WO2023035518A1 - 一种无线通信控制信息传输方法和设备 - Google Patents

一种无线通信控制信息传输方法和设备 Download PDF

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Publication number
WO2023035518A1
WO2023035518A1 PCT/CN2022/070459 CN2022070459W WO2023035518A1 WO 2023035518 A1 WO2023035518 A1 WO 2023035518A1 CN 2022070459 W CN2022070459 W CN 2022070459W WO 2023035518 A1 WO2023035518 A1 WO 2023035518A1
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Prior art keywords
signal
carrier
amplitude
control information
wireless communication
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PCT/CN2022/070459
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English (en)
French (fr)
Inventor
宋国超
闫志宇
江甲沫
杜滢
王志勤
魏贵明
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中国信息通信研究院
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Publication of WO2023035518A1 publication Critical patent/WO2023035518A1/zh

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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
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • 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
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • 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 technical field of wireless communication, and in particular to a method and device for transmitting control information of wireless communication.
  • a widely used low-power information transmission method is: the sending device loads the information on the OOK (On-Off Keying, on-off keying) signal, and the receiving device uses the method of envelope detection or amplitude detection for the signal. to demodulate.
  • OOK On-Off Keying, on-off keying
  • the present application proposes a wireless communication control information transmission method and device, which solves the problem that the existing method and device are not suitable for multi-carrier systems, and is especially suitable for cellular wireless mobile communication systems.
  • the present application proposes a wireless communication control information transmission method, including the following steps:
  • a multi-carrier on-off keying signal is generated by adjusting the amplitude of the multi-carrier signal, and the multi-carrier on-off keying signal is used to carry control information, and the amplitude of the multi-carrier on-off keying signal shows high and low changes within a preset time.
  • the method for adjusting the amplitude of the multi-carrier signal is at least one of the following: Method 1: Generate the multi-carrier on-off keying signal by controlling the amplitude of the first preset symbol set in the data frame of the multi-carrier signal.
  • Mode 2 Generate the multi-carrier on-off keying signal by shortening the length of the cyclic prefix of the data frame of the multi-carrier signal.
  • Mode 3 Generate the multi-carrier switching keying signal by reducing the transmission power of the second preset symbol set in the data frame of the multi-carrier signal or reducing the number of carriers.
  • Mode 4 Generate the multi-carrier on-off keying signal by controlling the amplitude variation within one symbol of the multi-carrier signal
  • said multi-carrier signal is a physical signal in a cellular mobile communication network.
  • the high-amplitude signal is a multi-carrier on-off keying signal whose amplitude is greater than a first threshold
  • the low-amplitude signal is a multi-carrier on-off keying signal whose amplitude is smaller than a second threshold
  • the preset time is one symbol or one frame of data.
  • the average power of the high-amplitude signal in the multi-carrier switch keying signal is at least twice the average power of the low-amplitude signal.
  • the manner in which the multi-carrier on-off keying signal carries control information is at least one of the following: different control information is carried by the length of the high-amplitude and/or low-amplitude signals in the multi-carrier on-off keying signal.
  • the different control information is carried by the position of the high-amplitude and/or low-amplitude signals in the multi-carrier switch keying signal.
  • control information includes at least one of the following: a synchronization reference signal, a device identification number (ID), a synchronization broadcast signal, an activation signal, parameter configuration information, and resource configuration information.
  • the method further includes: acquiring at least one item of information among received signal strength, detection sensitivity, circuit hardware structure, and envelope detection circuit response of the receiving device, so as to adjust the amplitude of the multi-carrier signal.
  • the method of adjusting the amplitude of the multi-carrier signal is selected according to a pre-designed criterion: if the envelope detection response time of the receiving device is less than a complete symbol length of the multi-carrier signal, the method 1 or the method 3 is selected. If the envelope detection response time of the receiving device is less than a complete symbol length of the multi-carrier signal and greater than the cyclic prefix length of a complete symbol of the multi-carrier signal, the fourth method is selected. If the envelope detection response time of the receiving device is less than the cyclic prefix length of one complete symbol of the multi-carrier signal, the second method is selected.
  • the step of adjusting the amplitude of the multi-carrier signal through the first method further includes: if T s > ⁇ t, then the first preset symbol set is composed of one or more complete symbols; otherwise, setting the first coefficient k , so that (k-1)T s ⁇ t ⁇ kT s , the first preset symbol set consists of k consecutive complete symbols.
  • the data carried by all symbols in the first preset symbol set are set as low-amplitude signals, and the data carried by other symbols are set as high-amplitude signals.
  • T s is a complete symbol length of the multi-carrier signal
  • ⁇ t is the response time of the envelope detection circuit of the receiving device.
  • the step of adjusting the amplitude of the multi-carrier signal through the second method further includes: if T cp > ⁇ t, then truncating the length of the cyclic prefix of the data frame of the multi-carrier signal to T cp - ⁇ t; wherein, T cp is the length of the cyclic prefix of the data frame of the multi-carrier signal, and ⁇ t is the envelope detection response time of the receiving device.
  • the step of adjusting the amplitude of the multi-carrier signal through the third method further includes: in the multi-carrier signal, reducing the transmission power of all symbols in the second preset symbol set to be less than the high power detected by the receiving device The usual receiving power value, or, keeping the sending power unchanged, setting the data carried by all the symbols in the second preset symbol set as null data.
  • the step of adjusting the amplitude of the multi-carrier signal through the third method further includes: if the sending device can directly control the time-domain sampling of each symbol of the multi-carrier signal, splitting one symbol of the multi-carrier signal It is divided into two parts, and the transmission power of a part of symbols is set to be greater than Ph , and the transmission power of another part of symbols is less than Ph , and the time of being less than Ph is greater than ⁇ t. If the sending device cannot directly control the time-domain sampling of each symbol of the multi-carrier signal, an approximation method is used to make the amplitude of the multi-carrier signal vary within one symbol. Among them, Ph is the received power value when the receiving device detects a high level, and ⁇ t is the response time of the envelope detection circuit of the receiving device.
  • the synchronization reference signal is carried by the position of the periodic low-amplitude or high-amplitude signal in the multi-carrier switch keying signal.
  • the method described in any one embodiment of the first aspect of the present application is used for a network device, and includes the following steps: sending the multi-carrier switch keying signal.
  • the method described in any one embodiment of the first aspect of the present application is used for sending a terminal device, including the following steps: sending the multi-carrier switching keying signal.
  • the method described in any one embodiment of the first aspect of the present application is used for receiving terminal equipment, including the following steps:
  • the present application also proposes a wireless communication control information transmission network device.
  • at least one module in the wireless communication control information transmission network device is used for at least one of the following Item function: used to receive at least one item of information in the received signal strength, detection sensitivity, circuit hardware structure, and circuit hardware response of the receiving device; used to select a method for adjusting the amplitude of the multi-carrier signal according to pre-designed criteria; used to send the Multi-carrier switching keying signal.
  • the present application also proposes wireless communication control information transmission terminal equipment, using any one of the methods described in the first aspect of the application, at least one module in the wireless communication control information transmission terminal equipment is used for at least one of the following functions : used for receiving at least one piece of information in the received signal strength, detection sensitivity, circuit hardware structure and circuit hardware response of the receiving device; used to select a way to adjust the amplitude of the multi-carrier signal according to a pre-designed criterion; used to send the multi-carrier On-off keying signal.
  • the present application also proposes wireless communication control information transmission terminal equipment, using the method described in any one of the first aspect of the application, at least one module in the wireless communication control information transmission terminal equipment is used for at least one of the following functions : At least one module in the wireless communication control information transmission terminal device is used for at least one of the following functions: for receiving the multi-carrier on-off keying signal; The duration or position of the amplitude or low amplitude signal is used to demodulate control information; it is used to send and receive at least one item of information in the signal strength, detection sensitivity, and circuit hardware response of the receiving device.
  • the present application also proposes a communication device, including: a memory, a processor, and a computer program stored on the memory and operable on the processor.
  • a communication device including: a memory, a processor, and a computer program stored on the memory and operable on the processor.
  • the present application also proposes a computer-readable medium, where a computer program is stored on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method described in any one embodiment of the first aspect of the present application are implemented.
