Wireless communication methods, terminal devices and network devices

Abstract

Provided are wireless communication methods, terminal devices and network devices. A method comprises: a terminal device receiving one or more of the following sent by a network device: a first signal and a second signal, the second signal being received on the basis of the first signal; and the second signal, wherein the first signal and / or the second signal are obtained by superimposing a first sequence and / or a second sequence on a time domain or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal are received by a first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of a second receiver of the terminal device. In the present application, the first sequence and / or the second sequence are superimposed on OFDM to obtain the first signal and / or the second signal, so that symbol energy of the first signal and / or the second signal can be uniformly distributed in the time domain, thereby helping to improve the robustness of the first signal and / or the second signal against timing and frequency deviations.

Description

Wireless communication methods, terminal equipment and network equipment Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal device, and network device. Background Technology

[0002] To reduce the power consumption of terminal devices, communication systems have introduced low-power receivers. When the terminal device is idle, the main receiver can be turned off or put into deep sleep mode, and the first and / or second signals can be listened to only through the low-power receiver. However, how to design the first and / or second signals is an urgent problem to be solved. Summary of the Invention

[0003] This application provides a wireless communication method, terminal device, and network device. The various aspects covered by this application are described below.

[0004] In a first aspect, a wireless communication method is provided, comprising: a terminal device receiving one or more of the following from a network device: a first signal and a second signal, wherein the second signal is received based on the first signal; the second signal; wherein the first signal and / or the second signal is obtained by superimposing a first sequence and / or a second sequence on the time or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal is received by a first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of a second receiver of the terminal device.

[0005] In a second aspect, a wireless communication method is provided, comprising: a network device sending one or more of the following to a terminal device: a first signal and a second signal, wherein the second signal is received based on the first signal; the second signal; wherein the first signal and / or the second signal is obtained by superimposing a first sequence and / or a second sequence on the time or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal is received by a first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of a second receiver of the terminal device.

[0006] Thirdly, a terminal device is provided, comprising: a receiving unit for receiving one or more of the following transmitted by a network device: a first signal and a second signal, wherein the second signal is received based on the first signal; the second signal; wherein the first signal and / or the second signal is obtained by superimposing a first sequence and / or a second sequence on the time or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal is received by a first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of the second receiver of the terminal device.

[0007] Fourthly, a network device is provided, comprising: a transmitting unit for transmitting one or more of the following to a terminal device: a first signal and a second signal, wherein the second signal is received based on the first signal; the second signal; wherein the first signal and / or the second signal is obtained by superimposing a first sequence and / or a second sequence on the time or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal is received by a first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of a second receiver of the terminal device.

[0008] Fifthly, a terminal device is provided, including a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to invoke the computer programs in the memory, causing the terminal device to perform some or all of the steps in the method of the first aspect.

[0009] In a sixth aspect, a network device is provided, including a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to invoke the computer programs in the memory to cause the network device to perform some or all of the steps in the method of the second aspect.

[0010] Seventhly, embodiments of this application provide a communication system including the aforementioned terminal device and / or network device. In another possible design, the system may further include other devices that interact with the terminal device or network device as described in the embodiments of this application.

[0011] Eighthly, embodiments of this application provide a computer-readable storage medium storing a computer program that causes a communication device (e.g., a terminal device or a network device) to perform some or all of the steps in the methods described above.

[0012] Ninthly, embodiments of this application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program operable to cause a communication device (e.g., a terminal device or a network device) to perform some or all of the steps of the methods described in the foregoing aspects. In some implementations, the computer program product may be a software installation package.

[0013] In a tenth aspect, embodiments of this application provide a chip including a memory and a processor, the processor being able to call and run a computer program from the memory to implement some or all of the steps described in the methods of the foregoing aspects.

[0014] This application proposes a wireless communication method in which a first signal and / or a second signal received by a first receiver of a terminal device are obtained by superimposing a first sequence and / or a second sequence onto the time or frequency domain of OFDM. The power consumption of the first receiver is lower than that of the second receiver of the terminal device. Using the first sequence and / or the second sequence superimposed on OFDM to obtain the first signal and / or the second signal can achieve a uniform distribution of the symbol energy of the first signal and / or the second signal in the time domain, which helps to improve the robustness of the first signal and / or the second signal to timing and frequency deviations. Attached Figure Description

[0015] Figure 1 shows the wireless communication system 100 used in an embodiment of this application.

[0016] Figure 2 is a schematic flowchart of a wireless communication method according to an embodiment of this application.

[0017] Figure 3 is a schematic diagram of the low-power wake-up signal (LP-WUS) generation process.

[0018] Figure 4 is an example diagram of an OFDM symbol for transmitting a second signal.

[0019] Figure 5 is an example diagram of the OFDM symbol structure for transmitting the second signal.

[0020] Figure 6 is a schematic diagram of the structure of the first signal.

[0021] Figure 7 is a schematic diagram of a terminal device according to an embodiment of this application.

[0022] Figure 8 is a schematic diagram of a network device according to an embodiment of this application.

[0023] Figure 9 is a schematic structural diagram of a communication device according to an embodiment of this application. Detailed Implementation

[0024] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0025] Figure 1 illustrates a wireless communication system 100 according to an embodiment of this application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located within that coverage area.

[0026] Figure 1 illustrates an exemplary network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices, and each network device may include other terminal devices within its coverage area. This application embodiment does not limit this.

[0027] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

[0028] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: 5th generation (5G) systems or new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as 6th generation mobile communication systems, satellite communication systems, and so on.

[0029] The terminal device in this application embodiment can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in this application embodiment can be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects, and machines, such as a handheld device with wireless connectivity, vehicle-mounted device, etc. The terminal devices in the embodiments of this application can be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, and smart homes, etc. Optionally, the UE can act as a base station. For example, the UE can act as a scheduling entity, providing sidelink signals between UEs in V2X or D2D, etc. For example, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through a base station.

[0030] The network device in this application embodiment can be a device for communicating with a terminal device. This network device can also be called an access network device or a wireless access network device, such as a base station. In this application embodiment, the network device can refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master MeNB, secondary SeNB, multi-mode radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. Base stations can also be mobile switching centers, devices that perform base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, network-side devices in 6G networks, and devices that perform base station functions in future communication systems. Base stations can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0031] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0032] In some deployments, the network device in this application embodiment may refer to a CU or a DU, or the network device may include both a CU and a DU. The gNB may also include an AAU.

[0033] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0034] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (e.g., a cloud platform).

[0035] In cellular networks, terminal devices (e.g., those in 5G networks) typically consume tens of milliwatts even when not transmitting or receiving any data. This idle power consumption is due to the need for the terminal device to perform periodic measurements and check for potential paging messages. Therefore, without external power support, IoT devices are difficult to implement in practice.

[0036] To address the aforementioned issues, communication systems (e.g., NR) have introduced low-power receivers. When the terminal device is idle, it can turn off the main receiver or put it into deep sleep mode, listening to the first and / or second signals solely through the low-power receiver, thereby reducing the terminal device's power consumption. However, how to design the first and / or second signals remains a pressing issue.

[0037] For example, if the second signal is LP-WUS, when the main receiver of the terminal device is woken up, the terminal device enters the radio resource control (RRC) connected state, and the low-power receiver of the terminal device can continuously receive LP-WUS. Therefore, the low-power receiver is independent of the main receiver; that is, the main receiver can be turned off when the low-power receiver is active and searching for potential LP-WUS. Considering that the terminal device may be listening to LP-WUS during the reduced-power physical downlink control channel (PDCCH) monitoring period, false wake-ups may occur when multiple terminal devices are listening to LP-WUS simultaneously. Therefore, how to embed LP-WUS into the current communication system to ensure the low-power performance of the terminal is an urgent problem to be solved.

[0038] For example, the first signal is a low-power synchronization signal (LP-SS). In systems based on low-power wake-up signals, time and frequency synchronization are also crucial. When the master receiver is configured with a long "off mode" or sleep period, the clock frequency of the terminal device may drift. Clock frequency drift or frequency error can cause inaccurate duty cycles in the low-power wake-up receiver (LP-WUR). Therefore, the low-power receiver of the terminal device can be configured to detect and receive periodic LP-SS to achieve accurate synchronization at the low-power receiver and wake up the master receiver via LP-WUR. Thus, how to design the LP-SS is also a technical problem that needs to be solved.

[0039] To address the aforementioned issues, this application proposes a wireless communication method. The first signal and / or second signal received by the first receiver of the terminal device are obtained by superimposing the first sequence and / or the second sequence onto the time or frequency domain of OFDM. The power consumption of the first receiver is lower than that of the second receiver of the terminal device. Using the first sequence and / or the second sequence superimposed on OFDM to obtain the first signal and / or the second signal allows for a uniform distribution of the symbol energy of the first signal and / or the second signal in the time domain, which helps improve the robustness of the first signal and / or the second signal to timing and frequency deviations.

[0040] The following describes a wireless communication method according to an embodiment of this application with reference to FIG2. FIG2 is a schematic flowchart of a wireless communication method according to an embodiment of this application. The scheme shown in FIG2 includes step S210.

[0041] In step S210, the network device sends one or more of the following to the terminal device: a first signal and a second signal; a second signal. Correspondingly, the terminal device receives one or more of the following from the network device: the first signal and the second signal; a second signal.

[0042] In some implementations, the terminal device includes a first receiver and a second receiver, the power consumption of the first receiver is lower than that of the second receiver, and the first signal and / or the second signal is received by the first receiver of the terminal device, or in other words, the first signal and / or the second signal is monitored by the terminal device through the first receiver.

[0043] In some implementations, the power consumption of the first receiver is lower than that of the second receiver. Therefore, the first receiver can be the low-power receiver (LR) mentioned above, and the second receiver can be the main receiver (MR) mentioned above.

[0044] In some implementations, the first signal and / or the second signal are received by the LR, and the first signal and / or the second signal can also be referred to as "low-power signals".

[0045] In some implementations, the first receiver may also be referred to as a low-power wake-up module or LP-WUR, and the second receiver may also be referred to as the "main communication module".

[0046] In some implementations, the two receiving modules are either integrated into one receiving module, i.e., the first receiver and the second receiver are two separate modules, or the first receiver and the second receiver are integrated into one module.

[0047] In some implementations, the terminal device receives a first signal and a second signal sent by the network device. The second signal is received based on the first signal. That is to say, after receiving the first signal sent by the network device, the terminal device receives the second signal sent by the network device based on the received first signal.

[0048] In some implementations, the first signal is used for time-frequency synchronization. Accordingly, the terminal device performs synchronization based on the received first signal.

[0049] In some implementations, the second signal is used to wake up the second receiver.

[0050] In some implementations, the first signal is the LP-SS mentioned above. LP-SS is a periodic signaling used by LP-WUR to obtain and maintain time and frequency synchronization.

[0051] In some implementations, the second signal is LP-WUS as mentioned above. For example, if the first signal is LP-SS and the second signal is LP-WUS, the terminal device's LP-WUS can first receive LP-SS, use LP-SS for time and frequency synchronization, and can also use LP-SS for radio resource management (RRM) measurements to determine the potential coverage and detectability for further LP-WUS reception and detection.

[0052] In some implementations, the first signal is LP-SS, and the period of LP-SS supports one or more of the following: 80ms; 160ms; 320ms; 640ms; 1280ms; 2560ms; 5120ms; 10240ms.

[0053] In some implementations, the modulation method of the first signal and / or the second signal can be a low-rate modulation method, that is, the modulation method of the first signal and / or the second signal can be a modulation method that can modulate the first signal and / or the second signal into a low-rate signal.

[0054] In some implementations, the low-rate modulation method can be one or more of the following: binary amplitude shift keying (OOK); pulse modulation; modulation based on a specific function.

[0055] In some implementations, the modulation scheme of the first signal and / or the second signal is OOK. For example, the second signal is LP-WUS, and the information bits of LP-WUS can be carried by a modulated OOK sequence or OOK bits.

