WO2024094183A1

WO2024094183A1 - Wake-up signal processing method and apparatus, and network device

Info

Publication number: WO2024094183A1
Application number: PCT/CN2023/129672
Authority: WO
Inventors: 周化雨; 潘振岗
Original assignee: 展讯通信（上海）有限公司
Priority date: 2022-11-04
Filing date: 2023-11-03
Publication date: 2024-05-10
Also published as: CN118042562A

Abstract

The present application relates to the technical field of communications. Disclosed are a wake-up signal processing method and apparatus, and a network device. The method comprises: processing a first sequence, so as to output a second sequence, wherein the sequence length of the second sequence is greater than the sequence length of the first sequence. Due to the sequence length of a wake-up signal being relatively short, the transmission process of the wake-up signal cannot ensure inter-cell interference randomization when there are many cell identifiers. Therefore, in the present application, the sequence length of a first sequence is increased by means of performing processing, that is, the number of bits of the first sequence is increased, so as to realize processing of a wake-up signal, such that the correlation/relevance between first sequences is reduced to the greatest extent, and inter-cell interference randomization is ensured.

Description

Wake-up signal processing method and device, network equipment

This application claims priority to the prior application No. 202211380605.9 filed on November 4, 2022, with the invention name “Wake-up signal processing method and device, network device”. The contents of the above-mentioned prior application are incorporated into this text by introduction.

Technical Field

The present application relates to the field of communication technology, and in particular to a wake-up signal processing method and device, and a network device.

Background technique

In order to reduce the power consumption of terminal devices, a low power wake-up signal (LP-WUS) mechanism can be introduced.

In some scenarios or moments, the terminal device can only turn on a low power wakeup signal receiver (LP-WUS receiver, LP-WUR or LR) that is independent of the main radio (MR). In this way, the terminal device can turn off the main radio to save energy (reduce power consumption), and can also listen to the low power wakeup signal through the low power wakeup signal receiver to wait for the network to wake up, so as to achieve network accessibility. Through the main radio and the low power wakeup signal receiver, both energy saving and network accessibility can be achieved.

The communication process in the communication system often needs to consider inter-cell interference, and inter-cell interference randomization is very beneficial to the communication system. In order to achieve the purpose of inter-cell interference randomization, it is usually necessary to ensure that the sequence (channel/signal) to be transmitted has a longer sequence length (such as a larger number of bits in the sequence), and the longer the sequence length, the lower the correlation/association between the sequences (channels/signals). In this way, the correlation/association is reduced to ensure the randomization of inter-cell interference as much as possible.

However, since the sequence length of the wake-up signal is relatively short (e.g., the number of bits carried by the wake-up signal sequence is relatively small), the transmission process of the wake-up signal may not be able to ensure the randomization of interference between cells when there are many cell IDs. Therefore, how to optimize the sequence of the wake-up signal to ensure the randomization of interference between cells requires further study.

Summary of the invention

The present application provides a wake-up signal processing method and apparatus, and a network device, in the hope of solving how to optimize the sequence of wake-up signals to ensure randomization of interference between cells.

In a first aspect, a wake-up signal processing method of the present application includes:

The first sequence is processed and a second sequence is output.

It can be seen that the present application increases the sequence length of the first sequence through processing, that is, increases the number of bits of the first sequence, to achieve processing of the wake-up signal so as to reduce the correlation/association between the first sequences as much as possible and ensure the randomization of interference between cells.

The second aspect is a wake-up signal processing method of the present application, including:

modulating the first sequence and outputting an eighth sequence;

The eighth sequence is precoded to output a ninth sequence.

It can be seen that the present application converts the first sequence into "time domain" symbols or modulation symbols through modulation, and then converts the "time domain" symbols or modulation symbols into "frequency domain" symbols through precoding, and maps them to subcarriers for frequency division multiplexing with other OFDM-based signals/channels. At the same time, the sequence length of the first sequence is increased through modulation and/or precoding, that is, the number of bits of the first sequence is increased, so as to realize the processing of the wake-up signal, so as to reduce the correlation/association between the first sequences as much as possible, and ensure the randomization of interference between cells.

The third aspect is a wake-up signal processing method of the present application, including:

The first sequence is processed for the first time, and the eleventh sequence is output.

It can be seen that the present application increases the sequence length of the first sequence through the first processing, that is, increases the number of bits of the first sequence, to realize processing of the wake-up signal so as to reduce the correlation/association between the first sequences as much as possible and ensure the randomization of interference between cells.

A fourth aspect is a wake-up signal processing device of the present application, comprising:

The processing unit is used to process the first sequence and output a second sequence.

A fifth aspect is a wake-up signal processing device of the present application, comprising:

The processing unit is used to modulate the first sequence to output an eighth sequence; and precode the eighth sequence to output a ninth sequence.

A sixth aspect is a wake-up signal processing device of the present application, including:

The processing unit is used to perform a first processing on the first sequence and output an eleventh sequence.

In a seventh aspect, the steps in the method designed in the first aspect, the second aspect or the third aspect are applied to a network device.

The eighth aspect is a network device of the present application, comprising a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps in the method designed in the first aspect above.

The ninth aspect is a chip of the present application, comprising a processor and a communication interface, wherein the processor executes the steps in the method designed in the first aspect, the second aspect or the third aspect.

The tenth aspect is a chip module of the present application, comprising a transceiver component and a chip, wherein the chip comprises a processor, wherein the processor executes the steps in the method designed in the first aspect, the second aspect or the third aspect above.

In the eleventh aspect, a computer-readable storage medium of the present application is provided, wherein a computer program or instruction is stored therein, and when the computer program or instruction is executed, the steps in the method designed in the first aspect, the second aspect, or the third aspect are implemented. For example, the computer program or instruction is executed by a processor.

A twelfth aspect is a computer program product of the present application, comprising a computer program or an instruction, wherein when the computer program or the instruction is executed, the steps in the method designed in the first aspect, the second aspect or the third aspect are implemented. For example, the computer program or the instruction is executed by a processor.

The beneficial effects brought about by the technical solutions of the second to twelfth aspects can be referred to the technical effects brought about by the technical solutions of the first, second or third aspects, and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present application;

FIG2 is a schematic flow chart of a wake-up signal processing method according to an embodiment of the present application;

FIG3 is a flow chart of another method for processing a wake-up signal according to an embodiment of the present application;

FIG4 is a flow chart of another method for processing a wake-up signal according to an embodiment of the present application;

FIG5 is a block diagram of functional units of a wake-up signal processing device according to an embodiment of the present application;

FIG6 is a block diagram of functional units of another wake-up signal processing device according to an embodiment of the present application;

FIG7 is a block diagram of functional units of another wake-up signal processing device according to an embodiment of the present application;

FIG8 is a schematic diagram of the structure of a network device according to an embodiment of the present application;

FIG9 is a schematic diagram of the structure of another network device according to an embodiment of the present application;

FIG. 10 is a schematic diagram of the structure of another network device according to an embodiment of the present application.

Detailed ways

It should be understood that the terms "first", "second", etc. involved in the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, software, product, or device that includes a series of steps or units is not limited to the listed steps or units, but also includes steps or units that are not listed, or also includes other steps or units inherent to these processes, methods, products, or devices.

The "embodiment" involved in the embodiments of the present application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In the embodiments of the present application, "and/or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and/or B can represent the following three situations: A exists alone; A and B exist at the same time; B exists alone. Among them, A and B can be singular or plural.

In the embodiment of the present application, the symbol "/" can indicate that the objects associated with each other are in an "or" relationship. In addition, the symbol "/" can also indicate a division sign, that is, performing a division operation. For example, A/B can indicate A divided by B.

In the embodiments of the present application, "at least one item" or similar expressions refer to any combination of these items, including any combination of single items or plural items, and refer to one or more, and multiple refers to two or more. For example, at least one item of a, b, or c can represent the following seven situations: a, b, c, a and b, a and c, b and c, a, b, and c. Among them, each of a, b, and c can be an element or a set containing one or more elements.

In the embodiments of the present application, "equal to" can be used in conjunction with greater than, and is applicable to the technical solution adopted when greater than, and can also be used in conjunction with less than, and is applicable to the technical solution adopted when less than. When equal to is used in conjunction with greater than, it is not used in conjunction with less than; when equal to is used in conjunction with less than, it is not used in conjunction with greater than.

In the embodiments of the present application, "of", "corresponding/relevant", "corresponding", and "indicated" may sometimes be used interchangeably. It should be noted that when the distinction is not emphasized, the meanings to be expressed are consistent.

The "connection" in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and there is no limitation on this.

The “network” in the embodiments of the present application can be expressed as the same concept as the “system”, and the communication system is the communication network.

The following is an explanation of the relevant contents, concepts, meanings, technical issues, technical solutions, beneficial effects, etc. involved in the embodiments of the present application.

1. Communication systems, terminal equipment and network equipment

1. Communication system

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE-based Access to Unlicensed Spectrum (LTE-U) system, NR-based Access to Unlicensed Spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wi-Fi), 6th-Generation (6G) communication system or other communication systems, etc.

It should be noted that the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, communication systems can not only support traditional communication systems, but also support device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine type communication (MTC), vehicle-to-vehicle (V2V) communication, vehicle-to-everything (V2X) communication, narrowband Internet of Things (NB-IoT) communication, etc. Therefore, the technical solution of the embodiment of the present application can also be applied to the above communication systems.

In addition, the technical solutions of the embodiments of the present application can be applied to beamforming (beamforming), carrier aggregation (CA), dual connectivity (DC) or standalone (SA) deployment scenarios, etc.

In the embodiment of the present application, the spectrum used for communication between the terminal device and the network device, or the spectrum used for communication between the terminal devices, can be a licensed spectrum or an unlicensed spectrum, without limitation. In addition, the unlicensed spectrum can be understood as a shared spectrum, and the licensed spectrum can be understood as a non-shared spectrum.

Since the embodiments of the present application describe various embodiments in conjunction with terminal devices and network devices, the terminal devices and network devices involved will be described in detail below.

