CN113938996B - Wireless communication control information transmission method and device - Google Patents

Wireless communication control information transmission method and device Download PDF

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Publication number
CN113938996B
CN113938996B CN202111064480.4A CN202111064480A CN113938996B CN 113938996 B CN113938996 B CN 113938996B CN 202111064480 A CN202111064480 A CN 202111064480A CN 113938996 B CN113938996 B CN 113938996B
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signal
amplitude
carrier
control information
multicarrier
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CN113938996A (en
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宋国超
闫志宇
江甲沫
杜滢
王志勤
魏贵明
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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Priority to PCT/CN2022/070459 priority patent/WO2023035518A1/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
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a wireless communication control information transmission method, which comprises the following steps: and adjusting the amplitude of the multi-carrier signal to generate a multi-carrier on-off keying signal, wherein the multi-carrier on-off keying signal is used for carrying control information. The manner of adjusting the amplitude of the multicarrier signal is at least one of: generating a multi-carrier on-off keying signal by controlling the amplitude of a first preset symbol set in a data frame of the multi-carrier signal; generating a multi-carrier on-off keying signal by truncating the length of the cyclic prefix of the data frame of the multi-carrier signal; generating a multi-carrier on-off keying signal by reducing the transmitting power of a second preset symbol set in a data frame of the multi-carrier signal or reducing the number of carriers; a multicarrier on-off keying signal is generated by controlling an amplitude variation within one symbol of the multicarrier signal. The application also includes an apparatus for applying the method. The method and the device solve the problem that the existing method and device are not applicable to the multi-carrier system, and are particularly applicable to the cellular wireless mobile communication system.

Description

Wireless communication control information transmission method and device
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for transmitting wireless communication control information.
Background
In many internet of things scenarios, the devices are difficult to repair after deployment, or the batteries of the devices are required to be replaced frequently at extremely high cost, so low-power wireless communication technology is required to reduce maintenance overhead of the devices. At present, a low-power consumption information transmission mode which is widely used is as follows: the transmitting device loads information onto an OOK (On-Off Keying) signal, and the receiving device demodulates the signal using an envelope detection or amplitude detection method. The existing low-power information transmission method is mainly used for a single-carrier system, and cannot be directly applied to the existing multi-carrier system, such as a cellular network and a Wi-Fi network; in addition, the existing method is mainly used for activating the low-power-consumption terminal, and a control information transmission method is not provided for the backscatter system equipment, so that the transmission efficiency is low and the performance is poor.
Disclosure of Invention
The application provides a wireless communication control information transmission method and equipment, which solve the problem that the existing method and equipment are not applicable to a multi-carrier system, and are particularly applicable to a cellular wireless mobile communication system.
In a first aspect, the present application proposes a wireless communication control information transmission method, including the steps of:
And generating a multi-carrier on-off keying signal by adjusting the amplitude of the multi-carrier on-off keying signal, wherein the multi-carrier on-off keying signal is used for carrying control information, and the amplitude of the multi-carrier on-off keying signal shows high-low variation within preset time.
The method for adjusting the amplitude of the multi-carrier signal is at least one of the following steps: in a first mode, the multi-carrier on-off keying signal is generated by controlling the amplitude of a first preset symbol set in a data frame of the multi-carrier signal. And in a second mode, generating the multi-carrier on-off keying signal by truncating the length of the cyclic prefix of the data frame of the multi-carrier signal. And thirdly, generating the multi-carrier on-off keying signal by reducing the transmitting power of a second preset symbol set in the data frame of the multi-carrier signal or reducing the carrier number. Mode four, generating the multicarrier on-off keying signal by controlling amplitude variation within one symbol of the multicarrier signal
Preferably, the multi-carrier signal is a physical signal in a cellular mobile communications network.
Preferably, the high-amplitude signal is a multicarrier on-off keying signal with an amplitude greater than a first threshold value, and the low-amplitude signal is a multicarrier on-off keying signal with an amplitude less than a second threshold value.
Preferably, the preset time is one symbol or one frame of data.
Preferably, the average power of the high amplitude signal in the multi-carrier on-off keying signal is at least 2 times the average power of the low amplitude signal.
Preferably, the manner in which the multicarrier on-off keying signal carries control information is at least one of the following: and carrying different control information by the length of a high-amplitude signal and/or a low-amplitude signal in the multi-carrier on-off keying signal. And carrying different control information by the positions of high-amplitude and/or low-amplitude signals in the multi-carrier on-off keying signal.
Further, the control information includes at least one of: a synchronization reference signal, a device identification number (ID), a synchronization broadcast signal, an activation signal, parameter configuration information, and resource configuration information.
Further, the method further comprises: at least one of the received signal strength, the detection sensitivity, the circuit hardware structure and the envelope detection circuit response of the receiving device is obtained for adjusting the amplitude of the multi-carrier signal.
