CN118119020A

CN118119020A - Communication method and device

Info

Publication number: CN118119020A
Application number: CN202211525191.4A
Authority: CN
Inventors: 曲韦霖; 吴毅凌; 金哲
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2024-05-31
Also published as: WO2024114313A1

Abstract

The application provides a communication method and a communication device, which are used for improving the uplink transmission performance of a tag. The method comprises the following steps: the first terminal device determines a first sequence, and the first sequence and a second sequence adopted by the second terminal device meet complementary characteristics, wherein the complementary characteristics meet the following conditions: the sliding autocorrelation values of the first sequence belong to a first set, the sliding autocorrelation values of the second sequence belong to a second set, any sliding autocorrelation value in the first set corresponds to one sliding offset value, and any sliding autocorrelation value in the second set corresponds to one sliding offset value; when the first sliding offset value is non-zero, the sum of the sliding autocorrelation values is zero; when the first sliding offset value is zero, the sum of the sliding autocorrelation value corresponding to the first sliding offset value in the first set and the sliding autocorrelation value corresponding to the first sliding offset value in the second set is non-zero, and the first terminal device generates and transmits a first uplink signal according to the first sequence.

Description

Communication method and device

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a communication method and apparatus.

Background

With the use of 5G NR communication machine-type communication (MTC) and internet of things (internet of things, ioT) communication, the use is becoming more and more widespread. Passive internet of things (IoT) and backscatter communications (backscatter) are currently important research directions in the field of internet of things. In a passive internet of things system, there are terminals that can perform reverse (backscatter) communication, which can be defined as tags, and further classified as passive tags and semi-passive tags, or which can also be defined as terminal devices that perform backscatter communication. The passive tag does not have energy supply equipment and circuits, and only depends on receiving radio frequency signals sent by network equipment in the downlink, and a series of circuits such as a filter circuit and the like are used for obtaining direct current voltage to obtain energy supply so as to further demodulate subsequent downlink signals and reflect subsequent uplink signals.

For the tag, due to the limitation of low power consumption and low complexity, the tag has no accurate high-frequency clock generating capability, and only has less accurate medium-frequency clock or low-frequency clock generating capability, so that uplink signals sent by a plurality of tags cannot be guaranteed to reach a strict synchronous state at the base station side. Therefore, there may be a certain time deviation in the uplink signals of the plurality of tags, and when the plurality of tags perform uplink transmission in a code division multiplexing manner, the base station side cannot correctly demodulate the uplink signal transmitted by each tag, which results in a decrease in transmission performance.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for improving uplink transmission performance under the condition that a plurality of tags use the same time-frequency resource.

In a first aspect, a communication method is provided. The method may be implemented by a first terminal device, which may also be referred to as a first communication device. The first terminal device may be a terminal device or a component in a terminal device. The components in the present application may include, for example, at least one of a chip, a system-on-chip, a processor, a transceiver, a processing unit, or a transceiver unit. Taking the example that the execution subject is the first terminal device, the method can be realized by the following steps: the first terminal device determines a first sequence, the first sequence and the second sequence satisfying complementary characteristics, the second sequence being used by the second terminal device to transmit a second uplink signal, the complementary characteristics satisfying the following conditions: the sliding autocorrelation values of the first sequence belong to a first set, the sliding autocorrelation values of the second sequence belong to a second set, any sliding autocorrelation value in the first set corresponds to one sliding offset value, and any sliding autocorrelation value in the second set corresponds to one sliding offset value; when a first sliding offset value is non-zero, the sum of the sliding autocorrelation values in the first set corresponding to the first sliding offset value and the sliding autocorrelation values in the second set corresponding to the first sliding offset value is zero; when a first sliding offset value is zero, a sum of sliding autocorrelation values in the first set corresponding to the first sliding offset value and sliding autocorrelation values in the second set corresponding to the first sliding offset value is non-zero; the first terminal device generates a first uplink signal according to the first sequence; the first terminal device transmits the first uplink signal.

Based on the method described in the first aspect, the first terminal device may transmit the uplink signal through the first sequence, and further, the second terminal device may transmit the uplink signal through the second sequence, wherein the complementary characteristic is satisfied between the first sequence and the second sequence. The network equipment can still determine the uplink signal time boundaries of different terminal devices through the sliding autocorrelation values under the existence of a certain time deviation of the arrival time of the first uplink signal and the second uplink signal, so that the first uplink signal can be accurately demodulated, the uplink multi-label transmission performance is effectively improved, and the uplink multi-label transmission capacity is improved.

In one possible implementation, the first sequence consists of a first sub-sequence and a second sub-sequence, the first sub-sequence and the second sub-sequence satisfying the complementary property; and/or the second sequence consists of a third subsequence and a fourth subsequence, the third and fourth subsequences satisfying the complementary property.

Based on this implementation, a low complexity way of generating the first sequence or the second sequence satisfying the complementary property can be further found.

In one possible implementation manner, the first terminal device may further receive first information from a network device, where the first information is used to instruct or configure the first terminal device to generate a first uplink signal using the first sequence.

Based on this implementation, the first terminal device may transmit the first uplink signal with the first sequence based on an indication or configuration of the base station.

In one possible implementation, the first information further includes at least one of: a base sequence comprised by the first sequence; the first sequence comprises an index number of a base sequence or an index number of a base sequence group where the base sequence is located; a sequence group index number where the first sequence is located; the first sequence is at the index number of the sequence group.

Based on the implementation manner, the network device can configure the terminal to determine multiple modes of the first sequence, so that different labels can select different sequences as far as possible to transmit uplink signals, uplink signals transmitted among multiple labels are prevented from being transmitted, collision is reduced, and therefore uplink multi-label transmission capacity is improved.

In a possible implementation, the first information is further used to indicate a composition and/or a composition order of obtaining the first sequence from the base sequence.

Based on the implementation mode, the enabling tag can only store the base sequence and several combined operation modes, and the sequence completed by all the combinations is not required to be stored, so that the tag storage overhead is reduced, and the tag power consumption and complexity are reduced. In addition, the signaling overhead of the network device indication procedure may be reduced compared to a scheme indicating a complete first sequence.

In one possible implementation, the first sequence consists of a first subsequence and a second subsequence; wherein the first subsequence is the base sequence, and the second subsequence is a sequence that satisfies a complementary property to the base sequence or is the complement of a sequence that satisfies a complementary property to the base sequence; or the first subsequence is a sequence which meets the complementary characteristic with the base sequence or is an inverse sequence of the sequence which meets the complementary characteristic with the base sequence, and the second subsequence is the base sequence; wherein the position of the first sub-sequence in the first sequence is located before the second sub-sequence or the position of the first sub-sequence in the first sequence is located after the second sub-sequence.

Based on the implementation, an example of a composition form of the first sequence meeting the complementary characteristic is provided, and the continuous iterative combination form can simplify the storage of the tag, only the base sequence and a possible operation mode are needed to be stored, so that the power consumption and the complexity caused by the storage of the tag are reduced.

In one possible implementation, the first information is carried in a MAC CE, an RRC message, or DCI.

Based on this implementation, providing the first information may be semi-statically configured or dynamically configured, providing a more flexible implementation.

