终端设备可以根据高层信令中携带的所述至少一个聚合等级L和所述每个聚合等级的至少一个候选下行控制信道的编号m，确定至少一个时频资源。
例如，对于聚合等级为L的M个候选下行控制信道，所述每个候选下行控制信道的编号为m，且m不小于m L且不大于m L+M-1，其中，所述M与m L由高层信令直接携带或预定义。而i的值可以从0取到L-1。终端设备可以根据包括多个候选资源的集合，以及该集合中每个参数对应的聚合等级L、m的值，确定该CCE所映射的REG所在资源。
其中，M应不大于聚合等级为L的候选下行控制信道的数量。
又例如，对于聚合等级为L的M个候选下行控制信道，所述每个候选下行控制信道的编号可以由高层信令单独配置。
在此情况下，作为示例而非限定，可以通过高层信令为终端设备配置WUS的相关参数，例如，可以包括以下几部分相关参数：
(1)WUS所关联的搜索空间集合索引号或ID号，也可以为WUS所关联搜索空间集合的相关参数，例如前述表3中列举的参数，包括该搜索空间集合所关联的CORESET、聚合等级L的大小、候选控制信道数量、符号位置等参数。
(2)WUS的候选资源参数
Figure PCTCN2019116442-appb-000018
集合，以及所述集合中每个参数
Figure PCTCN2019116442-appb-000019
所对应的L i值。举例说明，比如
Figure PCTCN2019116442-appb-000020
其中
Figure PCTCN2019116442-appb-000021
对应L 1＝1，
Figure PCTCN2019116442-appb-000022
对应L 2＝2。
可选的，参数L i可以预定义为1，或者为搜索空间集合中的候选控制信道数量不为0的最小的聚合等级值。
(3)WUS的候选资源参数集合中每个参数
Figure PCTCN2019116442-appb-000023
所对应的
Figure PCTCN2019116442-appb-000024
值，可以由高层信令配置，也可以由系统预定义。
例如，参数
Figure PCTCN2019116442-appb-000025
和对应的
Figure PCTCN2019116442-appb-000026
值均预定义为0，仍以
Figure PCTCN2019116442-appb-000027
为例，其中
Figure PCTCN2019116442-appb-000028
对应
Figure PCTCN2019116442-appb-000029
Figure PCTCN2019116442-appb-000030
对应
Figure PCTCN2019116442-appb-000031
(4)WUS的编号值n WUS_ID，不同WUS的编号值是不一样的。
同理，经过WUS的编号值n WUS_ID加扰处理的WUS，可以避免终端设备因为检测到其他WUS产生虚警。参照前述方法1100和方法1400中的描述，为了简洁，此处不再赘述。
在示例中，L i与前面所述的参数L含义一致，为聚合等级，这里看到可以配置多个聚合等级；
Figure PCTCN2019116442-appb-000032
与前面所述的M含义一致，为候选下行控制信道的数量；
Figure PCTCN2019116442-appb-000033
的值与前面所述的参数m L含义一致，用于确定每个候选下行控制信道的编号。从这里可以看出，所述至少一个第一索引号包括了搜索空间集合中聚合等级为L i的
Figure PCTCN2019116442-appb-000034
个候选下行控制信道的全部CCE的索引号，并且这
Figure PCTCN2019116442-appb-000035
个候选下行控制信道的编号为
Figure PCTCN2019116442-appb-000036
到
Figure PCTCN2019116442-appb-000037
同时CCE编号i的取值为0到L i-1。
终端设备根据上述配置的参数确定WUS的每个候选资源。其中，每个WUS候选资源所关联的CCE索引参数j(即每个第一索引号)的计算公式为：
Figure PCTCN2019116442-appb-000038
其中
Figure PCTCN2019116442-appb-000039
并且
Figure PCTCN2019116442-appb-000040
与
Figure PCTCN2019116442-appb-000041
均不大于
Figure PCTCN2019116442-appb-000042
且不小于0。
公式中参数L i，
Figure PCTCN2019116442-appb-000043
以及
Figure PCTCN2019116442-appb-000044
的值可根据配置的具体参数信息得到，m i即为候选下行控制信道的编号，与前面所述参数m的含义一致。i即为候选下行控制信道的CCE的编号，其余参数的含义在示例二中已经详细描述，这里为了简洁，不再赘述。
可选的，这里m i的值也可以根据示例二中描述的方法得到。
假设搜索空间集合所关联的CORESET中一共有24个CCE，对应聚合等级AL＝1和AL＝2的搜索空间内候选PDCCH的数量均为6。图15是候选WUS资源所关联的CCE索引示意图，如图15所示，仍以