Further, the manner of adjusting the amplitude of the multicarrier signal is selected according to a predesigned criterion: if the envelope detection response time of the receiving device is less than one full symbol length of the multi-carrier signal, then either mode one or mode three is selected. And if the envelope detection response time of the receiving device is smaller than one complete symbol length of the multi-carrier signal and larger than the cyclic prefix length of one complete symbol of the multi-carrier signal, selecting the mode IV. And if the envelope detection response time of the receiving device is smaller than the cyclic prefix length of one complete symbol of the multi-carrier signal, selecting the second mode.
Preferably, the step of adjusting the amplitude of the multicarrier signal according to the method further comprises: if T s >Δt, the first preset symbol set is composed of one or more complete symbols; otherwise, the first coefficient k is set such that (k-1) T s ≤Δt<kT s The first set of preset symbols consists of consecutive k complete symbols. And in the multi-carrier signal, setting the data carried by all symbols of the first preset symbol set as low-amplitude signals and setting the data carried by other symbols as high-amplitude signals. Wherein T is s For one complete symbol length of the multi-carrier signal Δt is the envelope detection circuit response time of the receiving device.
Preferably, the step of adjusting the amplitude of the multicarrier signal by the method further comprisesThe method comprises the following steps: if T cp >Δt, truncating the length of the cyclic prefix of the data frame of the multicarrier signal to T cp - Δt; wherein T is cp For the length of the cyclic prefix of the data frame of the multi-carrier signal, Δt is the envelope detection response time of the receiving device.
Preferably, the step of three-adjusting the amplitude of the multicarrier signal in the manner described further comprises: in the multi-carrier signal, the transmitting power of all the symbols of the second preset symbol set is reduced to be smaller than the receiving power value when the receiving device detects the high level, or the transmitting power is kept unchanged, and the data carried by all the symbols of the second preset symbol set is set as null data.
Preferably, the step of three-adjusting the amplitude of the multicarrier signal in the manner described further comprises: if the transmitting device can directly control the time domain sampling of each symbol of the multi-carrier signal, dividing one symbol of the multi-carrier signal into two parts, and setting the transmitting power of one part of symbols to be larger than P h The transmission power of another part of symbols is smaller than P h Less than P h Is greater than deltat. If the transmitting device cannot directly control the time-domain sampling of each symbol of the multi-carrier signal, the multi-carrier signal is caused to vary in amplitude within one symbol by approximation. Wherein P is h For a receiving device to detect a reception power value at a high level, Δt is the envelope detection circuit response time of the receiving device.
Further, the synchronization reference signal is carried by the position of a periodic low-amplitude or high-amplitude signal in the multi-carrier on-off keying signal.
The method according to any one of the embodiments of the first aspect of the present application, for a network device, includes the following steps: and transmitting the multi-carrier on-off keying signal.
The method for transmitting the terminal equipment according to any one embodiment of the first aspect of the present application includes the following steps: and transmitting the multi-carrier on-off keying signal.
The method for receiving the terminal device according to any one of the embodiments of the first aspect of the present application includes the following steps:
receiving the multi-carrier on-off keying signal, and detecting a high-amplitude or low-amplitude signal; the control information is demodulated by counting the duration or position of the high-amplitude or low-amplitude signal of the multicarrier on-off keying signal.
In a second aspect, the present application further proposes a wireless communication control information transmission network device, with the method according to any one of the first aspects of the present application, at least one module in the wireless communication control information transmission network device is configured to at least one of the following functions: at least one of information for a received signal strength, a detection sensitivity, a circuit hardware structure, and a circuit hardware response of the receiving device; means for selecting a means for adjusting the amplitude of the multicarrier signal according to a pre-designed criterion; for transmitting said multicarrier on-off keying signal.
In a third aspect, the present application further proposes a wireless communication control information transmission terminal device, with the method according to any one of the first aspects of the present application, where at least one module in the wireless communication control information transmission terminal device is configured to at least one of the following functions: at least one of information for a received signal strength, a detection sensitivity, a circuit hardware structure, and a circuit hardware response of the receiving device; means for selecting a means for adjusting the amplitude of the multicarrier signal according to a pre-designed criterion; for transmitting said multicarrier on-off keying signal.
In a fourth aspect, the present application further proposes a wireless communication control information transmission terminal device, with the method according to any one of the first aspects of the present application, where at least one module in the wireless communication control information transmission terminal device is configured to 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 multicarrier on-off keying signal; for demodulating control information in dependence on the duration or position of the detected high-amplitude or low-amplitude signal of the multicarrier on-off keying signal; for transmitting at least one of signal strength, detection sensitivity and circuit hardware response of the receiving device.
The application also proposes a communication device comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method according to any one of the embodiments of the first aspect of the present application.
The present application also proposes a computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any one of the embodiments of the first aspect of the present application.
The application also proposes a mobile communication system comprising at least one network device as described in any embodiment of the application and/or at least one terminal device as described in any embodiment of the application.