2. Terminal equipment

Terminal equipment can be a device with transceiver functions, and can also be called terminal, user equipment (UE), remote terminal equipment (remote UE), relay equipment (relay UE), access terminal equipment, user unit, user station, mobile station, mobile station, remote station, mobile device, user terminal equipment, intelligent terminal equipment, wireless communication equipment, user agent or user device. It should be noted that relay equipment is a terminal equipment that can provide relay forwarding services for other terminal equipment (including remote terminal equipment).

For example, the terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned autonomous driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

For another example, the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system (such as an NR communication system, a 6G communication system), or a terminal device in a future evolved public land mobile communication network (PLMN), etc., without specific limitation.

In some possible implementations, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; can be deployed on the water surface (such as ships, etc.); can be deployed in the air (such as airplanes, balloons and satellites, etc.).

In some possible implementations, the terminal device may include a device with wireless communication functions, such as a chip system, a chip, or a chip module. For example, the chip system may include a chip and may also include other discrete devices.

3. Network equipment

A network device may be a device with transceiver functions, used for communicating with terminal devices.

In some possible implementations, the network equipment may be responsible for radio resource management (RRM), quality of service (QoS) management, data compression and encryption, data transmission and reception, etc. on the air interface side.

In some possible implementations, the network device may be a base station (BS) in a communication system or a device deployed in a radio access network (RAN) to provide wireless communication functions.

For example, the network device can be an evolved node B (eNB or eNodeB) in an LTE communication system, a next generation evolved node B (ng-eNB) in an NR communication system, a next generation node B (gNB) in an NR communication system, a master node (MN) in a dual connection architecture, a second node or secondary node (SN) in a dual connection architecture, etc., without specific restrictions.

In some possible implementations, the network device may also be a device in the core network (CN), such as access and mobility management function (AMF), user plane function (UPF), etc.; it may also be an access point (AP) in WLAN, a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, etc.

In some possible implementations, the network device may include a device that provides wireless communication functions for the terminal device, such as a chip system, Chip, chip module. For example, the chip system may include a chip, or may include other discrete devices.

In some possible implementations, the network device can communicate with an Internet Protocol (IP) network, such as the Internet, a private IP network, or other data networks.

In some possible implementations, the network device may be an independent node to implement the functions of the above-mentioned base station, or the network device may include two or more independent nodes to implement the functions of the above-mentioned base station. For example, the network device includes a centralized unit (CU) and a distributed unit (DU), such as gNB-CU and gNB-DU. Further, in some other embodiments of the present application, the network device may also include an active antenna unit (AAU). Among them, the CU implements part of the functions of the network device, and the DU implements another part of the functions of the network device. For example, the CU is responsible for processing non-real-time protocols and services, and implements the functions of the radio resource control (RRC) layer, the service data adaptation (SDAP) layer, and the packet data convergence (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services, and implements the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. In addition, the AAU can implement some physical layer processing functions, RF processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this network deployment, high-level signaling (such as RRC signaling) can be considered to be generated by the CU, sent by the DU, or sent jointly by the DU and the AAU. It can be understood that the network device may include at least one of the CU, DU, and AAU. In addition, the CU can be classified as a network device in the RAN, or the CU can be classified as a network device in the core network, without specific limitation.

In some possible implementations, the network device may be any one of the multiple sites that perform coherent joint transmission (CJT) with the terminal device, or other sites outside the multiple sites, or other network devices that perform network communication with the terminal device, and no specific restrictions are made to this. Among them, multi-site coherent cooperative transmission may be joint coherent transmission of multiple sites, or different data belonging to the same physical downlink shared channel (PDSCH) are sent from different sites to the terminal device, or multiple sites are virtualized into one site for transmission. Names with the same meaning specified in other standards are also applicable to this application, that is, this application does not limit the names of these parameters. The sites in multi-site coherent cooperative transmission may be remote radio heads (RRH), transmission and reception points (TRP), network devices, etc., and no specific restrictions are made to this.

In some possible implementations, the network device may be any one of the multiple sites that perform incoherent collaborative transmission with the terminal device, or other sites outside the multiple sites, or other network devices that perform network communications with the terminal device, and there is no specific limitation on this. Among them, multi-site incoherent collaborative transmission may be multiple sites joint incoherent transmission, or different data belonging to the same PDSCH is sent from different sites to the terminal device, or different data belonging to the same PDSCH is sent from different sites to the terminal device, and the names with the same meaning specified in other standards are also applicable to this application, that is, this application does not limit the names of these parameters. The sites in multi-site incoherent collaborative transmission may be RRH, TRP, network equipment, etc., and there is no specific limitation on this.

In some possible implementations, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

In some possible implementations, a network device may provide services for a cell, and a terminal device in the cell may communicate with the network device through transmission resources (such as spectrum resources). The cell may be a macro cell, a small cell, a metro cell, a micro cell, a pico cell, a femto cell, etc.

4. Example

The following is an exemplary description of the communication system in an embodiment of the present application.

For example, a network architecture of a communication system according to an embodiment of the present application may refer to FIG1 . As shown in FIG1 , a communication system 10 may include a network device 110 and a terminal device 120 .

FIG1 is only an example of a network architecture of a communication system, and does not limit the network architecture of the communication system of the embodiment of the present application. For example, the communication system 10 may also include a server or other devices. For another example, the communication system 10 may include multiple network devices and/or multiple terminal devices.

2. Main Radio

It should be noted that the main radio, which can also be called the main transceiver, overall transceiver or regular transceiver, has a complete RF and baseband processing architecture. The main radio can be regarded as a module for transmitting and receiving 5G NR signals/channels in addition to low-power wake-up signals.

1. Paging-related physical downlink control channel (PDCCH)

Generally speaking, in the RRC_IDLE state or the RRC_INACTIVE state, the terminal device needs to monitor the paging-related PDCCH, also known as type 2-PDCCH. The radio network temporary identity (RNTI) of the paging-related PDCCH is P-RNTI, and the downlink control information (DCI) format used is DCI format 1-0.

When the terminal device detects the paging-related PDCCH (CRC is successfully descrambled using P-RNTI), the terminal device can parse the DCI. DCI may contain a short message so that the terminal device can obtain warning information or update system information. In addition, the DCI may also contain scheduling information so that the terminal device can receive the physical downlink shared channel (PDSCH) related to paging, thereby obtaining the paging message and further initiating a random access process to enter the connected state (RRC_CONNECTED state).

The functions of the paging message are as follows:

(1) Send a call request to a terminal device in the RRC_IDLE state;

(2) Notifying a terminal device in the RRC_IDLE state, RRC_INACTIVE state, or RRC_CONNECTED state that system information has changed;

(3) Instruct the terminal device to start receiving Earthquake and Tsunami Warning System (ETWS) primary notifications and/or ETWS secondary notifications; instruct the terminal device to start receiving Commercial Mobile Alert System (CMAS) notifications.

In addition, before the terminal device obtains the paging message, the terminal device needs to use a reference signal (e.g., SSB) to complete time-frequency synchronization and complete the adjustment of the automatic gain control (AGC).

The monitoring timing of paging-related PDCCH can be configured by the search space set (SSS).

Terminal devices in RRC_IDLE or RRC_INACTIVE state can use the discontinuous reception (DRX) mechanism to receive paging messages to reduce power consumption. A DRX cycle can contain at least one paging frame (PF).

Among them, a PF can be a radio frame or a system frame, which can contain one or more paging occasions (PO) or a PO starting point.

Among them, PO can be used to determine the starting point of the monitoring opportunity within the PF, can indicate the time domain position of the paging-related PDCCH, can be used to transmit paging downlink control information (paging DCI), can be composed of multiple subframes, multiple time slots or multiple OFDM symbols, and can be composed of multiple paging-related PDCCH monitoring opportunities. The monitoring opportunity of the paging-related PDCCH can also be called the paging PDCCH monitoring occasion (paging PDCCH monitoring occasion, PMO). Therefore, a PO can contain multiple PMOs, or a PO is composed of a group of PMOs.

Among them, PMO is a plurality of monitoring opportunities in sequence starting from the starting point, and PMO is associated one-to-one with the SSB actually sent.

Among them, the terminal device can determine the location of the PF or PO to which it belongs based on its own equipment identifier (UE_ID).

It should be noted that the PO in the embodiment of the present application can be understood as a paging opportunity, or as a terminal subgroup (UE subgroup) corresponding to the PO or a terminal group (UE group) corresponding to the PO. Among them, the terminal subgroup (terminal group) corresponding to the PO can be understood as a set of terminals corresponding to/mapped to/associated with the same PO. Among them, one PO can correspond to one terminal subgroup (terminal group), and there is no specific limitation on this.

2. Radio Resource Management (RRM) measurement

In the RRC_IDLE state or RRC_INACTIVE state, the terminal device also needs to perform periodic RRM measurements, which may include serving cell measurements and neighboring cell measurements.

Neighboring cell measurements can include:

The network device gives a given frequency point, and the terminal device can search for cells and measure at the frequency point; or,

The network device provides a given frequency and physical cell ID (PCI), and the terminal device can use the PCI to search and measure cells at the frequency; or,

The network equipment does not give a given frequency point or PCI, but the terminal equipment can autonomously search for and measure cells.

Neighbor cell measurement can be divided into intra-frequency measurement and inter-frequency measurement.

For example, if the center frequency and subcarrier spacing of the SSB in the measurement object of the neighboring cell are the same as those of the SSB in the serving cell, then the measurement is a co-frequency measurement.

For example, if the center frequency or subcarrier spacing of the SSB in the measurement object of the neighboring cell is different from that of the SSB in the serving cell, then the measurement is an inter-frequency measurement.

In the RRC_IDLE state or RRC_INACTIVE state, the terminal device generally needs to perform an RRM measurement of the serving cell within a paging cycle. The paging cycle is also called the DRX cycle or the idle state DRX cycle.

Therefore, in the RRC_IDLE state or the RRC_INACTIVE state, monitoring the paging-related PDCCH and performing RRM measurements are the main tasks of the terminal device.