  • the present application also proposes a mobile communication system, including at least one network device as described in any embodiment of the present application and/or at least one terminal device as described in any embodiment of the present application.
  • the present invention can reliably send information to low-power devices, and is compatible with multi-carrier systems without changing the hardware structure of existing systems; in addition, the present invention fully considers the transmission characteristics of multi-carriers and the circuit detection of low-power terminals The ability can effectively reduce the overhead of signaling transmission and ensure the low power consumption of the device.
  • Fig. 1 (a) is the flow chart of the embodiment of the application method
  • Fig. 1 (b) is the first frame structural representation of the multi-carrier switch keying signal of the embodiment of the application method
  • FIG. 1(c) is a schematic diagram of the second frame structure of the multi-carrier on-off keying signal in an embodiment of the method of the present application;
  • Fig. 1(d) is a schematic diagram of the structure of the third frame of the multi-carrier on-off keying signal according to the embodiment of the method of the present application;
  • Fig. 1 (e) is the schematic diagram of the structure of the fourth frame of the multi-carrier on-off keying signal of the embodiment of the method of the present application;
  • FIG. 2 is a flow chart of an embodiment of the method of the present application used in a network device
  • FIG. 3 is a flow chart of an embodiment of the method of the present application applied to a terminal device
  • Figure 4(a) is a schematic diagram of an application scenario of another embodiment of the method of the present application.
  • FIG. 4(b) is a time-domain schematic diagram of a multi-carrier on-off keying signal in another embodiment of the method of the present application.
  • FIG. 5 is a schematic diagram of an embodiment of a network device
  • FIG. 6 is a schematic diagram of an embodiment of a terminal device
  • FIG. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • Fig. 8 is a block diagram of a terminal device according to another embodiment of the present invention.
  • Fig. 1(a) is a flowchart of an embodiment of the method of the present application
  • Fig. 1(b)-(e) is a schematic diagram of the frame structure of a multi-carrier on-off keying signal in an embodiment of the method of the present application.
  • This application proposes a wireless communication control information transmission method, including the following steps 101-102:
  • Step 101 adjusting the amplitude of the multi-carrier signal to generate a multi-carrier on-off keying signal.
  • a sending device sends the multi-carrier on-off keying signal to a receiving device, where the sending device may be a network device or a terminal device, and the receiving device may be a terminal device. It should be noted that the receiving device may be a device or a group of devices.
  • the amplitude of the multi-carrier on-off keying signal varies from high to low within a preset time, preferably, the average power of the high amplitude signal is at least twice the average power of the low amplitude signal.
  • the amplitude in the present invention refers to the level amplitude
  • a high-amplitude signal is a high-level signal
  • a low-amplitude signal is a low-level signal
  • said multi-carrier signal is a physical signal in a cellular mobile communication network. It should be noted that the method of the present invention is especially applicable to cellular mobile communication networks.
  • step 101 the manner of adjusting the amplitude of the multi-carrier signal is at least one of the following manners 1 to 4:
  • Mode 1 Generate the multi-carrier switch keying signal by controlling the amplitude of the first preset symbol set in the data frame of the multi-carrier signal.
  • the multi-carrier on-off keying signal can be generated by setting the amplitude of some specific symbols in the multi-carrier on-off keying signal to 0.
  • the first preset symbol set is one or more complete symbols included in the multi-carrier signal preset; controlling the amplitude of the first preset symbol set refers to setting the first preset All symbols in the symbol set carry data set high or low. It should be noted that the low level may refer to a signal amplitude of 0.
  • Figure 1(b) provides an implementation of mode 1, specifically:
  • the multi-carrier on-off keying signal includes symbol 1, symbol 2, ... in the time domain, and N carriers in the frequency domain, and T s is a complete set of the multi-carrier signal
  • the symbol length is, for example, the length of one OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbol
  • ⁇ t is the response time of the envelope detection circuit of the receiving device.
  • the first preset symbol set consists of one or more complete symbols in units of a complete data symbol length.
  • the first preset matching set By controlling all the symbols in the first preset matching set to not carry data and generate low-level signals, other data symbols are regarded as high-level signals to generate the multi-carrier switching keying signal.
  • the multi-carrier switch keying signal is generated by controlling all symbols in the first preset symbol set not to carry data.
  • Mode 2 Generate the multi-carrier on-off keying signal by shortening the length of the cyclic prefix of the data frame of the multi-carrier signal.
  • a multi-carrier OOK signal can be generated by replacing part of a symbol CP (Cyclic Prefix, cyclic prefix) of the multi-carrier signal with a guard interval 0. Mode 2 does not affect the information transmission of the multi-carrier signal itself.
  • Figure 1(c) provides an implementation of mode 2, specifically:
  • the multi-carrier switching keying signal includes symbols 1 to 3, symbol 1 includes CP and S1, symbol 2 includes CP and S2, symbol 3 includes CP and S3, and CP is the data frame of the multi-carrier signal S1 is an OFDM signal with symbol 1 not inserted into a CP, S2 is an OFDM signal with symbol 2 not inserted into a CP, and S3 is an OFDM signal with symbol 3 not inserted into a CP.
  • T cp is the length of the cyclic prefix of the data frame of the multi-carrier signal
  • ⁇ t is the envelope detection response time of the receiving device, comparing the size of T cp and ⁇ t:
  • T cp > ⁇ t
  • the length of the cyclic prefix of the data frame of the multi-carrier signal can be truncated to T cp - ⁇ t, and the amplitude of the multi-carrier signal within the time period of ⁇ t is set to 0 to generate the multi-carrier on-off keying signal .
  • the position of ⁇ t can occupy the front ⁇ t of the cyclic prefix of the data frame of the multi-carrier signal as shown in Fig. 1(c), and can also occupy other positions of the cyclic prefix of the data frame of the multi-carrier signal.
  • Mode 3 Generate the multi-carrier on-off keying signal by reducing the transmit power of the second preset symbol set in the data frame of the multi-carrier signal or reducing the number of carriers.
  • the multi-carrier OOK signal is generated by setting a part of the carrier data of the multi-carrier signal to 0.
  • method 3 can increase the transmission rate of the multi-carrier system; compared with method 2, method 3 does not change the CP length, making the multi-carrier system better against multipath.
  • Figure 1(d) provides an implementation of mode 2, specifically:
  • the multi-carrier on-off keying signal includes symbol 1, symbol 2, ... in the time domain, and N carriers in the frequency domain, and T s is a complete set of the multi-carrier signal symbol length.
  • the transmission power of some symbols can be set to be less than Ph
  • the second preset symbol set is the set transmission power of which is less than Ph All symbols.
  • Mode 4 Generate the multi-carrier on-off keying signal by controlling the amplitude variation within one symbol of the multi-carrier signal.
  • the fourth method can increase the multi-carrier transmission rate and the rate of the control information.
  • FIG. 1(e) provides an implementation of mode 4, specifically:
  • one amplitude of the multi-carrier switch keying signal contains both low-level signals and high-level signals.
  • the sending device can directly control the time-domain sampling of each symbol of the multi-carrier signal, then split one symbol of the multi-carrier signal into two parts, set the transmission power of one part of the symbol to be greater than Ph , and set the transmission power of the other part of the symbol to The power is less than Ph , and the time of being less than Ph is greater than ⁇ t.
  • an approximation method is used to make the amplitude of the multi-carrier signal vary within one symbol.
  • T l and d l the duration and amplitude of the low-level signal in the time domain
  • T h and d h the duration and amplitude of the high-level signal in the time domain
  • the transmitted data set of the m-th multi-carrier is ⁇ A m ⁇
  • the amplitude of the symbol is less than d l within the time T l
  • the amplitude of the symbol within the time T h The value is greater than d h .
  • the above method 1 to method 4 can generate a multi-carrier on-off keying signal without destroying the structure of the multi-carrier signal, which can be based on at least one of the response time of the circuit, the length of the multi-carrier symbol and the length of the CP information to select the generation method of the multi-carrier on-off keying signal, and also select the method of adjusting the amplitude of the multi-carrier signal according to a pre-designed criterion.