The above-mentioned at least one technical scheme that this application embodiment adopted can reach following beneficial effect:
the invention can reliably send information to the low-power consumption equipment, is compatible with a multi-carrier system, and does not need to change the hardware structure of the existing system; in addition, the invention fully considers the transmission characteristic of multi-carrier and the circuit detection capability of the low-power consumption terminal, can effectively reduce the expenditure of signaling transmission and ensures the characteristic of low power consumption of the equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 (a) is a flow chart of an embodiment of the method of the present application;
fig. 1 (b) is a schematic diagram of a first frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application;
fig. 1 (c) is a schematic diagram of a second frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application;
Fig. 1 (d) is a schematic diagram of a third frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application;
fig. 1 (e) is a schematic diagram of a fourth frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application;
FIG. 2 is a flow chart of an embodiment of a method of the present application for a network device;
fig. 3 is a flowchart of an embodiment of a method for a terminal device according to the present application;
FIG. 4 (a) is a schematic diagram of an application scenario according to another embodiment of the method of the present application;
fig. 4 (b) is a schematic diagram of a multicarrier on-off keying signal according to 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.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 (a) is a flow chart of an embodiment of the method of the present application; is a flow chart of an embodiment of the method of the present application; fig. 1 (b) is a schematic diagram of a first frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application; fig. 1 (c) is a schematic diagram of a second frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application; fig. 1 (d) is a schematic diagram of a third frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application; fig. 1 (e) is a schematic diagram of a fourth frame structure of a multicarrier on-off keying signal according to an embodiment of the method of the present application.
The application provides a wireless communication control information transmission method, which comprises the following steps 101-102:
and step 101, adjusting the amplitude of the multi-carrier signal to generate a multi-carrier on-off keying signal.
In step 101, the transmitting device sends the multicarrier on-off keying signal to the receiving device, where the transmitting 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.
In step 101, the amplitude of the multicarrier on-off keying signal exhibits a change in level within a preset time, and preferably, the average power of the high-amplitude signal is at least 2 times that of the low-amplitude signal.
In the present invention, the amplitude refers to a level amplitude, the high-amplitude signal is a high-level signal, and the low-amplitude signal is a low-level signal.
It should be noted that the features of the multi-carrier on-off keying signal will be described in detail in the embodiments corresponding to fig. 4 (a) and fig. 4 (b), which are not repeated here.
Preferably, the multi-carrier signal is a physical signal in a cellular mobile communications network. It should be noted that the method of the present invention is particularly applicable to cellular mobile communication networks.
In step 101, the manner of adjusting the amplitude of the multicarrier signal is at least one of the following manners one to four:
in a first mode, the multi-carrier on-off keying signal is generated by controlling the amplitude of a first preset symbol set in a data frame of the multi-carrier signal.
In the first mode, the multicarrier on-off keying signal may be generated by setting the amplitude of some specific symbols in the multicarrier on-off keying signal to 0.
In a first aspect, the first preset symbol set is one or more preset complete symbols included in the multi-carrier signal; controlling the amplitude of the first preset symbol set refers to setting the data carried by all symbols in the first preset symbol set to a high level or a low level. Note that, the low level may refer to a signal amplitude of 0.
Fig. 1 (b) provides an implementation of one mode, specifically:
in fig. 1 (b), the multicarrier on-off keying signal comprises symbol 1, symbol 2, … … in the time domain and N carriers, T in the frequency domain s For a complete symbol length of the multi-carrier signal, e.g. an OFDM (Orthogonal Frequency Division Multiplexing ) symbol length, Δt is the envelope detection circuit response time of the receiving device.
Comparison T s And the magnitude of Δt, if T s >Δt, taking a complete data symbol length as a unit, wherein the first preset symbol set is composed of one or more complete symbols. And generating the multi-carrier on-off keying signal by controlling all symbols of the first preset coincidence set to carry no data and generating a low-level signal, wherein other data symbols are regarded as high-level signals.
If T s Setting a first coefficient k such that (k-1) T s ≤Δt<kT s The first set of preset symbols consists of consecutive k complete symbols, where k is an integer. And generating the multi-carrier on-off keying signal by controlling all symbols of the first preset symbol set to carry no data.
The symbol that does not carry data or that generates a low level is a null symbol in fig. 1 (b).
And in a second mode, generating the multi-carrier on-off keying signal by truncating the length of the cyclic prefix of the data frame of the multi-carrier signal.
In the second embodiment, the multicarrier OOK signal can be generated by replacing a part of a symbol CP (Cyclic Prefix) of the multicarrier signal with a guard interval 0. The second mode does not affect the information transmission of the multi-carrier signal.