In one possible implementation manner, the terminal device may perform line coding with the first sequence as a chip unit to generate the first uplink signal; or the terminal device may generate the first uplink signal with a code sequence of a line code as a chip unit of the first sequence.

Based on the implementation, a flexible way of generating the first uplink signal is provided.

In a second aspect, a communication method is provided. The method may be implemented by a network device or a component in a network device, which may also be referred to as a first communication means. The components in the present application may include, for example, at least one of a chip, a system-on-chip, a processor, a transceiver, a processing unit, or a transceiver unit. Taking the example that the execution subject is a network device, the method can be realized by the following steps: the network device determines a first sequence and a second sequence, the first sequence and the second sequence satisfying complementary characteristics, the first sequence being used for the first terminal device to transmit a first uplink signal, the second sequence being used for the second terminal device to transmit a second uplink signal, the complementary characteristics satisfying the following conditions: the sliding autocorrelation values of the first sequence belong to a first set, the sliding autocorrelation values of the second sequence belong to a second set, any sliding autocorrelation value in the first set corresponds to one sliding offset value, and any sliding autocorrelation value in the second set corresponds to one sliding offset value; when a first sliding offset value is non-zero, the sum of the sliding autocorrelation values in the first set corresponding to the first sliding offset value and the sliding autocorrelation values in the second set corresponding to the first sliding offset value is zero; when a first sliding offset value is zero, a sum of sliding autocorrelation values in the first set corresponding to the first sliding offset value and sliding autocorrelation values in the second set corresponding to the first sliding offset value is non-zero; the network device receives the first uplink signal from the first terminal apparatus.

In one possible implementation, the network device may receive the second uplink signal from the second terminal apparatus.

In one possible implementation, the first sequence may consist of a first sub-sequence and a second sub-sequence, the first sub-sequence and the second sub-sequence satisfying the complementary property; and/or the second sequence may consist of a third subsequence and a fourth subsequence, the third and fourth subsequences satisfying the complementary property.

In one possible implementation, the network device sends first information, where the first information is used to instruct or configure the first terminal device to generate a first uplink signal using the first sequence.

In a third aspect, a communication device is provided. The apparatus may implement the method of any of the possible designs of the first aspect or the second aspect. The device has the functions of the first terminal device or the network equipment. The device is, for example, a terminal device corresponding to the first terminal device, or a functional module in the terminal device, or a network device, or a functional module in the network device, etc.

In an alternative implementation manner, the apparatus may include modules corresponding to each other in performing the methods/operations/steps/actions described in the first aspect or the second aspect, where the modules may be hardware circuits, or software, or implemented by using hardware circuits in combination with software. In an alternative implementation, the apparatus includes a processing unit (sometimes also referred to as a processing module) and a communication unit (sometimes also referred to as a transceiver module, a communication module, etc.). The transceiver unit can realize a transmission function and a reception function, and may be referred to as a transmission unit (sometimes referred to as a transmission module) when the transceiver unit realizes the transmission function, and may be referred to as a reception unit (sometimes referred to as a reception module) when the transceiver unit realizes the reception function. The transmitting unit and the receiving unit may be the same functional module, which is called a transceiver unit, and which can implement a transmitting function and a receiving function; or the transmitting unit and the receiving unit may be different functional modules, and the transceiver unit is a generic term for these functional modules.

For example, when the apparatus is used to perform the method described in the first or second aspect, the apparatus may comprise a communication unit and a processing unit.

In a fourth aspect, embodiments of the present application also provide a communications apparatus comprising a processor for executing a computer program (or computer executable instructions) stored in a memory, which when executed causes the apparatus to perform a method as in the first or second aspect and its respective possible implementations.

In one possible implementation, the processor and memory are integrated together;

In another possible implementation, the memory is located outside the communication device.

The communication device also includes a communication interface for the communication device to communicate with other devices, such as the transmission or reception of data and/or signals. By way of example, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

In a fifth aspect, there is provided a computer readable storage medium storing a computer program or instructions which, when executed, cause the method of the first or second aspect and any possible implementation thereof to be carried out.

In a sixth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the method of the first or second aspect and any possible implementation thereof to be carried out.

In a seventh aspect, embodiments of the present application further provide a communication device configured to perform the method in the first aspect or the second aspect and various possible implementations thereof.

In an eighth aspect, a chip system is provided, where the chip system includes logic (or is understood that the chip system includes a processor, where the processor may include logic, etc.), and may further include an input-output interface. The input-output interface may be used for inputting messages as well as for outputting messages. The input/output interfaces may be the same interface, i.e., the same interface can implement both a transmitting function and a receiving function; or the input/output interface comprises an input interface and an output interface, wherein the input interface is used for realizing a receiving function, namely, receiving a message; the output interface is used for implementing the sending function, i.e. for sending messages. Logic circuitry may be operative to perform operations other than transceiver functions in the methods of the first or second aspects and any possible implementation thereof; the logic may also be used to transmit messages to the input-output interface or to receive messages from other communication devices from the input-output interface. The system on a chip may be used to implement the method of the first or second aspect described above and any possible implementation thereof. The chip system may be formed of a chip or may include a chip and other discrete devices.

Optionally, the system on a chip may further include a memory, the memory being operable to store instructions, the logic circuit being operable to invoke the instructions stored in the memory to implement the corresponding functionality.

A ninth aspect provides a communication system which may comprise a first terminal device operable to perform a method as described in the first aspect and any of its possible implementations and a network device operable to perform a method as described in the second aspect and any of its possible implementations. Optionally, the communication system may further comprise a second communication device according to the first and/or second aspect and its respective possible implementation manner.

Technical effects brought about by the second to ninth aspects may be referred to the description of the first aspect, and are not repeated here.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

FIG. 2 is a diagram illustrating an uplink signal spectrum under different configurations;

fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application;

FIG. 4 is a schematic diagram of complementary sequence demodulation according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a sliding autocorrelation value of a complementary sequence according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 7 is a schematic structural diagram of another communication device according to the present application;

Fig. 8 is a schematic structural diagram of another communication device according to the present application.

Detailed Description

The embodiment of the application provides a communication method and device. The method and the device are based on the same inventive concept, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated. In the description of the embodiment of the present application, "and/or" describing the association relationship of the association object indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. At least one in reference to the present application means one or more; plural means two or more. In addition, it should be understood that in the description of the present application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not for indicating or implying any relative importance or order.

For ease of understanding, some of the terms relating to the embodiments of the present application will be explained below.

1) Amplitude shift keying (amplitude SHIFT KEYING, ASK)

Modulation in which the amplitude variation of the carrier wave is controlled by a baseband digital signal is called amplitude shift keying modulation, also called digital amplitude modulation. In its simplest form, binary amplitude shift keying (2 ASK).

The 2ASK modulation may be implemented by a multiplier and a switch circuit, for example. The carrier is turned on or off under the control of the digital signal 1 or 0, and the carrier with the amplitude A is turned on under the state that the digital signal is 1, and the carrier with the amplitude A is transmitted on a transmission channel at the moment; in the state that the digital signal is 0, the carrier wave with the amplitude B is turned on, and at this time, the carrier wave with the amplitude B is transmitted on the transmission channel. Therefore, the receiving end can judge the digital signal 1 or 0 according to the amplitude of the detected carrier.

