WO2020199021A1

WO2020199021A1 - Wake-up signal sending method and apparatus

Info

Publication number: WO2020199021A1
Application number: PCT/CN2019/080643
Authority: WO
Inventors: 米翔; 罗之虎; 铁晓磊; 金哲
Original assignee: 华为技术有限公司
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-10-08
Also published as: CN113366890A; CN113366890B

Abstract

A wake-up signal sending method and apparatus, for use in solving the problem in the art that there is a great complexity and large power consumption for a terminal device to blindly detect a wake-up signal. The method and apparatus provided in the present application can be applicable to Internet of Things, such as MTC, IoT, LTE-M, M2M, D2D, and relay. A first device may generate a wake-up signal sequence on the basis of a ZC sequence and a GOLD sequence, the length of the GOLD sequence being 264*L*(N-1)+264*M, wherein N is a sequence index corresponding to a group to which a second device belongs, L is the number of sub-frames corresponding to a maximum duration of the wake-up signal sequence, and M is the number of sub-frames corresponding to an actual duration of the wake-up signal sequence; after generating the wake-up signal sequence, the first device sends the wake-up signal sequence to the second device; after receiving the wake-up signal sequence, the second device generates a local sequence on the basis of the ZC sequence and the GOLD sequence, the length of the GOLD sequence being 264*L*(N-1)+264*K, wherein K is the number of sub-frames corresponding to a candidate duration of the wake-up signal sequence determined by the second device.

Description

Method and device for sending wake-up signal

Technical field

This application relates to the field of communication technology, and in particular to a method and device for sending a wake-up signal.

Background technique

At present, in some communication systems, such as the narrowband internet of things (NB-IoT), the 5th generation (5G) network or the new generation of radio access (NR) systems, terminals have There are two states, one is the connected state, which indicates that the terminal has established a connection with the network device and can communicate directly; the other is the idle state or sleep state, where the terminal cannot directly communicate with the network device. In order to ensure that the network device can find the terminal in the idle state in time, the network device will send a paging signal to the terminal by means of paging to instruct the terminal to switch from the idle state to the connected state in order to communicate with the network device; accordingly, In order to receive the paging signal, the terminal will wake up periodically to monitor the Physical Downlink Control Channel (PDCCH) to receive the paging signal.

In practical applications, the probability of a network device paging a terminal is generally very low. In order to reduce the power consumption of the terminal to monitor the PDCCH, the network device can send a wake-up signal (WUS) to the terminal in advance, and the terminal will monitor the PDCCH only after receiving the wake-up signal.

In the existing solution, when the network device generates the wake-up signal, the network device generates the wake-up signal based on the ZC sequence and the GOLD sequence. The Gold sequence is generated according to the number of subframes actually occupied by the wake-up signal. Accordingly, the terminal is monitoring the wake-up The terminal does not know the number of sub-frames actually occupied by the wake-up signal. During the blind detection, the terminal first generates a local based on the number of sub-frames that the wake-up signal may occupy based on the ZC sequence and the GOLD sequence. Sequence, and then perform sequence detection with the received wake-up signal, that is, the terminal will sequentially generate a local sequence based on the number of possible sub-frames occupied by different wake-up signals, until the correlation value between the local sequence and the wake-up signal exceeds the threshold, it is considered to be detected Success, confirm that the wake-up signal is received.

In this process, when the terminal performs blind detection, it needs to generate a local sequence for each possible number of subframes occupied, which increases the complexity and power consumption of the blind detection of the terminal.

Summary of the invention

The present application provides a wake-up signal sending method and device, which are used to solve the problems of high complexity and high power consumption of terminal equipment blindly detecting the wake-up signal in the prior art.

In the first aspect, an embodiment of the present application provides a wake-up signal sending method. The method includes: the first device can generate a wake-up signal sequence based on the ZC sequence and the GOLD sequence, and the length of the GOLD sequence is 264*L*(N-1) +264*M, N is the sequence index corresponding to the group to which the second device belongs, L is the number of subframes corresponding to the maximum duration of the wake-up signal sequence, L is a positive integer, and M is the sub-frame corresponding to the actual duration of the wake-up signal sequence Frame number, M is a positive integer and less than or equal to L, and N is a positive integer greater than 1. After the wake-up signal sequence is generated, the first device sends the wake-up signal sequence to the second device.

Through the above method, since the first device uses the GOLD sequence with a length of 264*L*(N-1)+264*M when generating the wake-up signal sequence, the second device as the receiving end also generates the local sequence. Using the same length of GOLD sequence, for each possible M value, there will be the same part between the adopted GOLD sequence, so that the local sequence also has the same part. When doing sequence detection, you can continue to use the sequence detection. For the same part of the detection result, only the different parts of the local sequence can be sequenced, which can effectively reduce the complexity of blind detection, thereby reducing power consumption.

In a possible design, when the first device generates the wake-up signal sequence based on the ZC sequence and the GOLD sequence, it can be intercepted and then generated. Exemplarily, the first device can first intercept the 264*L* in the GOLD sequence. (N-1)+1 bits to 264*L*(N-1)+264*M bits constitute the target sequence; after that, a wake-up signal sequence is generated based on the ZC sequence and the target sequence.

Through the above method, the effective part can be intercepted first, the amount of calculation can be reduced, the wake-up signal can be generated faster, and the power consumption can be further reduced.