Fig. 1 (c) provides a mode two implementation, specifically:
in fig. 1 (c), the multicarrier on-off keying signal comprises symbols 1 to 3, symbol 1 comprises CP and S1, symbol 2 comprises CP and S2, symbol 3 comprises CP and S3, CP is a cyclic prefix of a data frame of the multicarrier signal, S1 is an OFDM signal in which no CP is inserted into symbol 1, S2 is an OFDM signal in which no CP is inserted into symbol 2, and S3 is an OFDM signal in which no CP is inserted into symbol 3.
T cp For the length of the cyclic prefix of the data frame of the multi-carrier signal, Δt is the envelope detection response time of the receiving device, and T is compared cp And Δt size:
if T cp >Δt, the cyclic prefix length of the data frame of the multicarrier signal can be truncated to T cp -the amplitude of the multicarrier signal is set to 0 for Δt time to generate said multicarrier on-off keying signal.
The position of Δt may be as in fig. 1 (c), occupying the front Δt of the cyclic prefix of the data frame of the multi-carrier signal, and may also occupy other positions of the cyclic prefix of the data frame of the multi-carrier signal.
And thirdly, generating the multi-carrier on-off keying signal by reducing the transmitting power of a second preset symbol set in the data frame of the multi-carrier signal or reducing the carrier number.
In the third aspect, a multicarrier OOK signal is generated by setting a part of carrier data of a multicarrier signal to 0. Compared with the first mode, the third mode can improve the transmission rate of the multi-carrier system; compared with the second mode, the third mode does not change the CP length, so that the multi-carrier system has better multi-path resistance.
Fig. 1 (d) provides a mode two implementation, specifically:
in fig. 1 (d), the multicarrier on-off keying signal comprises symbol 1, symbol 2, … … in the time domain and N carriers, T in the frequency domain s For one complete symbol length of the multi-carrier signal.
Assuming that the maximum transmission power of the transmitter is P max ，P h For the receiving device to detect the reception power value at high level, it is possible to set the transmission power of some symbols to be smaller than P h The second preset symbol set is that the set transmitting power is smaller than P h Is a symbol of the code pattern.
Or, keeping the transmission power of each carrier unchanged, and setting the second preset symbolThe data carried by all symbols of the set are set as null data, i.e. the corresponding carrier does not transmit data, and the total power of the remaining carriers is smaller than P h 。
It should be noted that the signal power is equal to or higher than P h The sign of (2) may be considered as a high level signal; conversely, the signal power is less than P h The sign of (2) is a low level signal.
And fourth, generating the multi-carrier on-off keying signal by controlling amplitude variation in one symbol of the multi-carrier signal.
In the four modes, the multi-carrier OOK signal is synthesized by amplitude fitting the multi-carrier signal within one symbol. Compared with the first mode, the fourth mode can improve the multicarrier transmission rate and the rate of control information.
Fig. 1 (e) provides an implementation of one way four, specifically:
in fig. 1 (e), one amplitude of the multicarrier on-off keying signal contains both a low level signal and a high level signal.
If the transmitting device can directly control the time domain sampling of each symbol of the multi-carrier signal, dividing one symbol of the multi-carrier signal into two parts, and setting the transmitting power of one part of symbols to be larger than P h The transmission power of another part of symbols is smaller than P h Less than P h Is greater than deltat.
If the transmitting device cannot directly control the time-domain sampling of each symbol of the multi-carrier signal, the multi-carrier signal is caused to vary in amplitude within one symbol by approximation. First, define the duration and amplitude of the low-level signal in the time domain as T l And d l The duration and amplitude of the high level signal in the time domain are respectively T h And d h . Then, assume that the transmission data set of the mth multicarrier is { A } m By traversing all data sets of N carriers such that at T l The amplitude of the symbol is less than d in time l And at T h Amplitude is greater than d in time h . The multi-carrier signal is subjected to amplitude variation in one symbol by the approximation method to generate the multi-carrier switchA key control signal.
The first to fourth modes can generate a multi-carrier on-off keying signal on the basis of not damaging the multi-carrier signal structure, can select a generation mode of the multi-carrier on-off keying signal according to at least one of the size of response time of a circuit, the length of a multi-carrier symbol and the length of a CP, and can select a mode for adjusting the amplitude of the multi-carrier signal according to a predesigned criterion.
The pre-designed criteria are: if the envelope detection response time of the receiving device is smaller than a complete symbol length of the multi-carrier signal, selecting the first mode or the third mode; if the envelope detection response time of the receiving device is smaller than one complete symbol length of the multi-carrier signal and larger than the cyclic prefix length of one complete symbol of the multi-carrier signal, selecting the fourth mode; if the envelope detection response time of the receiving device is smaller than the cyclic prefix length of one complete symbol of the multicarrier signal, the second mode is selected.
The generation method of the multicarrier on-off keying signal may be selected by other methods, which are not particularly limited herein.
In step 101, the receiving device receives a signal carrying control information via an antenna and sends the signal to an envelope detection circuit. Specifically, the signal is sent to an impedance matching circuit, then sent to an integrator, the signal is accumulated, finally the accumulated signal is sent to a comparator, and if the accumulated signal is larger than a preset threshold, the accumulated signal is recorded as high level; otherwise, it is low. Finally, the control information is obtained by detecting the length or position of the high level and/or low level signals and demodulating the signals.