2) On-off keying (OOK) modulation

The OOK modulation is an on-off amplitude shift keying modulation. OOK is a special case of 2ASK modulation.

The OOK modulation may be implemented by a multiplier and a switching circuit, for example. The carrier is switched on or off under the control of the digital signal 1 or 0, and is switched on in the state that the digital signal is 1, and at the moment, the carrier is transmitted on the transmission channel; in the state where the digital signal is 0, no carrier is on, and no carrier is transmitted on the transmission channel. Therefore, the receiving end can judge the digital signal 1 or 0 according to whether the carrier is detected.

Applying OOK modulation in a new air-interface (NR) or long term evolution (long term evolution, LTE) system, the amplitude (or envelope, level, energy, etc.) is high (e.g., above a certain threshold, or is not 0) and is called OOK modulation symbol {1}, or OOK modulation symbol ON (ON), or OOK modulation symbol ON; the low amplitude (or envelope, level or energy, etc.) is (e.g., below a certain threshold, or 0) referred to as OOK modulation symbol {0}, or OOK modulation symbol OFF (OFF), or OOK modulation symbol OFF. The amplitude is defined relative to the amplitude demodulation threshold of the receiver, and is higher than the demodulation threshold and lower than the demodulation threshold, namely, is higher than the amplitude.

3) Frequency Shift Keying (FSK) modulation

The modulation scheme in which the frequency variation of the carrier wave is controlled by the baseband digital signal is called frequency shift keying modulation. In its simplest form, binary frequency shift keying (2 FSK).

In 2FSK modulation, for example, the carrier transmits 1 carrier signal in 2 frequency points under the control of digital signal 1 or 0, and in the state that the digital signal is 1, the carrier of frequency f1 is turned on, and at this time, there is a carrier transmission on the f1 transmission channel; in the state where the digital signal is 0, the carrier wave of the frequency f2 is turned on, and at this time, the carrier wave is transmitted on the f2 transmission channel. Therefore, the receiving end can compare which path of the f1 and f2 transmission channels has the carrier to judge whether the digital signal 1 or 0 is transmitted. The baseband digital signal and OOK modulated signal are transmitted similarly on the transmission channel for each frequency.

Applying 2FSK modulation in NR or LTE system, the frequency point f1 signal amplitude (or envelope, level or energy, etc.) is higher than the frequency point f2 signal amplitude (or envelope, level or energy, etc.) which is called 2FSK modulation symbol {1}; whereas the frequency point f1 signal amplitude (or envelope, level or energy, etc.) is lower than the frequency point f2 signal amplitude (or envelope, level or energy, etc.) by a so-called 2FSK modulation symbol {0}. The signal amplitude of the single frequency point is defined by comparing the amplitude of the signal with the amplitude of the signal of the other frequency point, and is higher than the amplitude of the signal of the other frequency point and lower than the amplitude of the signal of the other frequency point.

4) Coherent demodulation and noncoherent demodulation

The coherent demodulation needs to recover the coherent carrier wave, and the original digital baseband signal is obtained by utilizing the action of the coherent carrier wave and the modulated signal, wherein the coherent carrier wave and the carrier wave of the digital baseband signal modulated by the transmitting end are in the same frequency and phase.

Incoherent demodulation does not require recovery of the coherent carrier wave and recovery of the original digital baseband signal from the amplitude envelope of the modulated signal.

Thus, uncorrelated demodulation is simpler than coherent demodulation, but has a loss in performance.

5) Envelope detection (envelope detection)

The envelope detection is a signal detection method for obtaining the envelope or amplitude line of a low-frequency original signal by taking a high-frequency signal as an input signal and using a half-wave or full-wave rectifying circuit. The receiver compares the envelope of the original signal after digital sampling with the amplitude or energy threshold set by the receiver according to the obtained envelope of the original signal, and decides whether the transmitted signal is 1 or 0, that is, whether the signal is ON or OFF (ON/OFF).

6) Double sideband OOK/ASK modulated signal

The amplitude modulation is an effective modulation mode which enables envelope detection demodulation without local high-frequency local oscillation, only one path of modulation is adopted by OOK/ASK, and taking OOK/2ASK modulation as an example, a transmitter modulates 0/1 information bit into two signal amplitudes, for example, information bits 0 and 1 are respectively modulated into rectangular square wave signals with amplitude 0 and amplitude 1, or signal waveforms close to rectangle or square wave. However, the OOK/ASK modulation has a general problem in that, for the reason that there is only one real signal, the frequency spectrum function of the OOK/ASK modulated signal is conjugate symmetric about the center 0 frequency, the power spectrum function is axisymmetric about the center 0 frequency, taking the symbol rate of the OOK/ASK signal as R as an example, and the bandwidth of the main lobe of the signal frequency domain is 2R. The conventional OOK/ASK modulation may be referred to as a double sideband modulated signal, i.e. symmetrical about the central axis, with an effective spectral efficiency of only 50% (effective signal bandwidth/signal actual bandwidth=r/2r=50%).

7) Single sideband OOK/ASK modulated signal

In the communication principle, the frequency domain signals of the upper half band or the lower half band of the axisymmetry of the double sidebands are eliminated while the OOK/ASK baseband signal information is reserved. The spectral efficiency of the signal is 100% and the symbol rate is doubled compared to a double sideband signal.

8) In the description of the present application, the words "first," "second," and the like are used solely for the purpose of distinguishing between descriptions and not necessarily for the purpose of indicating or implying a relative importance or order.

In the description of the present application, "at least one species" means one species or a plurality of species, and a plurality of species means two species or more than two species. "at least one of the following" or similar expressions thereof, means any combination of these items, including any combination of single or plural items. E.g., a. b. Or c, may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a. b. The number of c may be single or plural.

In the description of the present application, "and/or", describing the association relationship of the association object, three relationships may exist, for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. "/" means "OR", e.g., a/b means a or b.

In order to describe the technical solution of the embodiments of the present application more clearly, the following describes in detail the communication method and the device provided by the embodiments of the present application with reference to the accompanying drawings.

The communication method provided by the application can be applied to various communication systems, for example, the embodiment of the application can be applied to an internet of things (internet of things, ioT) network, a backscatter communication system (also called a passive communication system) or a semi-passive communication system. Of course, embodiments of the present application may also be applicable to other possible communication systems, for example, an LTE system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD), an advanced long term evolution (LTE ADVANCED, LTE-a) system, a universal mobile telecommunications system (universal mobile telecommunication system, UMTS), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation (5th generation,5G) communication system (such as an NR system), a future evolved NR wireless communication system, and a future sixth generation (6th generation,6G) communication system or other future communication systems or networks, etc. Optionally, the communication method provided by the embodiment of the application can be applied to business scenes such as back scattering communication, passive internet of things communication and the like in an NR communication system. Alternatively, the downlink may be sent by the NR base station/pole station/micro station/small station or NR terminal device or reader/writer to passive terminal device/passive IoT terminal device/semi-passive IoT terminal device/backscatter capable terminal device, the uplink may send information to the NR base station/pole station/micro station/small station or NR terminal device or reader/writer by passive terminal device/passive IoT terminal device/semi-passive IoT terminal device/terminal device with backscatter capability.