In a possible design, when the first device generates the wake-up signal sequence based on the ZC sequence and the target sequence, it can generate the wake-up signal sequence based on the ZC sequence and the complex number sequence converted from the target sequence, for example, by performing sequence dot multiplication. Wake-up signal sequence.

Through the above method, the first device can easily generate a wake-up signal sequence through operations between sequences.

In a possible design, when the first device generates the wake-up signal sequence based on the ZC sequence and the GOLD sequence, it can generate the sequence first and then intercept the effective part. For example, the first device can be based on the ZC sequence and the GOLD sequence. Generate a candidate wake-up signal sequence, the length of the candidate wake-up signal sequence is 132*L*(N-1)+132*M; then, intercept the 132*L*(N-1)+1 position of the candidate wake-up signal sequence to the first 132*L*(N-1)+132*M bits are used as the wake-up signal sequence.

Through the above method, by first generating the sequence and then intercepting, the effective part can be directly intercepted at last, which is more flexible and can be applied to different scenarios.

In a possible design, when the first device generates a candidate wake-up signal sequence based on the ZC sequence and the GOLD sequence, it can generate the candidate wake-up signal sequence based on the ZC sequence and the complex number sequence converted from the GOLD sequence, such as the sequence point multiplication Way to generate candidate wake-up signal sequence.

Through the above method, the first device can easily generate candidate wake-up signal sequences through operations between sequences.

In a possible design, the wake-up signal sequence satisfies the following formula:

Among them, w _N (m) is the wake-up signal sequence, x=0,1,...,M-1, m=0,1,...,131,

Is the ZC sequence,

among them

Is the cell identity, n=m mod132,

Is the GOLD sequence, N is the sequence index corresponding to the group to which the second device belongs, n _f is the frame number of the first frame where the first paging opportunity PO corresponding to the wake-up signal sequence is located, and n _s is the first frame corresponding to the wake-up signal sequence The slot number of the first slot where a PO is located.

Through the above method, the wake-up signal sequence satisfies a certain formula, and the wake-up signal sequence can be directly generated by the formula, which can make the generation method more convenient.

In a possible design, each second device of the plurality of second devices corresponding to the first device belongs to at least one group, each group has a group index, and each group index corresponds to a sequence index Before the first device generates the wake-up signal sequence based on the ZC sequence and the GOLD sequence, it may first determine the sequence index N corresponding to the group to which the second device belongs. Exemplarily, the first device may be based on one of the group index and the sequence index of the group. According to the corresponding relationship between the second device, the sequence index N corresponding to the group to which the second device belongs is determined according to the group index of the group to which the second device belongs.

Through the above method, through the correspondence between the group index and the sequence index of the group, the sequence index corresponding to the group to which the second device belongs can be determined effectively and conveniently, and the wake-up signal sequence can be generated more quickly.

In the second aspect, an embodiment of the present application provides a wake-up signal sending method. The method includes: a second device receives a wake-up signal sequence from a first device; for sequence detection, the second device can generate a local signal based on the ZC sequence and the GOLD sequence. Sequence, the length of the GOLD sequence is 264*L*(N-1)+264*K, N is the sequence index corresponding to the group to which the second device belongs, L is the number of subframes corresponding to the maximum duration of the wake-up signal sequence, L Is a positive integer, K is the number of subframes corresponding to the candidate duration of the wake-up signal sequence determined by the second device, that is, the number of subframes corresponding to the possible duration of the wake-up signal sequence determined by the second device, and is a possibility of M Take the value, K is a positive integer and less than or equal to L, and N is a positive integer greater than 1. After that, the second device performs sequence detection on the wake-up signal sequence based on the local sequence.

Through the above method, the second device will use the GOLD sequence of 264*L*(N-1)+264*K in the process of sequence detection when generating the local sequence. For each K value, between the adopted GOLD sequence There will be the same part, so that the local sequence also has the same part. When doing sequence detection, you can continue to use the same part of the sequence detection result, and only do the sequence detection on the different parts of the local sequence, which can be effective The complexity of blind inspection is reduced, thereby reducing power consumption.

In a possible design, when the second device generates the local sequence based on the ZC sequence and the GOLD sequence, it can adopt the method of first interception and then generation. Exemplarily, the second device can intercept the 264*L*(N -1) The +1 bit to the 264*L*(N-1)+264*K bit constitute the target sequence; then, the wake-up signal sequence is generated based on the ZC sequence and the target sequence.

Through the above method, the effective part can be intercepted first, the amount of calculation can be reduced, the local sequence can be generated relatively quickly, and then the sequence detection can be performed to further reduce power consumption.

In a possible design, when the second device generates a local sequence based on the ZC sequence and the target sequence, it can generate the local sequence based on the ZC sequence and the complex number sequence converted from the target sequence, for example, the local sequence is generated by the sequence dot product .

Through the above method, the second device can easily generate a local sequence through operations between sequences.

In a possible design, when the second device generates a local sequence based on the ZC sequence and the GOLD sequence, it can generate a candidate sequence based on the ZC sequence and the GOLD sequence, and the length of the candidate sequence is 132*L*(N-1)+132* K; After that, intercept the 132*L*(N-1)+1 position to the 132*L*(N-1)+132*K position of the candidate sequence as the local sequence.