3. Paging early indication (PEI)

In order to monitor the paging-related PDCCH and perform RRM measurements, generally speaking, the network equipment needs to wake up the paging terminal device from deep sleep in advance to process three synchronization signal block bursts (SS/PBCH block burst, SSB burst) to achieve a certain time-frequency synchronization to monitor the paging-related PDCCH and perform RRM measurements at the same time.

In the process of monitoring the PDCCH related to paging, in order to avoid unnecessary monitoring and save power consumption of the terminal device, in the RRC_IDLE state or RRC_INACTIVE state, the network device can configure PEI, which can be used to indicate whether the terminal device needs to continue to monitor the PDCCH related to paging, so as to achieve the purpose of saving power consumption. Among them, PEI can be downlink control information or sequence, etc.

When PEI is configured, the terminal device can wake up from deep sleep to process an SSB burst in order to achieve a certain time and frequency synchronization to detect Measure PEI.

If the PEI indicates the need to continue monitoring the paging-related PDCCH, the terminal device continues to process the remaining 2 SSB bursts and continues to monitor the paging-related PDCCH.

If the PEI indicates that there is no need to continue monitoring the monitoring timing of the paging-related PDCCH, the terminal device returns to deep sleep.

At a group paging rate of 10%, there is a 10% chance that the terminal device needs to monitor the PDCCH related to paging. Therefore, at a 10% chance, the terminal device needs to process 3 SSB bursts, monitor the PDCCH related to paging, and perform RRM measurements. At a 90% chance, the terminal device only needs to process 1 SSB burst and perform RRM measurements. Therefore, at a 90% chance, the terminal device processes fewer signals/channels, wakes up for a shorter time (if it does not process signals/channels after waking up from deep sleep, it is in light sleep), and consumes less power.

In summary, by using PEI, terminal equipment can achieve the goal of saving power.

3. Low-power wake-up signal and low-power wake-up signal receiver

It should be noted that the low power wake-up signal receiver can also be called a low power receiver, a wake-up signal receiver (WUS receiver), etc. The low power wake-up signal receiver can be regarded as a module mainly used to receive signals/channels related to the low power wake-up signal. 1. Low power wake-up signal (LP-WUS)

The network device can wake up the terminal device from a deep sleep state, such as power saving mode (PSM), by sending a low-power wake-up signal. Accordingly, the terminal device determines whether it needs to exit the deep sleep state to enter the RRC_IDLE state, RRC_INACTIVE state, or RRC_CONNECTED state by listening to/detecting the low-power wake-up signal. In this way, the terminal device can enter a deep sleep state and be woken up by the network at the same time.

In order to simplify the description, the low-power wake-up signal in this article can also be referred to as the wake-up signal (WUS). In other words, the "low-power wake-up signal" mentioned in this application can be uniformly referred to as the "wake-up signal".

2. Low power wake-up signal receiver

In some scenarios, the terminal device can only turn on a low-power wake-up signal receiver independent of the main radio. In this way, the terminal device can turn off the main radio to achieve energy saving (reduced power consumption), and can also listen to the low-power wake-up signal through the low-power wake-up signal receiver to wait for the network to wake up, so as to achieve network accessibility. Through the main radio and the low-power wake-up signal receiver, both energy saving and network accessibility are taken into account. In some scenarios, the low-power wake-up signal receiver can listen to the low-power wake-up signal at a denser frequency, so that the terminal device can be awakened with a lower latency. Therefore, the low-power wake-up signal receiver also has the potential benefit of reducing latency.

In order to simplify the description, the low power wake-up signal receiver in this article may also be referred to as a low power receiver (LPR). In other words, the "low power wake-up signal receiver" mentioned in this application may be referred to as a "low power receiver".

3. Receiving method of low power receiver

In the embodiment of the present application, the low power consumption receiver may have the following two types of receiving methods:

◆The first type of receiving method

The first type of receiving method may be that the low power consumption receiver periodically detects the wake-up signal.

In this method, the power consumption of a single detection of the wake-up signal is high, but due to the long cycle (the low-power receiver only needs to wake up once every long cycle to detect), the average power consumption is low. Since it needs to wake up periodically for detection, the low-power receiver requires accurate time synchronization.

In addition, under this method, due to frequency drift, the low-power receiver will have an erroneous timing. When the period is too large, the accumulated timing error will be too large; when the timing error exceeds a certain level (such as exceeding a fraction or a modulation symbol), the demodulation and decoding performance drops sharply, which is manifested as a large miss detection rate (MDR) and/or false alarm rate (FAR).

◆The second receiving method

The second type of receiving method may be that the low-power receiver may be in a state of detecting a wake-up signal all the time (also called a stand-by state).

In this method, the power consumption of a single detection of the wake-up signal is low, and although the detection is always in progress, the average power consumption is also low. Since the detection is always in progress, the low-power receiver does not need very accurate time synchronization.

In this method, when the network device does not send a wake-up signal for a long time, the accumulated timing deviation will also be too large. When the timing deviation exceeds a certain degree (such as more than a fraction or a modulation symbol), although the low-power receiver can assume multiple time points as the starting point of the wake-up signal for detection (if the wake-up signal is a channel, it is demodulated and decoded, if the wake-up signal is a signal, it is sequence-related operations), which can reduce the impact of the timing deviation, but if it is not synchronized for a long time, the time interval between the network device sending the wake-up signal and the low-power receiver detecting the wake-up signal is too large, resulting in excessive delay.

Therefore, the wake-up signal may also include a synchronization signal for low-power reception synchronization (at least to correct timing deviations for envelope detection). The synchronization signal may not use OOK modulation. The synchronization signal may be sent in the form of a frequency domain sequence. Since the frequency domain sequence appears as a filtered time domain sequence in the time domain, the receiver may use a time domain correlation method (i.e., the received time domain signal is correlated with a time domain version of the local sequence or a portion of the sequence). In fact, the time domain correlation method is equivalent to the frequency domain dot product method (i.e., the received frequency domain signal is correlated with the frequency domain version of the local sequence or a portion of the sequence). domain version for dot product).

4. Architecture of low power receiver

In the embodiment of the present application, the low power consumption receiver may have the following three architectures:

◆The first architecture is based on zero intermediate frequency (zero IF) envelope detection architecture, which can be completed in the baseband.

◆The second architecture is based on a low IF (low IF) envelope detection architecture, which can be performed in the IF.

◆The third architecture is an RF-based envelope detection architecture, which can be completed in the RF.

The above three architectures can all implement the above two types of receiver methods.

5. Modulation of wake-up signal

In an embodiment of the present application, in order to reduce the complexity of the low power receiver, the wake-up signal can adopt an on-off keying (OOK) modulation method.

This is because OOK modulation only has amplitude information, but no frequency or phase information, and the amplitude has only two amplitudes: high and low (or zero). For OOK, the receiving method can be envelope detection, which can directly accumulate the amplitude of the received signal. Due to its simplicity, the power consumption required is also low. In this way, the low-power receiver in the terminal device can be simplified to detect the energy of the modulation symbol (rather than the amplitude/phase of the modulation symbol). As long as the energy of the modulation symbol is detected to exceed a certain threshold, it can be judged as on, otherwise it is judged as off.

In addition, since the processing is performed at the radio frequency or intermediate frequency, an envelope detection method can be used.

6. Waveform of wake-up signal

The waveform of the wake-up signal can be a single-tone waveform or a single-carrier waveform, or a multi-tone waveform or a multi-carrier waveform.

For OOK in a single-tone waveform or a single-carrier waveform, an OOK modulation symbol may be a time-domain symbol of a single tone or a single carrier.

For OOK under multi-tone waveform or multi-carrier waveform, an OOK modulation symbol can be a multi-tone or multi-carrier time domain symbol, such as an orthogonal frequency division multiplexing (OFDM) time domain symbol.

For OOK under multi-tone or multi-carrier waveform, at the transmitting end (such as a network device), the values of multiple subcarriers of a modulation symbol can be random or preset.

In order to map multiple OOK modulation symbols to one OFDM symbol, waveform shaping is often required, such as precoding the OOK modulation symbol sequence (such as DFT precoding, quasi-inverse-based precoding) and then mapping it to the corresponding subcarrier. Another advantage of this is that one OFDM symbol contains both OOK modulation symbols for low-power wake-up signals and modulation symbols for other signal channels.

For OOK under multi-tone or multi-carrier waveforms, at the receiving end (such as a low-power receiver in a terminal device), one method is envelope detection. This method has low complexity and low power consumption at the receiving end, but poor detection performance. Another method is sequence detection. In this method, the OOK sequence is detected by correlating the received sequence with the local sequence. This method has good detection performance, but high complexity, high power consumption at the receiving end, and the number of bits carried in the sequence is generally small.

4. Optimization of the wake-up signal sequence

Inter-cell interference randomization is very beneficial to the communication process in the communication system. In order to achieve the purpose of inter-cell interference randomization, it is usually necessary to ensure that the sequence (channel/signal) to be transmitted has a longer sequence length so as to reduce the correlation/association between each sequence (channel/signal).

However, since the sequence length of the wake-up signal is relatively short, when there are many cell identifiers (cell IDs), the randomization of interference between cells may not be guaranteed by the wake-up signal. Therefore, the embodiment of the present application considers optimizing the sequence of the wake-up signal to increase the sequence length of the wake-up signal through optimization, or to increase the data length of the wake-up signal, so as to reduce the correlation/association between the wake-up signals as much as possible and ensure the randomization of interference between cells.

2. Sequence of wake-up signals

It should be noted that, with respect to the understanding of the sequence of the wake-up signal, the wake-up signal can be represented in the form of a sequence at a high level (such as the RRC layer or the MAC layer) or a physical layer, and the sequence can represent a bit sequence or a combination of multiple bits, so that the sequence can be processed accordingly (such as channel coding, bit-level processing, etc.).

For a bit sequence, the bit sequence may be composed of multiple bits, so the embodiments of the present application may perform corresponding processing on these bits.