  • the pre-designed criterion is: if the envelope detection response time of the receiving device is less than a complete symbol length of the multi-carrier signal, then select the above-mentioned mode 1 or mode 3; if the envelope detection response time of the receiving device is less than the multi-carrier signal If the length of a complete symbol is greater than the cyclic prefix length of a complete symbol of the multi-carrier signal, select the above method 4; if the envelope detection response time of the receiving device is shorter than the cyclic prefix length of a complete symbol of the multi-carrier signal, select the above method 2.
  • the generation manner of the multi-carrier on-off keying signal may also be selected through other manners, which are not specifically limited here.
  • step 101 after receiving a signal carrying control information through an antenna, the receiving device sends the signal to an envelope detection circuit. Specifically, first send the signal to the impedance matching circuit, then send it to the integrator, accumulate the signal, and finally send the accumulated signal to the comparator, if the accumulated signal is greater than the preset threshold, it will be recorded as a high level; otherwise , is low. Finally, the control information is obtained by detecting the length or position demodulation of the high-level and/or low-level signals.
  • Step 102 the multi-carrier switch keying signal is used to carry control information.
  • control information is control information of the receiving device, and the manner in which the multi-carrier switch keying signal carries the control information is at least one of the following.
  • Way 1 Different control information is carried according to the length of the high-level and/or low-level signals in the multi-carrier switch keying signal.
  • Different control information is carried by the length of the high-level signal and/or low-level signal.
  • the duration of the low-level signal can be defined as 10 microseconds to indicate information 0, and the duration of the low-level signal to be 20 microseconds to indicate Information 1, Information 0 and Information 1 refer to two different control information.
  • Mode 2 Different control information is carried according to the position of the high-level and/or low-level signals in the multi-carrier switch keying signal.
  • the position of the low-level signal is judged by the high-level signal and/or the low-level signal relative to the start point or the end point. For example, when the interval between the low level signal and the start point signal is 10 milliseconds, it means information 0; when the interval between the low level signal and the start point signal is 200 milliseconds, it means information 1.
  • low-level signals at both ends can be set to carry signaling.
  • control information includes at least one of the following: a synchronization reference signal, a device identification number, a synchronization broadcast signal, an activation signal, parameter configuration information, and resource configuration information.
  • the sending device first obtains the circuit structure of the receiving device, the received signal strength RSSI, and the received power when the comparator determines that the received signal is low, and then calculates the receiving sensitivity of the receiving device and the response time of the circuit to the step signal.
  • the above parameters can be used for optimization. Generation of multi-carrier on-off keying signals.
  • the synchronization reference signal may be carried by the position of the periodic low-level or high-level signal in the multi-carrier switch keying signal.
  • a low-level signal or a high-level signal can be set as a periodic signal, for example, a low-level signal or a high-level signal is sent every 10ms, which is used as a synchronization signal for the receiving device.
  • PBCH Physical Broadcasting Channel, Physical Broadcast Channel
  • the embodiment of the present invention provides a wireless communication control information transmission method, which solves the problem that the existing method is mainly used for terminal activation and cannot be used for control information transmission; moreover, the method of the present invention is compatible with the existing multi-carrier wireless system.
  • the method of the invention utilizes the characteristics of multi-carriers to generate multi-carrier OOK signals, does not affect the signal structure of multi-carriers and existing transmission protocols, and can be directly applied to existing multi-carrier systems.
  • the present invention uses the length of the low-level signal or the position of the low-level signal to carry the signal, and does not require a lengthy preamble.
  • FIG. 2 is a flow chart of an embodiment of the method of the present application applied to a network device.
  • the method described in any one embodiment of the first aspect of the present application is used for network equipment, and includes the following steps 201-202:
  • Step 201 acquiring at least one item of information among the signal strength, detection sensitivity and circuit hardware response of the receiving device.
  • step 201 is an optional step in this embodiment of the present invention.
  • the network device can determine the received power when the received signal is at a low level according to the circuit structure of the receiving device, the received signal strength RSSI and the comparator, and then calculate the receiving sensitivity of the receiving device and the response time of the circuit to the step signal .
  • the network device can select the generation mode of the multi-carrier on-off keying signal according to the response time of the circuit to the step signal, the symbol length of the multi-carrier on-off keying signal, and the length of the CP.
  • Step 202 sending the multi-carrier switching keying signal.
  • FIG. 3 is a flow chart of an embodiment in which the method of the present application is applied to a terminal device.
  • the method described in any one embodiment of the first aspect of the present application is used for receiving terminal equipment, including the following steps:
  • Step 301 Receive the multi-carrier on-off keying signal, and detect a high-level or low-level signal.
  • step 301 after receiving a signal carrying control information through an antenna on the receiving terminal device, the signal is sent to an envelope detection circuit.
  • the envelope detection circuit removes the carrier frequency of the signal, and sends the envelope signal with the carrier frequency removed to the comparator, and then detects the high and low levels of the signal.
  • Step 302 Demodulate the control information by counting the duration or position of the high-level or low-level signal of the multi-carrier on-off keying signal.
  • step 302 the receiving terminal device uses a counter to identify the duration of the high-level signal and/or the low-level signal, and the position of the high-level signal or the low-level signal.
  • the sending device uses the duration length to carry information, it demodulates the control information by counting the length of the low level; when the sending device uses the low level position to carry information, it first calculates the starting position of the signal, and then keeps counting until A high level appears, and the counting cycle is recorded, and then the control information is demodulated through the counting cycle.
  • Fig. 4(a) is a schematic diagram of an application scenario of another embodiment of the method of the present application
  • Fig. 4(b) is a schematic time domain diagram of a multi-carrier switch keying signal of another embodiment of the method of the present application.
  • the first device sends a multi-carrier on-off keying signal to the second device, the multi-carrier on-off keying signal is used to carry control information, and the first device sends a signaling carrying data information to the third device .
  • the first device sends control information to the second device through the multi-carrier switch keying signal.
  • the first device has the capability of sending multi-carrier signals
  • the second device has the capabilities of signal reception, envelope detection and signal comparison.
  • the first device may be a network device or a terminal device, and the second device and the third device may both be terminal devices.
  • the second device is a low-power terminal device that cannot parse the signaling carrying data information sent by the first device, and the second device can obtain Control the content of the information, so as to realize the signaling interaction.
  • the first device sends the signaling carrying control information and the signaling carrying data information to the second device and the third device respectively. For low-loss terminal information transmission.
  • the first device may also send the multi-carrier switching keying signal and the signaling carrying data information to the third device at the same time.
  • the third device analyzes and acquires corresponding information according to corresponding protocols.
  • the first device may send the signaling carrying control information and the signaling carrying data information to the second device and the third device at the same time or at different times.
  • Figure 4(b) describes the characteristics of the multi-carrier switching keying signal, which is a time-domain characteristic.
  • the amplitude of the multi-carrier on-off keying signal presents a high-low variation within a preset time, and the average power of the high-amplitude signal is at least twice the average power of the low-amplitude signal.
  • the preset time is a symbol or a frame of data
  • a symbol is composed of an OFDM signal inserted into a CP and a CP, as shown in Figure 1(c);
  • a frame of data is composed of a plurality of consecutive symbols, usually including Frame header, payload data, frame trailer.
  • the high-amplitude signal and the low-amplitude signal can be distinguished by setting a threshold, and the high-amplitude signal and the low-amplitude signal meet: the average power of the high-amplitude signal is at least twice the average power of the low-amplitude signal.
  • the high-amplitude signal is a multi-carrier on-off keying signal whose amplitude is greater than a first threshold
  • the low-amplitude signal is a multi-carrier on-off keying signal whose amplitude is smaller than a second threshold.
  • the first threshold and the second threshold are set amplitude values, which may be the same or different, and are not specifically limited here.
  • the first threshold is 3V
  • the second threshold is 2.5V .
  • the signal whose amplitude is equal to the first threshold or the second threshold may be a high-amplitude signal or a low-amplitude signal.
  • the first threshold and the second threshold are set such that the average power of the high-amplitude signal is at least twice the average power of the low-amplitude signal, the first threshold and/or second threshold.
  • the feature of the multi-carrier on-off keying signal is that the power of the multi-carrier signal varies from high to low within one symbol or one frame of data.