The above-mentioned communication system to which the present application is applied is merely illustrative, and the communication system to which the present application is applied is not limited thereto, and is generally described herein, and will not be described in detail.

By way of example, fig. 1 shows a possible architecture of a communication system to which the communication method provided by the present application is applicable, where the architecture of the communication system may include at least one network device and at least one terminal device. For example, as shown in fig. 1, two network devices of the network device 1 and the network device 2, and eight terminal devices of the terminal devices 1 to 8 may be included in the communication system.

In the communication system, the network device 1 may transmit information to one or more of the terminal devices 1 to 6. The network device 1 may send information to one or more of the terminal devices 7 and 8 via the network device 2. Furthermore, the terminal devices 4 to 6 may also constitute a sub-communication system in which the terminal device 5 may send information to one or more of the terminal devices 4 and 6. The network device 2, the terminal device 7 and the terminal device 8 may also constitute a sub-communication system in which the network device 2 may send information to one or more of the terminal device 7 and the terminal device 8. It should be understood that fig. 1 is only a schematic diagram, and the present application is not limited in particular to the type of communication system, and the number, type, etc. of devices included in the communication system.

The network device may be a device with a wireless transceiver function or a chip that may be disposed on the network device, where the network device includes, but is not limited to: a base station (eNodeB) of LTE, a base station (generation Node B, gNB) of NR, a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIRELESS FIDELITY, wi-Fi) system, a wireless relay Node, a wireless backhaul Node, a transmission point reception point (transmission and reception point, TRP), a transmission point (transmission point, TP), a reader, an assistant (helper), etc., and may also be a network Node constituting the gNB or transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc. When the network device is a base station, the network device can be a macro base station, a micro base station, a small base station or a pole station. The network device may be a network device that supports receiving data transmitted by the reflected communication.

The terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal devices in embodiments of the present application may be mobile phones (mobile phones), tablet computers (Pad), computers with wireless transceiving functionality, passive terminal devices, passive IoT terminal devices, semi-passive IoT terminal devices, virtual Reality (VR) terminal devices, augmented reality (augmented reality, AR) terminal devices, wireless terminals in industrial control (industrial control), wireless terminals in unmanned (SELF DRIVING), wireless terminals in remote medical (remote medical), wireless terminals in smart grid (SMART GRID), wireless terminals in transportation security (transportation safety), wireless terminals in smart city (SMART CITY), smart wearable devices (smart glasses, smart watches, smart headphones, etc.), wireless terminals in smart home (smart home), terminal devices for machine-like communications, and so on. The terminal device may be a terminal device supporting reflective communication, such as a tag. The terminal device may be a chip or a chip module (or a chip system) or the like that can be provided in the above device. The embodiment of the application does not limit the application scene. In the application, the terminal equipment with wireless receiving and transmitting function and the chip capable of being arranged on the terminal equipment are collectively called as the terminal equipment.

The terminal device in the present application may also be a passive terminal device with an envelope detection receiver, a passive IoT terminal device, a semi-passive IoT terminal device, a terminal device with backscatter capability, an NR terminal device, an NR base station/pole station/micro station/small station, a reader/writer terminal device, etc.

The architecture and the scenario of the communication system described in the embodiments of the present application are for more clearly describing the technical solution provided in the embodiments of the present application, and do not constitute a limitation to the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is equally applicable to similar technical problems.

The following describes embodiments of the present application by taking a communication process between a tag and a base station as an example, and it will be understood that practical application of the embodiments of the present application is not limited by the communication process between the tag and the base station.

In the current communication technology, the base station can adjust the code rate M of the tag line code and the length T of the modulation symbol of the reflected signal. The frequency domain position and frequency domain bandwidth of the reflected signal of the tag within the carrier are dynamically adjusted. For the conventional uplink modulation mode OOK modulation or Binary Phase Shift Keying (BPSK) modulation, the amplitude of the frequency domain signal of the uplink signal is symmetrical about the center frequency point of the reflected signal, and the frequency domain signal has the characteristic of being symmetrical about the upper and lower sidebands of the center frequency point.

As shown in table 1, the base station configures different modulation symbol lengths (or lengths of uplink signal levels) and configurations of the line code rate M. Wherein the unit level length (Tari) is, for example, 3.125 microseconds (μs).

TABLE 1

Modulation symbol length (n.times.tari)	Line code rate M
		64	1
32	2
		16	4
8	8
		4	16

A schematic diagram of the uplink signal spectrum under different configurations is shown in fig. 2. It can be seen that the double sided baseband signal is frequency shifted to different positions and that the bandwidth of the upper or lower sideband of the baseband signal remains unchanged because the product of the symbol length and the line code rate remains unchanged.

Therefore, by configuring different modulation symbol lengths and line code rates, frequency shift in baseband signal carriers can be realized, different frequency domain resources of different labels can be configured for different parameter combinations to transmit uplink signals, but different frequency domain resources are consumed to transmit uplink signals of multiple labels, and the configured frequency domain positions are limited, so that the improvement of the transmission capacity of the uplink multiple labels is limited, and the effect of maximizing the capacity cannot be achieved. There is a need to further realize multiplexed transmission of more tags by means of code division. For example, a common code sequence among multiple users using code division multiplexing is a Hadamard (Hadamard) sequence. The construction of Hadamard sequences follows the following criteria:

Where H is the base matrix, e.g., H= [1], then the Hadamard matrix constructed at this time is

At this time, for uplink code division multiplexing, the terminal 1 may use the sequence [ 11 ]; the terminal 2 can use the sequence [1-1], different orthogonal sequences can be overlapped when the terminal 1 and the terminal 2 send signals, the receiving end receives the overlapped two user data, and the receiving end uses different local sequences to correlate the received signals respectively, so that the data of each user can be effectively and respectively demodulated due to the mutual orthogonality of the two user code sequences. Note, however, that orthogonality between code sequences used between two users is established when the uplink signals transmitted by the two users are synchronized, i.e., not only transmitted on the same frequency domain resources, but also superimposed on the same time domain resources at the same time of arrival of the two user signals at the time of demodulation at the base station.

However, due to the limitation of low power consumption and low complexity, the passive tag only has the capability of generating a low-frequency clock with low precision, and cannot guarantee that uplink signals sent by a plurality of tags reach a base station side to achieve a strict synchronous state. Therefore, there may be a certain time deviation in the time when the uplink signals sent by the plurality of tags arrive at the base station side, and when the plurality of tags perform uplink transmission in the existing code division multiplexing manner, orthogonality between code sequences is seriously destroyed, so that the base station side cannot correctly demodulate the uplink signal sent by each tag, and the multi-user transmission performance is greatly reduced.

The communication method provided by the embodiment of the application can be implemented by the terminal device. Wherein the terminal device may comprise a terminal device or a component in a terminal device. Alternatively, the terminal device may be a tag, which may be a passive tag, a semi-passive tag, or an active tag. The components of the present application may include, for example, at least one of a processor, transceiver, processing unit, or transceiver unit. Further, the present application may be performed by a plurality of terminal apparatuses including the first terminal apparatus and the second terminal apparatus hereinafter, and may further include further terminal apparatuses such as a third terminal apparatus and the like.