[0056] In some implementations, the modulation scheme of the first signal and / or the second signal is OOK, and the first sequence and / or the second sequence corresponding to the first signal and / or the second signal based on OOK modulation can be complex-valued sequences. For example, the signal sequence of the first signal after OOK modulation is an OOK sequence. The OFF symbols in the OOK sequence can be mapped to an all-zero sequence, and the ON symbols in the OOK sequence can be mapped to the first sequence, which is a specific short complex-valued sequence. These sequences are then concatenated to obtain a pre-discrete fourier transformation (DFT) sequence.

[0057] In some implementations, if the modulation scheme of the first signal and / or the second signal is OOK, the first receiver can detect the first signal and / or the second signal by correlation.

[0058] In some implementations, the modulation scheme of the first signal and the second signal is OOK. Considering that the LP-WUR will detect the first signal and the second signal simultaneously, the OOK configuration of the first signal and the second signal can be the same to make the detection of the LP-WUR simpler.

[0059] In some implementations, the encoding methods for the first signal and / or the second signal include one or more of the following: inverted non-return-to-zero encoding; Manchester encoding; unipolar return-to-zero encoding; differential biphase encoding; Miller encoding; modified Miller code encoding; pulse-interval encoding; pulse position encoding; biphase interval code encoding; pulse width encoding.

[0060] In some implementations, the first and / or second signals can be encoded and then supplemented with a cyclic redundancy check (CRC).

[0061] In some implementations, the first signal and / or the second signal are generated by the first sequence and / or the second sequence, or in other words, the first signal is generated by the first sequence and / or the second signal is generated by the second sequence.

[0062] In some implementations, the first signal and / or the second signal are generated by the first sequence and / or the second sequence. This can be understood as the first signal and / or the second signal being obtained by superimposing the first sequence and / or the second sequence onto the OFDM. In other words, the first signal is obtained by superimposing the first sequence onto the OFDM, and the second signal is obtained by superimposing the second sequence onto the OFDM.

[0063] In the embodiments of this application, the timing of superimposing the first sequence and / or the second sequence with OFDM is not limited. For example, the first sequence may be superimposed with OFDM before encoding, or the first sequence may be superimposed with OFDM after encoding. As another example, the first sequence may be superimposed with OFDM in the time domain, or the first sequence may be superimposed with OFDM in the frequency domain.

[0064] In some implementations, the first sequence and / or the second sequence are first signals and / or second signals superimposed in the time domain of OFDM, and thus the first sequence and / or the second sequence are time-domain sequences.

[0065] In some implementations, the first sequence and / or the second sequence are first signals and / or second signals obtained by superimposing OFDM in the time domain. This can be understood as the first sequence and / or the second sequence being superimposed on OFDM before DFT / LS processing. That is, the first sequence and / or the second sequence in the time domain are superimposed on OFDM, and then processed by DFT / LS and IFFT to obtain the first signal and / or the second signal. For example, the second signal is LP-WUS. Referring to Figure 3, which illustrates the generation process of LP-WUS, based on N′ LP-WUS timings, LP-WUS is modulated using OOK-4 modulation. The OOK ON symbols of the modulated LP-WUS correspond to the second sequence. Therefore, the second sequence can be superimposed on OFDM before DFT / least square (LS) processing (e.g., during signal generation and modification stages).

[0066] In some implementations, the first sequence and / or the second sequence are first signals and / or second signals superimposed in the frequency domain of OFDM, and thus the first sequence and / or the second sequence are frequency domain sequences.

[0067] In some implementations, the first sequence and / or the second sequence are first signals and / or second signals obtained by superimposing OFDM in the frequency domain. This can be understood as the first sequence and / or the second sequence being superimposed with OFDM before IFFT processing. The superimposed first sequence and / or second sequence are then frequency domain sequences; that is, the first sequence and / or the second sequence can be superimposed with OFDM in the frequency domain to obtain the first signal and / or the second signal. For example, the second signal is LP-WUS. Referring to Figure 3, which illustrates the generation process of LP-WUS, based on N′ LP-WUS timings, LP-WUS is modulated using OOK-4 modulation. The OOK ON symbols of the modulated LP-WUS correspond to the second sequence. Therefore, it is superimposed with OFDM before inverse fast fourier transform (IFFT) processing (e.g., during the sub-carrier (SC) stage).

[0068] In some implementations, if the first signal is LP-SS, the timing information of the first signal is determined based on the timing information of the third signal. For example, the time-domain resources occupied by the first signal can be used by the terminal device to determine the timing information of the third signal, which can be frame / subframe / time slot / symbol timing information.

[0069] In some implementations, the third signal includes one or more of the following: a synchronization signal / PBCH block (SSB); an SSB burst set; or the primary synchronization signal (PSS) / secondary synchronization signal (SSS) in the SSB.

[0070] In some implementations, the time-domain resources occupied by the first signal overlap with those occupied by the third signal. This can be understood as the first and third signals being multiplexed in the same OFDM symbol. Therefore, the first and third signals can share the same timing information. For example, if the first signal is LP-SS and the third signal includes SSB, and LP-SS and SSB are multiplexed in the same OFDM symbol, the terminal device can detect LP-SS and determine the timing information based on the SSB configuration.

[0071] In some implementations, the time-domain resources occupied by the first signal and the time-domain resources occupied by the third signal may partially or completely overlap.

[0072] In some implementations, in order to achieve frequency domain multiplexing (FDMed) with SSB, the same number of OFDM symbols can be supported for transmitting LP-SS and SSB.

[0073] In some implementations, the first and third signals have a quasi-colocation (QCL) relationship. For example, the third signal includes an SSB burst set, and the first signal is an LP-SS. LP-SS is based on beam transmission, and an LP-SS set is defined, which includes multiple LP-SSs (LP-SS#1, LP-SS#2, LP-SS#3, ..., LP-SS#M-1). The indices of the LP-SSs in the LP-SS set are 0, 1, ..., M-1, where M can be equal to or less than the number of SSBs in the SSB burst. Assuming that LP-SSs and SSBs with the same index are QCLed, the QCL relationship between LP-SSs and SSBs can be determined based on the index of the LP-SSs in the LP-SS set. Network devices can naturally transmit them using the same transmitter (TX) beam, and terminal devices can also determine the associated SSBs based on the detected LP-SSs, thereby determining the timing information of the SSBs.

[0074] In some implementations, the information bits of the second signal are carried in superimposed OFDM, or in other words, the information bits of the second signal are carried in superimposed OFDM symbols. For example, the second signal is LP-WUS, the modulation scheme of the second signal is OOK, and a single second sequence is located on the duration of each OOK ON symbol or OFDM symbol. The OFDM-based LP-WUR can obtain the entire information bit of LP-WUS through superimposed OFDM. This method can randomize the superimposed sequence used over time, which may mitigate the impact of inter-cell interference, thereby achieving better coverage performance. The second sequence can be predetermined from multiple sequences, such as from multiple candidate sequences, i.e., selecting a sequence for each OOK ON symbol. The OFDM-based LP-WUR obtains at least the information bits of LP-WUS through superimposed OFDM, which carries all the information bits of LP-WUS.

[0075] For ease of understanding, the following example, using Figure 4, illustrates a scheme where superimposed OFDM carries the information bits of the second signal.

[0076] Referring to Figure 4, assuming the second signal is LP-WUS, the S-sequence is the second sequence, which can be selected from multiple candidate sequences, such as a sequence selected from S(n). In each OFDM symbol, 4 bits can be carried by OFDM on two OOK ON symbols, where there are assumed to be N information bits. LP-WUS supports OOK-4 modulation and uses Manchester coding. Since the information bits are mapped to the superimposed OFDM, in this case, the OFDM-based receiver can only obtain information from the superimposed OFDM. Taking OOK-4 as an example, one LP-WUS carries N information bits, occupying N / 4 OFDM symbols. If the entire information of one LP-WUS includes 24 bits, a total of N / 4 = 6 OFDM symbols are occupied without repetition. Alternatively, the S-sequence can also be a specific sequence, and only one candidate second sequence can be transmitted on each OOK ON symbol. The specific candidate second sequence can be fixed by mapping the same sequence for each OOK ON symbol, or it can be mapped to a different second sequence on each OOK ON symbol according to a predetermined rule. Both envelope detection-based receivers and OFDM-based receivers can detect LP-WUS, where all N information bits of LP-WUS are carried / modulated in each OFDM symbol by the OOK ON / OFF mode.

[0077] In some implementations, the information bits of the second signal are associated with one or more of the following: the information content carried by the second signal; the encoding rate of the second signal; the number of paging occasions (POs) of the second signal; the number of terminal devices indicated by the POs of the second signal; and the number of times the second signal is monitored.

[0078] In some implementations, the information carried by the second signal can be understood as information used to wake up the second receiver; therefore, the information carried by the second signal can also be called "wake-up information." For example, if the second signal is LP-WUS, the information carried by LP-WUS can be wake-up information used to wake up the second receiver of a specific terminal device.

[0079] In some implementations, the coding rate of the second signal can be understood as the proportion of the useful (non-redundant) portion of the data stream of the encoded second signal. For example, if the second signal is LP-WUS, the modulation method of LP-WUS is OOK, and the encoding method is Manchester encoding, then the proportion of OOK ON symbols after modulation and encoding of LP-WUS is the coding rate of the second signal.

[0080] In some implementations, the number of POs of the second signal can be understood as the number of POs or PO subgroups of the second signal.

[0081] In some implementations, the number of terminal devices indicated by the PO of the second signal can be understood as the number of terminal devices indicated by the PO of the second signal, or the number of terminal device groups indicated by the PO subgroup.

[0082] In some implementations, the number of times the second signal is listened to can be understood as the number of times the terminal device can listen to the second signal.

[0083] In some implementations, the number of times the second signal is monitored is correlated with the number of low-power occasions (LOs) and / or monitoring occasions (MOs) for the second signal. For example, if the second signal is LP-WUS, LOs can be understood as opportunities for low-power signal transmission. Due to the characteristics of LP-WUS systems, the spectral efficiency of LP-WUS is much lower than that of PDCCH. In this case, multiple monitoring occasions (i.e., MOs) for wake-up signals can be configured for different LOs associated with different terminal device subgroups. Paging early indication (PEI) and / or point of sale (PO) can be associated with MOs, rather than POs being associated with LOs. Each LP-WUS has one LO, but multiple LOs for one LP-WUS are also supported. It is also possible for an LP-WUS system to have only LOs and no MOs, or only MOs and no LOs, or both. The number of LP-WUS monitoring occurrences can be correlated with the number of LOs and MOs, the number of LOs, or the number of MOs within a LO.

[0084] In some implementations, if the second sequence is superimposed on OFDM before encoding, the size of the information bits of the second signal is related to the information content carried by the second signal. For example, if the second signal is LP-WUS and the modulation scheme of LP-WUS is OOK, then the number of OOK ON symbols in the modulated LP-WUS depends on the information content carried by LP-WUS. Therefore, the size of the information bits of the second sequence mapped by the OOK ON symbols after superimposing OFDM is also related to the information content carried by LP-WUS. The more OOK ON symbols in LP-WUS, the more OFDM transmission opportunities there are (one OOK-ON symbol can be regarded as one OFDM transmission opportunity). The wake-up information carried by LP-WUS affects the coverage of OFDM. If the modulated LP-WUS has no OOK ON symbols (for example, the modulated LP-WUS is 0000), then OFDM cannot be superimposed on the second sequence.

[0085] In some implementations, if the second sequence is superimposed on OFDM after encoding, the size of the information bits of the second signal is associated with the information content carried by the second signal and / or the encoding rate of the second signal.

[0086] In some implementations, the size of the information bits of the second signal is associated with the number of point objects (POs) indicated by the information carried by the second signal and / or the number of terminal devices indicated by the POs of the second signal. For example, the maximum value of the information bits of the second signal is associated with the maximum number of POs or the maximum number of PO subgroups, etc.