  • a multi-carrier signal in a high-power time period is defined as a high-amplitude signal, that is, a high-level signal;
  • a multi-carrier signal in a low-power time period is defined as a low-amplitude signal, that is, a low-level signal, and the average power of a high-amplitude signal is at least Twice the average power of low-amplitude signals.
  • Fig. 5 is a schematic diagram of an embodiment of a network device.
  • the embodiment of the present application also proposes a network device, using the method in any one of the embodiments of the present application, the network device is configured to: send a multi-carrier on-off keying signal.
  • a network device 400 proposed in this application includes a network sending module 401 , a network determining module 402 , and a network receiving module 403 .
  • the network sending module is configured to send the multi-carrier switch keying signal.
  • the network determination module is configured to select a mode of adjusting the amplitude of the multi-carrier signal according to a pre-designed criterion.
  • the network receiving module is used to receive at least one item of information from the receiving device, including received signal strength, detection sensitivity, circuit hardware structure and envelope detection circuit response.
  • Fig. 6 is a schematic diagram of an embodiment of a terminal device.
  • the present application also proposes a terminal device, using the method in any one of the embodiments of the present application, the terminal device is configured to: send a multi-carrier on-off keying signal.
  • a terminal device 500 proposed in this application includes a terminal sending module 501 , a terminal determining module 502 , and a terminal receiving module 503 .
  • the terminal receiving module is configured to receive the multi-carrier switch keying signal.
  • the terminal determining module is configured to demodulate control information according to the detected duration or position of the high level or low level signal of the multi-carrier switch keying signal.
  • the terminal sending module is used to send at least one item of information among signal strength, detection sensitivity, circuit hardware structure and envelope detection circuit response of the receiving device.
  • the terminal equipment mentioned in this application may refer to mobile terminal equipment.
  • a network device 600 includes a processor 601 , a wireless interface 602 , and a memory 603 .
  • the wireless interface may be a plurality of components, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium.
  • the wireless interface realizes the communication function with the terminal equipment, processes wireless signals through the receiving and transmitting means, and the data carried by the signals communicates with the memory or the processor through the internal bus structure.
  • the memory 603 contains a computer program for executing any one of the embodiments of the present application, and the computer program runs or changes on the processor 601 .
  • the bus system includes a data bus, a power bus, a control bus and a status signal bus, which will not be repeated here.
  • Fig. 8 is a block diagram of a terminal device according to another embodiment of the present invention.
  • the terminal device 700 includes at least one processor 701 , a memory 702 , a user interface 703 and at least one network interface 704 .
  • Various components in the terminal device 700 are coupled together through a bus system.
  • a bus system is used to implement the connection communication between these components.
  • the bus system includes data bus, power bus, control bus and status signal bus.
  • the user interface 703 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen.
  • Memory 702 stores executable modules or data structures.
  • An operating system and application programs can be stored in the memory.
  • the operating system includes various system programs, such as framework layer, core library layer, driver layer, etc., for realizing various basic services and processing tasks based on hardware.
  • the application program includes various application programs, such as a media player, a browser, etc., and is used to implement various application services.
  • the memory 702 includes a computer program for executing any embodiment of the present application, and the computer program is run or changed on the processor 701 .