In a possible design, when the second device generates a candidate sequence based on the ZC sequence and the GOLD sequence, the second device can generate the candidate sequence according to the ZC sequence and the complex sequence converted from the GOLD sequence, for example, the sequence point multiplication method Generate candidate sequences.

Through the above method, the first device can easily generate candidate sequences through operations between sequences.

In a possible design, the local sequence satisfies the following formula, including:

Among them, w _N (m) is the local sequence, x=0,1,...,K-1, m=0,1,...,131,

Is the ZC sequence,

among them

Is the cell identity, n=m mod 132,

Through the above method, the local sequence satisfies a certain formula, and the formula can be used to directly generate the local sequence, which can make the generation method more convenient and simple, thereby improving the efficiency of sequence detection.

In a possible design, the second device can determine the correlation value between the local sequence and the wake-up signal sequence when performing sequence detection on the wake-up signal sequence based on the local sequence, and determine that the detection is successful when the correlation value exceeds the threshold; When the correlation value does not exceed the threshold, it is determined that the wake-up signal sequence is not detected, and it can be considered that the first device has not sent the wake-up signal sequence with the number of subframes corresponding to the duration of K.

Through the above method, by determining the correlation value of the two sequences, it is convenient to determine whether the wake-up signal sequence is detected.

In a possible design, the first device may correspond to multiple second devices, each second device of the multiple second devices belongs to at least one group, and each group has a group index, and each group The index corresponds to a sequence index. Before the second device generates a local sequence based on the ZC sequence and the GOLD sequence, it may first determine the sequence index N corresponding to the group to which the second device belongs. For example, the second device may be based on the group of the group The corresponding relationship between the index and the sequence index determines the sequence index N corresponding to the group to which the second device belongs according to the group index of the group to which the second device belongs.

Through the above method, through the correspondence between the group index and the sequence index of the group, the sequence index corresponding to the group to which the second device belongs can be determined effectively and conveniently, and the local sequence can be generated more quickly, which further improves the sequence detection s efficiency.

In the third aspect, the embodiments of the present application also provide a communication device. The communication device is applied to the first device. For beneficial effects, refer to the description of the first aspect and will not be repeated here. The device has the function of realizing the behavior in the method example of the first aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. In a possible design, the structure of the device includes a processing unit and a sending unit, and these units can perform the corresponding functions in the method example of the first aspect described above. For details, refer to the detailed description in the method example, which will not be repeated here.

In the fourth aspect, an embodiment of the present application also provides a communication device, which is applied to a second device, and the beneficial effects can be referred to the description of the second aspect and will not be repeated here. The device has the function of realizing the behavior in the method example of the second aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. In a possible design, the structure of the device includes a receiving unit and a processing unit. These units can perform the corresponding functions in the method example of the second aspect. For details, please refer to the detailed description in the method example, which is not repeated here.

In the fifth aspect, the embodiments of the present application also provide a communication device, which is applied to the first device, and the beneficial effects can be referred to the description of the first aspect and will not be repeated here. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to perform the corresponding functions in the above-mentioned method in the first aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device. The structure of the communication device also includes a communication interface for communicating with other devices.

In the sixth aspect, an embodiment of the present application also provides a communication device, which is applied to a second device, and the beneficial effects can be referred to the description of the second aspect and will not be repeated here. The structure of the communication device includes a processor and a memory, and the processor is configured to support the terminal to perform the corresponding function in the above-mentioned second aspect method. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device. The structure of the communication device also includes a transceiver for communicating with other devices.

In a seventh aspect, the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the methods of the foregoing aspects.

In an eighth aspect, the present application also provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the methods of the above aspects.

In a ninth aspect, the present application also provides a computer chip, which is connected to a memory, and the chip is used to read and execute a software program stored in the memory, and execute the methods of the foregoing aspects.

Description of the drawings

Figure 1A is a schematic diagram of the location of a paging opportunity of a terminal device;

Figure 1B is a schematic diagram of WUS sequence generation in IB deployment mode;

Figure 1C is a schematic diagram of the WUS sequence position in GB deployment mode and SA deployment mode;

FIG. 1D is a schematic diagram of positions of intercepted Gold sequences corresponding to different groups;

Figure 1E is a schematic diagram of the positions of intercepted Gold sequences corresponding to different M values;

FIG. 2 is an architecture diagram of a communication system provided by an embodiment of this application;

FIG. 3 is a schematic diagram of a method for sending a wake-up signal according to an embodiment of the application;

4 is a schematic diagram of positions of intercepted Gold sequences in the reference GOLD sequences corresponding to different groups provided by an embodiment of the application;

FIG. 5 is a schematic diagram of the positions of the target sequences corresponding to different K values in the reference GOLD sequence provided by the embodiments of the application;

FIG. 6 is a structural diagram of a communication device provided by an embodiment of this application;

FIG. 7 is a structural diagram of a communication device provided by an embodiment of this application;

FIG. 8 is a structural diagram of a communication device provided by an embodiment of this application;

FIG. 9 is a structural diagram of a communication device provided by an embodiment of the application.

detailed description

The present application provides a method and device for sending a wake-up signal to solve the problem that the terminal device blindly detects the wake-up signal in the prior art, and the power consumption is large. Among them, the method and device described in the present application are based on the same inventive concept. Since the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated. The methods and devices provided in the embodiments of this application do not limit the application scenarios. They can be applied to the Internet of Things as an example, such as machine-to-machine/machine-type communications (M2M/MTC), Internet of things (IoT), long term evolution-machine to machine (LTE-M), machine to machine (M2M), device-to-device (device-to-device, D2D), relay, etc. "

1) Terminal devices, including devices that provide users with voice and/or data connectivity, such as handheld devices with wireless connection functions, or processing devices connected to wireless modems. The terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communication ( machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station) , Remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device) etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, and computer-built mobile devices. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, etc.) PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories.