[0087] In some implementations, for terminal devices in the RRC_IDLE / RRC_INACTIVE state, the size of the information bits of the second signal is related to the number of terminal devices indicated by the PO of the second signal and / or the number of times the second signal is monitored. For example, if the second signal is LP-WUS, the number of terminal devices indicated by the PO of LP-WUS and the number of MOs in the LO of LP-WUS can determine the size of the information bits of LP-WUS.

[0088] In some implementations, the size of the information bits of the second signal is related to the number of PO subgroups of the second signal. For example, the second signal is LP-WUS, the modulation scheme of LP-WUS is OOK, and the size of the information bits of LP-WUS obtained by superimposing the second sequence mapped by each OOK ON symbol with OFDM is at least the maximum number of PO subgroups, such as 8, 16, 32, 64, etc.

[0089] In some implementations, the size of the information bits of the second signal is also associated with one or more of the following: network configuration information; the number of cells in the tracking area; the density of terminal devices within the cells; and the current arrival traffic volume. For example, the second signal is LP-WUS, and the size of the LP-WUS information bits can depend on the number of cells in the tracking area, the density of terminal devices within the cells, and the current arrival traffic volume, etc.

[0090] In some implementations, the first sequence and the second sequence have a first association relationship.

[0091] In some implementations, the first association is used to indicate one or more of the following: the first sequence is the same as the second sequence; the first sequence is different from the second sequence; the modulation order of the first sequence is the same as the modulation order of the second sequence; the modulation order of the first sequence is different from the modulation order of the second sequence; the modulation order of the first sequence is greater than or equal to the modulation order of the second sequence.

[0092] In some implementations, the first sequence is the same as the second sequence, that is, the first signal and the second signal can be generated by the same sequence.

[0093] In some implementations, the first sequence is different from the second sequence; that is, the first signal and the second signal can be generated by different sequences.

[0094] In some implementations, the modulation order of the first sequence and the adjustment order of the second sequence can be the same. For example, if the first signal is LP-SS and the second signal is LP-WUS, and both LP-WUS and LP-SS are modulated by OOK, then the modulation order M1 of the first sequence corresponding to LP-SS and the adjustment order M2 of the second sequence corresponding to LP-WUS will always be the same.

[0095] In some implementations, the modulation order of the first sequence and the adjustment order of the second sequence can be different. For example, if the first signal is LP-SS and the second signal is LP-WUS, and both LP-WUS and LP-SS are modulated by OOK, then the modulation order M1 of the first sequence corresponding to LP-SS and the adjustment order M2 of the second sequence corresponding to LP-WUS are different.

[0096] In some implementations, the modulation order of the first sequence is greater than or equal to the modulation order of the second sequence; in other words, the modulation order of the second sequence cannot be greater than the modulation order of the first sequence. For example, the first signal is LP-SS, the second signal is LP-WUS, and both LP-WUS and LP-SS are modulated using OOK. The modulation order M1 of the first sequence corresponding to LP-SS and the modulation order M2 of the second sequence corresponding to LP-WUS satisfy M1≥M2.

[0097] In some implementations, the modulation scheme of the first signal and / or the second signal is OOK. The data transmission rate of the first signal and / or the second signal can be adjusted by changing the modulation order and / or the sub-carrier space (SCS). For example, when the modulation order of OOK is 1, for OOK-1, each OFDM symbol can only transmit one OOK symbol. If different data transmission rates are required, this can be achieved by adjusting the SCS. As another example, when the modulation order of OOK is M, for OOK-M, each OFDM symbol can transmit M OOK symbols. Different data transmission rates can be supported by adjusting the values ​​of M and / or SCS.

[0098] In some implementations, the data transmission rate of the first and / or second signal can be determined based on channel quality. For example, the second signal is LP-WUS. In actual LP-WUS transmission, the performance of LP-WUS varies depending on the channel quality. When the channel quality is good, a higher data transmission rate can be used to transmit LP-WUS, while when the channel quality is poor, a lower data transmission rate is required.

[0099] In some implementations, the first sequence and / or the second sequence is determined based on one or more of the following: a pre-configured sequence; a predefined sequence; or one or more candidate sequences.

[0100] In some implementations, the pre-configured sequence can be understood as the sequence configured by the network device.

[0101] In some implementations, a predefined sequence can be understood as a sequence defined by the protocol.

[0102] In some implementations, one or more candidate sequences can be understood as one or more candidate first sequences and / or second sequences.

[0103] In some implementations, candidate sequences are generated based on base sequences.

[0104] In some implementations, the base sequence can be one or more of the following: ZC sequence; Gold sequence; M sequence; computer search sequence.

[0105] In some implementations, candidate sequences are generated based on base sequences. This can be understood as the candidate sequence being obtained from the base sequence through at least one of the following operations: cyclic shift; expansion; truncation.

[0106] In some implementations, the candidate sequence is obtained by cyclically shifting the base sequence. This can be understood as the candidate sequence being obtained by cyclically shifting the base sequence. Circular shifting is an operation that changes the position of sequence elements without altering the sequence generation mechanism. Circular shifting can be implemented in hardware using shift registers, avoiding additional complex calculations.

[0107] In some implementations, a circular shift operation may include a circular left shift and / or a circular right shift.

[0108] In some implementations, changing the step size of the cyclic shift of the base sequence can generate multiple candidate sequences with different characteristics. By choosing different cyclic shift step sizes, it is possible to reduce the peak values ​​of cross-correlation between sequences.

[0109] In some implementations, the step size of the cyclic shift includes one or more.

[0110] In some implementations, the candidate sequence is obtained by expanding the base sequence. This can be understood as the candidate sequence being obtained by adding bits to the base sequence.

[0111] In some implementations, the expansion operation includes one or more of the following: cyclic expansion; two's complement; extraction.

[0112] In some implementations, the candidate sequence is obtained by truncating the base sequence. This can be understood as the candidate sequence being obtained by truncating the base sequence to a specific length.

[0113] In some implementations, candidate sequences are obtained by inserting zeros before and / or after expanding the base sequence, with the total number of zeros determined by the formula N0 = L - N; where L is the length of the candidate sequence and N is the length of the base sequence. For example, the base sequence is a ZC sequence X. q It can be done through formula Let N be the root sequence, where q is the root sequence and N is the root sequence. ZC For the length of each sequence, X q Inserting zeros before expansion yields the sequence s(n) = [0, 0, ..., X]. q (0),…X q (N ZC ―1),0,0…0]n=0,1…L zc―1 That is, in X q Zero-padding is performed before and after, with a total of L zeros. zc ―N zc L zc The length of the final candidate sequence.

[0114] In some implementations, the base sequence is a ZC sequence, and the candidate sequence is obtained by cyclic expansion of the ZC sequence. For example, if the base sequence is a ZC sequence, it can be obtained using the formula... Let N be the root sequence, where q is the root sequence and N is the root sequence. ZC For the length of each sequence, N ZC The value of can be an odd number (or a prime number) such that N ZC Satisfying N ZC <L ZC ―2×G0,L ZC G0 is the length of the candidate sequence, which is a system-defined value. G0 is related to the length of the DFT / Fast Fourier Transform (FFT) and the modulated result. The value of G0 is greater than or equal to 0. The candidate sequence can be expressed by the formula S(n) = x q (n mod N ZC This can be determined, or through the formula S(n) = e jα x q (n mod N ZC ) is determined, where α is the system setting.

[0115] In some implementations, the base sequence is a ZC sequence, and the candidate sequence is obtained by cyclic shifting and expanding the ZC sequence. For example, if the base sequence is a ZC sequence, it can be obtained using the formula... This means that the ZC sequence can be cyclically expanded to obtain the sequence S(n) = x. q (n mod N ZC n = 0, 1, ..., L ZC―1, S(n) can be further cyclically shifted to obtain the sequence S′(n)=x q ((n+C V )mod N ZC n = 0, 1, ..., L ZC ―1, where C V This is the step size for the cyclic shift. Before expansion, X... q Zero-padding yields the sequence s(n) = [0, 0, ..., X]. q (0),…X q (N ZC ―1),0,0…0]n=0,1…L zc―1 That is, in X q Zero-padding is performed before and after, with a total of L zeros. zc ―N zc After cyclic shifting and cyclic expansion, s(n) can be used to obtain the candidate sequence s′(n) = [0, 0, ..., Y]. q (0),....Y q (N ZC ―1),0,0…0]n=0,1…L zc―1 , where Y q (j)=x q ((j+C V )mod N ZC j = 0, 1, ... L ZC ―1.

[0116] In some implementations, the base sequence is a ZC sequence, and the root sequence of the ZC sequence can include one or more, that is, the candidate sequence can be generated based on one or more ZC sequences with different root sequences.

[0117] To support multiple candidate sequences and to allow different cells to have different candidate sequences, some implementations use different cyclic shift step sizes and the root sequence of the ZC sequence to generate multiple candidate sequences, or the same root sequence of the ZC sequence with different cyclic shift step sizes to generate multiple candidate sequences. The choice of the root sequence of the ZC sequence directly affects the cross-correlation characteristics between different candidate sequences. Candidate sequences generated with different root sequences have lower cross-correlation, which helps reduce interference, while candidate sequences generated with the same root sequence but different cyclic shift step sizes are easily distinguishable at the receiver. Using a combination of cyclic shift step size and the root sequence of the ZC sequence to generate candidate sequences helps to cope with different timing error situations.

[0118] For multiple supported candidate sequences, the cyclic shift should be evenly distributed throughout the period to avoid concentration at certain positions leading to high cross-correlation. To address different timing error scenarios, in some implementations, the root sequence of ZC and / or the step size of the cyclic shift can be combined according to the first rule.

[0119] In some implementations, the first rule is used to indicate the step size of different cyclic shifts of the same root sequence, which helps to provide good cross-correlation performance while saving spectrum resources.

[0120] In some implementations, the first rule is used to indicate the assignment of different root sequences to adjacent cells to ensure low cross-correlation between candidate sequences corresponding to different cells, thereby reducing interference between cells.

[0121] In some implementations, the first rule indicates that the interval between the indices of the root sequences is greater than the minimum interval that guarantees low cross-correlation between different root sequences. For example, the selection of indices q1 and q2 of two root sequences should satisfy |q1―q2|>Δq, where Δq is the minimum interval that guarantees low cross-correlation between different root sequences.

[0122] In some implementations, the root sequence of the ZC sequence and the step size of the cyclic shift can be configured by the network device. For example, the network device is a gNB, which is configured to use the root sequence of the ZC sequence and the step size of the cyclic shift.

[0123] In some implementations, the root sequence of the ZC sequence and / or the step size of the cyclic shift are determined based on one or more of the following: the modulation order of the first signal and / or the second signal; the length of the base sequence; network load information; channel state information; inter-cell interference; and timing error of the terminal equipment.

[0124] Cyclic shift configurations can generate multiple orthogonal subsequences on the same root sequence. The step size of the cyclic shift should ensure that the cross-correlation between different candidate sequences is minimized. In some implementations, the step size of the cyclic shift is determined based on the modulation order of the first and / or second signals and the length of the base sequence.

[0125] In some implementations, the base sequence is a ZC sequence, and the step size of the cyclic shift satisfies Among them, C V N is the step size of the cyclic shift. ZC is the length of the ZC sequence, and M is the modulation order of the first signal and / or the second signal.

[0126] In some implementations, the root sequence and cyclic shift step size of the ZC sequence are determined based on network load information and channel state information. For example, in actual deployments, the gNB adjusts the root sequence and cyclic shift step size according to real-time network load information and channel state information.

[0127] In some implementations, the root sequence of the ZC sequence is determined based on the inter-cell interference. For example, gNB assigns different root sequences based on the inter-cell interference.

[0128] In some implementations, the step size of the ZC sequence cyclic shift is determined based on the timing error of the terminal device. For example, for terminal devices with large timing errors, the step size of the cyclic shift is adjusted to optimize the receiving performance of the terminal device.