Figure PCTCN2019116442-appb-000045
L 1＝1，L 2＝2，
Figure PCTCN2019116442-appb-000046
为例。
其中，L i值表示候选WUS资源所关联的CCE为聚合等级为L i的候选PDCCH的CCE，
Figure PCTCN2019116442-appb-000047
值表示所关联的聚合等级为L i的候选PDCCH的数量，用于确定候选WUS资源所关联的CCE的数量，从而控制终端设备检测WUS的次数。最后通过
Figure PCTCN2019116442-appb-000048
确定所关联聚合等级为L i的候选PDCCH的索引号。
在图15中，有填充的方块为候选PDCCH的CCE。对于
Figure PCTCN2019116442-appb-000049
L 1＝1，
Figure PCTCN2019116442-appb-000050
候选WUS资源所关联的CCE为聚合等级为1的6个候选PDCCH中的第1和第2个候选PDCCH的CCE，即阴影填充示出的索引号为0、4的CCE。
对于
Figure PCTCN2019116442-appb-000051
L 2＝2，
Figure PCTCN2019116442-appb-000052
候选WUS资源所关联的CCE为聚合等级为2的6个候选PDCCH中的第1个候选PDCCH的CCE，即索引号为0、1的CCE。因此WUS有3个候选位置，所关联CCE的索引号分别为0、1、4，网络设备可在这3个候选位置中任选一个发送WUS。
通过以上过程，终端设备和网络设备可以确定出WUS的每个候选资源所关联的CCE索引参数j后，其余的方法就可以参照方法示例一中的过程，再继续根据CCE的索引号j确定REG bundle的索引号u，再确定REG。具体地，示例一和示例二已经有详细说明，为了简洁、此处不再赘述。
对于示例二和示例三，还有其它的方法可以去实现。
在一种可能的实现方式中，除了列举的配置信息以外，可以通过高层信令为终端设备配置WUS的其它相关参数，例如，可以包括以下几部分相关参数：
(1)WUS所关联的搜索空间集合索引号或ID号，也可以为WUS所关联搜索空间集合的相关参数，如表3中列举的参数，包括该搜索空间集合所关联的CORESET、聚合等级大小、候选控制信道数量、符号位置等。
其中每个聚合等级的候选PDCCH的数量为M i。举例说明，比如{M 1,M 2,M 4,M 8}＝{6,6,2,1}或{0,4,2,1}，其中M 1对应聚合等级AL＝1，M 2对应聚合等级AL＝2，M 4对应聚合等级AL＝4，M 8对应聚合等级AL＝8。
(2)大于1的整数K，例如2或者3等。
(3)WUS的编号值n WUS_ID，不同WUS的编号值是不一样的。
终端设备根据上述列举的配置参数确定WUS的每个候选资源，终端设备可以根据包括多个候选资源的集合，以及该集合中每个候选资源对应的聚合等级L、m以及i的值，确定该CCE所映射的REG所在资源。
可选地，首先，终端设备根据整数K的值获得WUS的候选资源参数
Figure PCTCN2019116442-appb-000053
Figure PCTCN2019116442-appb-000054
这里参数
Figure PCTCN2019116442-appb-000055
的含义与示例三中的
Figure PCTCN2019116442-appb-000056
的含义一致。
举例说明，对于聚合等级的候选PDCCH的数量M i集合{M 1,M 2,M 4,M 8}，那么WUS的候选资源参数
Figure PCTCN2019116442-appb-000057
集合则为
Figure PCTCN2019116442-appb-000058
例如，当{M 1,M 2,M 4,M 8}＝{6,6,2,1}，K＝3时，那么
Figure PCTCN2019116442-appb-000059
在这里整数K相当于一个“衰减因子”，用于控制UE检测WUS的次数。从另一方面来说，如果聚合等级为L i的候选下行控制信道总数量为M i，那么WUS候选资源所关联的聚合等级为L i的候选下行控制信道的数量为
Figure PCTCN2019116442-appb-000060
即所述至少一个第一索引号至少包括了搜索空间集合中聚合等级为L i的
Figure PCTCN2019116442-appb-000061
个候选下行控制信道的全部CCE的索引号。应理解，每个参数
Figure PCTCN2019116442-appb-000062
与一个L i值相对应，其中
Figure PCTCN2019116442-appb-000063
对应L 1＝1，
Figure PCTCN2019116442-appb-000064
对应L 2＝2，
Figure PCTCN2019116442-appb-000065
对应L 4＝4，
Figure PCTCN2019116442-appb-000066
对应L 8＝8。这里参数L i的含义与示例三中的L i的含义一致。
可选的，