In addition, since each bit in the bit sequence may be arranged in order from low to high, all the bits in the bit sequence may include a plurality of highest order bits and a plurality of lowest order bits.

For example, the bit sequence consists of 8 bits, and the 8 bits are "hgfedcba", where 'a' is the 0th bit, 'b' is the 1st bit, 'c' is the 2nd bit, ..., and 'h' is the 7th bit.

For multiple least significant bits, the 0th bit (i.e., "a") can be regarded as 1 least significant bit; the 0th bit and the 1st bit (i.e., "ba") can be regarded as 2 least significant bits; the 0th bit, the 1st bit, and the 2nd bit (i.e., "cba") can be regarded as 3 least significant bits, and so on.

For multiple highest bits, the 7th bit (i.e. "h") can be regarded as a highest bit; the 7th bit and the 6th bit (i.e., "hg") can be regarded as the 2 most significant bits; the 7th bit, the 6th bit, and the 5th bit (i.e., "hgf") can be regarded as the 3 most significant bits, and so on.

3. Specific implementation methods

The following embodiments of the present application will illustrate how to optimize the sequence of wake-up signals from multiple implementations. Among them, various implementations can be arbitrarily combined to form new implementations, and the new implementations are also within the scope of protection claimed by the present application, which will not be described in detail.

Implementation 1:

①Description

In "Implementation 1", the embodiment of the present application needs to increase the sequence length, that is, increase the number of bits in the sequence.

For ease of description and distinction, the present embodiment introduces a first sequence and a second sequence, and processes the first sequence to output the second sequence, wherein the sequence length (ie, the number of bits) of the second sequence is greater than the sequence length (ie, the number of bits) of the first sequence.

Specifically, the processing may include repetition, upsampling or bit filling.

It should be noted that repetition or upsampling can be understood as using the original bits of the first sequence to perform bit repetition filling or upsampling, so as to increase the number of bits of the first sequence, thereby outputting/obtaining the second sequence.

For example, if the first sequence includes 32 bits, the transmitter of the network device may repeat or upsample the 32 bits. The repetition or upsampling is to repeat and fill the 32 bits 36 times, and finally obtain 1152 bits.

The filling bits may be filled by repeatedly filling with the original bits of the first sequence, or may be filled by repeatedly filling with preset bits (such as empty bits), etc., so as to increase the number of bits of the first sequence, thereby outputting/obtaining the second sequence.

In this way, the sequence length of the first sequence is increased through processing, that is, the number of bits of the first sequence is increased, so as to reduce the correlation/association between the first sequences as much as possible and ensure the randomization of inter-cell interference.

②First sequence

In some possible implementations, the first sequence may represent a sequence of a wake-up signal, may be an encoded bit sequence, may be an encoded bit sequence of a wake-up signal, such as an encoded codeword, etc. Correspondingly, the second sequence may be a bit sequence after processing (such as repeating or upsampling) the first sequence.

For example, the transmitter of the network device may encode a partial UE ID having 16 bits in the wake-up signal to obtain a bit sequence having 32 bits (ie, a first sequence).

For another example, the first sequence q is a bit sequence and is the total number of bits in the first sequence q. After processing the first sequence q (such as repeating or upsampling), the output second sequence is the bit sequence

Specifically, the coding may be channel coding (Channel Coding), and may also be cyclic redundancy check (CRC) addition, channel coding, and may also be CRC addition, code block segmentation (Code Block Segmentation) and code block CRC addition, channel coding, rate adaptation (Rate Matching), and code block concatenation (Code Block Concatenation). Channel coding may be a forward error correction coding (Forward Error Correcting Coding).

③ One or more OFDM symbols carry the first sequence

In some possible implementations, the first sequence may be carried in one or more OFDM symbols.

It should be noted that since the sequence length of the wake-up signal is short, and the sequence length of the first sequence obtained by encoding the sequence of the wake-up signal may still be short, this may cause the number of bits to be carried to be much smaller than the number of bits that can be carried by the number of subcarriers allocated in one or more OFDM symbols. Therefore, the present application matches the number of bits to be carried with the number of subcarriers allocated in one or more OFDM symbols through processing (such as repetition or upsampling).

In this way, the embodiment of the present application can increase the sequence length of the first sequence (ie, increase the number of bits of the first sequence) through the above-mentioned processing (such as repetition or upsampling) to make it as close as possible to the number of subcarriers finally mapped.

④Subsequent processing of the second sequence

a. Description

It should be noted that, in the embodiment of the present application, the second sequence may be modulated to output a third sequence, and the third sequence may be precoded to output a fourth sequence.

b. Modulation

Modulation can be a shifting keying or constellation generation process. Specifically, modulation can be OOK modulation, phase shift keying (PSK) modulation, frequency shift keying (FSK) modulation, amplitude shift keying (ASK) modulation or quadrature amplitude modulation (QAM). The third sequence can be regarded as a "time domain" symbol or modulation symbol.

For example, the second sequence is a bit sequence In the second sequence Line modulation, output the third sequence as modulation symbol

That is, the transmitter of the network device can modulate the second sequence output by processing (such as repetition or upsampling), thereby converting the second sequence into a modulation symbol. The modulation symbol can also be called a "time domain" symbol, because OOK modulation is generally time domain modulation, and its corresponding waveform is generally a single carrier waveform.

For example, if the second sequence has 1152 bits, and the 1152 bits need to be carried by 8 OFDM symbols, then each OFDM symbol carries 114 bits. Then, the 114 bits on each OFDM symbol are modulated to obtain 144 modulation symbols.

It should be noted that, in combination with the content in "8. Modulation of wake-up signal" above, the network device can modulate through OOK, and the low-power receiver in the terminal device can demodulate through OOK. Due to the simplicity of OOK, the low-power receiver in the terminal device can be simplified to detect the energy of the modulation symbol, as long as the energy of the modulation symbol is detected to exceed a certain threshold, thereby simplifying the low-power receiver.

c. Precoding

Specifically, precoding can be used to perform "domain conversion" (such as converting "time domain" to "frequency domain") on the third sequence to obtain a fourth sequence, and map it to the subcarrier. The fourth sequence can be regarded as a "frequency domain" symbol because it is mapped to the frequency domain subcarrier.

That is, network equipment can convert modulation symbols into "frequency domain" symbols through precoding and map them to subcarriers for frequency division multiplexing with other OFDM-based signals/channels.

For example, if the second sequence has 1152 bits, and the 1152 bits need to be carried by 8 OFDM symbols, each OFDM symbol carries 114 bits. Then, the 114 bits on each OFDM symbol are modulated to obtain 144 modulation symbols. Finally, the 144 modulation symbols are precoded to obtain 144 "frequency domain" symbols to be mapped to 144 subcarriers.

It should be noted that, in combination with the content in the above “9. Waveform of wake-up signal”, waveform shaping is achieved through precoding, so that one OFDM symbol contains both OOK modulation symbols for low-power wake-up signals and modulation symbols for other signal channels.

Specifically, precoding may include discrete Fourier transform (DFT) precoding or quasi-inverse based precoding.

It can be seen that through DFT precoding or quasi-inverse-based precoding, the low-power receiver of the terminal device can detect OOK symbols through IDFT deprecoding or without deprecoding, thereby reducing the power consumption of the low-power receiver.

Implementation 2:

①Description

Based on the content of the above "Implementation 1", in "Implementation 2", the embodiment of the present application also processes the first sequence (such as repeating or upsampling) to output the second sequence. Here, the difference from the above "Implementation 1" is that the scrambling of the second sequence is additionally considered in the subsequent processing of the second sequence, which is described in detail below.

②Subsequent processing of the second sequence

a. Description

It should be noted that, in the embodiment of the present application, the second sequence can be scrambled to output a fifth sequence, the fifth sequence can be modulated to output a sixth sequence, and finally the sixth sequence can be pre-encoded to output a seventh sequence.

b. Scrambling

Specifically, scrambling can be used to multiply the second sequence with a scrambling sequence to output a fifth sequence. In this way, scrambling can ensure that the inter-cell interference is randomized as much as possible, thereby reducing the inter-cell interference.

For example, the second sequence is a bit sequence After scrambling the second sequence, the fifth sequence is output as a bit sequence Among them, the i Bits The definition is as follows:

Wherein, c ^(q) (i) represents the scrambling sequence, which is a pseudo-random sequence c(n), the length of c(n) is M _PN , and n = 0, 1, ..., M _PN -1, and is defined as follows:
c(n)＝( _x1 (n+ _NC )+ _x2 (n+ _NC ))mod2
x ₁ (n+31)＝(x ₁ (n+3)+x ₁ (n))mod2
_x2 (n+31)=( _x2 (n+3)+ _x2 (n+2)+ _x2 (n+1)+ _x2 (n))mod2

Where, N _C = 1600, and the first m-sequence x ₁ (n) is initialized as:
x ₁ (0) = 1, x ₁ (n) = 0, n = 1, 2, ..., 30;

The initialization of the second m-sequence x ₂ (n) is determined by the following formula:

c _init represents a scrambling initialization sequence, and c _init can be used for initializing x ₂ (n), and c _init can carry a maximum of 31 bits of information.

Here, c _init may be used as an initial value of a scrambling sequence generator, which may be used to generate a scrambling sequence and may be defined as follows:

or,

Where f() represents the generating function;

Indicates part or all of the bits of the cell identity (ID), and there are 1008 unique cell identifiers, which are defined as follows:

in, And it can be determined based on the primary synchronization signal (PSS); And it can be determined according to a secondary synchronization signal (SSS).

n _ID ∈{0,1,…,1023} represents data scrambling identity;

n _RNTI corresponds to the Radio Network Temporary Identity (RNTI) related to transmission.

In summary, in some possible implementations, the scrambling code sequence used for scrambling or the initial value c _init of the scrambling code sequence generator may include the cell identifier In this way, the fifth sequence output by scrambling can carry the cell identifier, so that the wake-up signal can carry the cell identifier.