  • the memory 702 includes a computer-readable storage medium, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 701, each step of the method embodiment as described in any one of the foregoing embodiments is implemented.
  • the processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the method of the present application may be completed by an integrated logic circuit of hardware in the processor 701 or instructions in the form of software.
  • the processor 701 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component.
  • Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects.
  • the device of the present application includes one or more processors (one of CPU, FGAP, MUC), input/output user interface, network interface and memory.
  • the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present application also proposes a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any one embodiment of the present application are implemented.
  • the memory 603, 702 of the present invention may include non-permanent memory in a computer-readable medium, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory ( flash RAM).
  • Computer-readable media including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information.
  • Information may be computer readable instructions, data structures, modules of a program, or other data.
  • Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridge, tape magnetic disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
  • computer-readable media excludes transitory computer-readable media, such as modulated data signals and carrier waves.
  • this application also proposes a mobile communication system, including at least one embodiment of any terminal device in this application and/or at least one embodiment of any network device in this application.

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Abstract

本申请公开了一种无线通信控制信息传输方法，包含以下步骤：调节多载波信号幅度生成多载波开关键控信号，所述多载波开关键控信号用于携带控制信息。调节多载波信号幅度的方式为以下至少一种：通过控制多载波信号的数据帧中第一预设符号集合的幅度，生成多载波开关键控信号；通过截短多载波信号的数据帧的循环前缀的长度，生成多载波开关键控信号；通过降低多载波信号的数据帧中第二预设符号集合的发射功率或者减少载波数，生成多载波开关键控信号；通过控制所述多载波信号的一个符号内的幅度变化，生成多载波开关键控信号。本申请还包含应用所述方法的装置。本申请解决了现有方法和设备不适用多载波系统问题，尤其适用于蜂窝无线移动通信系统。

Description

一种无线通信控制信息传输方法和设备
本申请要求于2021年09月10日提交中国国家知识产权局、申请号为202111064480.4、发明名称为“一种无线通信控制信息传输方法和设备”的中国专利申请的优先权，该在先申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种无线通信控制信息传输方法和设备。
背景技术
在很多物联网场景中，设备部署之后难以维修，或者频繁更换设备的电池需要极高的成本，因此需要低功耗无线通信技术，以降低设备的维护开销。目前，一种被广泛应用的低功耗信息传输方式是：发送设备将信息加载到OOK(On-Off Keying，开关键控)信号上，接收设备使用包络检测或者幅度检测的方法对该信号进行解调。现有的低功耗信息传输方法主要是用于单载波系统，无法直接应用于现有的多载波系统，例如蜂窝网络、Wi-Fi网络；并且，现有方法主要用于低功耗终端的激活，针对反向散射系统设备没有控制信息传输方法，导致传输效率不高，性能不好。
发明内容
本申请提出一种无线通信控制信息传输方法和设备，解决现有方法和设备不适用多载波系统的问题，尤其适用于蜂窝无线移动通信系统。
第一方面，本申请提出一种无线通信控制信息传输方法，包含以下步骤：
通过调节多载波信号的幅度生成多载波开关键控信号，所述多载波开关键控信号用于携带控制信息，在预设时间内所述多载波开关键控信号的幅度呈现高低变化。
所述调节多载波信号幅度的方式为以下至少一种：方式一、通过控制所述多载波信号的数据帧中第一预设符号集合的幅度，生成所述多载波开关键控信号。方式二、通过截短所述多载波信号的数据帧的循环前缀的长度，生成所述多载波开关键控信号。方式三、通过降低所述多载波信号的数据帧中第二预设 符号集合的发射功率或者减少载波数，生成所述多载波开关键控信号。方式四、通过控制所述多载波信号的一个符号内的幅度变化，生成所述多载波开关键控信号
优选地，所述多载波信号是蜂窝移动通信网络中的物理信号。
优选地，所述高幅度信号为幅度大于第一阈值的多载波开关键控信号，所述低幅度信号为幅度小于第二阈值的多载波开关键控信号。
优选地，所述预设时间为一个符号或者一帧数据。
优选地，在所述多载波开关键控信号中高幅度信号的平均功率至少为低幅度信号的平均功率的2倍。
优选地，所述多载波开关键控信号携带控制信息的方式为以下至少一种：通过所述多载波开关键控信号中高幅度和/或低幅度信号的长度来携带不同的所述控制信息。通过所述多载波开关键控信号中高幅度和/或低幅度信号的位置来携带不同的所述控制信息。
进一步地，所述控制信息包含以下至少一种：同步参考信号、设备身份识别号(ID)、同步广播信号、激活信号、参数配置信息和资源配置信息。
进一步地，所述方法还包含：获取接收设备的接收信号强度、检测灵敏度、电路硬件结构和包络检测电路响应中的至少一项信息，用来调整所述多载波信号的幅度。
进一步地，按预先设计的准则选择调节多载波信号幅度的方式：若接收设备的包络检测响应时间小于多载波信号的一个完整符号长度，则选择所述方式一或者方式三。若接收设备的包络检测响应时间小于多载波信号的一个完整符号长度且大于多载波信号一个完整符号的循环前缀长度，则选择所述方式四。若接收设备的包络检测响应时间小于多载波信号一个完整符号的循环前缀长度，则选择所述方式二。
优选地，通过所述方式一调节多载波信号幅度的步骤，进一步包含：若T s＞Δt，则所述第一预设符号集合由一个或多个完整符号构成；否则，设置第一系数k，使得(k-1)T s≤Δt＜kT s，所述第一预设符号集合由连续k个完整符号构成。在所述多载波信号中，将所述第一预设符号集合的所有符号携带的数据设置为低幅度信号，其他符号携带的数据设置为高幅度信号。其中，T s为所述多载波信号的一个完整符号长度，Δt为接收设备的包络检测电路响应时间。
优选地，通过所述方式二调节多载波信号幅度的步骤，进一步包含：若T cp＞Δt，则将多载波信号的数据帧的循环前缀的长度截短为T cp-Δt；其中，T cp为所述多载波信号的数据帧的循环前缀的长度，Δt为接收设备的包络检测响应时间。
优选地，通过所述方式三调节多载波信号幅度的步骤，进一步包含：在所述多载波信号中，将所述第二预设符号集合的所有符号的发送功率降低为小于接收设备检测高电平时的接收功率值，或者，保持发送功率不变，将所述第二预设符号集合的所有符号携带的数据设置为空数据。
优选地，通过所述方式三调节多载波信号幅度的步骤，进一步包含：若发送设备能直接控制所述多载波信号的每个符号的时域采样，则将所述多载波信号的一个符号拆为两部分，设置一部分符号的发送功率大于P h，另一部分符号的发送功率小于P h，小于P h的时间大于Δt。若发送设备不能直接控制所述多载波信号的每个符号的时域采样，则通过近似法使得所述多载波信号在一个符号内发生幅度变化。其中，P h为接收设备检测高电平时的接收功率值，Δt为接收设备的包络检测电路响应时间。
进一步地，通过所述多载波开关键控信号中周期性低幅度或高幅度信号的位置来携带同步参考信号。
本申请第一方面任意一项实施例所述方法，用于网络设备，包含以下步骤：发送所述多载波开关键控信号。
本申请第一方面任意一项实施例所述方法，用于发送终端设备，包含以下步骤：发送所述多载波开关键控信号。
本申请第一方面任意一项实施例所述方法，用于接收终端设备，包含以下步骤：