Hereinafter, a communication method provided by the embodiment of the present application will be described with a terminal apparatus as an execution subject.

As shown in fig. 3, the communication method provided by the embodiment of the present application may include the following steps:

S101: the first terminal device determines a first sequence.

The first sequence and the second sequence satisfy complementary characteristics, wherein the second sequence is used for the second terminal device to transmit the uplink signal.

In the application, the fact that the sequence A and the sequence B meet the complementary characteristic means that the sliding autocorrelation value of the sequence A belongs to a set A, the sliding autocorrelation value of the sequence B belongs to a set B, wherein any sliding autocorrelation value in the set A corresponds to a sliding offset value, any sliding autocorrelation value in the set B corresponds to a sliding offset value, and the set A and the set B meet the following conditions: when the sliding offset value X is not zero, the sum of the sliding autocorrelation value corresponding to the sliding offset value X in the set a and the sliding autocorrelation value corresponding to the first sliding offset value in the set B is zero; and when the sliding offset value X is zero, the sum of the sliding autocorrelation value corresponding to the sliding offset value X in the set a and the sliding autocorrelation value corresponding to the first sliding offset value in the set B is non-zero.

Taking BPSK modulation as an example, in one possible example, the sequence a is [1 1-1 ], the sequence B is [1 1-1 1], the sliding autocorrelation value of the sequence a is [ -1 014 1 0-1 ], the corresponding offset value is [ -3-2-1 012 3], the sliding autocorrelation value of the sequence B is [1 0-1 4-1-0 1], and the corresponding offset value is [ -3-2-1 012 3]. Each sliding autocorrelation value is a calculation result of correlation with the original sequence after the sequence moves by a corresponding offset value. The sum of the sliding autocorrelation value of sequence A and the sliding autocorrelation value of sequence B is [ 0008 000 ]. That is, the sum of the sliding autocorrelation value of the sequence a and the sliding autocorrelation value of the sequence B is 8 (not zero) only when the offset value is 0, and the autocorrelation values are zero after the rest of the shift values. It is thus possible to obtain that the sequence A and the sequence B satisfy complementary properties.

As one possible implementation, the first sequence may be composed of a first sub-sequence and a second sub-sequence, the first sub-sequence and the second sub-sequence satisfying complementary properties. Wherein the application does not limit the ordering of the first and second sub-sequences in the first sequence, e.g. the position of the first sub-sequence in the first sequence is before the second sub-sequence, or the position of the second sub-sequence in the first sequence may be before the first sub-sequence. Similarly, the second sequence may be composed of a third subsequence and a fourth subsequence, with complementary properties being satisfied between the third and fourth subsequences.

For example, the code sequence a used by the terminal 1 includes a first half sequence A1 and a second half sequence A2. Wherein, the first half sequence A1 and the second half sequence A2 have complementary characteristics. I.e. a2=a1. In the present application, a sequence satisfying complementary characteristics (simply referred to as a complementary sequence) is expressed, and complementary characteristics are satisfied between the sequence and the complementary sequence. Or the first half sequence A1 and the second half sequence A2 have complementary inversion characteristics. The inverse characteristic is as follows in the BPSK modulation mode: the values of the two sequences of corresponding elements are opposite to each other, such as 1 and-1; in the OOK modulation mode, the values of the corresponding elements of the two sequences are opposite to each other, for example, 1 and 0. In the BPSK modulation scheme or the OOK modulation scheme, the code sequence corresponding to the transmission modulation bit 1 and the code sequence corresponding to the modulation bit 0 satisfy the inverting characteristic, and if the code sequence corresponding to the transmission modulation bit 1 is A, the code sequence corresponding to the transmission modulation bit 0 is an inverting sequence of A

Alternatively, the first subsequence and/or the second subsequence respectively consists of two code sequences meeting complementary properties. Taking the first subsequence as an example, the first subsequence may be composed of a third subsequence and a fourth subsequence, wherein the third subsequence and the fourth subsequence satisfy a complementary relationship.

For example, the first half sequence A1 of the code sequence used by the terminal 1 includes a first half sequence a11 and a second half sequence a12, and the first half sequence a11 and the second half sequence a12 have complementary characteristics, that is, a12=a11. For example, the first sequence isWherein S is a base sequence, and the first subsequence and the second subsequence are [ S S x ] and/>, respectivelyAs another example, the first sequence is [ S S ] or/>That is, the first subsequence is the base sequence S, the second subsequence is the sequence S of the base sequence S satisfying the complementary property, or is the inverse sequence/>, of the sequence of the base sequence S satisfying the complementary propertyIn another example, the first sequence is [ S.times.S ] or/>That is, the first subsequence is the sequence S of the base sequence S satisfying the complementary property, or is the inverse sequence/>, of the sequence of the base sequence S satisfying the complementary propertyThe second subsequence is the base sequence. In the present application,/>This indicates that the value obtained by inverting element 1 in BPSK modulation is-1 and the value obtained by inverting element 1 in ask modulation is 0, for example. It will be appreciated that the position of any of the first subsequences exemplified in the present application in the first sequence may be interchanged with the position of the second subsequence in the first sequence.

Alternatively, the base sequence in the present application may be a 1-bit element, or may be a code sequence including at least 2-bit elements, and is not particularly limited.

As an alternative implementation, the first sequence may be understood as a set of base sequences (or referred to as a set of minimum length code sequences), which may include one or more base sequences (or minimum length code sequences). Wherein the set of base sequences or base sequences may be defined or configured by the network device, or the set of base sequences or base sequences may be protocol defined or predefined. The network device may be configured in a display configuration or an implicit configuration, which is not specifically required.

Alternatively, the first information may be transmitted by the network device to the first terminal apparatus, and the first sequence may be determined by the first terminal apparatus based on the first information. Wherein the first information may be used to configure or instruct the first terminal device to generate the first signal using the first sequence. For example, the first information may indicate (or include) at least one of the first sequence, a base sequence in the first sequence, an index number of the base sequence, indication information of the base sequence (e.g., an index number of a base sequence group in which the base sequence is located, etc.), a sequence group index number in which the first sequence is located, or an index number of the first sequence in the sequence group.

Alternatively, the above first information may be carried in an RRC message, MAC CE, or DCI. Wherein, if the indication is carried on DCI, the DCI may be used to schedule PUSCH, or to schedule PDSCH and PUSCH, or to schedule Msg4 messages, or to schedule paging messages. In addition, the first information may be obtained by the terminal device through a predefined manner, and is not particularly limited.