Figure PCTCN2019116442-appb-000067
还可以取值为
Figure PCTCN2019116442-appb-000068
则，每个WUS候选资源所关联的CCE索引参数j可以通过以下几种方法确定：
方法1
预定义每个参数
Figure PCTCN2019116442-appb-000069
所对应的
Figure PCTCN2019116442-appb-000070
值。例如均定义为0，也可以网络设备直接配置。方法与实施例三相同。
方法2
可以通过WUS的编号值n WUS_ID得到。
对于每一个非零值
Figure PCTCN2019116442-appb-000071
以及所对应的L i值，UE可计算出对应的i＝n WUS_ID mod L i，k＝n WUS_ID mod K。每个WUS候选资源所关联的CCE索引参数j的计算公式为：
Figure PCTCN2019116442-appb-000072
其中
Figure PCTCN2019116442-appb-000073
那么k的取值用于确定候选下行控制信道的编号。
以图15为例，{M 1,M 2,M 4,M 8}＝{6,6,2,1}，K＝3时，那么
Figure PCTCN2019116442-appb-000074
如果n WUS_ID＝1，那么对于
Figure PCTCN2019116442-appb-000075
i＝n WUS_ID mod L 1＝0，k＝n WUS_ID mod K＝1，那么
Figure PCTCN2019116442-appb-000076
对于
Figure PCTCN2019116442-appb-000077
i＝n WUS_ID mod L 2＝1，k＝n WUS_ID mod K＝1，那么
Figure PCTCN2019116442-appb-000078
那么每个候选WUS资源所关联的CCE索引如图16所示，即通过参数K，n WUS_ID来获得示例二中对于每个聚合等级L的M以及i的取值
当确定出WUS的每个候选资源所关联的CCE索引参数j后，其余的方法参考前述确定CCE的索引j之后的步骤，为了简洁，此处不再赘述。
示例四：
在S1020，该第一信号可以具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成。
在前面三个示例中，该第一信号可以仅具有一种结构，比如第一信号由6个时频资源单元组成。但本发明不限定于此，前面三个示例中第一信号也可以具有多种结构。
每种结构的WUS可以由不同数量的时频资源单元组成。作为其中的一个示例，为了充分复用控制信道的资源，每种WUS结构包含的时频资源单元数量与某个聚合等级的PDCCH的REG数量相等。因此WUS不同结构所包含的时频资源单元数量可以为6、12、 24、48，分别对应聚合等级分别为1、2、4、8的PDCCH。
作为示例而非限定，该WUS可以具有两种结构，结构一和结构二，结构一的WUS由6个时频资源单元组成，结构二的WUS由12个时频资源单元组成，每个时频资源单元在时域上为一个OFDM符号，在频域上为一个资源块。即，该WUS可以与REG具有相同的时频结构。
网络设备可根据实际传输的无线信道状态，以及WUS的覆盖需求，动态地对发送的WUS的结构进行调整，实现链路自适应传输。一般而言，此时终端设备是不知道网络设备所发送的WUS的结构，因此需要终端设备对不同结构的WUS进行检测。可以通过配置参数或者网络设备向终端设备发送指示信息，向终端设备指示WUS的结构。
在一种可能的实现方式中，对于不同结构的第一信号，终端设备可以根据该第一信号的每一种结构，在该至少一个第一索引号中确定至少一个第二索引号；再根据该至少一个第二索引号，确定该至少一个时频资源；终端设备在该至少一个时频资源上，检测该结构的第一信号。也就是说，不同结构的第一信号对应不同的索引号，终端设备在根据每种结构的第一信号所对应的索引号确定的时频资源上检测该种结构的第一信号。
可选地，终端设备可以根据该第一信号的每一种结构确定的至少一个第二索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成，根据该第一信号的不同结构确定的至少一个第二索引号属于搜索空间集合中不同聚合等级的至少一个候选下行控制信道的CCE的索引号。
可选地，网络设备可以通过向终端设备配置参数L i和
Figure PCTCN2019116442-appb-000079
参数L i和
Figure PCTCN2019116442-appb-000080
的可以根据前面所描述的方法(包括示例二和示例三中所述的方法)来确定，每一个参数L i可以对应一种终端设备需要检测的WUS的结构，不同的参数L i对应不同结构的WUS。
Figure PCTCN2019116442-appb-000081
则可以表示该结构的候选WUS的数量，终端设备可以根据该配置参数确定所检测WUS信号的结构。那么对于每一种WUS结构确定的所述至少一个第二索引号由搜索空间中对应聚合等级为L i的
Figure PCTCN2019116442-appb-000082