[0129] In some implementations, the base sequence is a Gold sequence, and the candidate sequence is obtained by truncating the Gold sequence. For example, the candidate sequence is a truncated Gold sequence of length 127 or 231.

[0130] In some implementations, the base sequence is the M-sequence. The M-sequence has good cross-correlation properties, at the cost of a limited number of available sequences (fewer than the Gold sequence) and a limited length of consecutive "0"s in the M-sequence.

[0131] In some implementations, the M-sequence is generated based on one or more generator polynomials. For example, depending on system requirements, a suitable M-sequence generator polynomial is selected, and an M-sequence S = [s0, s1, s2, ..., s...] is generated. N―1 The length of the M sequence is N = 2. n -1, where n is the register series. For example, if the generator polynomial is chosen as x... 3 If x + 1, then n = 3, and the length of the generated M sequence is N = 7. The M sequence is generated through a linear feedback shift register (LFSR).

[0132] In some implementations, the base sequence is an M-sequence, and candidate sequences are obtained by cyclically shifting the M-sequence. For example, by performing different cyclic shift operations on the M-sequence, multiple sequences with low complexity and good autocorrelation and cross-correlation properties can be generated. This method can meet the needs of multi-user environments or different symbols while maintaining simple hardware implementation. Another example is the initial M-sequence S = [s0, s1, s2, ..., s...]. N―1 Perform a cyclic shift, and the resulting sequence S(k) is expressed as: S(k) = [s k ,s k+1 ,…,s N―1 ,s0,s1,…,s k―1By selecting different values ​​of k as the step size for the cyclic shift, such as k = N / 4 or k = N / 2, a set of candidate sequences with similar autocorrelation characteristics but lower cross-correlation can be generated. In applications involving the first and / or second signals, maintaining a near balance between the number of "0"s and "1"s in the sequence improves power equalization and detection performance. Therefore, the shifted sequence also maintains this balance. The sequence generated through the cyclic shift operation keeps the number of "0"s and "1"s in a balanced state. This characteristic ensures that the envelopes of the first and / or second signals based on OOK modulation are also centered around the average value, which is beneficial for low-complexity envelope detection.

[0133] In order to obtain a lower cross-correlation peak, in some implementations, the step size of the cyclic shift of the M sequence is determined based on the length of the M sequence.

[0134] In some implementations, the step size of the cyclic shift of the M sequence satisfies Among them, C V Let N be the step size of the cyclic shift of sequence M. M Let M be the length of the M sequence.

[0135] In some implementations, the step size of the cyclic shift of the M sequence can be an equally spaced step size to ensure a uniform distribution of the sequence.

[0136] In some implementations, the step size of the cyclic shift of the M sequence can be a prime number. A prime step size can reduce the repetition patterns between sequences, which helps to reduce the peak value of cross-correlation.

[0137] To fully utilize the power of network devices, the power level in each OFDM symbol transmitting the first and / or second signals should be strictly kept the same. For the design of the first and / or second sequences, to obtain multiple candidate sequences, in some implementations, the M-sequences can be generated based on the cyclic shift step sizes of multiple M-sequences and / or multiple generator polynomials. In practical implementations, using multiple different cyclic shift step sizes can be preferred over different generator polynomials to obtain better correlation and limit the implementation to a single LFSR.

[0138] In some implementations, the base sequence is the M-sequence, and the candidate sequences are obtained by expanding or truncating the M-sequence. For example, the M-sequence is expanded or truncated through cyclic expansion, two's complement, extraction, or other expansion operations to generate candidate sequences.

[0139] In some implementations, the base sequence is an M-sequence, and the candidate sequences are generated by applying cyclic shifts to the M-sequence before or after expansion / truncation to produce different sequences with different correlation properties.

[0140] To achieve timing synchronization with envelope detection, the first signal should have an envelope with good autocorrelation characteristics so that LR can obtain the peak position through correlation operations to find the timing. In some implementations, the first signal is LP-SS, the modulation scheme of LP-SS is OOK, and the first sequence corresponding to LP-SS is generated based on the M sequence. That is to say, LP-SS can be modulated at the input using the OOK modulation scheme with good autocorrelation characteristics, and the first sequence generated based on the M sequence can be mapped onto the OOK ON symbol.

[0141] In some implementations, the length of the first sequence and / or the second sequence is associated with one or more of the following: the number of transmission resource blocks of the first signal and / or the second signal; the modulation order of the first signal and / or the second signal; the length of the base sequence; the subcarrier spacing; channel state information; the mobility of the terminal device; the power consumption of the terminal device; and the detection requirements of the terminal device.

[0142] In some implementations, the lengths of the first sequence and / or the second sequence are associated with the modulation order of the first signal and / or the second signal. For example, the modulation scheme of the first signal can support OOK-1, OOK-4, ..., OOK-M. The modulation order of OOK-M is considered to be M = 1, 2, 4, or M = 1, 2, 4, 16, or other values. If the first signal supports multiple OOK modulations with different M values, the network device can be configured with a first sequence for the serving cell and multiple first sequences for non-serving cells. Different first sequences may have different OOK modulations with different M values. Therefore, for each M value, one or more first sequence lengths can be supported.

[0143] In some implementations, the lengths of the first sequence and / or the second sequence are associated with the modulation order of the first signal and / or the second signal. This can be understood as the range of values ​​for the lengths of the first sequence and / or the second sequence being determined based on the modulation order of the first signal.

[0144] In some implementations, the length of the first sequence is associated with the modulation order of the first signal, and there is a second association between the length of the first sequence and the modulation order of the first signal. The second association is used to indicate one or more of the following: the modulation order of one first signal corresponds to the length of multiple first sequences; the modulation orders of multiple first signals correspond to the length of one first sequence; the modulation order of one first signal corresponds to the length of one first sequence.

[0145] In some implementations, the modulation order of a first signal corresponds to the lengths of multiple first sequences. For example, if the modulation order of the first signal is M, then the range of the length of the first sequence is L = {4*M, 6*M, 8*M, 12*M}. Specifically, if the value of M is 1, then the range of the length of the first sequence is L = {4, 6, 8}; if the value of M is 2, then the range of the length of the first sequence is L = {8, 12, 16, 24}; if the value of M is 4, then the range of the length of the first sequence is L = {16, 24, 32, 56}.

[0146] In some implementations, the modulation order of a first signal corresponds to the length of a first sequence, or in other words, the length of the first sequence corresponds one-to-one with the modulation order of the first signal. For example, the modulation order of the first signal is M, and the length of the first sequence is L. When determining L corresponding to different values ​​of M, the number of OFDM symbols used to transmit the first signal can remain constant for different M values, regardless of the M value. This is also to avoid the terminal device blindly detecting first signals with different numbers of OFDM symbols in idle / inactive modes. Therefore, the L value corresponding to M values ​​of 1, 2, or 4 can be scaled along with the M value so that the number of OFDM symbols is the same for different M values. For example, if M is 1, the length of the selected first sequence is L1 = 8; correspondingly, when M is 2, the length of the selected first sequence is L2, and when M is 4, the length of the selected first sequence is L3, such as L2 = 16 and L3 = 32.

[0147] In some implementations, the modulation order of multiple first signals corresponds to the length of a first sequence. For example, the modulation order of the first signal is M, and the length of the first sequence is L. For different values ​​of M, L can remain constant.

[0148] In some implementations, the length of the first sequence and / or the second sequence is associated with the modulation order of the first signal and / or the second signal and the number of transmission resource blocks of the first signal and / or the second signal. That is, the length of the first sequence and / or the second sequence is determined based on the modulation order of the first signal and / or the second signal and the number of transmission resource blocks of the first signal and / or the second signal.

[0149] In some implementations, the base sequence is a ZC sequence, and the lengths of the first and / or second sequences satisfy at least one of the following: L ZC =2 k / M,2 k ≤12*X; L ZC= (2*X) / M; where M is the modulation order of the first signal and / or the second signal, and X is the number of transmission resource blocks (RBs) of the first signal and / or the second signal. For example, the modulation order of the second signal is M, the number of transmission resource blocks (RBs) of the second signal is X, the base sequence is generated based on the ZC sequence, and the length of the second sequence is determined by formula L. ZC =2 k / M is determined, where 2 k ≤12*X, where M can take the values ​​1, 2, 4, or other even numbers. For example, the length of the second sequence is determined by the formula L. ZC = (12*X) / M.

[0150] In some implementations, the lengths of the first and / or second sequences are related to the modulation order of the first and / or second signals and the length of the fundamental sequence. For example, the modulation order of the second signal is M, the fundamental sequence is a ZC sequence, and the length of the ZC sequence is N. ZC If M takes the value 1, N ZC Given prime numbers, the length of the second sequence satisfies N. ZC <L ZC If M takes the value of 2 or 4, N ZC Given prime numbers, the length of the second sequence satisfies N. ZC <L ZC —2*G0, where G0 is a system-defined value.

[0151] In some implementations, the lengths of the first sequence and / or the second sequence are associated with the subcarrier spacing. For example, if the length of the first sequence is L, in a multi-carrier system, different SCSs will affect the signal bandwidth and time resolution of each subcarrier, so the configuration of the value of L needs to be adapted to different SCSs to optimize detection performance.

[0152] In some implementations, the lengths of the first sequence and / or the second sequence are associated with the subcarrier spacing. This can be understood as the lengths of the first sequence and / or the second sequence being determined based on a configuration strategy. The configuration strategy indicates one or more of the following: an SCS value of 15kHz is suitable for low-bandwidth, long-symbol-time first and / or second signals, and is suitable for longer L values ​​(such as L=24 or L=32, or 8*M, 12*M) to smooth signal detection; an SCS value of 30kHz is suitable for medium-bandwidth applications, where a medium-length L value (such as L=8 or L=16, 4*M, 6*M) can be used to balance bandwidth and detection accuracy; an SCS value of 60kHz is suitable for high-speed transmission, short-symbol-time first and / or second signals, and is suitable for shorter L values ​​(such as L=4 or L=6) to ensure fast detection and low latency; where M is the modulation order of the first and / or second signals.

[0153] In some implementations, the lengths of the first sequence and / or the second sequence are associated with channel state information and subcarrier spacing. For example, a network device can monitor channel conditions and dynamically adjust the lengths of the first sequence and / or the second sequence to ensure optimal detection performance of the first signal and / or the second signal at terminal devices under different SCSs.

[0154] In some implementations, the lengths of the first sequence and / or the second sequence are associated with channel state information. For example, if the first signal is LP-SS, a longer length of the first sequence is selected in the case of inaccurate channel estimation to enhance the autocorrelation performance of LP-SS, thereby improving synchronization accuracy. As another example, the channel state information includes signal-to-noise ratio and interference intensity. Two thresholds are defined, namely the signal-to-noise ratio threshold SNRthreshold and the interference intensity threshold threshold. If SNR ≥ SNRthreshold and I ≤ threshold, the channel state is considered "low noise / low interference"; if SNR < SNRthreshold or I > threshold, the channel state is considered "high noise / high interference". Based on the above judgment of the channel state, a shorter length of the first sequence is selected in a low-noise environment, or a longer length of the first sequence is selected in a high-interference environment.

[0155] In some implementations, the lengths of the first sequence and / or the second sequence are associated with channel state information and the detection requirements of terminal devices. For example, a network device can dynamically select the optimal lengths of the first sequence and / or the second sequence according to real-time channel conditions and the detection requirements of terminal devices.

[0156] Since a moving terminal device can cause Doppler frequency shift, shifting the spectrum of the first signal and / or the second signal, resulting in a decrease in the detection accuracy of the terminal device. In some implementations, the lengths of the first sequence and / or the second sequence are associated with the mobility of the terminal device. For example, high mobility (such as a terminal device moving at high speed) may cause rapid frequency shift. Therefore, in a high-mobility scenario, selecting a longer length of the first sequence and / or the second sequence helps to reduce the impact of the Doppler effect on detection.