接收所述多载波开关键控信号，检测高幅度或低幅度信号；通过统计所述多载波开关键控信号的高幅度或低幅度信号的持续时间或位置来解调控制信息。
第二方面，本申请还提出一种无线通信控制信息传输网络设备，用本申请第一方面任意一项所述方法，所述无线通信控制信息传输网络设备中至少一个模块，用于以下至少一项功能：用于接收设备的接收信号强度、检测灵敏度、电路硬件结构和电路硬件响应中的至少一项信息；用于根据预先设计的准则选 择调节多载波信号幅度的方式；用于发送所述多载波开关键控信号。
第三方面，本申请还提出无线通信控制信息传输终端设备，用本申请第一方面任意一项所述方法，所述无线通信控制信息传输终端设备中至少一个模块，用于以下至少一项功能：用于接收设备的接收信号强度、检测灵敏度、电路硬件结构和电路硬件响应中的至少一项信息；用于根据预先设计的准则选择调节多载波信号幅度的方式；用于发送所述多载波开关键控信号。
第四方面，本申请还提出无线通信控制信息传输终端设备，用本申请第一方面任意一项所述方法，所述无线通信控制信息传输终端设备中至少一个模块，用于以下至少一项功能：所述无线通信控制信息传输终端设备中至少一个模块，用于以下至少一项功能：用于接收所述多载波开关键控信号；用于根据检测的所述多载波开关键控信号的高幅度或低幅度信号的持续时间或位置来解调控制信息；用于发送接收设备的信号强度、检测灵敏度和电路硬件响应中的至少一项信息。
本申请还提出一种通信设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如本申请第一方面任意一项实施例所述方法的步骤。
本申请还提出一种计算机可读介质，所述计算机可读介质上存储计算机程序，所述计算机程序被处理器执行时实现如本申请第一方面任意一项实施例所述的方法的步骤。
本申请还提出一种移动通信系统，包含至少一个如本申请任意一实施例所述的网络设备和/或至少一个如本申请任意一项实施例所述的终端设备。
本申请实施例采用的上述至少一个技术方案能够达到以下有益效果：
本发明可以向低功耗设备可靠地发送信息，并且可以兼容多载波系统，不需要更改已有系统的硬件结构；此外，本发明充分考虑了多载波的传输特性和低功耗终端的电路检测能力，可以有效降低信令传输的开销，并保障了设备低功耗的特性。
附图说明
图1(a)为本申请方法的实施例流程图；
图1(b)为本申请方法的实施例的多载波开关键控信号第一帧结构示意 图；
图1(c)为本申请方法的实施例的多载波开关键控信号第二帧结构示意图；
图1(d)为本申请方法的实施例的多载波开关键控信号第三帧结构示意图；
图1(e)为本申请方法的实施例的多载波开关键控信号第四帧结构示意图；
图2为本申请的方法用于网络设备的实施例流程图；
图3为本申请的方法用于终端设备的实施例流程图；
图4(a)是本申请方法另一实施例的应用场景示意图；
图4(b)是本申请方法另一实施例的多载波开关键控信号时域示意图；
图5为网络设备实施例示意图；
图6是终端设备的实施例示意图；
图7为本发明另一实施例的网络设备的结构示意图；
图8是本发明另一个实施例的终端设备的框图。
具体实施方式
以下结合附图，详细说明本申请各实施例提供的技术方案。
图1(a)为本申请方法的实施例流程图；图1(b)～(e)为本申请方法的实施例的多载波开关键控信号帧结构示意图。
本申请提出无线通信控制信息传输方法，包含以下步骤101～102：
步骤101、调节多载波信号幅度生成多载波开关键控信号。
在步骤101中，发送设备向接收设备发送所述多载波开关键控信号，发送设备可以是网络设备或终端设备，接收设备可以是终端设备。需说明的是，接收设备可以是一个设备或一组设备。
在步骤101中，在预设时间内所述多载波开关键控信号的幅度呈现高低变化，优选地，高幅度信号的平均功率至少为低幅度信号的平均功率的2倍。
需要说明的是，本发明中幅度指电平幅度，高幅度信号即为高电平信号，低幅度信号即为低电平信号。
需要说明的是，将在图4(a)和图4(b)对应的实施例对所述多载波开 关键控信号的特征详细介绍，这里不赘述。
优选地，所述多载波信号是蜂窝移动通信网络中的物理信号。需要说明的是，本发明方法尤其适用于蜂窝移动通信网络。
在步骤101中，所述调节多载波信号幅度的方式为以下方式一～方式四中的至少一种：
方式一、通过控制所述多载波信号的数据帧中第一预设符号集合的幅度，生成所述多载波开关键控信号。
在方式一中，可以通过将多载波开关键控信号中某些特定符号的幅度设置为0来生成多载波开关键控信号。
在方式一中，所述第一预设符号集合为预先设定的包含在所述多载波信号中的一个或多个完整符号；控制第一预设符号集合的幅度是指将第一预设符号集合中的所有符号携带的数据设置为高电平或低电平。需要说明的是，低电平可以指信号幅度为0。
图1(b)提供了一种方式一的实现方式，具体地：
在图1(b)中，所述多载波开关键控信号在时域上包含符号1、符号2、……，在频域上包含N个载波，T s为所述多载波信号的一个完整符号长度，例如一个OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号长度，Δt为接收设备的包络检测电路响应时间。
比较T s和Δt的大小，若T s＞Δt，则以一个完整的数据符号长度为单位，所述第一预设符号集合由一个或多个完整符号构成。通过控制所述第一预设符合集合的所有符号不携带数据、生成低电平信号，其他的数据符号视为高电平信号，生成所述多载波开关键控信号。
若T s≤Δt，则设置第一系数k，使得(k-1)T s≤Δt＜kT s，所述第一预设符号集合由连续k个完整符号构成，其中k为整数。通过控制所述第一预设符号集合的所有符号不携带数据、生成所述多载波开关键控信号。
不携带数据的符号或生成低电平的符号为图1(b)中的空符号。
方式二、通过截短所述多载波信号的数据帧的循环前缀的长度，生成所述多载波开关键控信号。
在方式二中，可以通过将多载波信号的符号CP(Cyclic Prefix，循环前缀)的一部分换成保护间隔0，生成多载波OOK信号。方式二不影响多载波信号 本身的信息传输。
图1(c)提供了一种方式二的实现方式，具体地：
在图1(c)中，多载波开关键控信号包含符号1～符号3，符号1包含CP和S1，符号2包含CP和S2，符号3包含CP和S3，CP为多载波信号的数据帧的循环前缀，S1为符号1未插入CP的OFDM信号，S2为符号2未插入CP的OFDM信号，S3为符号3未插入CP的OFDM信号。
T cp为所述多载波信号的数据帧的循环前缀的长度，Δt为接收设备的包络检测响应时间，比较T cp和Δt的大小：
如果T cp＞Δt，则可以将多载波信号的数据帧的循环前缀的长度截短为T cp-Δt，Δt时间内多载波信号的幅度设置为0，来生成所述多载波开关键控信号。
Δt的位置可以如图1(c)中，占据多载波信号的数据帧的循环前缀的前Δt，还可以占据多载波信号的数据帧的循环前缀的其他位置。
方式三、通过降低所述多载波信号的数据帧中第二预设符号集合的发射功率或者减少载波数，生成所述多载波开关键控信号。
在方式三中，通过将多载波信号的一部分载波数据设置为0，生成多载波OOK信号。相比方式一，方式三可以提升多载波系统的传输速率；相比方式二，方式三没有改变CP长度，使得多载波系统抗多径能力更好。
图1(d)提供了一种方式二的实现方式，具体地：
在图1(d)中，所述多载波开关键控信号在时域上包含符号1、符号2、……，在频域上包含N个载波，T s为所述多载波信号的一个完整符号长度。
假定发射机最大发射功率为P max，P h为接收设备检测高电平时的接收功率值，可以设置一些符号的发送功率小于P h，第二预设符号集合为设置的发送功率小于P h的所有符号。
或者，保持每个载波的发送功率不变，将所述第二预设符号集合的所有符号携带的数据设置为空数据，即对应载波不发送数据，并使得剩余载波总功率小于P h。
需说明的是，信号功率大于等于P h的符号可视为高电平信号；相反，信号功率小于P h的符号为低电平信号。
方式四、通过控制所述多载波信号的一个符号内的幅度变化，生成所述多 载波开关键控信号。
在方式四中，通过将多载波信号一个符号内幅度拟合成多载波OOK信号。相比方式一，方式四可以提升多载波传输速率和控制信息的速率。
图1(e)提供了一种方式四的实现方式，具体地：
在图1(e)中，多载波开关键控信号的一个幅度同时包含低电平信号和高电平信号。
若发送设备能直接控制所述多载波信号的每个符号的时域采样，则将所述多载波信号的一个符号拆为两部分，设置一部分符号的发送功率大于P h，另一部分符号的发送功率小于P h，小于P h的时间大于Δt。
若发送设备不能直接控制所述多载波信号的每个符号的时域采样，则通过近似法使得所述多载波信号在一个符号内发生幅度变化。首先，定义时域上的低电平信号持续时间和幅度大小为T l和d l，时域上高电平信号的持续时间和幅度大小分别为T h和d h。然后，假设第m个多载波的发送数据集合为{A m}，通过遍历N个载波的所有数据集合，使得在T l时间内该符号的幅值小于d l，且在T h时间内幅值大于d h。通过上述近似法使得所述多载波信号在一个符号内发生幅度变化，生成所述多载波开关键控信号。
上述方式一～方式四，可在不破坏多载波信号结构基础之上，生成多载波开关键控信号，可以根据电路的响应时间的大小、多载波符号的长度和CP的长度中的至少一项信息，来选择所述多载波开关键控信号的生成方式，还可以按预先设计的准则选择调节多载波信号幅度的方式。
所述预先设计的准则为：若接收设备的包络检测响应时间小于多载波信号的一个完整符号长度，则选择上述方式一或者方式三；若接收设备的包络检测响应时间小于多载波信号的一个完整符号长度且大于多载波信号一个完整符号的循环前缀长度，则选择上述方式四；若接收设备的包络检测响应时间小于多载波信号一个完整符号的循环前缀长度，则选择上述方式二。
需说明的是，还可通过其他方式来选择所述多载波开关键控信号的生成方式，这里不做特别限定。
在步骤101中，接收设备通过天线接收到携带控制信息的信号后，将该信号送给包络检测电路。具体地，首先将该信号送给阻抗匹配电路，然后再送入积分器，对信号进行累积，最后将累积信号送入比较器，如果累积的信号大于 预设门限，则记为高电平；否则，为低电平。最终，通过检测高电平和/或低电平信号的长短或者位置解调得到控制信息。
步骤102、所述多载波开关键控信号用于携带控制信息。
在步骤102中，所述控制信息为接收设备的控制信息，所述多载波开关键控信号携带控制信息的方式为以下至少一种。
方式一、通过所述多载波开关键控信号中高电平和/或低电平信号的长短来携带不同的所述控制信息。