For example, if the display indicates the first sequence, the network device may carry the first sequence in the first information. For example, the first sequence isWherein S is a base sequence, and the first subsequence and the second subsequence are [ S S x ] and/>, respectivelyI.e. the first information may comprise the complete sequence of the first sequence. In another example, the first and second subsequences are [ S.times.S ] and/>, respectively

In addition, if the first sequence is implicitly configured, the network device may carry at least one of the base sequence or indication information of the base sequence, a sequence group index number where the first sequence is located, or an index number of the first sequence in the sequence group in the first information. For example, the base sequence is denoted S, the first sequence is [ S S x ], and when the first information includes the base sequence, the first information may include the complete sequence of the base sequence S; as another example, when the first information includes an index number of the base sequence, the first information may include an index of the base sequence S in the base sequence set, and thus the first terminal device may determine the base sequence S from the base sequence set according to the index; for another example, when the first information includes a sequence group index of the first sequence in the sequence group, the first terminal apparatus may determine the first sequence from the sequence group according to the sequence group index; for another example, when the first information includes a sequence group index number, the first terminal device may determine a sequence group in which the first index is located from among a plurality of sequence groups, and further determine the first sequence from at least one sequence included in the sequence group.

Alternatively, the first information may further include a composition manner and/or a composition order in which the first sequence is obtained from the base sequence, and the terminal first terminal device may obtain the first sequence from the base sequence according to the composition manner and/or the composition order. If the first terminal device obtains the composition and/or the composition sequence of the first sequence according to the first information or the predefined determination, the first terminal device only needs to know the base sequence to determine the first sequence. For example, using default or configured composition and composition order, the first sequence beingThe network device only needs to indicate S through the first information, and the first terminal device can obtain the complete first sequence/>, according to the composition mode and/or the composition sequence of the first sequence/>

In the present application, the composition may refer to a sequence obtained by transforming and expanding a base sequence included in the first sequence. For example, the composition may indicate S or S as the first half sequence of the first and second subsequences, or S as the first subsequence. The composition order may refer to the order of the sequences included in the first sequence, which are transformed according to the base sequence. The sequence obtained by transforming the base sequence may include the base sequence itself, a complementary sequence of the base sequence, an inverted sequence of the base sequence, or an inverted sequence of the complementary sequence of the base sequence. For example, in the previous example, where the base sequence is denoted as S and the first sequence is [ S S x ], the composition may indicate that the first sequence includes S and S, and the composition may indicate that S precedes S. In addition, the first sequence may also be S, and the composition order may indicate that S follows S.

Alternatively, before S101, the first sequence may be determined from the sequence set by the network device and indicated to the first terminal device.

In addition, the network device may also determine a second sequence and transmit the second sequence to the second terminal apparatus. For example, when the first terminal device and the second terminal device transmit uplink signals to the network apparatus, the network apparatus may indicate the first sequence and the second sequence to the first terminal device and the second terminal device, respectively. Wherein the first sequence and the second sequence satisfy complementary properties. Alternatively, it can be said that any two sequences in the sequence set satisfy complementary characteristics. It is understood that the sequence set may be a sequence group where the first sequence is located, or may be a set of a plurality of sequence groups.

It is understood that in addition to the first sequence and the second sequence, the set of sequences in the present application may include a third sequence, etc., wherein the third sequence satisfies the complementary property with the first sequence and the third sequence satisfies the complementary property with the second sequence. The third sequence may be used for the third terminal device to transmit an uplink signal. The third sequence may be referred to as a description of the second sequence and will not be repeated.

S102: the first terminal device generates a first uplink signal according to the first sequence.

The first terminal device may perform line code encoding according to the first sequence to obtain a first uplink signal.

Alternatively, the present application may be configured by the network device to the terminal apparatus, or by the terminal apparatus according to a predefined combination of the obtained code sequence and the line code. As one of the combination modes of the code sequence and the line code, the line code is line-coded in units of the code sequence having the spreading factor of M, that is, the terminal device may generate the first uplink signal by line-coding in units of the first sequence as a chip. Or as another combination of the code sequence and the line code, the code sequence is a code sequence of the line code per chip unit, that is, the terminal device may generate the first uplink signal with the code sequence of the line code as a chip unit of the first sequence.

Taking spreading factor m=2 as an example, the base sequence groups configured by the network device are s= [ 11 ] and s= [ 1-1 ], and the base sequence combinations in the network device may also be configured by the network device as [ S S ] andThe code sequences in the code sequence group of m=4 are [ 11-1 ] and [1 1-1 1], and the code sequences in the code sequence group of m=8 are [1 1-1-1-1 1] and [1 1-1-1 1-1 ]. If the line code is line coded in units of a code sequence Q with a spreading factor of M, for example, m=2, and the line code is manchester coded, the code sequence after the line coding is/>Or/>If the spreading sequence is in units of a code sequence of a line code per chip, e.g., m=2, and the line code is manchester encoded, each 1 in the code sequence will be replaced with a 1-1 or a-1 1.

If the line code and the spreading code sequence are not considered to be combined, the spreading code sequence may include a plurality of consecutive 1 s or a plurality of 0 s, and for ASK modulation or OOK modulation, an excessive number of consecutive 1 s or consecutive 0 s may affect clock synchronization of the network device. To avoid this, the present application may alternatively introduce the above-described spreading code sequence in the unit of a line code chip or introduce the line code sequence in the spreading code sequence to control the number of consecutive 1 s or consecutive 0 s after the actual encoding. However, for the actual uplink coding flow, the spreading may be performed first, and then the line coding may be performed, so as to achieve the purpose of coverage improvement.

S103: the first terminal device transmits a first uplink signal.

Accordingly, the network device receives the first signal.

Optionally, the second terminal device may further send a second uplink signal according to the second sequence, and the network device may further receive the second uplink signal.

As one possible application scenario, the first uplink sequence used by the first uplink signal and the second uplink sequence used by the second uplink signal may be configured or indicated to be transmitted by the same downlink signal of the network device. For example, the downlink signal may be DCI signaling or MAC CE signaling or RRC signaling, e.g., MAC CE signaling may be ACK or NACK signaling; wherein the carried signaling may include two fields, a first field indicating a first sequence used by the first terminal device and a second field indicating a second sequence used by the second terminal device. Or the first uplink sequence used by the first uplink signal and the second uplink sequence used by the second uplink signal may also be configured or indicated by two downlink signals of the network device. The two downlink signals (e.g., the first signaling and the second signaling) may be two DCIs or two MAC CE signaling or two RRC signaling, e.g., the MAC CE signaling may be ACK or NACK signaling; wherein the first signaling indicates a first sequence used by the first terminal device and the second signaling indicates a second sequence used by the second terminal device. In addition, the first uplink signal and the second uplink signal occupy the same time-frequency resource or the same frequency-domain resource.

As a possible application scenario, the first uplink sequence used by the first uplink signal and the second uplink sequence used by the second uplink signal may be configured or indicated to be transmitted by the same downlink signal of the network device, but the first uplink sequence used by the first uplink signal and the second uplink sequence used by the second uplink signal are selected by the first terminal device and the second terminal device. For example, the downlink signal may be DCI signaling, or MAC CE signaling, or RRC signaling, or paging signaling, for example, MAC CE signaling may be a signaling Query of a bearer Query function or a signaling Query rep of a bearer repetition Query function, where the MAC CE signaling triggers the first terminal device to select a first sequence to use according to its terminal equipment identifier (UE ID) or a random number sequence generated during random access, and triggers the second terminal device to select a second sequence to use according to its UE ID or a random number sequence generated during random access. In addition, the first uplink signal and the second uplink signal occupy the same time-frequency resource or the same frequency-domain resource.