Step 102, the multi-carrier on-off keying signal is used for carrying control information.
In step 102, the control information is control information of the receiving device, and the manner in which the multicarrier on-off keying signal carries the control information is at least one of the following.
In the first mode, different control information is carried by the length of a high level signal and/or a low level signal in the multi-carrier on-off keying signal.
Different control information is carried by the length of the high level signal and/or the low level signal, for example, it may be defined that the low level duration length is 10 microseconds representing information 0 and the low level duration length is 20 microseconds representing information 1, information 0 and information 1 referring to two different control information.
And carrying different control information by the positions of high-level signals and low-level signals in the multi-carrier on-off keying signals.
When the multicarrier on-off keying signal is a burst signal, the position of the low level signal is judged by the high level signal and/or the low level signal relative to the starting point or the ending point. For example, when the interval between the low level signal and the start point signal is 10 milliseconds, information 0 is represented; when the interval between the low level signal and the start point signal is 200 ms, information 1 is represented.
When the multicarrier on-off keying signal is a non-bursty signal, the two-terminal low-level signal may be set to carry signaling. Setting a low level signal at a fixed position of each symbol, and then carrying information by setting other low level positions, for example, when the low level signal and the fixed position are spaced by 10ms, information 0 is represented; when the interval between the low level signal and the fixed position is 200 ms, information 1 is indicated.
In step 102, the control information includes at least one of: a synchronization reference signal, a device identity number, a synchronization broadcast signal, an activation signal, parameter configuration information, and resource configuration information.
The transmitting device firstly acquires the circuit structure of the receiving device, the received signal strength RSSI and the received power when the comparator judges that the received signal is at a low level, then calculates the receiving sensitivity of the receiving device and the response time of the circuit to the step signal, and the parameters can be used for optimizing the generation of the multi-carrier on-off keying signal.
In step 102, a synchronization reference signal may be carried by the position of a periodic low or high signal in the multicarrier on-off keying signal. The low level signal or the high level signal may be set as a periodic signal, for example, one low level signal or one high level signal is transmitted every 10ms, and used as a synchronization signal of the receiving apparatus.
Preferably, the low level signal or the high level signal is periodically transmitted by the PBCH (Physical Broadcasting Channel, physical broadcast channel) signal in the LTE and 5G systems, and is used as a synchronization signal of the receiving device.
The embodiment of the invention provides a wireless communication control information transmission method, which solves the problems that the prior method is mainly used for activating a terminal and can not be used for controlling information transmission; moreover, the method of the invention can be compatible with the existing multi-carrier wireless system. The method of the invention generates the multi-carrier OOK signal by utilizing the characteristics of the multi-carrier, does not influence the signal structure of the multi-carrier and the existing transmission protocol, and can be directly applied to the existing multi-carrier system. In addition, the present invention uses the length of the low level signal or the position carrying signal of the low level signal, and does not need lengthy preamble.
Fig. 2 is a flowchart of an embodiment of a method of the present application for a network device.
The method according to any one of the embodiments of the first aspect of the present application, for a network device, includes the following steps 201 to 202:
step 201, at least one of information of signal intensity, detection sensitivity and circuit hardware response of the receiving device is obtained.
It should be noted that step 201 is an optional step in the embodiment of the present invention.
In step 201, the network device may 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 selects 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, the multi-carrier on-off keying signal is sent.
Fig. 3 is a flowchart of an embodiment of a method for a terminal device according to the present application.
The method for receiving the terminal device according to any one of the embodiments of the first aspect of the present application includes the following steps:
step 301, receiving the multi-carrier on-off keying signal, and detecting a high level or low level signal.
In step 301, after receiving a signal carrying control information via an antenna at a receiving terminal device, the signal is sent to an envelope detection circuit. The envelope detection circuit removes the carrier frequency of the signal, sends the envelope signal with the carrier frequency removed to the comparator, and then detects the high level and the low level of the signal.
Step 302, demodulating control information by counting the duration or position of a high level or low level signal of the multi-carrier on-off keying signal.
In step 302, the receiving terminal device identifies the duration of the high level signal and/or the low level signal and the location of the high level signal or the low level signal by means of a counter.
Demodulating control information by counting the length of a low level when the transmitting apparatus carries information using the duration length; when the transmitting apparatus carries information using the low level position, the start position of the signal is first calculated, then counted until the high level occurs, and the count period is recorded, and then the control information is demodulated by the count period.
When the position of the low level signal is used for carrying information, the position of the mark signal is found first, then timing is started until the low level signal appears, and the carried control information is demodulated by counting the time length from the low level signal to the mark position.