The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).

2) Network equipment, including, for example, access network (AN) equipment, such as a base station (e.g., access point), which can refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network . The base station can be used to convert the received air frame and Internet Protocol (IP) packets to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network. The network equipment can also coordinate the attribute management of the air interface. For example, the network equipment may include the LTE system or the evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the long term evolution-advanced (LTE-A), or may also include the fifth-generation mobile Communication technology (the 5 ^th generation, 5G) new radio (NR) system in the next generation node B (next generation node B, gNB) or can also include cloud access network (cloud radio access network, Cloud RAN) The centralized unit (centralized unit, CU) and distributed unit (distributed unit, DU) in the system may also include a relay device, which is not limited in the embodiment of the present application.

3) PDCCH, a downlink control channel sent by a network device (such as a base station) to a terminal device, is used for at least one or more of the following functions: (1) Send downlink scheduling information to the terminal device, and downlink scheduling information is also It is called downlink assignment information, and the downlink scheduling information includes PDSCH transmission parameters so that the terminal device can receive the PDSCH. Among them, PDSCH is used to carry downlink data sent by network equipment to terminal equipment; (2) Uplink scheduling information is sent to terminal equipment. Uplink scheduling information is also called uplink grant information. The uplink scheduling information includes PUSCH transmission Parameters so that the terminal device can send PUSCH to the network device. The PUSCH is used to carry the uplink data sent by the terminal device to the network device; (3) Send a periodic channel quality indicator (CQI) report request; (4) Send an uplink power control command, the uplink power control command Used for terminal equipment to determine the transmit power of the uplink channel; (5) Carry hybrid automatic repeat request (HARQ) related information; (6) Carry radio network temporary identifier (RNTI) information, The RNTI information may be implicitly included in a cyclic redundancy check (cyclic redundancy check, CRC). The RNTI information is used by the terminal device to determine whether the PDCCH sent by the network device is for itself.

Among them, the information carried by the PDCCH can be called downlink control information (DCI). One PDCCH carries only one format of DCI scrambled by RNTI, and the information carried by the DCI can be based on the DCI format (format ), and/or higher layer signaling (RRC signaling) configuration. DCI can indicate cell-level information, such as instructing terminal equipment to use system information, radio network temporary identifier (RNTI, SI-RNTI), paging RNTI (paging RNTI, P-RNTI), or random access RNTI (radom access RNTI, RA-RNTI) scrambled downlink control information, DCI can also indicate terminal equipment level information, such as instructing terminal equipment to use cell RNTI (cell RNTI, C-RNTI), configure scheduling RNTI (configured scheduling RNTI) , CS-RNTI) or semi-persistent CSI RNTI (semi-persistent CSI RNTI, SP CSI-RNTI) scrambled downlink control information.

The network equipment can send multiple PDCCHs on one control resource set, and the multiple PDCCHs can carry the same or different control information, including scheduling information of downlink data or scheduling information of uplink data, that is, the scheduling information can schedule terminal equipment It can also schedule the uplink data of the terminal equipment. In addition, a network device can also schedule multiple terminal devices in one control resource set, and each scheduling information is transmitted on an independent PDCCH.

A PDCCH is sent in the form of a control-channel element (CCE), which can also be called a time-frequency resource of a PDCCH including one or two CCEs. Among them, one CCE is composed of 6 consecutive sub-carriers on one sub-frame.

4) Candidate PDCCH (PDCCH candidate), the terminal device needs to perform blind detection on the configured aggregation level and the candidate PDCCH corresponding to the aggregation level to obtain downlink control information. Network equipment can be configured with aggregation level sets. For example, an aggregation level set {1,2} can be configured, a group of corresponding number of CCEs corresponds to a candidate PDCCH, the network device can send a PDCCH through one of the candidate PDCCHs, and correspondingly, the terminal device has the

aggregation level

1 and 2. Blind check of the PDCCH to confirm whether there is a PDCCH sent to itself.

5) PDCCH search space (PDCCH search space set, PDCCHSS set), the candidate PDCCH set that the terminal device needs to monitor is called the PDCCH search space. The candidate PDCCH set corresponding to a certain aggregation level can be referred to as the PDCCH search space under the aggregation level. A PDCCH search space is configured with its associated control resource set, PDCCH monitoring period, aggregation level, and the number of candidate PDCCHs corresponding to the aggregation level.

The PDCCH search space is divided into a common PDCCH search space (common search space set, CSS set) and a UE-specific PDCCH search space (UE-specific search space set, USS set). CSS set is used to transmit control information related to paging, RA Response (radom access response), and broadcast control channel (BCCH). The control information is mainly cell-level public information. This information is the same for all UEs. USS set is used to transmit control information related to downlink shared channel (downlink shared channel(s), DL-SCH) and uplink shared channel (uplink shared channel(s), UL-SCH), etc. The control information is mainly UE-level information.