Based on the flow shown in fig. 3, the first terminal device may transmit an uplink signal through a first sequence, and further, the second terminal device may transmit an uplink signal through a second sequence, wherein the first sequence and the second sequence satisfy complementary characteristics. The base station can still determine the time boundaries of the uplink signals of different terminal devices through the sliding autocorrelation values in the presence of a certain time deviation, so that the uplink signals of a plurality of terminal devices are accurately demodulated, and the uplink multi-label transmission performance is effectively improved.

Assuming that there is a time offset (gap) between tag 1 and tag 2, the time offset is denoted as d, and d=1, i.e., gap is the modulation symbol time length (or the time length called chip). Wherein tag 1 and tag 2 are the first terminal device and the second terminal device, respectively. Further, it is further assumed that the sequences employed by tag 1 and tag 2 are shown in FIG. 4, respectively, i.e., the code sequence employed by tag 1 (e.g., the first sequence) is [1 1-1 ], and the code sequence employed by tag 2 (e.g., the second sequence) is [1 1-1 1]. Two bits transmitted by tag 1 are [ 11 ], so the corresponding transmission sequence is [1 1-1 11 1-1 ]; the two bits transmitted by tag 2 are [ 11 ], so the corresponding transmission sequence is [1 1-1 1].

The base station performs sliding autocorrelation by using the code sequence [ 11 1-1 ] and the received superimposed data of the tag 1 and the tag 2, so that the starting time of transmitting the uplink signal at the tag 1 can be obtained, and the correlation value is 7, that is, is non-zero, so that the starting time of transmitting the uplink signal at the tag 1 is determined. Wherein the code sequence [ 11 1-1 ] is the first sequence configured by the network device for tag 1. Further, when the code sequence [ 11 1-1 ] is used to slide to the start timing of transmitting the upstream signal by the tag 2, the correlation value is 0. As shown in fig. 5, the abscissa in the coordinate axis is time, where 1 time unit on the abscissa is represented by a time length of 1 chip of the code sequence, and the ordinate is a sliding correlation value, it can also be observed that the correlation values are all 0 except for the chips (i.e. chips 0 and 4) at the start time of transmitting the uplink signal by the tag 1, so that the network device can effectively detect, according to the local sequence, the start time of transmitting the signal by the tag 1 to transmit the two bit corresponding code sequences. After obtaining the two starting moments, the network device can decode the sequence and then demodulate the bit information carried by the uplink transmission data sent by the tag 1.

Based on the same conception, the embodiment of the application also provides a communication device. The communication device may include corresponding hardware structures and/or software modules that perform the functions shown in the above methods. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application scenario and design constraints imposed on the solution.

Fig. 6 to 8 are schematic structural diagrams of possible communication devices according to an embodiment of the present application. The communication device may be configured to implement the functions of the first terminal device and/or the network device in the above method embodiment, so that the beneficial effects of the above method embodiment may also be implemented. In one possible implementation, the communication means may be a terminal device or a network device as shown in fig. 1. Details and effects relating to the foregoing embodiments may be found in the description of the foregoing embodiments.

As shown in fig. 6, the communication device 600 includes a processing unit 610 and a communication unit 620, where the communication unit 620 may also be a transceiver unit or an input-output interface, etc. The communication device 600 may be configured to implement the functionality of the first terminal device and/or the network equipment in the method embodiment shown in fig. 3 and described above.

In implementing the method performed by the first terminal device shown in fig. 3, the processing unit 610 may be configured to determine a first sequence and generate a first uplink signal according to the first sequence. The communication unit 620 may be configured to transmit the first uplink signal.

Optionally, the communication unit 620 may be further configured to receive the first information from the network device.

Alternatively, the processing unit 610 may generate the first uplink signal by performing line coding with the first sequence as a chip unit, or may generate the first uplink signal by using the line-coded code sequence as a chip unit of the first sequence.

In implementing the method performed by the network device shown in fig. 3, the processing unit 610 may be configured to determine the first sequence. The communication unit 620 may be configured to receive a first uplink signal from a first terminal device.

Optionally, the communication unit 620 may be further configured to receive a second uplink signal from the second terminal device.

Optionally, the communication unit 620 may be further configured to send the first information.

It should be understood that the division of the modules in the embodiments of the present application is merely illustrative, and there may be another division manner in actual implementation, and in addition, each functional module in the embodiments of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

Fig. 7 shows a communication apparatus 700 according to an embodiment of the present application, for implementing the communication method according to the present application. The communication device 700 may be a communication device to which the communication method is applied, may be a component in a communication device, or may be a device that can be used in cooperation with a communication device. The communication device 700 may be a first terminal device and/or a network apparatus. The communication device 700 may be a system-on-chip or a chip. In the embodiment of the application, the chip system can be formed by a chip, and can also comprise the chip and other discrete devices. The communication device 700 comprises at least one processor 720 for implementing the communication method provided by the embodiment of the application. The communication device 700 may also include an input-output interface 710, which may include an input interface and/or an output interface. In embodiments of the present application, input-output interface 710 may be used to communicate with other devices via a transmission medium, the functions of which may include transmitting and/or receiving. For example, when the communication apparatus 700 is a chip, it is transmitted to other chips or devices through the input/output interface 710. Processor 720 may be used to implement the methods shown in the method embodiments described above.

Illustratively, the processor 720 may be configured to perform actions performed by the processing unit 610, and the input-output interface 710 may be configured to perform actions performed by the communication unit 620, which are not described in detail.

Optionally, the communication device 700 may further comprise at least one memory 730 for storing program instructions and/or data. Memory 730 is coupled to processor 720. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. Processor 720 may operate in conjunction with memory 730. Processor 720 may execute program instructions stored in memory 730. At least one of the at least one memory may be integrated with the processor.

In an embodiment of the present application, the memory 730 may be a nonvolatile memory, such as a hard disk (HARD DISK DRIVE, HDD) or a Solid State Disk (SSD), or may be a volatile memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in embodiments of the present application may also be circuitry or any other device capable of performing memory functions for storing program instructions and/or data.

In an embodiment of the present application, processor 720 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, where the methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.

Fig. 8 shows a communication apparatus 800 according to an embodiment of the present application, for implementing the communication method according to the present application. The communication device 800 may be a communication device to which the communication method according to the embodiment of the present application is applied, or may be a component in a communication device, or may be a device that can be used in a matching manner with a communication device. The communication device 800 may be a first terminal device and/or a network apparatus. The communication device 800 may be a system-on-chip or a chip. In the embodiment of the application, the chip system can be formed by a chip, and can also comprise the chip and other discrete devices. Some or all of the communication methods provided in the above embodiments may be implemented by hardware or software, and when implemented by hardware, the communication apparatus 800 may include: an input interface circuit 801, a logic circuit 802, and an output interface circuit 803.

Optionally, taking the function of the device for implementing the receiving end as an example, the input interface circuit 801 may be used to perform the above-mentioned receiving action performed by the communication unit 620, the output interface circuit 803 may be used to perform the above-mentioned sending action performed by the communication unit 620, and the logic circuit 802 may be used to perform the above-mentioned action performed by the processing unit 610, which is not repeated.