Optionally, the cell identifier may be part of the bits or all of the bits of the cell identifier. That is, the wake-up signal may carry part of the bits or all of the bits of the cell identifier. When the wake-up signal carries part of the bits of the cell identifier, the remaining bits of the cell identifier need to be carried by other signals.

Optionally, in combination with the content in “2. Sequence of wake-up signal” above, some bits of the cell identifier may include multiple highest bits or multiple lowest bits of the cell identifier.

c. Modulation

Modulation can be a keying or constellation generation process. Specifically, the modulation can be OOK modulation, PSK modulation, FSK, ASK modulation or QAM. The sixth sequence can be regarded as a modulation symbol. The modulation symbol can also be called a "time domain" symbol, because OOK modulation is generally time domain modulation, and its corresponding waveform is generally a single carrier waveform.

That is, the network device may scramble the second sequence after processing (such as repetition or up-sampling), and then modulate the fifth sequence output by scrambling to output a sixth sequence.

For example, if the second sequence has 1152 bits, the 1152 bits are scrambled to obtain 1152 scrambled bits. If the scrambled 1152 bits need to be carried by 8 OFDM symbols, each OFDM symbol carries 114 scrambled bits. Then, the scrambled 114 bits on each OFDM symbol are modulated to obtain 144 "time domain" symbols or modulation symbols.

d. Precoding

Specifically, precoding can be used to perform "domain conversion" (such as converting "time domain" to "frequency domain") on the sixth sequence to obtain the seventh sequence, and map it to the subcarrier. The seventh sequence can be regarded as a "frequency domain" symbol because it is mapped to the frequency domain subcarrier.

For example, if the second sequence has 1152 bits, the 1152 bits are scrambled to obtain 1152 scrambled bits. If the scrambled 1152 bits need to be carried by 8 OFDM symbols, each OFDM symbol carries 114 scrambled bits. Then, the scrambled 114 bits on each OFDM symbol are modulated to obtain 144 modulation symbols. Finally, the 144 modulation symbols are precoded to obtain 144 "frequency domain" symbols to be mapped to 144 subcarriers.

Specifically, the precoding may include DFT precoding or quasi-inverse based precoding.

Implementation 3:

①Description

In "Implementation Method 3", the embodiment of the present application still needs to increase the sequence length, that is, increase the number of bits in the sequence.

The difference from the above-mentioned "Implementation 1" and "Implementation 2" is that in "Implementation 3", the embodiment of the present application performs The eighth sequence is modulated to output an eighth sequence, and the eighth sequence is precoded to output a ninth sequence. The ninth sequence has a sequence length (ie, the number of bits) greater than the sequence length (ie, the number of bits) of the first sequence.

It should be noted that the embodiment of the present application can fill the original bits of the first sequence through modulation and/or precoding (the filling can be repeated filling with the original bits multiple times, or can be repeated filling with preset bits (such as empty bits), etc.) to increase the number of bits of the first sequence, thereby outputting/obtaining the ninth sequence.

In this way, the sequence length of the first sequence is increased through modulation and precoding, that is, the number of bits of the first sequence is increased, so as to reduce the correlation/association between the first sequences as much as possible and ensure the randomization of inter-cell interference.

a. Modulation

Modulation is a keying or constellation generation process. Specifically, the modulation can be OOK modulation, PSK modulation, FSK modulation, ASK modulation or QAM. The eighth sequence can be regarded as a modulation symbol. The modulation symbol can also be called a "time domain" symbol, because OOK modulation is generally time domain modulation, and its corresponding waveform is generally a single carrier waveform.

For example, the first sequence q is a bit sequence and is the total number of bits in the first sequence q. When the first sequence q is modulated, the eighth sequence is output as the modulation symbol

That is to say, the network device can modulate the first bit sequence and output the eighth sequence.

In some possible implementations, the eighth sequence may be carried in one or more OFDM symbols.

It should be noted that since the sequence length of the first sequence is relatively short, and the sequence length of the eighth sequence obtained by modulating the first sequence may still be relatively short, this may cause the number of bits to be carried to be much smaller than the number of bits that can be carried by the number of subcarriers allocated in one or more OFDM symbols. Therefore, the present application matches the number of bits to be carried with the number of bits that can be carried by the number of subcarriers allocated in one or more OFDM symbols through processing (such as repetition or upsampling).

In this way, the embodiment of the present application can increase the sequence length of the eighth sequence (that is, increase the number of symbols of the eighth sequence) through the above-mentioned precoding, so that it is as close as possible to the number of subcarriers finally mapped.

Specifically, the number of symbols of the eighth sequence input by precoding is N, and the number of symbols of the ninth sequence output is N*X, where X is an integer greater than or equal to 1. That is, the number of symbols in the eighth sequence is increased by the above precoding.

For example, if the first sequence includes 32 bits, and the 32 bits need to be carried by 8 OFDM symbols, each OFDM symbol carries 4 bits. Then, the network device can modulate the 4 bits to obtain 4 modulation symbols. Finally, the 4 modulation symbols are precoded to obtain 144 "frequency domain" symbols to be mapped to 144 subcarriers. It can be seen that the number of input symbols of the precoding is 4, and the number of output symbols is 144. At this time, N=4, X=36, which is equivalent to 36 times the processing (such as repetition or upsampling).

b. Precoding

Specifically, precoding can be used to perform "domain conversion" (such as converting "time domain" to "frequency domain") on the eighth sequence to obtain the ninth sequence, and map it to the subcarrier. The ninth sequence can be regarded as a "frequency domain" symbol because it is mapped to the frequency domain subcarrier.

For example, the eighth sequence is The eighth sequence is precoded to output a ninth sequence as:

in, represents the total number of symbols in the ninth sequence, and W represents a precoding matrix.

Implementation 4:

①Description

Based on the content of the above "Implementation 3", in "Implementation 4", the embodiment of the present application also modulates the first sequence to output the eighth sequence, and then precodes the eighth sequence to output the ninth sequence. Here, the difference between the above "Implementation 3" and the implementation of the present application is that The ninth sequence also needs to be processed later, which is described in detail below.

② Subsequent processing of the ninth sequence

a. Description

It should be noted that, in the embodiment of the present application, the ninth sequence can be scrambled to output the tenth sequence.

b. Scrambling

Specifically, scrambling can be used to multiply the ninth sequence by the scrambling sequence to output a tenth sequence. In this way, the inter-cell interference can be randomized as much as possible through scrambling, thereby reducing the inter-cell interference. The scrambling sequence can be a dual-polarized scrambling sequence, that is, a unipolarized scrambling sequence (such as a value of 0 or 1) is converted into a dual-polarized sequence (such as a value of 1 or -1).

For example, the ninth sequence is After scrambling the ninth sequence, the output tenth sequence is Among them, Symbols The definition is as follows:

Wherein, g() represents the symbol scrambling function;

c ^(q) (j) represents the scrambling code sequence, which is a pseudo-random sequence c(n). The length of c(n) is M _PN , and n = 0, 1, ..., M _PN -1, and is defined as follows:
c(n)＝( _x1 (n+ _NC )+ _x2 (n+ _NC ))mod2
x ₁ (n+31)＝(x ₁ (n+3)+x ₁ (n))mod2
_x2 (n+31)=( _x2 (n+3)+ _x2 (n+2)+ _x2 (n+1)+ _x2 (n))mod2

c _init represents a scrambling initialization sequence, and c _init can be used for initialization of x ₂ (n), and c _init can carry a maximum of 31 bits of information.

Here, c _init may be used as an initial value of a scrambling sequence generator, which may be used to generate a scrambling sequence (single-polarization scrambling sequence) and may be defined as follows:

or,

Among them, h() represents the generating function.

In summary, in some possible implementations, the scrambling code sequence used for scrambling or the initial value c _init of the scrambling code sequence generator may include the cell identifier In this way, the tenth sequence output by scrambling can carry the cell identifier, so that the wake-up signal can carry the cell identifier.

Implementation 5:

①Description

In the above-mentioned "Implementation 1" or "Implementation 2", the transmitter of the network device increases the sequence length by processing (such as repetition or upsampling). However, since the sampling rate of the low-power receiver of the terminal device is lower than the sampling rate of the transmitter of the network device, the network device only performs processing once, which may not guarantee the descrambling of the low-power receiver of the terminal device.

For example, if the second sequence output by the transmitter of the network device after one processing has 1152 bits, and the 1152 bits need to be carried by 8 OFDM symbols, then each OFDM symbol carries 114 bits. Then, the 114 bits on each OFDM symbol are modulated to obtain 144 modulation symbols. Finally, the 144 modulation symbols are precoded to obtain 144 "frequency domain" symbols to be mapped to 144 subcarriers.

At this time, for the 15kHz subcarrier, the sampling rate of the transmitter of the network device is at least 15kHz*144=2.16M (sample/second). However, since the sampling rate of the analog digital converter (ADC) of the low-power receiver of the terminal device is often lower than the sampling rate of the ADC of the main radio and lower than the sampling rate of the transmitter of the network device, for the 15kHz subcarrier, the sampling rate of the low-power receiver of the terminal device is at least 15kHz*16=240k (sample/second). Since the sampling rate of the low-power receiver of the terminal device is 240k (sample/second), which is lower than the sampling rate of the transmitter of the network device, 2.16M (sample/second), the network device only performs processing once, which may not guarantee the descrambling of the low-power receiver of the terminal device.

Based on this, in "Implementation 5", the embodiment of the present application can perform a first processing on the first sequence to output the eleventh sequence, and then perform a second processing, thereby ensuring the descrambling of the low-power receiver of the terminal device. Among them, the sequence length (ie, the number of bits) of the eleventh sequence is greater than the sequence length (ie, the number of bits) of the first sequence.

Specifically, the first processing may include the first repetition, the first upsampling, or the first bit filling.

It should be noted that the first repetition or the first upsampling can be understood as using the original bits of the first sequence to perform the first bit repetition filling or upsampling so as to increase the number of bits of the first sequence, thereby outputting/obtaining the eleventh sequence.