In the NB-IoT system, a terminal device needs to monitor an NPDCCH candidate set to obtain DCI. The NPDCCH candidate set is called an NPDCCH search space (search space, SS), and the resources of the search space are periodically distributed. The network device can indicate the search space period (that is, the length of the search space period in the time domain) and the search space in each period through system messages or radio resource control (RRC) signaling to the terminal device The terminal device blindly detects the NPDCCH in the search space according to the instructions of the network device.

6) Paging, discontinuous reception (DRX) cycle, paging occasion (PO), for terminal equipment in idle state, when network equipment needs to send business data to terminal equipment or network equipment needs terminal equipment When reporting service data, the network device can notify the terminal device by means of paging, that is, instruct the terminal device to switch from the idle state to the connected state through a paging message. After receiving the paging message, the terminal device can enter the connected state under the instruction of the paging message to send or receive service data.

Generally, the terminal device in the idle state will wake up periodically to monitor the paging message to see if there is a paging message indicating that it enters the connected state. As shown in Figure 1A, the period during which the terminal device wakes up is called the DRX period. The DRX cycle can be notified to the terminal device by the network device through a system message. The location where the terminal device wakes up is called paging opportunity (PO). The terminal device can monitor the PDCCH at the PO to monitor the paging message.

The PO indicates the starting position of the terminal device to monitor the PDCCH. The terminal device can determine the PDCCH search space according to the PO, and detect the PDCCH in the form of blind detection in the PDCCH search space.

If the terminal device detects the PDCCH, the terminal device can receive the physical downlink shared channel (PDSCH) according to the indication information carried on the detected PDCCH, and the PDSCH carries a paging message.

7) Wake-up signal (WUS). In some wireless communication networks, such as IoT systems, the probability of paging the UE is generally very low. This makes most of the POs may be empty, that is, the network device does not send the corresponding PDCCH at the PO. However, the terminal still needs to monitor the PDCCH at each PO, because the terminal only knows whether the network device sends the PDCCH after the blind check is completed. This will waste the power consumption of the terminal. In order to save the power consumption of the terminal, a wake-up signal is introduced; the network device uses WUS to indicate whether the terminal needs to wake up and detect the PDCCH at the PO.

If the PDCCH needs to be sent on the PO, for example, when the network device needs to page the terminal device, or the system message changes, the network device will send WUS before the PO; if the PDCCH does not need to be sent on the PO, the network device will not Send WUS before PO.

For the terminal device, the wake-up signal will be detected before the PO. If WUS is detected, the subsequent PDCCH will be detected; if WUS is not detected, the subsequent PDCCH will not be detected.

It should be noted that the wake-up signal sent by the network device is usually in the form of a sequence, so the wake-up signal may also be called a wake-up signal sequence.

8) In the description of this application, words such as "first", "second" and "third" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating Or to imply the order, the terms "system" and "network" in the embodiments of the present invention may be used interchangeably. "Multiple" means two or more.

"And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

The following takes WUS introduced in the NB-IoT system as an example to describe the way in which network equipment generates WUS and terminal equipment detects WUS.

Before that, two parameters need to be explained. They are the number of subframes corresponding to the maximum duration of the WUS sequence (WUSmaximum duration)L and the number of subframes corresponding to the actual duration of the WUS sequence (WUSactual duration)M. The relationship between L and M is, M<=L.

Generally, L is configured by a network device, and the network device can notify the terminal device through a system message, that is, the terminal device can learn L, but not M; for the terminal device, the actual duration of the WUS sequence corresponds to the child There are many cases for the number of frames. The possible value sets of M corresponding to different L are shown in Table 1.

Table 1

LL	M可能的取值集合Set of possible values of M
11	{1}{1}
22	{1,2}{1,2}
44	{1,2,4}{1,2,4}
88	{1,2,4,8}{1,2,4,8}
1616	{1,2,4,8,16}{1,2,4,8,16}
3232	{1,2,4,8,16,32}{1,2,4,8,16,32}
6464	{1,2,4,8,16,32,64}{1,2,4,8,16,32,64}
128128	{1,2,4,8,16,32,64,128}{1,2,4,8,16,32,64,128}
256256	{1,2,4,8,16,32,64,128,256}{1,2,4,8,16,32,64,128,256}
512512	{1,2,4,8,16,32,64,128,256,512}{1,2,4,8,16,32,64,128,256,512}
10241024	{1,2,4,8,16,32,64,128,256,512,1024}{1,2,4,8,16,32,64,128,256,512,1024}

For example, when L is 1, then M is 1, and when L is 8, the possible values of M are 1, 2, 4, and 8. In this embodiment of the present application, the terminal device determines the number of subframes K corresponding to the candidate duration of the wake-up signal sequence, and the value of K is a possible value of M corresponding to L.

1. The generation of WUS.

The NB-IoT system has three deployment modes: inband deployment (inband, IB), guardband deployment (guardband, GB), and independent deployment (standalone, SA); under different deployment modes, the location of WUS mapping is different.

In the IB deployment mode, the last 11 OFDM symbols of each subframe can be used to transmit WUS, each OFDM symbol includes 12 REs, and a total of 132 REs can be used to transmit WUS; in GB deployment mode and SA deployment mode, each subframe All OFDM symbols (that is, 14 OFDM symbols) of the frame can be used to transmit WUS. As shown in Figure 1B, it is a schematic diagram of WUS sequence generation in IB deployment mode.