个候选下行控制信道的全部CCE的索引号组成。即根据每一种不同的WUS结构确定的至少一个第二索引号属于搜索空间集合中对应的不同聚合等级为L i的
Figure PCTCN2019116442-appb-000083
个候选下行控制信道的CCE的索引号。具体地，L 1＝1对应结构1的WUS，结构1的WUS表示该WUS可以由6个时频资源单元组成；
Figure PCTCN2019116442-appb-000084
则表示候选WUS中结构1的WUS有2个。对于每一种WUS结构的参数L i和
Figure PCTCN2019116442-appb-000085
可以根据公式3确定第二索引号，而公式3中的m i的值可以直接根据前面所述的方法确定(包括示例二和示例三中所述的方法)。具体地，以图16为例进行说明，对于
Figure PCTCN2019116442-appb-000086
L 1＝1，
Figure PCTCN2019116442-appb-000087
有2个结构1的候选WUS，所关联的CCE的索引号分别为0和4；对于
Figure PCTCN2019116442-appb-000088
L 2＝2，
Figure PCTCN2019116442-appb-000089
有1个结构2的候选WUS，所关联的CCE索引号为0和1。
当确定出WUS的每种结构的每个候选WUS所关联的CCE索引参数j后，其余的方法参考前述确定CCE的索引j之后的步骤，为了简洁，此处不再赘述。
通过上述技术方案，网络设备可以动态选择发送不同结构的WUS，以灵活满足WUS的覆盖需求，保证WUS传输的可靠性。
根据前述介绍的唤醒信号的传输方法，可以使WUS进行交织映射，获取频率分集增益，提高信道估计性能；同时复用CORESET内控制信道的资源以及资源映射规则，利于后向兼容，降低标准化难度；当网络设备不发送WUS时，对应的WUS资源上可以发送控制信 道，提高资源使用效率。而且，但网络设备可以动态选择发送不同结构的WUS，以灵活满足WUS的覆盖需求，保证WUS传输的可靠性。
以上结合图1至图16对本申请实施例的唤醒信号的传输方法做了详细说明。以下，结合图17至图20对本申请实施例的唤醒信号的传输装置进行详细说明。
图17示出了本申请实施例的唤醒信号的传输装置1700的示意性框图，该装置1700可以对应上述方法1000中描述的终端设备，也可以是应用于终端设备的芯片或组件，并且，该装置1700中各模块或单元分别用于执行上述方法1000中终端设备所执行的各动作或处理过程，如图17所示，该通信装置1700可以包括：处理单元1710、收发单元1717。
处理单元1710，用于确定至少一个时频资源。
该处理单元1710，还用于控制所述收发单元在该至少一个时频资源上，检测第一信号，该至少一个时频资源还用于承载下行控制信道。
该处理单元1710，还用于根据对该第一信号的检测结果，确定是否从第一时间位置开始检测第一信道。
具体地，该处理单元1710用于执行方法1000中的S1010和S1030，该收发单元1720用于执行方法1000中的S1020。各单元执行上述相应步骤的具体过程在方法1000中已经详细说明，为了简洁，此处不加赘述。
图18示出了本申请实施例的唤醒信号的传输装置1800的示意性框图，该装置1800可以对应(例如，可以应用于或本身即为)上述方法400中描述的网络设备(例如基站)，并且，该装置1800中各模块或单元分别用于执行上述方法400中网络设备所执行的各动作或处理过程，如图18所示，该通信装置1800可以包括：处理单元1810和收发单元1820。
该处理单元1810，用于确定至少一个时频资源。
该收发单元1820，用于在该至少一个时频资源上，发送第一信号，该至少一个时频资源还用于承载下行控制信道。
具体地，该处理单元1810用于执行方法1000中的S1010，该收发单元1820用于执行方法1000中的S1020。各单元执行上述相应步骤的具体过程在方法1000中已经详细说明，为了简洁，此处不加赘述。
图19是本申请实施例提供的终端设备1900的结构示意图。如图19所示，该终端设备1900包括处理器1910和收发器1920。可选地，该终端设备1900还包括存储器1930。其中，处理器1910、收发器1920和存储器1930之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器1930用于存储计算机程序，该处理器1910用于从该存储器1930中调用并运行该计算机程序，以控制该收发器1920收发信号。
上述处理器1910和存储器1930可以合成一个处理装置，处理器1910用于执行存储器1930中存储的程序代码来实现上述方法实施例中终端设备的功能。具体实现时，该存储器1930也可以集成在处理器1910中，或者独立于处理器1910。收发器1920可以通过收发电路的方式来实现。
上述终端设备还可以包括天线1940，用于将收发器1920输出的上行数据或上行控制信令通过无线信号发送出去，或者将下行数据或下行控制信令接收后发送给收发器1920进一步处理。