Alternatively, the communication device 800 may be a chip or an integrated circuit when embodied.

Some or all of the operations and functions performed by the communication device described in the above method embodiments of the present application may be implemented by a chip or an integrated circuit.

An embodiment of the present application provides a computer-readable storage medium storing a computer program including instructions for performing the above-described method embodiments.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the above-described method embodiments.

The embodiment of the application provides a communication system which comprises the first terminal device and/or network equipment. For example, the terminal device may be used to perform the method as shown in fig. 3. The communication system may further include a second terminal device according to the method embodiment, and the action performed by the second terminal device may refer to the first terminal device.

It is to be appreciated that the processor in embodiments of the application may be a central processing unit (central processing unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application Specific Integrated Circuits (ASICs), field programmable gate arrays (field programmable GATE ARRAY, FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc., that contain an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., SSD), etc.

It is noted that a portion of this patent document contains material which is subject to copyright protection. The copyright owner has reserved copyright rights, except for making copies of patent documents or recorded patent document content of the patent office.

The network device in the above-described respective apparatus embodiments corresponds to the terminal device and the network device or the terminal device in the method embodiments, the respective steps are performed by respective modules or units, for example, the communication unit (transceiver) performs the steps of receiving or transmitting in the method embodiments, and other steps than transmitting and receiving may be performed by the processing unit (processor). Reference may be made to corresponding method embodiments for the function of a specific unit. Wherein the processor may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between two or more computers. Furthermore, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with one another in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative logical blocks (illustrative logical block) and steps (steps) described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium.

The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

The first terminal device determines a first sequence, the first sequence and the second sequence satisfying complementary characteristics, the second sequence being used by the second terminal device to transmit a second uplink signal, the complementary characteristics satisfying the following conditions: the sliding autocorrelation values of the first sequence belong to a first set, the sliding autocorrelation values of the second sequence belong to a second set, any sliding autocorrelation value in the first set corresponds to one sliding offset value, and any sliding autocorrelation value in the second set corresponds to one sliding offset value; when a first sliding offset value is non-zero, the sum of the sliding autocorrelation values in the first set corresponding to the first sliding offset value and the sliding autocorrelation values in the second set corresponding to the first sliding offset value is zero; when a first sliding offset value is zero, a sum of sliding autocorrelation values in the first set corresponding to the first sliding offset value and sliding autocorrelation values in the second set corresponding to the first sliding offset value is non-zero;

The first terminal device generates a first uplink signal according to the first sequence;

the first terminal device transmits the first uplink signal.

2. The method of claim 1, wherein the first sequence consists of a first subsequence and a second subsequence, the first subsequence and the second subsequence satisfying the complementary property; and/or the number of the groups of groups,

The second sequence consists of a third subsequence and a fourth subsequence, the third and fourth subsequences satisfying the complementary property.

3. The method of claim 1 or 2, wherein the method further comprises:

the first terminal device receives first information from a network device, where the first information is used to instruct or configure the first terminal device to generate a first uplink signal using the first sequence.

4. A method according to any of claims 1-3, wherein the first information further comprises at least one of:

A base sequence comprised by the first sequence;

the first sequence comprises an index number of a base sequence or an index number of a base sequence group where the base sequence is located;

a sequence group index number where the first sequence is located;

the first sequence is at the index number of the sequence group.

5. The method according to claim 4, wherein the first information is further used to indicate a composition and/or a composition order in which the first sequence is obtained from the base sequence.

6. The method of any one of claims 1-5, wherein the first sequence consists of a first subsequence and a second subsequence;

wherein the first subsequence is the base sequence, and the second subsequence is a sequence that satisfies a complementary property to the base sequence or is the complement of a sequence that satisfies a complementary property to the base sequence; or alternatively

The first subsequence is a sequence which meets the complementary characteristic with the base sequence or is an inverse sequence of the sequence which meets the complementary characteristic with the base sequence, and the second subsequence is the base sequence;

Wherein the position of the first sub-sequence in the first sequence is located before the second sub-sequence or the position of the first sub-sequence in the first sequence is located after the second sub-sequence.

7. The method according to any of claims 3-5, wherein the first information is carried in a medium access control element, MAC CE, a radio resource control, RRC, message or downlink control information, DCI.

8. The method according to any of claims 1-7, wherein the first terminal device generating the first uplink signal according to the first sequence comprises:

the terminal device performs line coding by taking the first sequence as a chip unit to generate the first uplink signal; or alternatively

The terminal device generates the first uplink signal with a code sequence of a line code as a chip unit of the first sequence.

9. A method of communication, comprising:

The network device determines a first sequence and a second sequence, the first sequence and the second sequence satisfying complementary characteristics, the first sequence being used for the first terminal device to transmit a first uplink signal, the second sequence being used for the second terminal device to transmit a second uplink signal, the complementary characteristics satisfying the following conditions: the sliding autocorrelation values of the first sequence belong to a first set, the sliding autocorrelation values of the second sequence belong to a second set, any sliding autocorrelation value in the first set corresponds to one sliding offset value, and any sliding autocorrelation value in the second set corresponds to one sliding offset value; when a first sliding offset value is non-zero, the sum of the sliding autocorrelation values in the first set corresponding to the first sliding offset value and the sliding autocorrelation values in the second set corresponding to the first sliding offset value is zero; when a first sliding offset value is zero, a sum of sliding autocorrelation values in the first set corresponding to the first sliding offset value and sliding autocorrelation values in the second set corresponding to the first sliding offset value is non-zero;

the network device receives the first uplink signal from the first terminal apparatus.

10. The method of claim 9, wherein the method further comprises:

the network device receives the second uplink signal from the second terminal apparatus.

11. The method of claim 9 or 10, wherein the first sequence consists of a first subsequence and a second subsequence, the first and second subsequences satisfying the complementary property; and/or the number of the groups of groups,

12. The method of any one of claims 9-11, wherein the method further comprises:

The network device transmits first information, where the first information is used to instruct or configure the first terminal device to generate a first uplink signal using the first sequence.

13. The method of any of claims 9-12, wherein the first information further comprises at least one of:

A base sequence comprised by the first sequence;

a sequence group index number where the first sequence is located;

the first sequence is at the index number of the sequence group.

14. The method according to claim 13, wherein the first information is further used to indicate the manner and/or order of composition in which the first sequence was obtained from the base sequence.

15. The method of any one of claims 9-14, wherein the first sequence consists of a first subsequence and a second subsequence;

16. The method according to any of claims 9-14, wherein the first information is carried in a medium access control, MAC CE, radio resource control, RRC, message or downlink control information, DCI.

17. A communication device, comprising: processor instructions for executing the one or more computer programs stored in memory to cause the communication device to perform the method of any of claims 1-8 or to cause the communication device to perform the method of any of claims 9-16.

18. The apparatus of claim 17, wherein the communication apparatus further comprises the memory or a transceiver for the communication apparatus to communicate.

19. A computer readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1-8 or causes the computer to perform the method of any one of claims 9-16.

20. A communication system comprising a first terminal device for performing the method according to any of claims 1-8 and a network device for performing the method according to any of claims 9-16.