The WUS sequence is generated based on the ZC sequence and the Gold sequence. Since the actual duration of the WUS sequence corresponds to the number of subframes M, the WUS sequence mapped on any subframe is based on the first sequence in the ZC sequence and the Gold sequence Generated.

Among them, the ZC sequence used by the WUS sequence mapped on any subframe is the same. The length of the initially generated ZC sequence is 131, and then the length of the cyclic shift is extended to 132. The final ZC sequence is a complex sequence of length 132 .

For the Gold sequence, the WUS sequence mapped on any subframe needs to use different parts of the Gold sequence; when generating the Gold sequence, the seed is initialized only once at the WUS starting position (the first subframe of WUS mapping) to generate M subframe correspondences The length of is to generate a Gold sequence with a length of 2*132*M, and the Gold sequence is a sequence composed of 0 and 1. The WUS sequence mapped on each subframe is generated based on the first sequence with a length of 264 intercepted in the Gold sequence. Different subframes correspond to different first sequences, and then modulated. Modulation refers to modulating 2 bits to 1. A complex number, such as 00, 01, 10, and 11 can be modulated as +1, -1, +j, -j respectively; the length of the first sequence after modulation is 132.

For any subframe, generate the WUS sequence mapped on the subframe according to the ZC sequence and the modulated first sequence corresponding to the subframe. For example, the ZC sequence and the first sequence are multiplied by the sequence point to generate the length of the subframe The WUS sequence mapped above has a sequence length of 132; the sequence is mapped to the last 11 OFDM symbols of the subframe.

As shown in Figure 1C, in the GB deployment mode and the SA deployment mode, for any subframe, you can first generate the WUS sequence mapped on the last 11 OFDM symbols according to the WUS sequence generation method in the IB deployment mode, and then combine the seventh and 8. The WU sequence mapped on the 9 OFDM symbols is copied to the first 3 OFDM symbols of the subframe.

Currently, there are two ways for network devices to send WUS to terminal devices:

The first type is that the terminal devices corresponding to the same PO are not grouped, and the WUS for each terminal device is the same.

For example, if there are 100 terminal devices (numbered from 0 to 99) whose POs are the same PO, if the network device needs to wake up the terminal device numbered 0, the network device sends WUS before the PO; and these 100 terminal devices will all be in the PO WUS was tested before. If all 100 terminal devices detect WUS, all 100 terminal devices will be awakened. But in fact, the terminal devices numbered from 1 to 99 do not need to be awakened. Therefore, these 99 terminal devices do not need to be awakened, and a "false alarm" occurs, causing 99 of the terminal devices to generate excess power consumption.

In order to reduce the power consumption of terminal equipment, a second WUS transmission method is proposed.

The second type is to group terminal devices. Each terminal device in the group corresponds to a unique WUS.

Assuming that 100 terminal devices (numbered UE 0～99) belong to the same PO, these 100 terminal devices can be divided into 4 groups, for example, UE 0～24 belong to group 0, and UE 25～49 belong to group 1. , UE 50-74 belong to group 2, UE 75-99 belong to group 3.

You can introduce 4 groups-specific WUS, each group corresponds to one of the specific WUS, for example, group n corresponds to WUS#n.

If the network device needs to wake up UE 0, the network device can send the wake-up signal #0 corresponding to group 0 before PO;

For the 25 terminal devices in group 0, these terminal devices will be awakened if they detect the wake-up signal #0; for 75 UEs in

groups

1, 2, and 3, these terminal devices only detect the corresponding group The wake-up signal will not detect the wake-up signal #0 corresponding to group 0 and will not be awakened.

It should be noted that a common WUS (common WUS) can also be set to wake up all terminal devices. Any terminal device that detects a common WUS on the PO will be awakened.

In the case of terminal equipment grouping, the total number of groups is G. In the process of generating the unique WUS of each group, the length of the Gold sequence used is 264*G*M, and different groups intercept different segments of the Gold sequence , The intercepted length is 264*M. As shown in Figure 1D, it is a schematic diagram of the different segments of the Gold sequence that need to be intercepted when generating WUS unique to different groups. As shown in Figure 1D, they are intercepted in order by the number of the group, for example, group 1 intercepts the Gold sequence The first segment of the sequence is 264*M in length, and group 2 intercepts the second segment of the sequence of 264*M in the Gold sequence.

It should be noted that the interception method shown in FIG. 1D is only an example. In specific implementation, other preset sequences may also be used for interception, but the interception length and the Gold sequence are unchanged.

2. WUS detection by terminal equipment.

Since the terminal device cannot know M, when the terminal device detects WUS, it needs to perform a blind inspection, that is, detect the possible values of M separately until the detection is successful.

Taking L as 128 as an example, the possible value set of M is {1,2,4,...,128}.

The terminal device can first assume that M=1, generate the corresponding local sequence in the same way as the network device side, and perform sequence detection on the received WUS sequence based on the corresponding local sequence. Specifically, according to the corresponding local sequence and WUS sequence Generate a correlation value and determine whether the correlation value exceeds the threshold.

If the correlation value exceeds the threshold, it means that the WUS sequence is detected, and the WUS sequence can be stopped; if the correlation value does not exceed the threshold, the terminal device needs to blindly detect the next M value.