通过高电平信号和/或低电平信号的长度来携带不同的控制信息，例如，可以定义低电平持续时间长度为10微秒表示信息0，低电平持续时间长度为20微秒表示信息1，信息0和信息1指的是两种不同的控制信息。
方式二、通过所述多载波开关键控信号中高电平和/或低电平信号的位置来携带不同的所述控制信息。
当多载波开关键控信号为突发信号时，通过高电平信号和/或低电平信号相对于起始点或者终止点来判断低电平信号的位置。例如，当低电平信号和起始点信号的间隔为10毫秒时，表示信息0；当低电平信号和起始点信号的间隔为200毫秒时，表示信息1。
当多载波开关键控信号为非突发信号时，可以设置两端低电平信号来携带信令。在每个符号的固定位置设置一个低电平信号，然后通过设置其他低电平的位置来携带信息，例如，当低电平信号和固定位置间隔为10毫秒时，表示信息0；当低电平信号和固定位置的间隔为200毫秒时，表示信息1。
在步骤102中，所述控制信息包含以下至少一种：同步参考信号、设备身份识别号、同步广播信号、激活信号、参数配置信息和资源配置信息。
发送设备首先获取接收设备的电路结构、接收信号强度RSSI、比较器判定接收信号为低电平时的接收功率，然后计算接收设备的接收灵敏度及电路对阶跃信号的响应时间，以上参数可用于优化多载波开关键控信号的生成。
在步骤102中，可通过所述多载波开关键控信号中周期性低电平或高电平信号的位置来携带同步参考信号。可以将低电平信号或高电平信号设置为周期性信号，例如每隔10ms发送一个低电平信号或高电平信号，用作接收设备的同步信号。
优选地，通过在LTE和5G系统中的PBCH(Physical Broadcasting Channel， 物理广播信道)信号中周期性地发送低电平信号或高电平信号，用作接收设备的同步信号。
本发明实施例提供一种无线通信控制信息传输方法，解决现有方法主要用于终端的激活，不能用于控制信息传输的问题；并且，本发明方法可兼容现有的多载波无线系统。本发明方法利用了多载波的特性生成多载波OOK信号，不影响多载波的信号结构和现有的传输协议，可以直接应用于现有的多载波系统。此外，本发明使用低电平信号的长短或者低电平信号的位置携带信号，不需要冗长的前导。
图2为本申请的方法用于网络设备的实施例流程图。
本申请第一方面任意一项实施例所述方法，用于网络设备，包含以下步骤201～202：
步骤201、获取接收设备的信号强度、检测灵敏度和电路硬件响应中的至少一项信息。
需要说明的是，步骤201为本发明实施例可选步骤。
在步骤201中，网络设备可根据接收设备的电路结构、接收信号强度RSSI和比较器，判定接收信号为低电平时的接收功率，然后计算接收设备的接收灵敏度及电路对阶跃信号的响应时间。
网络设备可根据电路对阶跃信号的响应时间的大小、多载波开关键控信号的符号长度、CP的长度，来选择多载波开关键控信号生成方式。
步骤202、发送所述多载波开关键控信号。
图3为本申请的方法用于终端设备的实施例流程图。
本申请第一方面任意一项实施例所述方法，用于接收终端设备，包含以下步骤：
步骤301、接收所述多载波开关键控信号，检测高电平或低电平信号。
在步骤301中，在接收终端设备上，通过天线接收到携带控制信息的信号后，将该信号送给包络检测电路。包络检测电路移除信号的载波频率，并将移除载波频率的包络信号送至比较器，然后对信号的高低电平进行检测。
步骤302、通过统计所述多载波开关键控信号的高电平或低电平信号的持续时间或位置来解调控制信息。
在步骤302中，接收终端设备通过计数器识别高电平信号和/或低电平信 号的持续时间长度，以及高电平信号或低电平信号的位置。
当发送设备使用持续时间长度携带信息时，通过计数低电平的长度，来解调控制信息；当发送设备使用低电平位置携带信息时，首先计算信号的起始位置，然后一直计数，直到出现高电平，并记录该计数周期，然后通过该计数周期解调出控制信息。
当使用低电平信号的位置携带信息时，首先找到标记信号的位置，然后开始计时，直到出现低电平信号，通过统计低电平信号到标记位置的时间长度，解调出携带的控制信息。
图4(a)是本申请方法另一实施例的应用场景示意图，图4(b)是本申请方法另一实施例的多载波开关键控信号时域示意图。
图4(a)中，第一设备向第二设备发送多载波开关键控信号，所述多载波开关键控信号用于携带控制信息，第一设备向第三设备发送携带数据信息的信令。
也就是说，第一设备通过所述多载波开关键控信号向第二设备发送控制信息。其中，第一设备具备发送多载波信号的能力，第二设备具备信号接收、包络检测和信号比较等能力。
第一设备可以是网络设备或终端设备，第二设备和第三设备可以均为终端设备。
在图4(a)中，第二设备为低功耗终端设备，无法解析第一设备发送的携带数据信息的信令，第二设备可以通过接收和解析所述多载波开关键控信号，获取控制信息的内容，从而实现信令交互。
本发明实施例第一设备分别向第二设备和第三设备发送携带控制信息的信令和携带数据信息的信令，是为了说明，本发明方法可兼容现有多载波无线通信系统，且适用于低损耗终端信息传输。
需要说明的是，第一设备还可以同时向第三设备发送所述多载波开关键控信号和携带数据信息的信令。第三设备根据相应协议解析获取相应信息。
需说明的是，第一设备可同时或不同时向第二设备和第三设备发送携带控制信息的信令和携带数据信息的信令。
图4(b)描述了所述多载波开关键控信号的特征，为时域特征。
在图4(b)中，在预设时间内所述多载波开关键控信号的幅度呈现高低 变化，且高幅度信号的平均功率至少为低幅度信号的平均功率的2倍。
优选地，所述预设时间为一个符号或者一帧数据，例如，一个符号由插入CP的OFDM信号和CP构成，如图1(c)；一帧数据由多个连续的符号构成，通常包含帧头、负载数据、帧尾。
在本发明实施例中，可以通过设定阈值区分高幅度信号和低幅度信号，且高幅度信号和低幅度信号满足：高幅度信号的平均功率至少为低幅度信号的平均功率的2倍。
优选地，所述高幅度信号为幅度大于第一阈值的多载波开关键控信号，所述低幅度信号为幅度小于第二阈值的多载波开关键控信号。需要说明的是，所述第一阈值和第二阈值为设定的幅度数值，可以相同或不同，这里不做具体限定，例如，所述第一阈值为3V，所述第二阈值为2.5V。当所述第一阈值和第二阈值相同时，幅度等于第一阈值或第二阈值的信号可以为高幅度信号或低幅度信号。
在本发明实施例中，若设定的第一阈值和第二阈值使得无法满足高幅度信号的平均功率至少为低幅度信号的平均功率的2倍，则可重新设定第一阈值和/或第二阈值。
具体来说，所述多载波开关键控信号的特征是，在一个符号或者一帧数据内多载波信号的功率呈现高低的变化。功率高的时间段内的多载波信号定义为高幅度信号，即高电平信号；功率低的时间段内的多载波信号定义为低幅度信号，即低电平信号，高幅度信号平均功率至少为低幅度信号的平均功率的两倍。
图5为网络设备实施例示意图。
本申请实施例还提出一种网络设备，使用本申请中任意一项实施例的方法，所述网络设备用于：发送多载波开关键控信号。
为实施上述技术方案，本申请提出的一种网络设备400，包含网络发送模块401、网络确定模块402、网络接收模块403。
所述网络发送模块，用于发送所述多载波开关键控信号。
所述网络确定模块，用于根据预先设计的准则选择调节多载波信号幅度的方式。
所述网络接收模块，用于接收来自接收设备的接收信号强度、检测灵敏度、电路硬件结构和包络检测电路响应中的至少一项信息。
实现所述网络发送模块、网络确定模块、网络接收模块功能的具体方法，如本申请各方法实施例所述，这里不再赘述。
图6是终端设备的实施例示意图。
本申请还提出一种终端设备，使用本申请任意一项实施例的方法，所述终端设备用于：发送多载波开关键控信号。
为实施上述技术方案，本申请提出的一种终端设备500，包含终端发送模块501、终端确定模块502、终端接收模块503。
所述终端接收模块，用于接收所述多载波开关键控信号。
所述终端确定模块，用于根据检测的所述多载波开关键控信号的高电平或低电平信号的持续时间或位置来解调控制信息。
所述终端发送模块，用于发送接收设备的信号强度、检测灵敏度、电路硬件结构和包络检测电路响应中的至少一项信息。
实现所述终端发送模块、终端确定模块、终端接收模块功能的具体方法如本申请各方法实施例所述，这里不再赘述。
本申请所述终端设备，可以指移动终端设备。
图7示出了本发明另一实施例的网络设备的结构示意图。如图所示，网络设备600包括处理器601、无线接口602、存储器603。其中，所述无线接口可以是多个组件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。所述无线接口实现和所述终端设备的通信功能，通过接收和发射装置处理无线信号，其信号所承载的数据经由内部总线结构与所述存储器或处理器相通。所述存储器603包含执行本申请任意一个实施例的计算机程序，所述计算机程序在所述处理器601上运行或改变。当所述存储器、处理器、无线接口电路通过总线系统连接。总线系统包括数据总线、电源总线、控制总线和状态信号总线，这里不再赘述。
图8是本发明另一个实施例的终端设备的框图。终端设备700包括至少一个处理器701、存储器702、用户接口703和至少一个网络接口704。终端设备700中的各个组件通过总线系统耦合在一起。总线系统用于实现这些组件之间的连接通信。总线系统包括数据总线，电源总线、控制总线和状态信号总线。
用户接口703可以包括显示器、键盘或者点击设备，例如，鼠标、轨迹球、触感板或者触摸屏等。
存储器702存储可执行模块或者数据结构。所述存储器中可存储操作系统和应用程序。其中，操作系统包含各种系统程序，例如框架层、核心库层、驱动层等，用于实现各种基础业务以及处理基于硬件的任务。应用程序包含各种应用程序，例如媒体播放器、浏览器等，用于实现各种应用业务。
在本发明实施例中，所述存储器702包含执行本申请任意一个实施例的计算机程序，所述计算机程序在所述处理器701上运行或改变。
存储器702中包含计算机可读存储介质，处理器701读取存储器702中的信息，结合其硬件完成上述方法的步骤。具体地，该计算机可读存储介质上存储有计算机程序，计算机程序被处理器701执行时实现如上述任意一个实施例所述的方法实施例的各步骤。
处理器701可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，本申请方法的各步骤可以通过处理器701中的硬件的集成逻辑电路或者软件形式的指令完成。所述处理器701可以是通用处理器、数字信号处理器、专用集成电路、现成可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。在一个典型的配置中，本申请的设备包括一个或多个处理器(CPU、FGAP、MUC中的一个)、输入/输出用户接口、网络接口和存储器。