Fig. 4 (a) is a schematic diagram of an application scenario of another embodiment of the method of the present application, and fig. 4 (b) is a schematic diagram of a time domain of a multicarrier on-off keying signal of another embodiment of the method of the present application.
In fig. 4 (a), the first device sends a multicarrier on-off keying signal to the second device, where the multicarrier on-off keying signal is used to carry control information, and the first device sends signaling carrying data information to the third device.
That is, the first device transmits control information to the second device through the multi-carrier on-off keying signal. Wherein the first device has the capability of transmitting a multi-carrier signal and the second device has the capabilities of signal reception, envelope detection, signal comparison, etc.
The first device may be a network device or a terminal device, and the second device and the third device may be terminal devices.
In fig. 4 (a), the second device is a low-power terminal device, and cannot parse the signaling carrying the data information sent by the first device, and the second device may obtain the content of the control information by receiving and parsing the multi-carrier on-off keying signal, so as to implement signaling interaction.
The first device in the embodiment of the invention sends the signaling carrying the control information and the signaling carrying the data information to the second device and the third device respectively, which are for illustration, the method of the invention can be compatible with the existing multi-carrier wireless communication system and is suitable for low-loss terminal information transmission.
It should be noted that, the first device may also send the multicarrier on-off keying signal and the signaling carrying the data information to the third device at the same time. And the third equipment analyzes and acquires corresponding information according to the corresponding protocol.
It should be noted that, the first device may send the signaling carrying the control information and the signaling carrying the data information to the second device and the third device simultaneously or not simultaneously.
Fig. 4 (b) depicts the characteristics of the multicarrier on-off keying signal as a time domain characteristic.
In fig. 4 (b), the amplitude of the multicarrier on-off keying signal shows a high-low variation in a preset time, and the average power of the high-amplitude signal is at least 2 times that of the low-amplitude signal.
Preferably, the preset time is one symbol or one frame of data, for example, one symbol is composed of an OFDM signal in which a CP is inserted and the CP, as shown in fig. 1 (c); a frame of data is made up of a number of consecutive symbols, typically including a frame header, payload data, and a frame trailer.
In the embodiment of the invention, the high-amplitude signal and the low-amplitude signal can be distinguished by setting the threshold value, and the high-amplitude signal and the low-amplitude signal satisfy the following conditions: the average power of the high amplitude signal is at least 2 times the average power of the low amplitude signal.
Preferably, the high-amplitude signal is a multicarrier on-off keying signal with an amplitude greater than a first threshold value, and the low-amplitude signal is a multicarrier on-off keying signal with an amplitude less than a second threshold value. The first threshold value and the second threshold value may be the same or different, and are not particularly limited herein, and for example, the first threshold value is 3V and the second threshold value is 2.5V. When the first threshold value and the second threshold value are the same, the signal with the amplitude equal to the first threshold value or the second threshold value can be a high-amplitude signal or a low-amplitude signal.
In the embodiment of the present invention, if the set first threshold and second threshold cannot satisfy that the average power of the high-amplitude signal is at least 2 times that of the low-amplitude signal, the first threshold and/or the second threshold may be reset.
In particular, the multi-carrier on-off keying signal is characterized in that the power of the multi-carrier signal exhibits a change in level within one symbol or one frame of data. The multi-carrier signal in the period of high power is defined as a high-amplitude signal, i.e., a high-level signal; a multicarrier signal during a period of low power is defined as a low-amplitude signal, i.e. a low-level signal, the high-amplitude signal having an average power that is at least twice the average power of the low-amplitude signal.
Fig. 5 is a schematic diagram of an embodiment of a network device.
The embodiment of the application also provides a network device, and the network device is used for: and transmitting the multicarrier on-off keying signal.
In order to implement the above technical solution, the network device 400 provided in the present application includes a network sending module 401, a network determining module 402, and a network receiving module 403.
The network sending module is used for sending the multi-carrier on-off keying signal.
The network determining module is used for selecting a mode for adjusting the amplitude of the multi-carrier signal according to a predesigned criterion.
The network receiving module is used for receiving at least one of the information of the received signal intensity, the detection sensitivity, the circuit hardware structure and the envelope detection circuit response from the receiving equipment.
Specific methods for implementing the functions of the network sending module, the network determining module and the network receiving module are described in the embodiments of the methods of the present application, and are not described here again.
Fig. 6 is a schematic diagram of an embodiment of a terminal device.
The application also proposes a terminal device, using the method of any one of the embodiments of the application, the terminal device being configured to: and transmitting the multicarrier on-off keying signal.
In order to implement the above technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503.
The terminal receiving module is used for receiving the multicarrier on-off keying signal.
The terminal determining module is used for demodulating control information according to the duration time or the position of the detected high-level or low-level signal of the multi-carrier on-off keying signal.
The terminal sending module is used for sending at least one item of information of signal intensity, detection sensitivity, circuit hardware structure and envelope detection circuit response of the receiving equipment.
Specific methods for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module are described in the embodiments of the methods of the present application, and are not described herein.