应理解，该装置1900可对应于根据本申请实施例的方法1000中的终端设备，该装置 1900也可以是应用于终端设备的芯片或组件。并且，该装置1900中的各模块实现方法1000中的相应流程，具体地，该存储器1930用于存储程序代码，使得处理器1910在执行该程序代码时，控制该处理器1910用于执行方法1000中的S1010和S1030，控制该收发器1920执行方法1000中的S1020，各单元执行上述相应步骤的具体过程在方法1000中已经详细说明，为了简洁，在此不加赘述。
图20是本申请实施例提供的网络设备2000的结构示意图。如图20所示，该网络设备2000(例如网络设备)包括处理器2010和收发器2020。可选地，该网络设备2000还包括存储器2030。其中，处理器2010、收发器2020和存储器2030之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器2030用于存储计算机程序，该处理器2010用于从该存储器2030中调用并运行该计算机程序，以控制该收发器2020收发信号。
上述处理器2010和存储器2030可以合成一个处理装置，处理器2010用于执行存储器2030中存储的程序代码来实现上述方法实施例中网络设备的功能。具体实现时，该存储器2030也可以集成在处理器2010中，或者独立于处理器2010。收发器2020可以通过收发电路的方式来实现。
上述网络设备还可以包括天线2040，用于将收发器2020输出的下行数据或下行控制信令通过无线信号发送出去，或者将上行数据或上行控制信令接收后发送给收发器820进一步处理。
应理解，该装置2000可对应于根据本申请实施例的方法1000中的网络设备，该装置2000也可以是应用于网络设备的芯片或组件。并且，该装置2000中的各模块实方法1000中的相应流程，具体地，该存储器2030用于存储程序代码，使得处理器2010在执行该程序代码时，控制该处理器2010用于执行方法1000中的S1010，控制该收发器2020用于执行方法1000中的S1020，各单元执行上述相应步骤的具体过程在方法1000中已经详细说明，为了简洁，在此不加赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合的方式来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不加赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合。另一点，所显示或讨论的相互之间的耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接。
另外，在本申请各个实施例中的各功能单元可以集成在一个物理实体中，也可以是各个单元单独对应一个物理实体，也可以两个或两个以上单元集成在一个物理实体中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现 有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (41)

  1. 一种接收信号的方法，其特征在于，包括：
    确定至少一个时频资源；
    在所述至少一个时频资源上，检测第一信号，所述至少一个时频资源还用于承载下行控制信道；
    根据对所述第一信号的检测结果，确定是否从第一时间位置开始检测第一信道。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信号是根据第一序列生成的。
  3. 根据权利要求1或2所述的方法，其特征在于，所述确定所述至少一个时频资源，包括：
    根据至少一个第一索引号，确定所述至少一个时频资源，所述至少一个第一索引号中的每个第一索引号为第一控制资源集合的控制信道单元CCE的索引号。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    根据高层信令，确定所述至少一个第一索引号和所述第一控制资源集合，其中，所述至少一个第一索引号由所述高层信令直接携带。
  5. 根据权利要求3所述的方法，其特征在于，所述第一索引号为搜索空间集合中候选下行控制信道的CCE索引号，所述搜索空间集合中候选下行控制信道的CCE索引号为所述第一控制资源集合的CCE索引号。
  6. 根据权利要求5所述的方法，其特征在于，所述第一索引号为所述搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号，其中0≤i≤L-1。
  7. 根据权利要求6所述的方法，其特征在于，所述方法还包括：
    根据高层信令，确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i，其中，所述聚合等级L、候选下行控制信道的编号m、CCE的编号i由所述高层信令直接携带；或者
    根据预定义的值，确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i。
  8. 根据权利要求2至7中任一项所述的方法，其特征在于，所述至少一个第一索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成。