此外，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
因此，本申请还提出一种计算机可读介质，所述计算机可读介质上存储计算机程序，所述计算机程序被处理器执行时实现本申请任意一项实施例所述的方法的步骤。例如，本发明的存储器603，702可包括计算机可读介质中的非永久性存储器，随机存取存储器(RAM)和/或非易失性内存等形式，如只读 存储器(ROM)或闪存(flash RAM)。
计算机可读介质包括永久性和非永久性、可移动和非可移动媒体可以由任何方法或技术来实现信息存储。信息可以是计算机可读指令、数据结构、程序的模块或其他数据。计算机的存储介质的例子包括，但不限于相变内存(PRAM)、静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、其他类型的随机存取存储器(RAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、快闪记忆体或其他内存技术、只读光盘只读存储器(CD-ROM)、数字多功能光盘(DVD)或其他光学存储、磁盒式磁带，磁带磁磁盘存储或其他磁性存储设备或任何其他非传输介质，可用于存储可以被计算设备访问的信息。按照本文中的界定，计算机可读介质不包括暂存电脑可读媒体(transitory media)，如调制的数据信号和载波。
基于图5～8的实施例，本申请还提出一种移动通信系统，包含至少1个本申请中任意一个终端设备的实施例和/或至少1个本申请中任意一个网络设备的实施例。
还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、商品或者设备中还存在另外的相同要素。
还需要说明的是，本申请中的“第一”、“第二”，是为了区分同一名称的多个客体，如非具体说明，没有其他特别的含义。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (23)

  1. 一种无线通信控制信息传输方法，其特征在于，包含以下步骤：
    通过调节多载波信号的幅度生成多载波开关键控信号；
    所述多载波开关键控信号用于携带控制信息，在预设时间内所述多载波开关键控信号的幅度呈现高低变化；
    所述调节多载波信号幅度的方式为以下至少一种：
    方式一、通过控制所述多载波信号的数据帧中第一预设符号集合的幅度，生成所述多载波开关键控信号；
    方式二、通过截短所述多载波信号的数据帧的循环前缀的长度，生成所述多载波开关键控信号；
    方式三、通过降低所述多载波信号的数据帧中第二预设符号集合的发射功率或者减少载波数，生成所述多载波开关键控信号；
    方式四、通过控制所述多载波信号的一个符号内的幅度变化，生成所述多载波开关键控信号。
  2. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，所述多载波信号是蜂窝移动通信网络中的物理信号。
  3. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，所述高幅度信号为幅度大于第一阈值的多载波开关键控信号，所述低幅度信号为幅度小于第二阈值的多载波开关键控信号。
  4. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，所述预设时间为一个符号或者一帧数据。
  5. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，在所述多载波开关键控信号中高幅度信号的平均功率至少为低幅度信号的平均功率的2倍。
  6. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，所述多载波开关键控信号携带控制信息的方式为以下至少一种：
    通过所述多载波开关键控信号中高幅度和/或低幅度信号的长度来携带不同的所述控制信息；
    通过所述多载波开关键控信号中高幅度和/或低幅度信号的位置来携带不同的所述控制信息。
  7. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，所述控制信息包含以下至少一种：同步参考信号、设备身份识别号、同步广播信号、激活信号、参数配置信息和资源配置信息。
  8. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，所述方法还包含：
    获取接收设备的接收信号强度、检测灵敏度、电路硬件结构和包络检测电路响应时间中的至少一项信息，用来调整所述多载波信号的幅度。
  9. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，按预先设计的准则选择调节多载波信号幅度的方式：
    若接收设备的包络检测电路响应时间小于多载波信号的一个完整符号长度，则选择所述方式一或者方式三；
    若接收设备的包络检测电路响应时间小于多载波信号的一个完整符号长度且大于多载波信号一个完整符号的循环前缀长度，则选择所述方式四；
    若接收设备的包络检测电路响应时间小于多载波信号一个完整符号的循环前缀长度，则选择所述方式二。
  10. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，通过所述方式一调节多载波信号幅度的步骤，进一步包含：
    若T s＞Δt，则所述第一预设符号集合由一个或多个完整符号构成；否则，设置第一系数k，使得(k-1)T s≤Δt＜kT s，所述第一预设符号集合由连续k个完整符号构成；
    在所述多载波信号中，将所述第一预设符号集合的所有符号携带的数据设置为低幅度信号，其他符号携带的数据设置为高幅度信号；
    其中，T s为所述多载波信号的一个完整符号长度，Δt为接收设备的包络检测电路响应时间。
  11. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，通过所述方式二调节多载波信号幅度的步骤，进一步包含：
    若T cp＞Δt，则将多载波信号的数据帧的循环前缀的长度截短为T cp-Δt；
    其中，T cp为所述多载波信号的数据帧的循环前缀的长度，Δt为接收设备的包络检测电路响应时间。
  12. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，通过所述方式三调节多载波信号幅度的步骤，进一步包含：
    在所述多载波信号中，将所述第二预设符号集合的所有符号的发送功率降低为小于接收设备检测高电平时的接收功率值，或者，保持发送功率不变，将所述第二预设符号集合的所有符号携带的数据设置为空数据。
  13. 如权利要求1所述的无线通信控制信息传输方法，其特征在于，通过所述方式三调节多载波信号幅度的步骤，进一步包含：
    若发送设备能直接控制所述多载波信号的每个符号的时域采样，则将所述多载波信号的一个符号拆为两部分，设置一部分符号的发送功率大于P h，另一部分符号的发送功率小于P h，小于P h的时间大于Δt；
    若发送设备不能直接控制所述多载波信号的每个符号的时域采样，则通过近似法使得所述多载波信号在一个符号内发生幅度变化；
    其中，P h为接收设备检测高电平时的接收功率值，Δt为接收设备的包络检测电路响应时间。
  14. 如权利要求6所述的无线通信控制信息传输方法，其特征在于，通过所述多载波开关键控信号中周期性低幅度或高幅度信号的位置来携带同步参考信号。
  15. 如权利要求1～14任意一项所述方法，用于网络设备，其特征在于，包含以下步骤：发送所述多载波开关键控信号。
  16. 如权利要求1～14任意一项所述方法，用于发送终端设备，其特征在于，包含以下步骤：发送所述多载波开关键控信号。
  17. 如权利要求1～14任意一项所述方法，用于接收终端设备，其特征在于，包含以下步骤：
    接收所述多载波开关键控信号，检测高幅度或低幅度信号；
    通过统计所述多载波开关键控信号的高幅度或低幅度信号的持续时间或位置来解调控制信息。
  18. 一种无线通信控制信息传输网络设备，用于实现权利要求1～14任意一项所述方法，其特征在于，
    所述无线通信控制信息传输网络设备中至少一个模块，用于以下至少一项功能：用于接收设备的接收信号强度、检测灵敏度、电路硬件结构和包络检测电路响应时间的至少一项信息；用于根据预先设计的准则选择调节多载波信号幅度的方式；用于发送所述多载波开关键控信号。
  19. 一种无线通信控制信息传输终端设备，用于实现权利要求1～14任意一项所述方法，其特征在于，
    所述无线通信控制信息传输终端设备中至少一个模块，用于以下至少一项功能：用于接收设备的接收信号强度、检测灵敏度、电路硬件结构和包络检测电路硬件响应中的至少一项信息；用于根据预先设计的准则选择调节多载波信号幅度的方式；用于发送所述多载波开关键控信号。
  20. 一种无线通信控制信息传输终端设备，用于实现权利要求1～14任意一项所述方法，其特征在于，
    所述无线通信控制信息传输终端设备中至少一个模块，用于以下至少一项功能：用于接收所述多载波开关键控信号；用于根据检测的所述多载波开关键 控信号的高幅度或低幅度信号的长度或位置来解调控制信息；用于发送接收设备的信号强度、检测灵敏度和包络检测电路硬件响应时间中的至少一项信息。
  21. 一种通信设备，其特征在于，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1～17中任意一项所述方法的步骤。
  22. 一种计算机可读介质，所述计算机可读介质上存储计算机程序，所述计算机程序被处理器执行时实现如权利要求1～17任意一项所述的方法的步骤。
  23. 一种移动通信系统，包含如权利要求18所述的无线通信控制信息传输网络设备、如权利要求19所述的无线通信控制信息传输终端设备和/或所述的如权利要求20所述的无线通信控制信息传输终端设备。
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