When the terminal device assumes M=1, the correlation value generated during sequence detection does not exceed the threshold; the terminal device will detect the next possible value of M. For example, the terminal device can assume M=2 and generate the corresponding value in the same way as the network device side. Based on the corresponding local sequence, perform sequence detection on the received WUS sequence, and repeat the sequence detection process when M=1.

The sequence of the possible values of the blind detection M of the terminal device may follow the order of M from small to large, or may follow other conveniences, which is not limited.

When the terminal device generates the local sequence, the method used is the same as that of the network device to generate WUS. Taking the group to which the terminal device belongs is group 2 as an example, that is, the second method for the corresponding network device to send WUS, each for each M When performing sequence detection on possible values, the terminal device will generate a Gold sequence with a length of 264*G*M, and then intercept the corresponding sequence of 264*M in the Gold sequence of the group to which the terminal device belongs. If the network device intercepts As shown in Figure 1D, the terminal device will also intercept the second segment of the Gold sequence with a length of 264*M, and then generate a local sequence unique to group 2 to perform sequence detection on the received wake-up signal .

Obviously, because the terminal device needs to perform blind detection, a possible value of M will generate a Gold sequence with a length of 264*G*M. For different M, the generated Gold sequence is different, and the terminal device intercepts the Gold sequence The part is also different. As shown in Figure 1E, it is the position of the intercepted Gold sequence when the terminal device performs blind detection of the wake-up signal. One of the squares represents the sequence of the corresponding Gold sequence with a length of 264, for example, M=1 When the terminal equipment intercepts the nth square, when M=2, the terminal equipment intercepts the n+1, n+2 squares, (the n-1, n+1 squares are the terminal equipment of group 1 need to intercept的); When M is different, the Gold sequence intercepted by the terminal device is unrelated, and the generated local sequence is different, that is, for a possible value of M, the terminal device needs to use the same process for sequence detection, so the complexity of blind detection Will become larger and power consumption will increase.

As shown in FIG. 2, a schematic diagram of a network architecture provided by an embodiment of this application, which includes a network device (taking a base station as an example) and multiple terminal devices (taking a UE as an example). The application scenarios involved in the embodiments of this application can be applied to the NB-IoT system, and can also be applied to the network architecture of other communication systems, such as Long Term Evolution (LTE) systems, 5G NR systems, and global mobile communication systems ( global system for mobile communication (GSM), mobile communication system (universal mobile telecommunications system, UMTS), code division multiple access (CDMA) system, of course, this application scenario can also be applied to multiple terminals Communication system composed of equipment.

As shown in Figure 2, it includes a base station and 6 UEs, UE1 to UE6. UE1 to UE6 may be terminal devices under the NB-IoT system, such as mobile phones, automobiles, televisions, smart home appliances, printers, etc.

UE1 to UE6 can all send uplink data to the base station, and the base station can receive uplink data from UE1 to UE6. In addition, the base station can also send information to UE1 to UE6 (such as the wake-up signal sequence involved in the embodiment of this application). If UE1 to UE6 After receiving the information, you can do the corresponding operation (such as sequence detection, or wake-up).

It should be noted that multiple UEs can also form a communication system. As shown in Figure 1, UE4 to UE6 can form a communication system. UE4 and UE6 can send data to UE5, and UE5 can send wake-up signal sequences to UE4 and UE6. .

The network device and at least one terminal device shown in Figure 2 can be used to implement the technical solutions provided in the embodiments of this application. Similarly, the two terminal devices (such as UE5 and UE4) shown in Figure 2 can also be used to implement the implementation of this application. The technical solutions provided by the examples, for convenience of explanation, the interaction between the network device and the terminal device is taken as an example in the embodiments of this application, and the communication system formed by the terminal devices implements the technical solutions provided in the embodiments of this application. For example, only one of the terminal devices needs to be regarded as a device that can realize the function of the network device in the embodiment of the present application, and the principle is similar, and will not be repeated.

In order to enable the terminal device to save power consumption during the blind detection of WUS, an embodiment of the present application provides a wake-up signal sending method, wherein the length of the GOLD sequence used by the first device in the process of generating the wake-up signal sequence is 264*L*(N-1)+264*M, N is the sequence index corresponding to the group to which the terminal device belongs, L is the number of subframes corresponding to the maximum duration of the wake-up signal sequence, and M is the actual wake-up signal sequence The number of subframes corresponding to the duration, L is an integer, M is a positive integer and less than or equal to L, and N is a positive integer greater than 1. Correspondingly, the second device uses the same method when generating the local sequence. The length of the GOLD sequence is 264*L*(N-1)+264*K, and K is a possible value for the second device to determine M, that is, the number of subframes corresponding to the possible actual duration of the wake-up signal sequence ( It can also be called the number of subframes corresponding to the candidate duration of the wake-up signal sequence), K is a positive integer and less than or equal to L, so that when different K is selected, it can be seen that the GOLD sequence used will always have the same Part, for the same part, you can continue to use the previous sequence detection result of that part, and only perform sequence detection for different parts, which can effectively save power consumption.

The technical features involved in the embodiments of the present application are introduced as above, and the technical solutions provided by the embodiments of the present application are described in conjunction with the accompanying drawings.

The embodiment of the present application provides a method for sending a wake-up signal. Please refer to FIG. 3, which is a flowchart of the method. In the following introduction process, the method is applied to the network architecture shown in FIG. 2, the first device is a network device, and the second device is a terminal device as an example. In implementation, in the embodiment of this application, the first device and the second device The two devices may also be terminal devices, and when applied in a D2D scenario, the first device may send a wake-up signal sequence to the second device.