The terminal device described in the application may refer to a mobile terminal device.
Fig. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention. As shown, the network device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein the wireless interface may be a plurality of components, i.e. comprising a transmitter and a receiver, providing a means for communicating with various other apparatuses over a transmission medium. The wireless interface performs the communication function with the terminal device, and processes wireless signals through the receiving and transmitting device, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 603 contains a computer program for executing any of the embodiments of the present application, which computer program runs or changes on the processor 601. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described here again.
Fig. 8 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 comprises at least one processor 701, a memory 702, a user interface 703 and at least one network interface 704. The various components in terminal device 700 are coupled together by a bus system. Bus systems are used to enable connected communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.
The user interface 703 may include a display, keyboard, or pointing device, such as a mouse, trackball, touch pad, or touch screen, among others.
The memory 702 stores executable modules or data structures. The memory may store an operating system and application programs. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, etc. for implementing various application services.
In an embodiment of the present invention, the memory 702 contains a computer program that executes any of the embodiments of the present application, the computer program running or changing on the processor 701.
The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and performs the steps of the above method in combination with its hardware. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 701, implements the steps of the method embodiments as described in any of the embodiments above.
The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the methods of the present application may be performed by integrated logic circuitry in hardware or instructions in software in processor 701. 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, a discrete hardware component. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. In one typical configuration, the device of the present application includes one or more processors (one of CPU, FGAP, MUC), an input/output user interface, a network interface, and memory.
Furthermore, 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, and the like) having computer-usable program code embodied therein.
Accordingly, the present application also proposes a computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any of the embodiments of the present application. For example, the memory 603, 702 of the present invention may include non-volatile memory in a computer-readable medium, random Access Memory (RAM) and/or non-volatile memory, etc., such as read-only memory (ROM) or flash RAM.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer 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 Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
Based on the embodiments of fig. 5 to 8, the present application also proposes a mobile communication system comprising at least 1 embodiment of any one of the terminal devices of the present application and/or at least 1 embodiment of any one of the network devices of the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The terms "first" and "second" in the present application are used to distinguish between a plurality of objects having the same name, and unless otherwise specified, do not have any particular meaning.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (22)

1. A wireless communication control information transmission method, comprising the steps of:
Generating a multi-carrier on-off keying signal by adjusting the amplitude of the multi-carrier signal;
the multi-carrier on-off keying signal is used for carrying control information, and the amplitude of the multi-carrier on-off keying signal shows high-low variation in preset time;
the method for adjusting the amplitude of the multi-carrier signal is at least one of the following steps:
the first mode is that the multi-carrier on-off keying signal is generated by controlling the amplitude of a first preset symbol set in a data frame of the multi-carrier signal;
a second mode is to generate the multi-carrier on-off keying signal by truncating the length of the cyclic prefix of the data frame of the multi-carrier signal;
a third mode is to generate the multi-carrier on-off keying signal by reducing the transmitting power of a second preset symbol set in a data frame of the multi-carrier signal or reducing the number of carriers;
a fourth mode is to generate the multicarrier on-off keying signal by controlling amplitude variation in one symbol of the multicarrier signal;
the mode of carrying control information by the multi-carrier on-off keying signal is at least one of the following:
carrying different control information by the length of a high-amplitude signal and/or a low-amplitude signal in the multi-carrier on-off keying signal;
And carrying different control information by the positions of high-amplitude and/or low-amplitude signals in the multi-carrier on-off keying signal.
2. The wireless communication control information transmission method of claim 1, wherein the multi-carrier signal is a physical signal in a cellular mobile communication network.
3. The method for transmitting wireless communication control information according to claim 1, wherein the high-amplitude signal in the multicarrier on-off keying signal is a multicarrier on-off keying signal with an amplitude greater than a first threshold value, and the low-amplitude signal in the multicarrier on-off keying signal is a multicarrier on-off keying signal with an amplitude less than a second threshold value.
4. The wireless communication control information transmission method of claim 1, wherein the preset time is one symbol or one frame of data.
5. The wireless communication control information transmission method of claim 1, wherein an average power of a high-amplitude signal in the multicarrier on-off keying signal is at least 2 times an average power of a low-amplitude signal.
6. The wireless communication control information transmission method of claim 1, wherein the control information comprises at least one of: a synchronization reference signal, a device identity number, a synchronization broadcast signal, an activation signal, parameter configuration information, and resource configuration information.
7. The wireless communication control information transmission method according to claim 1, wherein the method further comprises:
at least one of the received signal strength, the detection sensitivity, the circuit hardware structure and the envelope detection circuit response time of the receiving device is acquired for adjusting the amplitude of the multi-carrier signal.