For example, if the first sequence includes 32 bits, the transmitter of the network device may perform a first repetition or a first upsampling on the 32 bits, such as repeating or upsampling the 32 bits 4 times, and finally obtain 128 bits in the eleventh sequence.

The first filling bit may be the first multiple-repetition filling using the original bits of the first sequence, or the first multiple-repetition filling using preset bits (such as empty bits), etc., so as to increase the number of bits of the first sequence, thereby outputting/obtaining the second sequence.

In this way, the sequence length of the first sequence is increased through the first processing, that is, the number of bits of the first sequence is increased, so as to reduce the correlation/association between the first sequences as much as possible and ensure the randomization of inter-cell interference.

② Subsequent processing of the eleventh sequence

a. Description

It should be noted that, in the embodiment of the present application, the eleventh sequence can be scrambled to output the twelfth sequence, and the twelfth sequence can be repeated for a second time or upsampled for a second time to output the thirteenth sequence, and finally the thirteenth sequence can be modulated to output the fourteenth sequence, and the fourteenth sequence can be precoded to output the fifteenth sequence.

In addition, it should be noted that the first processing may not be used. In this case, the first sequence may be scrambled to output the twelfth sequence, and the twelfth sequence may be repeated or upsampled a second time to output the thirteenth sequence, and finally the thirteenth sequence may be modulated to output the fourteenth sequence, and the fourteenth sequence may be precoded to output the fifteenth sequence.

b. Scrambling

Specifically, scrambling can be used to multiply the eleventh sequence by the scrambling code sequence to output the twelfth sequence. In this way, the inter-cell interference can be randomized as much as possible through scrambling, thereby reducing the inter-cell interference.

For example, if the eleventh sequence includes 128 bits, the 128 bits are scrambled to obtain 128 scrambled bits in the twelfth sequence.

In some possible implementations, the scrambling code sequence used for scrambling or the initial value c _init of the scrambling code sequence generator may include the cell identifier In this way, the twelfth sequence output by scrambling can carry the cell identifier, so that the wake-up signal can carry the cell identifier.

c. Second processing

Specifically, the first processing may include a second repetition, a second upsampling, or a second bit filling, etc. It should be noted that the second repetition or the second upsampling may be understood as using the original bits of the twelfth sequence to perform a second bit repetition filling or upsampling, so as to increase the number of bits of the twelfth sequence, thereby outputting/obtaining the thirteenth sequence.

For example, if the twelfth sequence includes 128 bits, the transmitter of the network device may repeat or upsample the 32 bits for a second time, such as repeating or upsampling the 32 bits 9 times, and finally obtain 1152 bits in the thirteenth sequence.

The second filling bits may be a second multiple-repetition filling using the original bits of the twelfth sequence, or a second multiple-repetition filling using preset bits (such as empty bits), etc., so as to increase the number of bits of the twelfth sequence, thereby outputting/obtaining the thirteenth sequence.

In this way, the sequence length of the twelfth sequence is increased through the second processing (which can be understood as further increasing the sequence length of the first sequence), that is, increasing the number of bits of the twelfth sequence, while reducing the correlation/association between the first sequences as much as possible, ensuring the randomization of interference between cells, and ensuring the de-interference of the low-power receiver of the terminal device.

d. Modulation

The modulation may be a keying or constellation diagram (generation process. Specifically, the modulation may be OOK modulation, PSK modulation, FSK modulation, ASK modulation or QAM. The fourteenth sequence may be regarded as a modulation symbol. The modulation symbol may also be referred to as a "time domain" symbol, because OOK modulation is generally time domain modulation, and its corresponding waveform is generally a single carrier waveform.

That is, the network device may modulate the thirteenth sequence output after the second repetition or the second up-sampling to output the fourteenth sequence.

e. Precoding

Specifically, precoding can be used to perform "domain conversion" (such as converting "time domain" to "frequency domain") on the fourteenth sequence to obtain the fifteenth sequence, and map it to the subcarrier. The fifteenth sequence can be regarded as a "frequency domain" symbol because it is mapped to the frequency domain subcarrier.

4. An example of a wake-up signal processing method

1) Description

In combination with the contents of the above-mentioned "Implementation 1" and "Implementation 2", an example of a wake-up signal processing method in an embodiment of the present application is introduced below. It should be noted that the method can be applied to a network device. The network device can be a chip, a chip module or a communication module, etc., and there is no specific limitation on this.

As shown in FIG. 2 , it is a flowchart of a wake-up signal processing method according to an embodiment of the present application, which specifically includes the following steps:

S210: Process the first sequence and output a second sequence.

It should be noted that the “first sequence”, “processing” and “second sequence”, etc., are detailed in the above contents and will not be elaborated on here.

2) Some possible implementations

In combination with the above content, some possible implementation methods are described below. For other methods not described, please refer to the above content for details, and no further elaboration will be given.

In some possible implementations, processing the first sequence may include:

The first sequence is repeated or upsampled.

In some possible implementations, the first sequence may be an encoded bit sequence.

It should be noted that, in combination with the content in "② First Sequence" of the above "Implementation Method 1", the coding may include channel coding, or may include channel coding plus CRC coding.

In some possible implementations, the method may further include:

modulating the second sequence and outputting a third sequence;

The third sequence is precoded and a fourth sequence is output.

It should be noted that, in combination with the content of "④ Subsequent processing of the second sequence" in the above-mentioned "Implementation 1", the present application can modulate the second sequence output by the processing, thereby converting the second sequence into a "time domain" symbol or a modulation symbol, and then converting the "time domain" symbol or the modulation symbol into a "frequency domain" symbol through precoding, and mapping it to the subcarrier for frequency division multiplexing with other OFDM-based signals/channels.

In some possible implementations, the method may further include:

The second sequence is scrambled and a fifth sequence is output.

It should be noted that, in combination with the content of "② Subsequent processing of the second sequence" in the above-mentioned "Implementation Method 2", the present application can scramble the second sequence to ensure the randomization of the inter-cell interference as much as possible, thereby reducing the inter-cell interference.

In some possible implementations, the scrambling code sequence used for scrambling or the initial value of the scrambling code sequence generator may include a cell identifier.

It should be noted that, in combination with the content of "② Subsequent processing of the second sequence" in the above "Implementation Method 2", the fifth sequence output by the scrambling of the present application can carry a cell identifier, so that the wake-up signal can carry a cell identifier.

In some possible implementations, the following may also be included:

modulating the fifth sequence and outputting a sixth sequence;

The sixth sequence is precoded and a seventh sequence is output.

It should be noted that, in combination with the content of "② Subsequent processing of the second sequence" in the above-mentioned "Implementation Method 2", the present application can modulate the fifth sequence output by the scrambling, thereby converting the fifth sequence into a "time domain" symbol or a modulation symbol, and then converting the "time domain" symbol or the modulation symbol into a "frequency domain" symbol through precoding, and mapping it to the subcarrier for frequency division multiplexing with other OFDM-based signals/channels.

In some possible implementations, precoding may include discrete Fourier transform precoding or quasi-inverse based precoding.

It should be noted that, in combination with the contents of the above-mentioned "Implementation 1" and "Implementation 2", through DFT precoding or quasi-inverse-based precoding, the low-power receiver of the terminal device can detect OOK symbols through IDFT deprecoding or without deprecoding, thereby reducing the power consumption of the low-power receiver.

4. Another example of a wake-up signal processing method

1) Description

In combination with the contents of the above-mentioned "Implementation 3" and "Implementation 4", another wake-up signal processing method of the embodiment of the present application is described below. An example is given. It should be noted that the method can be applied to a network device, which can be a chip, a chip module or a communication module, etc., without any specific limitation.

As shown in FIG3 , it is a flowchart of another wake-up signal processing method according to an embodiment of the present application, which specifically includes the following steps:

S310. Modulate the first sequence and output an eighth sequence.

S320. Precode the eighth sequence and output a ninth sequence.

It should be noted that the “first sequence”, “modulation”, “precoding”, “eighth sequence” and “ninth sequence”, etc., are detailed in the above contents and will not be repeated here.

It can be seen that the present application converts the first sequence into a "time domain" symbol or a modulation symbol through modulation, and then converts the "time domain" symbol or the modulation symbol into a "frequency domain" symbol through precoding, and maps it to a subcarrier so as to perform frequency division multiplexing with other OFDM-based signals/channels. At the same time, the sequence length of the first sequence is increased through modulation and/or precoding, that is, the number of bits of the first sequence is increased, so as to realize the processing of the wake-up signal, so as to reduce the correlation/association between the first sequences as much as possible, and ensure the randomization of interference between cells.

2) Some possible implementations

It should be noted that, in combination with the content of the above-mentioned "Implementation Method 3", through DFT precoding or quasi-inverse-based precoding, the low-power receiver of the terminal device can detect OOK symbols through IDFT deprecoding or without deprecoding, thereby reducing the power consumption of the low-power receiver.

In some possible implementations, the method may further include:

The ninth sequence is scrambled and a tenth sequence is output.

It should be noted that, in combination with the content of "② Subsequent processing of the ninth sequence" in the above-mentioned "Implementation Method 4", the present application can scramble the ninth sequence to ensure the randomization of inter-cell interference as much as possible, thereby reducing inter-cell interference.

In some possible implementations, the scrambling code sequence used for scrambling or the initial value of the scrambling code sequence generator includes a cell identifier.

It should be noted that, in combination with the content of "② Subsequent processing of the ninth sequence" in the above-mentioned "Implementation Method 4", the fifth sequence output by the scrambling of the present application can carry a cell identifier, so that the wake-up signal can carry a cell identifier.

5. Another example of a wake-up signal processing method

1) Description

In combination with the content of the above-mentioned "Implementation 5", another wake-up signal processing method of the embodiment of the present application is introduced as an example below. It should be noted that the method can be applied to a network device. Among them, the network device can be a chip, a chip module or a communication module, etc., which is not specifically limited.

As shown in FIG. 4 , it is a flowchart of another wake-up signal processing method according to an embodiment of the present application, which specifically includes the following steps:

S410: Perform a first processing on the first sequence and output an eleventh sequence.