  9. 根据权利要求2至8中任一项所述的方法，其特征在于，所述第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成；
    其中，根据至少一个第一索引号，确定所述至少一个时频资源，包括：
    根据所述第一信号的每一种结构，在所述至少一个第一索引号中确定至少一个第二索引号；
    根据所述至少一个第二索引号，确定所述至少一个时频资源；
    在所述至少一个时频资源上，检测第一信号，包括：
    在所述至少一个时频资源上，检测所述结构的第一信号。
  10. 根据权利要求9所述的方法，其特征在于，所述根据所述第一信号的每一种结构 确定的至少一个第二索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成，根据所述第一信号的不同结构确定的至少一个第二索引号属于搜索空间集合中不同聚合等级的至少一个候选下行控制信道的CCE的索引号。
  11. 一种发送信号的方法，其特征在于，包括：
    确定至少一个时频资源；
    在所述至少一个时频资源上，发送第一信号，所述至少一个时频资源还用于承载下行控制信道。
  12. 根据权利要求11所述的方法，其特征在于，所述第一信号是根据第一序列生成的。
  13. 根据权利要求11或12所述的方法，其特征在于，所述确定所述至少一个时频资源，包括：
    根据至少一个第一索引号，确定所述至少一个时频资源，所述至少一个第一索引号中的每个第一索引号为第一控制资源集合的控制信道单元CCE的索引号。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    确定所述至少一个第一索引号和所述第一控制资源集合，其中，所述至少一个第一索引号由高层信令直接携带；
    发送所述高层信令。
  15. 根据权利要求13所述的方法，其特征在于，所述第一索引号为搜索空间集合中候选下行控制信道的CCE索引号，所述搜索空间集合中候选下行控制信道的CCE索引号为所述第一控制资源集合的CCE索引号。
  16. 根据权利要求15所述的方法，其特征在于，所述第一索引号为所述搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号，其中0≤i≤L-1。
  17. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i，其中，所述聚合等级L、候选下行控制信道的编号m、CCE的编号i由高层信令直接携带；
    发送所述高层信令；或者
    根据预定义的值，确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i。
  18. 根据权利要求12至17中任一项所述的方法，其特征在于，所述至少一个第一索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成。
  19. 根据权利要求12至18中任一项所述的方法，其特征在于，所述第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成；
    其中，根据至少一个第一索引号，确定所述至少一个时频资源，包括：
    根据所述第一信号的每一种结构，在所述至少一个第一索引号中确定至少一个第二索引号；
    根据所述至少一个第二索引号，确定所述至少一个时频资源；
    在所述至少一个时频资源上，发送第一信号，包括：
    在所述至少一个时频资源上，发送所述结构的第一信号。
  20. 根据权利要求19所述的方法，其特征在于，所述根据所述第一信号的每一种结构确定的至少一个第二索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成，根据所述第一信号的不同结构确定的至少一个第二索引号属于搜索空间集合中不同聚合等级的至少一个候选下行控制信道的CCE的索引号。
  21. 一种接收信号的装置，其特征在于，包括处理单元和收发单元，所述处理单元用于：
    确定至少一个时频资源；
    控制所述收发单元在所述至少一个时频资源上，检测第一信号，所述至少一个时频资源还用于承载下行控制信道；
    根据对所述第一信号的检测结果，确定是否从第一时间位置开始检测第一信道。
  22. 根据权利要求21所述的装置，其特征在于，所述第一信号是根据第一序列生成的。
  23. 根据权利要求21或22所述的装置，其特征在于，所述处理单元还用于：
    根据至少一个第一索引号，确定所述至少一个时频资源，所述至少一个第一索引号中的每个第一索引号为第一控制资源集合的控制信道单元CCE的索引号。
  24. 根据权利要求23所述的装置，其特征在于，所述处理单元还用于：
    根据高层信令，确定所述至少一个第一索引号和所述第一控制资源集合，其中，所述至少一个第一索引号由所述高层信令直接携带。
  25. 根据权利要求23所述的装置，其特征在于，所述第一索引号为搜索空间集合中候选下行控制信道的CCE索引号，所述搜索空间集合中候选下行控制信道的CCE索引号为所述第一控制资源集合的CCE索引号。