[0157] In some implementations, the lengths of the first sequence and / or the second sequence are associated with the power consumption of terminal devices. For example, in a power-constrained environment (such as a battery-powered Internet of Things (IoT) device as a terminal device), since a longer sequence will increase computational complexity and power consumption, selecting a shorter length of the first sequence and / or the second sequence helps to extend the battery life of the terminal device.

[0158] In some implementations, the lengths of the first and / or second sequences are associated with channel state information and the mobility of the terminal device; or, in other words, the lengths of the first and / or second sequences are associated with a weighted sum of channel state information and the mobility of the terminal device. For example, signal state information includes signal-to-noise ratio (SNR), interference intensity, and multipath effects. Weights are defined for SNR, interference intensity, multipath effects, and the mobility of the terminal device, and the lengths of the first and / or second sequences are determined using a weighted sum of these four factors.

[0159] In some implementations, the weights of channel state information and terminal device mobility can be determined based on application requirements.

[0160] In some implementations, application requirements can be understood as the application scenarios of the communication system. For example, application requirements can be application scenarios in 5G systems (such as enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (uRLLC), and massive machine-type communications (mMTC)), or future 6G application scenarios (such as sensing).

[0161] In some implementations, the modulation order of the SCC can be combined with the length of the first sequence and / or the second sequence to accommodate different detection requirements. For example, if the modulation order of the first signal is M, for different SCC values ​​(such as 15kHz and 30kHz), the same M and different lengths of the first sequence can be supported, or different M and the length of the first sequence can be supported, or different M and the same length of the first sequence can be supported.

[0162] Channel coding can utilize redundant information to combat the fading channel of LP-WUR, improving the detection and decoding performance of the first and / or second signals. Typically, channel coding schemes require highly complex decoding algorithms (i.e., Polar codes, low-density parity-check codes, LDPC codes) and high power consumption to improve signal detection and decoding performance.

[0163] In some implementations, the first and / or second signals can be encoded using Manchester coding. Manchester coding is a simple solution that provides a balanced sequence with an equal number of 0s and 1s and a finite length of consecutive zeros. Manchester coding systematically enforces power balance in each OFDM symbol and in each ON symbol of any modulation order, ensuring full utilization of network device power and aiding automatic gain control (AGC) tracking. In cases of correlation mismatch, the autocorrelation function of the Manchester-coded sequence is correlated with the autocorrelation function of the pre-coded bipolar sequence; therefore, Manchester coding will systematically tend to create sequences with narrower autocorrelation main lobes, which is relevant to the first signal simulation assumption for a small detection window under consideration.

[0164] To facilitate understanding, the following example illustrates a scheme for encoding the first signal using Manchester coding.

[0165] Assuming the first signal is LP-SS, the LP-SS after OOK modulation is a binary sequence of length L = 4. The first sequence is determined based on a candidate sequence of length L. m The M-sequence M[n] is obtained after operations such as expansion, truncation, cyclic shift, and extraction. The candidate sequence before Manchester encoding can be written as n = 0, ..., L'-1. Here, a set of elements is defined, (f, c b ,c a ,d), f∈{0,1} either return the sequence or its binary complementary version, c a ∈{0,…,L m ―1} is the shift step size before expansion / truncation, c b ∈{0,…,L'―1} is the shift step size after expansion / truncation, and d is the decimation, where gcd(d,L')=1. If the first sequence is Manchester coded, then L'=L / 2; otherwise, L'=L. This involves selecting sequences with similar autocorrelation properties from all possible generated sequences to provide uniform timing performance across cells. Since timing estimation is performed within a small search window, the terminal device can search for sequences with low correlation around the main peak to reduce the main lobe width, then minimize the peak sidelobes in the remainder of the autocorrelation profile, and further minimize the maximum cross-correlation.

[0166] In some implementations, when the first receiver of the terminal device receives the second signal, if the subgroup indicated by a portion of the received second signal does not match the subgroup of the terminal device, the terminal device stops receiving subsequent second signals. For example, the second signal is LP-WUS, and the modulation scheme of the second signal is OOK (see Figure 4). If an LP-WUS can consist of multiple OFDM symbols, regardless of the length of the bit stream, it can be processed and transmitted symbol by symbol. On the first receiver side, the LP-WUS demodulates the OOK signal or processes the same set of sequences used to generate the pre-DFT sequence in each OFDM symbol. The LP-WUS does not need to buffer all the resources of the LP-WUS. Since the subgroup identity identifier (ID) indicated by the LP-WUS is known in advance by the terminal device, if the terminal device finds that the subgroup indicated by the bits of the LP-WUS received in the first few LP-WUS moments does not match its own subgroup identifier, the terminal device can stop receiving subsequent LP-WUS moments to save power.

[0167] In order to ensure that the total power levels of the first signal and / or the second signal are consistent when superimposing OFDM, in some implementations, the power of the first signal and / or the second signal is allocated based on one or more of the following: the active subcarrier; the symbol position of the OFDM; and the peak to average power ratio (PAPR) detection result.

[0168] In some implementations, the power of the first and / or second signals is evenly distributed across the active subcarriers. For example, if the modulation scheme of the first signal is OOK, to ensure that the total power of the first signal is evenly distributed across all active subcarriers, the sum of the power of the ON symbol of OOK is equal across all subcarriers, avoiding concentration on a single or a few subcarriers, thereby reducing peak power and maintaining consistent detection performance. Assume the total power is P. total And there are N on If several subcarriers are activated, then the power of each activated subcarrier is: P sub =P total / N on Equal power P is allocated to each active subcarrier. sub This method ensures that the sum of power on all active subcarriers remains stable at P throughout the entire OFDM frame. total Within.

[0169] In some implementations, the power of the first and / or second signals is determined based on the symbol positions in OFDM. For example, if the first signal is modulated as OOK, in multi-symbol OFDM, the power is dynamically adjusted according to the symbol position to ensure smooth power changes between ON and OFF symbols in OOK, preventing detection errors caused by instantaneous power variations. Specifically, the total power of the first signal can be distributed across various OFDM symbol frames, and the power can be adjusted in different frames according to frequency deviations to make it more uniform.

[0170] In some implementations, the power of the symbol frame transmitting the first and / or second signals is determined by the formula p = α * p′ + (1 - α) * p. total / N on Determined; where α is the smoothing factor, p′ is the power of the previous symbol frame, p total N represents the total power of the first signal and / or the second signal. on The number of active subcarriers.

[0171] In some implementations, the value of the smoothing factor α can be adjusted according to requirements, and it is generally recommended to be between 0.8 and 0.9 to avoid drastic power changes.

[0172] In some implementations, the power of the first and / or second signals is allocated based on PAPR detection results. For example, PAPR detection is performed for each symbol frame, and peak clipping is performed if the power peaks of some subcarriers exceed a set threshold.

[0173] In some implementations, peak clipping can be achieved by limiting the power limit of a single subcarrier, or by redistributing the power of high-power subcarriers to other low-power subcarriers.

[0174] In some implementations, the power distribution after peak clipping should be uniformly distributed within the symbol frame to avoid abnormally prominent power of certain subcarriers in the frequency domain.

[0175] In some implementations, the power after peak clipping is distributed according to the subcarrier sequence number, with power decreasing or increasing towards both sides, such as gradually reducing power towards the edge based on the center subcarrier.

[0176] In some implementations, the structure of the OFDM symbols transmitting the first and / or second signals is configured by the network device. The OFDM symbols include one or more intervals. For example, referring to Figure 5, which illustrates the structure of an OFDM symbol transmitting a second signal, obtained by superimposing a second sequence onto the time or frequency domain of OFDM, taking OOK-4 modulation as an example, gaps are inserted at the beginning and end of each OOK symbol in OOK-4 (example a), i.e., a gap of length G0 is added at the beginning and end of each OOK character. The value of G0 is determined by the maximum value of the time error before the second signal is detected. G0 can suppress the degradation in second signal detection performance caused by a large residual time error. The maximum value of the time error before the second signal is detected determines the different positions of G0, as shown in examples a, b, c, and d. Different time errors can lead to different symbol structures.

[0177] In some implementations, the network device can be configured with one or more OFDM symbol structures. For example, the network device may be configured with a fixed OFDM symbol structure, as shown in Example a in Figure 5. Alternatively, the network device may be configured with multiple OFDM symbol structures, selecting the OFDM symbol structure based on the time error before the second signal detection.

[0178] In some implementations, the first signal carries the cell's identity information.

[0179] In some implementations, cell identity information can be a cell ID. For example, the first signal is LP-SS, which carries the cell ID. In LP-SS transmission based on predefined rules, the terminal device can select any cell. For example, during cell (re)selection, the terminal device can potentially determine the cell setting based on the cell ID carried by the LP-SS received from any neighboring non-serving cell.

[0180] In some implementations, the first signal carries cell identification information. This can be understood as the information module following the preamble of the first signal carrying the cell ID to trigger sequence detection. For example, as shown in Figure 6, the information module of the first signal carries the cell ID.

[0181] In some implementations, the first signal carries cell identification information, which can be understood as the information module following the preamble of the first signal carrying a truncated cell ID. For example, referring to Figure 6, the information module of the first signal is used to carry the truncated cell ID information through four binary sequences, connecting the fixed, known preamble with the truncated cell ID information module.

[0182] In some implementations, before the terminal device receives the first signal and / or the second signal, the terminal device may receive first information sent by the network device. This first information indicates an update to the first sequence and / or the second sequence. Accordingly, before the network device sends the first signal and / or the second signal, the network device sends the first information to the terminal device. For example, the first signal is LP-SS. When configuring the first sequence corresponding to LP-SS, the network device can dynamically change the first sequence. The network device can indicate the update of the first sequence to the terminal device via the first information before sending the LP-SS.

[0183] In some implementations, the first information can be carried in downlink control information (DCI) and / or RRC messages.

[0184] The method embodiments of this application have been described in detail above with reference to Figures 1 to 6. The apparatus embodiments of this application will be described in detail below with reference to Figures 7 to 9. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0185] Figure 7 is a schematic diagram of a terminal device according to an embodiment of this application. The terminal device 700 shown in Figure 7 includes a receiving unit 710.

[0186] The receiving unit 710 is configured to receive one or more of the following from a network device: a first signal and a second signal, wherein the second signal is received based on the first signal; the second signal; wherein the first signal and / or the second signal is obtained by superimposing a first sequence and / or a second sequence on the time or frequency domain of orthogonal frequency division multiplexing (OFDM), and the first signal and / or the second signal is received by a first receiver of the terminal device, wherein the power consumption of the first receiver is lower than the power consumption of the second receiver of the terminal device.

[0187] In some implementations, the first signal is a low-power synchronization signal LP-SS.

[0188] In some implementations, the second signal is a low-power wake-up signal LP-WUS.

[0189] In some implementations, the timing information of the first signal is determined based on the timing information of the third signal; and / or the time domain resources occupied by the first signal overlap with the time domain resources occupied by the third signal; and / or the first signal and the third signal have a quasi-co-located QCL relationship; and / or the third signal includes one or more of the following: a synchronization signal broadcast channel block (SSB); an SSB burst set; a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) in the SSB.

[0190] In some implementations, the information bits of the second signal are carried on superimposed OFDM, and the size of the information bits is associated with one or more of the following: the information content carried by the second signal; the encoding rate of the second signal; the number of paging opportunities (POs) of the second signal; the number of terminal devices indicated by the POs; and the number of times the second signal has been monitored.

[0191] In some implementations, the size of the information bits is also associated with one or more of the following: network configuration information; the number of cells in the tracking area; the density of terminal devices in the cells; and the amount of currently arriving traffic.

[0192] In some implementations, the first sequence and the second sequence have a first association relationship, which indicates one or more of the following: the first sequence is the same as the second sequence; the first sequence is different from the second sequence; the modulation order of the first sequence is the same as the modulation order of the second sequence; the modulation order of the first sequence is different from the modulation order of the second sequence; the modulation order of the first sequence is greater than or equal to the modulation order of the second sequence.