It should be noted that the “first sequence”, “first repetition”, “first upsampling” and “eleventh sequence”, etc., are detailed in the above contents and will not be described in detail.

2) Some possible implementations

In some possible implementations, the first processing includes a first iteration or a first up-take.

In some possible implementations, the method may further include:

The eleventh sequence is scrambled and a twelfth sequence is output.

It should be noted that, in combination with the content of "② Subsequent processing of the eleventh sequence" in the above-mentioned "Implementation 5", the present application can scramble the eleventh sequence to ensure the randomization of inter-cell interference as much as possible, thereby reducing inter-cell interference.

It should be noted that, in combination with the content of "② Subsequent processing of the eleventh sequence" in the above-mentioned "Implementation 5", the twelfth sequence output by the scrambling of the present application can carry a cell identifier, so that the wake-up signal can carry a cell identifier.

In some possible implementations, the method may further include:

The twelfth sequence is processed a second time, and the thirteenth sequence is output.

It should be noted that, in combination with the content of "② Subsequent processing of the eleventh sequence" in the above-mentioned "Implementation 5", the present application can increase the sequence length of the twelfth sequence through a second processing (which can be understood as further increasing the sequence length of the first sequence), that is, increasing the number of bits of the twelfth sequence, while minimizing the correlation/association between the first sequences, ensuring the randomization of interference between cells, and ensuring the de-interference of the low-power receiver of the terminal device.

In some possible implementations, the twelfth sequence is processed a second time, including:

The twelfth sequence is repeated a second time or upsampled a second time.

In some possible implementations, the method may further include:

modulating the thirteenth sequence and outputting a fourteenth sequence;

The fourteenth sequence is precoded and a fifteenth sequence is output.

It should be noted that, in combination with the content of "② Subsequent processing of the eleventh sequence" in the above-mentioned "Implementation 5", the present application can modulate the thirteenth sequence output by the second repetition or the second upsampling, thereby converting the thirteenth sequence into a "time domain" symbol or a modulation symbol, and then converting the "time domain" symbol or the modulation symbol into a "frequency domain" symbol through precoding, and mapping it to the subcarrier for frequency division multiplexing with other OFDM-based signals/channels.

In some possible implementations, precoding includes discrete Fourier transform precoding or quasi-inverse based precoding.

It should be noted that, in combination with the content of "② Subsequent processing of the eleventh sequence" in the above-mentioned "Implementation 5", the present application can, through DFT precoding or quasi-inverse-based precoding, enable the low-power receiver of the terminal device to detect OOK symbols through IDFT deprecoding or without deprecoding, thereby reducing the power consumption of the low-power receiver.

5. Example of a wake-up signal processing device

1. Description

The above mainly introduces the scheme of the embodiment of the present application from the perspective of the method side. It is understandable that in order to realize the above functions, the network device includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

The embodiment of the present application can divide the network device into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiment of the present application is schematic, which is only a logical function division, and there may be other division methods in actual implementation.

In the case of using an integrated unit, FIG5 is a block diagram of functional units of a wake-up signal processing device according to an embodiment of the present application. The wake-up signal processing device 500 includes: a processing unit 501 .

In some possible implementations, the processing unit 501 may be a module unit for processing signals, data, information, sequences, etc., and there is no specific limitation on this.

In some possible implementations, the processing unit 501 may be a processor or a controller, such as a baseband processor, a baseband chip, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processing unit may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

In some possible implementations, the wake-up signal processing apparatus 500 may further include a storage unit, which is used to store computer program codes or instructions executed by the wake-up signal processing apparatus 500. The storage unit may be a memory.

In some possible implementations, the wake-up signal processing device 500 may be a chip or a chip module.

In some possible implementations, the processing unit 501 may be integrated into other units.

For example, the processing unit 501 may be integrated in the communication unit.

It should be noted that the communication unit may be a communication interface, a transceiver, a transceiver circuit, etc.

In some possible implementations, the processing unit 501 is used to execute any step executed by the network device/chip/chip module/transmitter of the network device in the above method embodiment, which is described in detail below.

In specific implementation, the processing unit 501 is used to execute any step in the above method embodiment, and when executing actions such as sending, other units can be selectively called to complete corresponding operations.

The processing unit 501 is used to process the first sequence and output a second sequence.

It should be noted that the specific implementation of each operation in the embodiment shown in FIG. 5 can be found in the description of the method embodiment shown above, and will not be described in detail here.

2. Some possible implementation methods

Some possible implementations are described below, wherein some specific descriptions can be found above, and will not be repeated here.

In some possible implementations, in terms of processing the first sequence, the processing unit 501 may be configured to:

The first sequence is repeated or upsampled.

In some possible implementations, the wake-up signal processing apparatus 500 may further include a modulation and precoding unit, wherein the modulation and precoding unit is used for:

modulating the second sequence and outputting a third sequence;

The third sequence is precoded and a fourth sequence is output.

In some possible implementations, the wake-up signal processing apparatus 500 may further include a scrambling unit, where the scrambling unit is configured to:

The second sequence is scrambled and a fifth sequence is output.

It should be noted that, in combination with the content of "② Subsequent processing of the second sequence" in the above-mentioned "Implementation Method 2", the fifth sequence output by the scrambling of the present application can carry the cell identifier, so that the wake-up signal can carry the cell identifier.

modulating the fifth sequence and outputting a sixth sequence;

The sixth sequence is precoded and a seventh sequence is output.

It should be noted that, in combination with the contents of the above-mentioned "Implementation 1" and "Implementation 2", through DFT precoding or quasi-inverse-based precoding, the low-power receiver of the terminal device can obtain "time domain" symbols through IDFT deprecoding or without deprecoding, thereby simplifying the low-power receiver.

VI. Example of another wake-up signal processing device

In the case of using an integrated unit, FIG6 is a block diagram of functional units of another wake-up signal processing device according to an embodiment of the present application. The wake-up signal processing device 600 includes: a processing unit 601 .

In some possible implementations, the processing unit 601 may be a module unit for processing signals, data, information, etc., and there is no specific limitation on this.

In some possible implementations, the processing unit 601 may be a processor or a controller, such as a baseband processor, a baseband chip, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processing unit may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

In some possible implementations, the wake-up signal processing apparatus 600 may further include a storage unit, which is used to store computer program codes or instructions executed by the wake-up signal processing apparatus 600. The storage unit may be a memory.

In some possible implementations, the wake-up signal processing device 600 may be a chip or a chip module.

In some possible implementations, the processing unit 601 may be integrated into other units.

For example, the processing unit 601 may be integrated in a communication unit. It should be noted that the communication unit may be a communication interface, a transceiver, a transceiver circuit, and the like.

In some possible implementations, the processing unit 601 is used to execute any step executed by the network device/chip/chip module/transmitter of the network device, etc. in the above method embodiment. Detailed description is given below.

In specific implementation, the processing unit 601 is used to execute any step in the above method embodiment, and when executing actions such as sending, other units can be selectively called to complete corresponding operations.

The processing unit 601 is configured to modulate the first sequence to output an eighth sequence; and precode the eighth sequence to output a ninth sequence.

It should be noted that the specific implementation of each operation in the embodiment shown in FIG. 6 can be found in the description of the method embodiment shown above, and will not be described in detail here.

2. Some possible implementation methods

In some possible implementations, the wake-up signal processing apparatus 600 may further include a scrambling unit, where the scrambling unit is configured to:

The ninth sequence is scrambled and a tenth sequence is output.

VII. Example of another wake-up signal processing device

In the case of using an integrated unit, FIG7 is a block diagram of functional units of another wake-up signal processing device according to an embodiment of the present application. The wake-up signal processing device 700 includes: a processing unit 701 .

In some possible implementations, the processing unit 701 may be a module unit for processing signals, data, information, etc., and there is no specific limitation on this.

In some possible implementations, the processing unit 701 may be a processor or a controller, such as a baseband processor, a baseband chip, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processing unit may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

In some possible implementations, the wake-up signal processing device 700 may further include a storage unit for storing computer program codes or instructions executed by the sequence processing device 700. The storage unit may be a memory.

In some possible implementations, the wake-up signal processing device 700 may be a chip or a chip module.

In some possible implementations, the processing unit 701 may be integrated into other units.

For example, the processing unit 701 may be integrated in a communication unit. It should be noted that the communication unit may be a communication interface, a transceiver, a transceiver circuit, and the like.

In some possible implementations, the processing unit 701 is used to execute any step executed by the network device/chip/chip module/transmitter of the network device in the above method embodiment, which is described in detail below.

In specific implementation, the processing unit 701 is used to execute any step in the above method embodiment, and when executing actions such as sending, other units can be selectively called to complete corresponding operations.

The processing unit 701 is configured to perform a first processing on the first sequence and output an eleventh sequence.

It should be noted that the specific implementation of each operation in the embodiment shown in FIG. 7 can be found in the description of the method embodiment shown above, and will not be described in detail here.

2. Some possible implementation methods

In some possible implementations, in terms of performing the first processing on the first sequence, the processing unit 701 may be configured to:

The first sequence is repeated for the first time or upsampled for the first time.

In some possible implementations, the wake-up signal processing apparatus 700 may further include a scrambling unit, where the scrambling unit is configured to:

The eleventh sequence is scrambled and a twelfth sequence is output.

In some possible implementations, the processing unit 701 may also be used to:

It should be noted that, in combination with the content of "② Subsequent processing of the eleventh sequence" in the above-mentioned "Implementation 5", the present application can increase the sequence length of the twelfth sequence through a second repetition or a second upsampling (which can be understood as further increasing the sequence length of the first sequence), that is, increasing the number of bits of the twelfth sequence, while minimizing the correlation/association between the first sequences, ensuring the randomization of interference between cells, and ensuring the de-interference of the low-power receiver of the terminal device.

In some possible implementations, in terms of performing the second processing on the twelfth sequence, the processing unit 701 may be configured to:

The twelfth sequence is repeated a second time or upsampled a second time.