  26. 根据权利要求25所述的装置，其特征在于，所述第一索引号为所述搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号，其中0≤i≤L-1。
  27. 根据权利要求26所述的装置，其特征在于，所述处理单元还用于：
    根据高层信令，确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i，其中，所述聚合等级L、候选下行控制信道的编号m、CCE的编号i由所述高层信令直接携带；或者
    根据预定义的值，确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i。
  28. 根据权利要求22至27中任一项所述的装置，其特征在于，所述至少一个第一索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成。
  29. 根据权利要求22至28中任一项所述的装置，其特征在于，所述第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成；
    其中，所述处理单元还用于：
    根据所述第一信号的每一种结构，在所述至少一个第一索引号中确定至少一个第二索引号；
    根据所述至少一个第二索引号，确定所述至少一个时频资源；
    在所述至少一个时频资源上，检测所述结构的第一信号。
  30. 根据权利要求29所述的装置，其特征在于，所述根据所述第一信号的每一种结构确定的至少一个第二索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成，根据所述第一信号的不同结构确定的至少一个第二索引号属于搜索空间集合中不同聚合等级的至少一个候选下行控制信道的CCE的索引号。
  31. 一种发送信号的装置，其特征在于，包括处理单元和收发单元，所述处理单元用于：
    确定至少一个时频资源；
    收发单元，用于在所述至少一个时频资源上，发送第一信号，所述至少一个时频资源还用于承载下行控制信道。
  32. 根据权利要求31所述的装置，其特征在于，所述第一信号是根据第一序列生成的。
  33. 根据权利要求31或32所述的装置，其特征在于，所述处理单元还用于：
    根据至少一个第一索引号，确定所述至少一个时频资源，所述至少一个第一索引号中的每个第一索引号为第一控制资源集合的控制信道单元CCE的索引号。
  34. 根据权利要求33所述的装置，其特征在于，所述处理单元还用于：
    确定所述至少一个第一索引号和所述第一控制资源集合，其中，所述至少一个第一索引号由高层信令直接携带；
    所述收发单元，还用于发送所述高层信令。
  35. 根据权利要求33所述的装置，其特征在于，所述第一索引号为搜索空间集合中候选下行控制信道的CCE索引号，所述搜索空间集合中候选下行控制信道的CCE索引号为所述第一控制资源集合的CCE索引号。
  36. 根据权利要求35所述的装置，其特征在于，所述第一索引号为所述搜索空间集合中聚合等级为L、编号为m的候选下行控制信道中编号为i的CCE的索引号，其中0≤i≤L-1。
  37. 根据权利要求36所述的装置，其特征在于，所述处理单元还用于：
    确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i，其中，所述聚合等级L、候选下行控制信道的编号m、CCE的编号i由高层信令直接携带；
    所述收发单元，还用于发送所述高层信令；或者
    所述处理单元还用于根据预定义的值，确定所述聚合等级L、候选下行控制信道的编号m、CCE的编号i。
  38. 根据权利要求32至37中任一项所述的装置，其特征在于，所述至少一个第一索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成。
  39. 根据权利要求32至38中任一项所述的装置，其特征在于，所述第一信号具有至少一种结构，不同结构的第一信号由不同数量的时频单元组成；
    其中，所述处理单元还用于：
    根据所述第一信号的每一种结构，在所述至少一个第一索引号中确定至少一个第二索引号；
    根据所述至少一个第二索引号，确定所述至少一个时频资源；
    以及所述收发单元用于：
    在所述至少一个时频资源上，发送所述结构的第一信号。
  40. 根据权利要求39所述的装置，其特征在于，所述根据所述第一信号的每一种结构确定的至少一个第二索引号由搜索空间集合中至少一个聚合等级的至少一个候选下行控制信道的全部CCE的索引号组成，根据所述第一信号的不同结构确定的至少一个第二索引号属于搜索空间集合中不同聚合等级的至少一个候选下行控制信道的CCE的索引号。
  41. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被执行时，实现如权利要求1至20中任意一项所述的方法。
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