[0193] In some implementations, the first sequence and / or the second sequence is determined based on one or more of the following: a pre-configured sequence; a predefined sequence; or one or more candidate sequences.

[0194] In some implementations, the candidate sequence is obtained from the base sequence through at least one of the following operations: cyclic shift; expansion; truncation.

[0195] In some implementations, the candidate sequence is obtained by inserting zeros before and / or after the expansion of the base sequence, the total number of which is determined by the formula N0 = L - N; where L is the length of the candidate sequence and N is the length of the base sequence.

[0196] In some implementations, the step size of the cyclic shift includes one or more.

[0197] In some implementations, the base sequence is a ZC sequence, and the root sequence of the ZC sequence includes one or more.

[0198] In some implementations, the root sequence of the ZC sequence and / or the step size of the cyclic shift are determined based on one or more of the following: the modulation order of the first signal and / or the second signal; the length of the base sequence; network load information; channel state information; inter-cell interference; and the timing error of the terminal device.

[0199] In some implementations, the step size of the cyclic shift is determined by a formula. Determined; where N ZC M is the length of the ZC sequence, and M is the modulation order of the first signal and / or the second signal.

[0200] In some implementations, the base sequence is an M-sequence, which is generated based on one or more generator polynomials.

[0201] In some implementations, the step size of the cyclic shift of the M sequence satisfies Among them, C V N is the step size of the cyclic shift of the M sequence. M The length of the M sequence is given.

[0202] In some implementations, the length of the first sequence and / or the second sequence is associated with one or more of the following: the number of transmission resource blocks of the first signal and / or the second signal; the modulation order of the first signal and / or the second signal; the length of the base sequence; the subcarrier spacing; channel state information; the mobility of the terminal device; the power consumption of the terminal device; and the detection requirements of the terminal device.

[0203] In some implementations, the base sequence is a ZC sequence, and the lengths of the first sequence and / or the second sequence satisfy at least one of the following: L ZC =2 k / M,2 k ≤12*X; L ZC = (2*X) / M; where M is the modulation order of the first signal and / or the second signal, and X is the number of transmission resource blocks of the first signal and / or the second signal.

[0204] In some implementations, there is a second correlation between the length of the first sequence and the modulation order of the first signal, the second correlation indicating one or more of the following: a modulation order of one first signal corresponds to the length of multiple first sequences; multiple modulation orders of the first signals correspond to the length of one first sequence; a modulation order of one first signal corresponds to the length of one first sequence.

[0205] In some implementations, the power of the first signal and / or the second signal is based on one or more of the following: the active subcarrier; the symbol position of the OFDM; and the peak-to-average power ratio (PAPR) detection result.

[0206] In some implementations, the power of the first signal and / or the second signal is uniformly distributed across the activated subcarrier.

[0207] In some implementations, the power of the symbol frame transmitting the first signal and / or the second signal is determined by the formula p = α * p′ + (1 - α) * p total / N on Determined; where α is the smoothing factor, p′ is the power of the previous symbol frame, p total N represents the total power of the first signal and / or the second signal. on The number of activated subcarriers.

[0208] In some implementations, the modulation method of the first signal and / or the second signal is binary amplitude shift keying (OOK).

[0209] In some implementations, the first signal and / or the second signal are encoded using Manchester encoding.

[0210] In some implementations, the structure of the OFDM symbols for transmitting the second signal and / or the second signal is configured by the network device, and the OFDM symbols include one or more intervals.

[0211] In some implementations, the first signal carries cell identity information.

[0212] In some implementations, before the receiving unit receives the first signal and / or the second signal, the terminal device further includes: the receiving unit 710 is also configured to receive first information sent by the network device, the first information being used to indicate an update of the first sequence and / or the second sequence.

[0213] Figure 8 is a schematic diagram of a network device according to an embodiment of this application. The network device 800 shown in Figure 8 includes: a transmitting unit 810.

[0214] The transmitting unit 810 is configured to transmit one or more of the following to the terminal device: a first signal and a second signal, wherein the second signal is received based on the first signal; the second signal; wherein the first signal and / or the second signal is obtained by superimposing a first sequence and / or a second sequence on the time domain or frequency domain of orthogonal frequency division multiplexing (OFDM), and the first signal and / or the second signal is received by a first receiver of the terminal device, wherein the power consumption of the first receiver is lower than the power consumption of the second receiver of the terminal device.

[0215] In some implementations, the first signal is a low-power synchronization signal LP-SS.

[0216] In some implementations, the second signal is a low-power wake-up signal LP-WUS.

[0217] In some implementations, the timing information of the first signal is determined based on the timing information of the third signal; and / or the time domain resources occupied by the first signal overlap with the time domain resources occupied by the third signal; and / or the first signal and the third signal have a quasi-co-located QCL relationship; and / or the third signal includes one or more of the following: a synchronization signal broadcast channel block (SSB); an SSB burst set; a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) in the SSB.

[0218] In some implementations, the information bits of the second signal are carried on superimposed OFDM, and the size of the information bits is associated with one or more of the following: the information content carried by the second signal; the encoding rate of the second signal; the number of paging opportunities (POs) of the second signal; the number of terminal devices indicated by the POs; and the number of times the second signal has been monitored.

[0219] In some implementations, the size of the information bits is also associated with one or more of the following: network configuration information; the number of cells in the tracking area; the density of terminal devices in the cells; and the amount of currently arriving traffic.

[0220] In some implementations, the first sequence and the second sequence have a first association relationship, which indicates one or more of the following: the first sequence is the same as the second sequence; the first sequence is different from the second sequence; the modulation order of the first sequence is the same as the modulation order of the second sequence; the modulation order of the first sequence is different from the modulation order of the second sequence; the modulation order of the first sequence is greater than or equal to the modulation order of the second sequence.

[0221] In some implementations, the first sequence and / or the second sequence is determined based on one or more of the following: a pre-configured sequence; a predefined sequence; or one or more candidate sequences.

[0222] In some implementations, the candidate sequence is obtained from the base sequence through at least one of the following operations: cyclic shift; expansion; truncation.

[0223] In some implementations, the candidate sequence is obtained by inserting zeros before and / or after the expansion of the base sequence, the total number of which is determined by the formula N0 = L - N; where L is the length of the candidate sequence and N is the length of the base sequence.

[0224] In some implementations, the step size of the cyclic shift includes one or more.

[0225] In some implementations, the base sequence is a ZC sequence, and the root sequence of the ZC sequence includes one or more.

[0226] In some implementations, the root sequence of the ZC sequence and / or the step size of the cyclic shift are determined based on one or more of the following: the modulation order of the first signal and / or the second signal; the length of the base sequence; network load information; channel state information; inter-cell interference; and the timing error of the terminal device.

[0227] In some implementations, the step size of the cyclic shift is determined by a formula. Determined; where N ZC M is the length of the ZC sequence, and M is the modulation order of the first signal and / or the second signal.

[0228] In some implementations, the base sequence is an M-sequence, which is generated based on one or more generator polynomials.

[0229] In some implementations, the step size of the cyclic shift of the M sequence satisfies Among them, C V N is the step size of the cyclic shift of the M sequence. M The length of the M sequence is given.

[0230] In some implementations, the length of the first sequence and / or the second sequence is associated with one or more of the following: the number of transmission resource blocks of the first signal and / or the second signal; the modulation order of the first signal and / or the second signal; the length of the base sequence; the subcarrier spacing; channel state information; the mobility of the terminal device; the power consumption of the terminal device; and the detection requirements of the terminal device.

[0231] In some implementations, the base sequence is a ZC sequence, and the lengths of the first sequence and / or the second sequence satisfy at least one of the following: L ZC =2 k / M,2 k ≤12*X; L ZC = (2*X) / M; where M is the modulation order of the first signal and / or the second signal, and X is the number of transmission resource blocks of the first signal and / or the second signal.

[0232] In some implementations, there is a second correlation between the length of the first sequence and the modulation order of the first signal, the second correlation indicating one or more of the following: a modulation order of one first signal corresponds to the length of multiple first sequences; multiple modulation orders of the first signals correspond to the length of one first sequence; a modulation order of one first signal corresponds to the length of one first sequence.

[0233] In some implementations, the power of the first signal and / or the second signal is based on one or more of the following: the active subcarrier; the symbol position of the OFDM; and the peak-to-average power ratio (PAPR) detection result.

[0234] In some implementations, the power of the first signal and / or the second signal is uniformly distributed across the activated subcarrier.

[0235] In some implementations, the power of the symbol frame transmitting the first signal and / or the second signal is determined by the formula p = α * p′ + (1 - α) * p total / N on Determined; where α is the smoothing factor, p′ is the power of the previous symbol frame, p total N represents the total power of the first signal and / or the second signal. on The number of activated subcarriers.

[0236] In some implementations, the modulation method of the first signal and / or the second signal is binary amplitude shift keying (OOK).

[0237] In some implementations, the first signal and / or the second signal are encoded using Manchester encoding.

[0238] In some implementations, the structure of the OFDM symbols for transmitting the second signal and / or the second signal is configured by the network device, and the OFDM symbols include one or more intervals.

[0239] In some implementations, the first signal carries cell identity information.

[0240] In some implementations, before the sending unit sends the first signal and / or the second signal, the network device further includes: the sending unit 810 is further configured to send first information to the terminal device, the first information being used to indicate an update of the first sequence and / or the second sequence.

[0241] In an optional embodiment, the receiving unit 710 may be a transceiver 930. The terminal device 700 may also include a processor 910 and a memory 920, as shown in FIG9.

[0242] In an optional embodiment, the transmitting unit 810 may be a transceiver 930. The network device 800 may also include a processor 910 and a memory 920, as shown in FIG9.

[0243] Figure 9 is a schematic structural diagram of a communication device according to an embodiment of this application. The dashed lines in Figure 9 indicate that the unit or module is optional. This device 900 can be used to implement the methods described in the above method embodiments. The device 900 can be a chip, a terminal device, or a network device.

[0244] The apparatus 900 may include one or more processors 910. The processor 910 may support the apparatus 900 in implementing the methods described in the preceding method embodiments. The processor 910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0245] The apparatus 900 may further include one or more memories 920. The memories 920 store a program that can be executed by the processor 910, causing the processor 910 to perform the methods described in the preceding method embodiments. The memories 920 may be independent of the processor 910 or integrated within the processor 910.

[0246] The device 900 may also include a transceiver 930. The processor 910 can communicate with other devices or chips via the transceiver 930. For example, the processor 910 can send and receive data with other devices or chips via the transceiver 930.

[0247] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal or network device provided in this application, and the program causes a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0248] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0249] This application also provides a computer program. This computer program can be applied to the terminal or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0250] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0251] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0252] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0253] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0254] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0255] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0256] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0257] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0258] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0259] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs) or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0260] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of wireless communication, comprising: include: The terminal device receives one or more of the following from the network device: A first signal and a second signal, wherein the second signal is received based on the first signal; The second signal; Wherein, the first signal and / or the second signal are obtained by superimposing the first sequence and / or the second sequence on the time domain or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal are received by the first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of the second receiver of the terminal device.

2. The method of claim 1, wherein, The first signal is a low-power synchronization signal LP-SS.

3. The method of claim 1 or 2, wherein, The second signal is the low-power wake-up signal LP-WUS.

4. The method of any one of claims 1-3, wherein, The timing information of the first signal is determined based on the timing information of the third signal; and / or The time-domain resources occupied by the first signal overlap with those occupied by the third signal; and / or The first signal and the third signal have a quasi-co-addressable (QCL) relationship; and / or The third signal includes one or more of the following: a synchronization signal broadcast channel block (SSB); an SSB burst set; or a primary synchronization signal (PSS) or secondary synchronization signal (SSS) in the SSB.