In some possible implementations, the wake-up signal processing apparatus 700 may further include a modulation and precoding unit, where the modulation and precoding unit is configured to:

modulating the thirteenth sequence and outputting a fourteenth sequence;

The fourteenth sequence is precoded and a fifteenth sequence is output.

8. Example of a network device

Please refer to FIG8 , which is a schematic diagram of the structure of a network device according to an embodiment of the present application. The network device 800 may include a processor 810 , a memory 820 , and a communication bus for connecting the processor 810 and the memory 820 .

In some possible implementations, the memory 820 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or portable read-only memory (CD-ROM), and the memory 820 is used to store the program code executed by the network device 800 and the data transmitted.

In some possible implementations, the network device 800 also includes a communication interface for receiving and sending data.

In some possible implementations, the processor 810 may be one or more central processing units (CPUs). When the processor 810 is a central processing unit (CPU), the central processing unit (CPU) may be a single-core central processing unit (CPU) or a multi-core central processing unit (CPU).

In some possible implementations, the processor 810 may be a baseband chip, a chip, a central processing unit (CPU), a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof.

In a specific implementation, the processor 810 in the network device 800 is used to execute the computer program or instruction 821 stored in the memory 820 to perform the following operations:

The first sequence is processed and a second sequence is output.

It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment shown above, and the network device 800 can be used to execute the above method embodiment of the present application, which will not be repeated here.

9. Another example of network equipment

Please refer to FIG9 , which is a schematic diagram of the structure of another network device according to an embodiment of the present application. The network device 900 may include a processor 910 , a memory 920 , and a communication bus for connecting the processor 910 and the memory 920 .

In some possible implementations, the memory 920 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or portable read-only memory (CD-ROM), and is used to store the program code executed by the network device 900 and the data transmitted.

In some possible implementations, the network device 900 also includes a communication interface for receiving and sending data.

In some possible implementations, the processor 910 may be one or more central processing units (CPUs). When the processor 910 is a central processing unit (CPU), the central processing unit (CPU) may be a single-core central processing unit (CPU) or a multi-core central processing unit (CPU).

In some possible implementations, the processor 910 may be a baseband chip, a chip, a central processing unit (CPU), a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof.

In a specific implementation, the processor 910 in the network device 900 is used to execute the computer program or instruction 921 stored in the memory 920 to perform the following operations:

modulating the first sequence and outputting an eighth sequence;

The eighth sequence is precoded and a ninth sequence is output.

It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment shown above, and the network device 900 can be used to execute the above method embodiment of the present application, which will not be repeated here.

10. Another example of network equipment

Please refer to FIG10 , which is a schematic diagram of the structure of another network device according to an embodiment of the present application. The network device 1000 may include a processor 1010 , a memory 1020 , and a communication bus for connecting the processor 1010 and the memory 1020 .

In some possible implementations, the memory 1020 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or portable read-only memory (CD-ROM), and the memory 1020 is used to store the program code executed by the network device 1000 and the data transmitted.

In some possible implementations, the network device 1000 further includes a communication interface for receiving and sending data.

In some possible implementations, the processor 1010 may be one or more central processing units (CPUs). When the processor 1010 is a central processing unit (CPU), the central processing unit (CPU) may be a single-core central processing unit (CPU) or a multi-core central processing unit (CPU).

In some possible implementations, the processor 1010 may be a baseband chip, a chip, a central processing unit (CPU), a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof.

In a specific implementation, the processor 1010 in the network device 1000 is used to execute the computer program or instruction 1021 stored in the memory 1020 to perform the following operations:

It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment shown above, and the network device 1000 can be used to execute the above method embodiment of the present application, which will not be repeated here.

11. Other related examples

In some possible implementations, the above method embodiments may be applied to or in a network device. That is, the execution subject of the above method embodiments may be a network device, a chip, a chip module, a module, or a transmitter of a network device, etc., without specific limitation.

An embodiment of the present application also provides a chip, including a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps described in the above method embodiment.

An embodiment of the present application also provides a chip module, including a transceiver component and a chip, the chip including a processor, a memory and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps described in the above method embodiment.

An embodiment of the present application also provides a computer-readable storage medium storing a computer program or instructions, which implements the steps described in the above method embodiment when executed.

The embodiment of the present application also provides a computer program product, including a computer program or instructions, which implement the steps described in the above method embodiment when executed.

An embodiment of the present application also provides a communication system, including the above-mentioned network device and terminal device.

It should be noted that, for the above-mentioned various embodiments, for the sake of simple description, they are all expressed as a series of action combinations. Those skilled in the art should be aware that the present application is not limited by the described order of actions, because some steps in the embodiments of the present application can be performed in other orders or simultaneously. In addition, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions, steps, modules or units involved are not necessarily required by the embodiments of the present application.

In the above embodiments, the embodiments of the present application have different focuses on the description of each embodiment. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

The steps of the method or algorithm described in the embodiments of the present application can be implemented in hardware or by executing software instructions by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in RAM, flash memory, ROM, EPROM, electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disks, mobile hard disks, read-only compact disks (CD-ROMs) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a terminal device or a management device. Of course, the processor and the storage medium can also exist in a terminal device or a management device as discrete components.

Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiments of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

The modules/units included in the devices and products described in the above embodiments may be software modules/units or hardware modules/units, or may be partially software modules/units and partially hardware modules/units. For example, for the devices and products applied to or integrated in the chip, the modules/units included therein may all be implemented in the form of hardware such as circuits, or at least some of the modules/units may be implemented in the form of software programs, which run on the processor integrated inside the chip, and the remaining (if any) modules/units may be implemented in the form of hardware such as circuits; for the devices and products applied to or integrated in the chip module, the modules/units included therein may all be implemented in the form of hardware such as circuits, and different modules/units may be located in the same component (such as a chip, circuit module, etc.) or in different components of the chip module, or at least some of the modules/units may be implemented in the form of software programs. The software programs run on the processor integrated inside the chip, and the remaining (if any) modules/units may be implemented in the form of hardware such as circuits. It is implemented in the form of a software program, which runs on a processor integrated inside the chip module, and the remaining (if any) modules/units can be implemented in hardware such as circuits; for various devices and products applied to or integrated in the terminal equipment, the various modules/units contained therein can be implemented in hardware such as circuits, and different modules/units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal equipment, or, at least some modules/units can be implemented in the form of a software program, which runs on a processor integrated inside the terminal equipment, and the remaining (if any) modules/units can be implemented in hardware such as circuits.

The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above description is only the specific implementation method of the embodiments of the present application and is not intended to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

A wake-up signal processing method, characterized by comprising:

The first sequence is processed to output a second sequence, wherein the length of the second sequence is greater than the length of the first sequence.
The method according to claim 1, characterized in that the processing of the first sequence comprises:

The first sequence is repeated or upsampled.
The method according to claim 1, characterized in that the first sequence is an encoded bit sequence.
The method according to claim 1, further comprising:

modulating the second sequence to output a third sequence;

The third sequence is precoded to output a fourth sequence.
The method according to claim 1, further comprising:

The second sequence is scrambled to output a fifth sequence.
The method according to claim 5 is characterized in that the scrambling code sequence used for scrambling or the initial value of the scrambling code sequence generator includes a cell identifier.
The method according to claim 5, further comprising:

modulating the fifth sequence to output a sixth sequence;

The sixth sequence is precoded to output a seventh sequence.
The method according to claim 4 or 7 is characterized in that the precoding includes discrete Fourier transform precoding or quasi-inverse based precoding.
A wake-up signal processing method, characterized by comprising:

modulating the first sequence and outputting an eighth sequence;

The eighth sequence is precoded to output a ninth sequence.
The method according to claim 9, characterized in that the first sequence is an encoded bit sequence.
The method according to claim 9 is characterized in that the precoding includes discrete Fourier transform precoding or quasi-inverse based precoding.
The method according to any one of claims 9 to 11, further comprising:

The ninth sequence is scrambled to output a tenth sequence.
The method according to claim 12 is characterized in that the scrambling code sequence or the initial value of the scrambling code sequence generator used for scrambling includes a cell identifier.
A wake-up signal processing method, characterized by comprising:

The first sequence is processed for the first time to output an eleventh sequence, wherein the sequence length of the eleventh sequence is greater than the sequence length of the first sequence.
The method according to claim 14, characterized in that the first processing of the first sequence comprises:

The first sequence is repeated for the first time or upsampled for the first time.
The method according to claim 14, characterized in that the first sequence is an encoded bit sequence.
The method according to claim 14, further comprising:

The eleventh sequence is scrambled to output a twelfth sequence.
The method according to claim 17 is characterized in that the scrambling code sequence used for scrambling or the initial value of the scrambling code sequence generator includes a cell identifier.
The method according to claim 17, further comprising:

The twelfth sequence is processed for a second time to output a thirteenth sequence, wherein a sequence length of the thirteenth sequence is greater than a sequence length of the twelfth sequence.
The method according to claim 19, characterized in that the second processing of the twelfth sequence comprises:

The twelfth sequence is repeated a second time or up-sampled a second time.
The method according to claim 19, further comprising:

modulating the thirteenth sequence and outputting a fourteenth sequence;

The fourteenth sequence is precoded to output a fifteenth sequence.
The method according to claim 21 is characterized in that the precoding includes discrete Fourier transform precoding or quasi-inverse based precoding.
A wake-up signal processing device, comprising:

The processing unit is used to process the first sequence and output a second sequence.
A wake-up signal processing device, comprising:

The processing unit is used to modulate the first sequence to output an eighth sequence; and precode the eighth sequence to output a ninth sequence.
A wake-up signal processing device, comprising:

The processing unit is used to perform a first processing on the first sequence and output an eleventh sequence.
A network device comprises a processor, a memory and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps of the method described in any one of claims 1-8, 9-13, and 14-22.
A chip comprising a processor and a communication interface, characterized in that the processor executes the steps of the method described in any one of claims 1-8, 9-13, and 14-22.
A computer-readable storage medium, characterized in that it stores a computer program or instruction, which, when executed, implements the steps of the method described in any one of claims 1-8, 9-13, and 14-22.