8. The wireless communication control information transmission method of claim 1, wherein the manner of adjusting the amplitude of the multicarrier signal is selected according to a pre-designed criterion:
if the response time of the envelope detection circuit of the receiving device is smaller than one complete symbol length of the multi-carrier signal, selecting the first mode or the third mode;
if the response time of the envelope detection circuit of the receiving device is smaller than the length of one complete symbol of the multi-carrier signal and larger than the cyclic prefix length of one complete symbol of the multi-carrier signal, selecting the fourth mode;
and if the response time of the envelope detection circuit of the receiving device is smaller than the cyclic prefix length of one complete symbol of the multi-carrier signal, selecting the second mode.
9. The method of wireless communication control information transmission according to claim 1, wherein the step of adjusting the amplitude of the multicarrier signal by said means further comprises:
If T s > Δt, the first set of preset symbols being constituted by one or more complete symbols; otherwise, the first coefficient k is set such that (k-1) T s ≤Δt＜kT s The first preset symbol set is composed of k continuous complete symbols;
in the multi-carrier signal, setting the data carried by all symbols of the first preset symbol set as low-amplitude signals, and setting the data carried by other symbols as high-amplitude signals;
wherein T is s For one complete symbol length of the multi-carrier signal Δt is the envelope detection circuit response time of the receiving device.
10. The wireless communication control information transmission method according to claim 1, wherein the step of adjusting the amplitude of the multicarrier signal by said second means further comprises:
if T cp To truncate the length of the cyclic prefix of the data frame of the multi-carrier signal to T cp -Δt；
Wherein T is cp For the length of the cyclic prefix of the data frame of the multi-carrier signal, Δt is the envelope detection circuit response time of the receiving device.
11. The wireless communication control information transmission method of claim 1, wherein the step of tri-adjusting the amplitude of the multicarrier signal by said means, further comprises:
In the multi-carrier signal, the transmitting power of all the symbols of the second preset symbol set is reduced to be smaller than the receiving power value when the receiving device detects the high level, or the transmitting power is kept unchanged, and the data carried by all the symbols of the second preset symbol set is set as null data.
12. The wireless communication control information transmission method of claim 1, wherein the step of tri-adjusting the amplitude of the multicarrier signal by said means, further comprises:
if the transmitting device can directly control the time domain sampling of each symbol of the multi-carrier signal, dividing one symbol of the multi-carrier signal into two parts, and setting the transmitting power of one part of symbols to be larger than P h The transmission power of another part of symbols is smaller than P h Less than P h Time greater than Δt;
if the transmitting device cannot directly control the time domain sampling of each symbol of the multi-carrier signal, the multi-carrier signal generates amplitude variation in one symbol through an approximation method;
wherein P is h For a receiving device to detect a reception power value at a high level, Δt is the envelope detection circuit response time of the receiving device.
13. The wireless communication control information transmission method of claim 1, wherein the synchronization reference signal is carried by a position of a periodic low-amplitude or high-amplitude signal in the multicarrier on-off keying signal.
14. A method according to any of claims 1-13, for a network device, comprising the steps of: and transmitting the multi-carrier on-off keying signal.
15. A method according to any of claims 1-13, for transmitting a terminal device, comprising the steps of: and transmitting the multi-carrier on-off keying signal.
16. A method according to any of claims 1-13, for receiving a terminal device, comprising the steps of:
receiving the multi-carrier on-off keying signal, and detecting a high-amplitude or low-amplitude signal;
the control information is demodulated by counting the duration or position of the high-amplitude or low-amplitude signal of the multicarrier on-off keying signal.
17. A wireless communication control information transmission network device for implementing the method of any one of claims 1-13,
at least one module in the wireless communication control information transmission network device is configured to at least one of the following functions: at least one item of information of received signal strength, detection sensitivity, circuit hardware structure and envelope detection circuit response time for the receiving device; means for selecting a means for adjusting the amplitude of the multicarrier signal according to a pre-designed criterion; for transmitting said multicarrier on-off keying signal.
18. A radio communication control information transmission terminal device for implementing the method of any one of claims 1 to 13, characterized in that,
at least one module in the wireless communication control information transmission terminal device is used for at least one of the following functions: at least one of a received signal strength, a detection sensitivity, a circuit hardware structure, and an envelope detection circuit response time for the receiving device; means for selecting a means for adjusting the amplitude of the multicarrier signal according to a pre-designed criterion; for transmitting said multicarrier on-off keying signal.
19. A radio communication control information transmission terminal device for implementing the method of any one of claims 1 to 13, characterized in that,
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 multicarrier on-off keying signal; for demodulating control information in accordance with the detected length or position of the high-amplitude or low-amplitude signal of the multicarrier on-off keying signal; for transmitting at least one of signal strength, detection sensitivity and envelope detection circuit hardware response time of the receiving device.
20. A communication device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method according to any one of claims 1 to 13.
21. A computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any of claims 1 to 13.
22. A mobile communication system comprising a radio communication control information transmission network device according to claim 17, a radio communication control information transmission terminal device according to claim 18 and/or a radio communication control information transmission terminal device according to claim 19.
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