5. The method of any one of claims 1-4, wherein, The information bits of the second signal are carried in superimposed OFDM, and the size of the information bits is associated with one or more of the following: The information content carried by the second signal; The encoding rate of the second signal; The number of paging opportunities (POs) in the second signal; The number of terminal devices indicated by the PO; The number of times the second signal was monitored.

6. The method of claim 5, wherein, The size of the information bits is also related to one or more of the following: Network configuration information; The number of cells in the tracking area; The density of terminal devices within the community; The current volume of incoming traffic.

7. The method of any one of claims 1-6, wherein, The first sequence and the second sequence have a first association relationship, which indicates one or more of the following: The first sequence is the same as the second sequence; The first sequence is different from the second sequence; The modulation order of the first sequence is the same as that of the second sequence; The modulation order of the first sequence is different from that of the second sequence; The modulation order of the first sequence is greater than or equal to the modulation order of the second sequence.

8. The method of any one of claims 1-7, wherein, The first sequence and / or the second sequence are determined based on one or more of the following: Pre-configured sequences; Predefined sequences; One or more candidate sequences.

9. The method of claim 8, wherein, The candidate sequence is obtained from the base sequence through at least one of the following operations: cyclic shift; expansion; truncation.

10. The method of claim 9, wherein, The candidate sequence is obtained by inserting zeros before and / or after the expansion of the base sequence, and the total number of zeros is determined by the formula N0 = L - N; Where L is the length of the candidate sequence and N is the length of the base sequence.

11. The method of claim 9 or 10, wherein, The step size of the cyclic shift may include one or more.

12. The method of any one of claims 9-11, wherein, The base sequence is a ZC sequence, and the root sequence of the ZC sequence includes one or more.

13. The method of claim 12, wherein, The root sequence and / or step size of the cyclic shift of the ZC sequence are determined based on one or more of the following: The modulation order of the first signal and / or the second signal; The length of the basic sequence; Network load information; Channel state information; Inter-cell interference; The timing error of the terminal device.

14. The method as described in claim 13, characterized in that, The step size of the cyclic shift is determined by the formula determined; where N ZC is the length of the ZC sequence and M is the modulation order of the first signal and / or the second signal.

15. The method of any one of claims 9-11, wherein, The base sequence is an M-sequence, which is generated based on one or more generator polynomials.

16. The method as described in claim 15, characterized in that, The step size of the cyclic shift of the M-sequence satisfies where C V is the step size of the cyclic shift of the M-sequence, N M is the length of the M-sequence.

17. The method of any one of claims 1-16, wherein, The lengths of the first sequence and / or the second sequence are associated with one or more of the following: The number of transmission resource blocks for the first signal and / or the second signal; The modulation order of the first signal and / or the second signal; The length of the basic sequence; Subcarrier spacing; Channel state information; The mobility of the terminal device; The power consumption of the terminal device; The detection requirements of the terminal equipment.

18. The method of claim 17, wherein, The base sequence is a ZC sequence, and the lengths of the first sequence and / or the second sequence satisfy at least one of the following: L ZC =2 k / M,2 k ≤12*X; L ZC = (2*X) / M; Where M is the modulation order of the first signal and / or the second signal, and X is the number of transmission resource blocks of the first signal and / or the second signal.

19. The method of claim 17, wherein, There is a second correlation between the length of the first sequence and the modulation order of the first signal, the second correlation indicating one or more of the following: The modulation order of one of the first signals corresponds to the length of multiple first sequences; The modulation order of multiple first signals corresponds to the length of one first sequence; The modulation order of the first signal corresponds to the length of the first sequence.

20. The method of any one of claims 1-19, wherein, The power of the first signal and / or the second signal is based on one or more of the following allocations: Active subcarriers; The symbol position of the OFDM; Peak-to-average power ratio (PAPR) test results.

21. The method of claim 20, wherein, The power of the first signal and / or the second signal is uniformly distributed on the activated subcarrier.

22. The method of claim 20, wherein, The power of the symbol frame transmitting the first signal and / or the second signal is determined by the formula p = a * p' + (1 - a) * p total / N on determined; Where α is the smoothing factor, p′ is the power of the previous symbol frame, and p total N represents the total power of the first signal and / or the second signal. on The number of activated subcarriers.

23. The method of any one of claims 1-22, wherein, The modulation method of the first signal and / or the second signal is binary amplitude shift keying (OOK).

24. The method of any one of claims 1-23, wherein, The encoding method of the first signal and / or the second signal is Manchester encoding.

25. The method of any one of claims 1-24, wherein, The structure of the OFDM symbol for transmitting the second signal and / or the second signal is configured by the network device, and the OFDM symbol includes one or more intervals.

26. The method of any one of claims 1-25, wherein, The first signal carries the cell's identity information.

27. The method of any one of claims 1-26, wherein, Before the terminal device receives the first signal and / or the second signal, the method further includes: The terminal device receives first information sent by the network device, the first information being used to indicate an update of the first sequence and / or the second sequence.

28. A method of wireless communication, comprising: include: The network device sends one or more of the following to the terminal device: A first signal and a second signal, wherein the second signal is received based on the first signal; The second signal; Wherein, the first signal and / or the second signal are obtained by superimposing the first sequence and / or the second sequence on the time domain or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal are received by the first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of the second receiver of the terminal device.

29. The method of claim 28, wherein, The first signal is a low-power synchronization signal LP-SS.

30. The method of claim 28 or 29, wherein, The second signal is the low-power wake-up signal LP-WUS.

31. The method of any one of claims 28-30, wherein, The timing information of the first signal is determined based on the timing information of the third signal; and / or The time-domain resources occupied by the first signal overlap with those occupied by the third signal; and / or The first signal and the third signal have a quasi-co-addressable (QCL) relationship; and / or The third signal includes one or more of the following: a synchronization signal broadcast channel block (SSB); an SSB burst set; or a primary synchronization signal (PSS) or secondary synchronization signal (SSS) in the SSB.

32. The method of any one of claims 28-31, wherein, The information bits of the second signal are carried in superimposed OFDM, and the size of the information bits is associated with one or more of the following: The information content carried by the second signal; The encoding rate of the second signal; The number of paging opportunities (POs) in the second signal; The number of terminal devices indicated by the PO; The number of times the second signal was monitored.

33. The method of claim 32, wherein, The size of the information bits is also related to one or more of the following: Network configuration information; The number of cells in the tracking area; The density of terminal devices within the community; The current volume of incoming traffic.

34. The method of any one of claims 28-33, wherein, The first sequence and the second sequence have a first association relationship, which indicates one or more of the following: The first sequence is the same as the second sequence; The first sequence is different from the second sequence; The modulation order of the first sequence is the same as that of the second sequence; The modulation order of the first sequence is different from that of the second sequence; The modulation order of the first sequence is greater than or equal to the modulation order of the second sequence.

35. The method of any one of claims 28-34, wherein, The first sequence and / or the second sequence are determined based on one or more of the following: Pre-configured sequences; Predefined sequences; One or more candidate sequences.

36. The method of claim 35, wherein, The candidate sequence is obtained from the base sequence through at least one of the following operations: cyclic shift; expansion; truncation.

37. The method of claim 36, wherein, The candidate sequence is obtained by inserting zeros before and / or after the expansion of the base sequence, and the total number of zeros is determined by the formula N0 = L - N; Where L is the length of the candidate sequence and N is the length of the base sequence.

38. The method of claim 36 or 37, wherein, The step size of the cyclic shift may include one or more.

39. The method of any one of claims 36-38, wherein, The base sequence is a ZC sequence, and the root sequence of the ZC sequence includes one or more.

40. The method of claim 39, wherein, The root sequence and / or step size of the cyclic shift of the ZC sequence are determined based on one or more of the following: The modulation order of the first signal and / or the second signal; The length of the basic sequence; Network load information; Channel state information; Inter-cell interference; The timing error of the terminal device.

41. The method as described in claim 40, characterized in that, The step size of the cyclic shift is determined by the formula determined; where N ZC is the length of the ZC sequence, and M is the modulation order of the first signal and / or the second signal.

42. The method of any one of claims 36-38, wherein, The base sequence is an M-sequence, which is generated based on one or more generator polynomials.

43. The method as described in claim 42, characterized in that, The step size of the cyclic shift of the M-sequence satisfies where C V is the step size of the cyclic shift of the M-sequence, N M is the length of the M-sequence.

44. The method of any one of claims 28-43, wherein, The lengths of the first sequence and / or the second sequence are associated with one or more of the following: The number of transmission resource blocks for the first signal and / or the second signal; The modulation order of the first signal and / or the second signal; The length of the basic sequence; Subcarrier spacing; Channel state information; The mobility of the terminal device; The power consumption of the terminal device; The detection requirements of the terminal equipment.

45. The method of claim 44, wherein, The base sequence is a ZC sequence, and the lengths of the first sequence and / or the second sequence satisfy at least one of the following: L ZC =2 k / M,2 k ≤12*X; L ZC = (2*X) / M; Where M is the modulation order of the first signal and / or the second signal, and X is the number of transmission resource blocks of the first signal and / or the second signal.

46. The method of claim 44, wherein, There is a second correlation between the length of the first sequence and the modulation order of the first signal, the second correlation indicating one or more of the following: The modulation order of one of the first signals corresponds to the length of multiple first sequences; The modulation order of multiple first signals corresponds to the length of one first sequence; The modulation order of the first signal corresponds to the length of the first sequence.

47. The method of any one of claims 28-46, wherein, The power of the first signal and / or the second signal is based on one or more of the following allocations: Active subcarriers; The symbol position of the OFDM; Peak-to-average power ratio (PAPR) test results.

48. The method of claim 47, wherein, The power of the first signal and / or the second signal is uniformly distributed on the activated subcarrier.

49. The method of claim 47, wherein, The power of the symbol frame transmitting the first signal and / or the second signal is determined by the formula p = a * p' + (1 - a) * p total / N on determined; wherein a is a smoothing factor, p' is the power of the previous symbol frame, p is the power of the current symbol frame, and p is the power of the next symbol frame. total is the total power of the first signal and / or second signal, N on is the number of activated subcarriers.

50. The method of any one of claims 28-49, wherein, The modulation method of the first signal and / or the second signal is binary amplitude shift keying (OOK).

51. The method of any one of claims 28-50, wherein, The encoding method of the first signal and / or the second signal is Manchester encoding.

52. The method of any one of claims 28-51, wherein, The structure of the OFDM symbol for transmitting the second signal and / or the second signal is configured by the network device, and the OFDM symbol includes one or more intervals.

53. The method of any one of claims 28-52, wherein, The first signal carries the cell's identity information.

54. The method of any one of claims 28-53, wherein, Before the network device sends the first signal and / or the second signal, the method further includes: The network device sends first information to the terminal device, the first information being used to indicate an update of the first sequence and / or the second sequence.

55. A terminal device, comprising: The terminal device includes: A receiving unit is used to receive one or more of the following sent by a network device: A first signal and a second signal, wherein the second signal is received based on the first signal; The second signal; Wherein, the first signal and / or the second signal are obtained by superimposing the first sequence and / or the second sequence on the time domain or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal are received by the first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of the second receiver of the terminal device.

56. The terminal device of claim 55, wherein, The first signal is a low-power synchronization signal LP-SS.

57. The terminal device according to claim 55 or 56, characterized by The second signal is the low-power wake-up signal LP-WUS.

58. The terminal device of any one of claims 55-57, wherein, The timing information of the first signal is determined based on the timing information of the third signal; and / or The time-domain resources occupied by the first signal overlap with those occupied by the third signal; and / or The first signal and the third signal have a quasi-co-addressable (QCL) relationship; and / or The third signal includes one or more of the following: a synchronization signal broadcast channel block (SSB); an SSB burst set; or a primary synchronization signal (PSS) or secondary synchronization signal (SSS) in the SSB.

59. The terminal device of any one of claims 55-58, wherein, The information bits of the second signal are carried in superimposed OFDM, and the size of the information bits is associated with one or more of the following: The information content carried by the second signal; The encoding rate of the second signal; The number of paging opportunities (POs) in the second signal; The number of terminal devices indicated by the PO; The number of times the second signal was monitored.

60. The terminal device of claim 59, wherein, The size of the information bits is also related to one or more of the following: Network configuration information; The number of cells in the tracking area; The density of terminal devices within the community; The current volume of incoming traffic.

61. The terminal device of any one of claims 55-60, wherein, The first sequence and the second sequence have a first association relationship, which indicates one or more of the following: The first sequence is the same as the second sequence; The first sequence is different from the second sequence; The modulation order of the first sequence is the same as that of the second sequence; The modulation order of the first sequence is different from that of the second sequence; The modulation order of the first sequence is greater than or equal to the modulation order of the second sequence.

62. The terminal device of any one of claims 55-61, wherein, The first sequence and / or the second sequence are determined based on one or more of the following: Pre-configured sequences; Predefined sequences; One or more candidate sequences.

63. The terminal device of claim 62, wherein, The candidate sequence is obtained from the base sequence through at least one of the following operations: cyclic shift; expansion; truncation.

64. The terminal device of claim 63, wherein, The candidate sequence is obtained by inserting zeros before and / or after the expansion of the base sequence, and the total number of zeros is determined by the formula N0 = L - N; Where L is the length of the candidate sequence and N is the length of the base sequence.

65. The terminal device according to claim 63 or 64, characterized by The step size of the cyclic shift may include one or more.

66. The terminal device of any one of claims 63-65, wherein, The base sequence is a ZC sequence, and the root sequence of the ZC sequence includes one or more.

67. The terminal device of claim 66, wherein, The root sequence and / or step size of the cyclic shift of the ZC sequence are determined based on one or more of the following: The modulation order of the first signal and / or the second signal; The length of the basic sequence; Network load information; Channel state information; Inter-cell interference; The timing error of the terminal device.

68. The terminal device as described in claim 67, characterized in that, The step size of the cyclic shift is determined by the formula determined; where N ZC is the length of the ZC sequence, and M is the modulation order of the first signal and / or the second signal.

69. The terminal device of any one of claims 63-65, wherein, The base sequence is an M-sequence, which is generated based on one or more generator polynomials.

70. The terminal device as described in claim 68, characterized in that, the step size of the cyclic shift of the M-sequence satisfies where C V is a step size of the cyclic shift of the M-sequence, N M is the length of the M-sequence.

71. The terminal device of any one of claims 55-70, wherein, The lengths of the first sequence and / or the second sequence are associated with one or more of the following: The number of transmission resource blocks for the first signal and / or the second signal; The modulation order of the first signal and / or the second signal; The length of the basic sequence; Subcarrier spacing; Channel state information; The mobility of the terminal device; The power consumption of the terminal device; The detection requirements of the terminal equipment.

72. The terminal device of claim 71, wherein, The base sequence is a ZC sequence, and the lengths of the first sequence and / or the second sequence satisfy at least one of the following: L ZC =2 k / M,2 k ≤12*X; L ZC = (2*X) / M; Where M is the modulation order of the first signal and / or the second signal, and X is the number of transmission resource blocks of the first signal and / or the second signal.

73. The terminal device of claim 71, wherein, There is a second correlation between the length of the first sequence and the modulation order of the first signal, the second correlation indicating one or more of the following: The modulation order of one of the first signals corresponds to the length of multiple first sequences; The modulation order of multiple first signals corresponds to the length of one first sequence; The modulation order of the first signal corresponds to the length of the first sequence.

74. The terminal device of any one of claims 55-73, wherein, The power of the first signal and / or the second signal is based on one or more of the following allocations: Active subcarriers; The symbol position of the OFDM; Peak-to-average power ratio (PAPR) test results.

75. The terminal device of claim 74, wherein, The power of the first signal and / or the second signal is uniformly distributed on the activated subcarrier.

76. The terminal device of claim 74, wherein, The power of the symbol frame transmitting the first signal and / or the second signal is determined by the formula p = a * p' + (1 - a) * p total / N on determined; Where α is the smoothing factor, p′ is the power of the previous symbol frame, and p total N represents the total power of the first signal and / or the second signal. on The number of activated subcarriers.

77. The terminal device of any one of claims 55-76, wherein, The modulation method of the first signal and / or the second signal is binary amplitude shift keying (OOK).

78. The terminal device of any one of claims 55-77, wherein, The encoding method of the first signal and / or the second signal is Manchester encoding.

79. The terminal device of any one of claims 55-78, wherein, The structure of the OFDM symbol for transmitting the second signal and / or the second signal is configured by the network device, and the OFDM symbol includes one or more intervals.

80. The terminal device of any one of claims 55-79, wherein, The first signal carries the cell's identity information.

81. The terminal device as described in any one of claims 55-80, characterized in that, Before the receiving unit receives the first signal and / or the second signal, the terminal device further includes: The receiving unit is further configured to receive first information sent by the network device, the first information being used to indicate an update of the first sequence and / or the second sequence.

82. A network device, characterized in that, The network device includes: The sending unit is used to send one or more of the following to the terminal device: A first signal and a second signal, wherein the second signal is received based on the first signal; The second signal; Wherein, the first signal and / or the second signal are obtained by superimposing the first sequence and / or the second sequence on the time domain or frequency domain of orthogonal frequency division multiplexing (OFDM), the first signal and / or the second signal are received by the first receiver of the terminal device, and the power consumption of the first receiver is lower than the power consumption of the second receiver of the terminal device.

83. The network device as described in claim 82, characterized in that, The first signal is a low-power synchronization signal LP-SS.

84. The network device as described in claim 82 or 83, characterized in that, The second signal is the low-power wake-up signal LP-WUS.

85. The network device as described in any one of claims 82-84, characterized in that, The timing information of the first signal is determined based on the timing information of the third signal; and / or The time-domain resources occupied by the first signal overlap with those occupied by the third signal; and / or The first signal and the third signal have a quasi-co-addressable (QCL) relationship; and / or The third signal includes one or more of the following: a synchronization signal broadcast channel block (SSB); an SSB burst set; or a primary synchronization signal (PSS) or secondary synchronization signal (SSS) in the SSB.

86. The network device as described in any one of claims 82-85, characterized in that, The information bits of the second signal are carried in superimposed OFDM, and the size of the information bits is associated with one or more of the following: The information content carried by the second signal; The encoding rate of the second signal; The number of paging opportunities (POs) in the second signal; The number of terminal devices indicated by the PO; The number of times the second signal was monitored.

87. The network device as described in claim 86, characterized in that, The size of the information bits is also related to one or more of the following: Network configuration information; The number of cells in the tracking area; The density of terminal devices within the community; The current volume of incoming traffic.

88. The network device as described in any one of claims 82-87, characterized in that, The first sequence and the second sequence have a first association relationship, which indicates one or more of the following: The first sequence is the same as the second sequence; The first sequence is different from the second sequence; The modulation order of the first sequence is the same as that of the second sequence; The modulation order of the first sequence is different from that of the second sequence; The modulation order of the first sequence is greater than or equal to the modulation order of the second sequence.

89. The network device as described in any one of claims 82-88, characterized in that, The first sequence and / or the second sequence are determined based on one or more of the following: Pre-configured sequences; Predefined sequences; One or more candidate sequences.

90. The network device as described in claim 89, characterized in that, The candidate sequence is obtained from the base sequence through at least one of the following operations: cyclic shift; expansion; truncation.

91. The network device as described in claim 90, characterized in that, The candidate sequence is obtained by inserting zeros before and / or after the expansion of the base sequence, and the total number of zeros is determined by the formula N0 = L - N; Where L is the length of the candidate sequence and N is the length of the base sequence.

92. The network device as described in claim 90 or 91, characterized in that, The step size of the cyclic shift may include one or more.

93. The network device as described in any one of claims 90-92, characterized in that, The base sequence is a ZC sequence, and the root sequence of the ZC sequence includes one or more.

94. The network device as described in claim 93, characterized in that, The root sequence and / or step size of the cyclic shift of the ZC sequence are determined based on one or more of the following: The modulation order of the first signal and / or the second signal; The length of the basic sequence; Network load information; Channel state information; Inter-cell interference; The timing error of the terminal device.

95. The network device as described in claim 94, characterized in that, The step size of the cyclic shift is determined by the formula. Sure; where N ZC is the length of the ZC sequence, and M is the modulation order of the first signal and / or the second signal.

96. The network device as described in any one of claims 90-92, characterized in that, The base sequence is an M-sequence, which is generated based on one or more generator polynomials.

97. The network device as described in claim 96, characterized in that, The step size of the cyclic shift of the M sequence satisfies where C V is a step size of the cyclic shift of the M-sequence, N M is a length of the M-sequence.

98. The network device as described in any one of claims 82-97, characterized in that, The lengths of the first sequence and / or the second sequence are associated with one or more of the following: The number of transmission resource blocks for the first signal and / or the second signal; The modulation order of the first signal and / or the second signal; The length of the basic sequence; Subcarrier spacing; Channel state information; The mobility of the terminal device; The power consumption of the terminal device; The detection requirements of the terminal equipment.

99. The network device as described in claim 98, characterized in that, The base sequence is a ZC sequence, and the lengths of the first sequence and / or the second sequence satisfy at least one of the following: L ZC =2 k / M,2 k ≤12*X; L ZC = (2*X) / M; Where M is the modulation order of the first signal and / or the second signal, and X is the number of transmission resource blocks of the first signal and / or the second signal.

100. The network device as described in claim 98, characterized in that, There is a second correlation between the length of the first sequence and the modulation order of the first signal, the second correlation indicating one or more of the following: The modulation order of one of the first signals corresponds to the length of multiple first sequences; The modulation order of multiple first signals corresponds to the length of one first sequence; The modulation order of the first signal corresponds to the length of the first sequence.

101. The network device as described in any one of claims 82-100, characterized in that, The power of the first signal and / or the second signal is based on one or more of the following allocations: Active subcarriers; The symbol position of the OFDM; Peak-to-average power ratio (PAPR) test results.

102. The network device as described in claim 101, characterized in that, The power of the first signal and / or the second signal is uniformly distributed on the activated subcarrier.

103. The network device as described in claim 101, characterized in that, The power of the symbol frame transmitting the first signal and / or the second signal is determined by the formula p = a * p' + (1 - a) * p total / N on determined; wherein a is a smoothing factor, p' is the power of the previous symbol frame, p is the power of the current symbol frame, and p is the power of the next symbol frame. total is the total power of the first signal and / or the second signal, N is the number of subcarriers, and on is the number of activated subcarriers.

104. The network device as described in any one of claims 82-103, characterized in that, The modulation method of the first signal and / or the second signal is binary amplitude shift keying (OOK).

105. The network device as described in any one of claims 82-104, characterized in that, The encoding method of the first signal and / or the second signal is Manchester encoding.

106. The network device as described in any one of claims 82-105, characterized in that, The structure of the OFDM symbol for transmitting the second signal and / or the second signal is configured by the network device, and the OFDM symbol includes one or more intervals.

107. The network device as described in any one of claims 82-106, characterized in that, The first signal carries the cell's identity information.

108. The network device as described in any one of claims 82-107, characterized in that, Before the transmitting unit transmits the first signal and / or the second signal, the network device further includes: The sending unit is further configured to send first information to the terminal device, the first information being used to indicate an update of the first sequence and / or the second sequence.

109. A terminal device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or send signals so that the terminal performs the method as described in any one of claims 1-27.

110. A network device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals so that the network device performs the method as described in any one of claims 28-54.

111. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the device to perform the method as described in any one of claims 1-54.

112. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1-54.

113. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1-54.

114. A computer program product, characterized in that, Includes a program that causes a computer to perform the method as described in any one of claims 1-54.

115. A computer program, characterized in that, The computer program causes the computer to perform the method as described in any one of claims 1-54.

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