Step 301: The network device generates a wake-up signal sequence based on the ZC sequence and the GOLD sequence, the length of the GOLD sequence is 264*L*(N-1)+264*M, N is the sequence index corresponding to the group to which the terminal device belongs, and L is the wake-up The number of subframes corresponding to the maximum duration of the signal sequence, M is the number of subframes corresponding to the actual duration of the wake-up signal sequence, L is a positive integer, M is a positive integer and less than or equal to L, and N is a positive integer greater than 1.

Step 302: The network device sends a wake-up signal sequence to the terminal device. Since the number of subframes that can be mapped by the wake-up signal sequence is M, in actual transmission, some subframes have been mapped with other messages, such as system messages, in order not to affect the subframes For other messages above, the wake-up signal sequence may not be mapped on these subframes, that is, during the transmission process, the number of subframes mapped by the wake-up signal sequence may be less than M.

Step 303: After the terminal device receives the wake-up signal sequence from the network device, the terminal device generates a local sequence based on the ZC sequence and the GOLD sequence. The length of the GOLD sequence is 264*L*(N-1)+264*K, and K is determined by the terminal device The number of subframes corresponding to the candidate duration of the wake-up signal sequence, K is any possible value of M, and K is less than or equal to L.

Step 304: The terminal device performs sequence detection on the wake-up signal sequence based on the local sequence.

Among them, steps 301 to 302 are the process of generating and sending WUS on the network device side, and steps 303 to 304 are the process of generating a local sequence on the terminal device side and performing sequence detection.

The wake-up signal sequence can be used to wake up the terminal device. The terminal device that detects the wake-up signal sequence can wake up. The wake-up signal sequence can also have other specific functions. For example, the terminal device can use the wake-up signal to achieve downlink synchronization and cell confirmation.

It should be noted that when the network device generates the wake-up signal sequence, the length of the GOLD sequence used is 264*L*(N-1)+264*M, N is the sequence index corresponding to the group to which the terminal device belongs, and the setting of N The manner is not limited in the embodiment of the present application. N may be determined according to the sorting position of the group to which the terminal device belongs in multiple groups, or may be determined according to a preset rule.

Exemplarily, the network device may pre-generate a reference GOLD sequence with a length of G*L*264, and the network device may intercept the GOLD sequence required to generate the wake-up signal sequence from the reference GOLD sequence, and N may represent the group to which the terminal device belongs Sequence index in the reference GOLD sequence.

As shown in Figure 4, when generating WUS unique to different groups, it is necessary to refer to the schematic diagram of the Gold sequence intercepted in the GOLD sequence. As shown in Figure 1E, the sequence is intercepted according to the group number, for example, group 1 interception Refer to the sequence of length 264*M in the GOLD sequence, group 2 intercepts the sequence of length 264*L+264*M in the reference Gold sequence (N is 2), group 3 intercepts the sequence of length 264*L in the reference Gold sequence *2+264*M sequence (N is 3). In this case, N is the same as the group number.

It should be noted that the above method of determining the Gold sequence by referring to the Gold sequence is only an example. The embodiments of the present application do not limit the length of the reference Gold sequence, and the position where the Gold sequence is intercepted with reference to the Gold sequence, as long as the intercepted length satisfies 264*L* (N-1)+264*M is enough.

N can be set to the same value as the group number, or it can be set to a value corresponding to the group index. Before the network device generates the wake-up signal sequence based on the ZC sequence and the GOLD sequence, N needs to be determined. Exemplary, multiple A terminal device is connected to a network device. In this case, the network device corresponds to multiple terminal devices, and any one of the terminal devices belongs to one or more groups. For any group, the group has a group index. One sequence index corresponds, one group index can correspond to one sequence index, multiple group indexes can each correspond to one sequence index, and one group index can also correspond to multiple sequence indexes. The group index is not limited in the embodiment of this application. Correspondence between and sequence index.

The network device may determine the sequence index N corresponding to the group to which the terminal device belongs according to the group index of the group to which the terminal device belongs based on the correspondence between the group index and the sequence index of the group.

The group index to which the terminal device belongs is used to indicate the group to which the terminal device belongs. For example, the terminal device belongs to group 1. The group index of the group to which the terminal device belongs can be set to 1, or it can be a specific calculation after 1 Value; this embodiment of the application does not limit the number of group indexes a terminal device belongs to. Since a terminal device can belong to multiple different groups at the same time, there can be multiple group indexes to which a terminal device belongs; for example, a terminal device belongs to a group 1 and group 2, the group index of the group to which the terminal device belongs can be two, such as 1 and 2. The embodiment of the present application does not limit the setting manner of the group index, and any value that can indicate the group to which the terminal device belongs can be used as the group index.

The corresponding relationship between the group index g and the sequence index N of the group can be preset, for example, N=g+2, the group index can be a natural number, and the value of N is a positive integer greater than 1.

It should be noted that N can also be 1, when N is 1, the generated WUS sequence is the WUS sequence under the R15 standard, and the terminal device under the R15 standard can detect the WUS sequence, but under the R16 standard, N can be specified It is 1, so that the terminal equipment under the R16 standard will not detect the WUS sequence, so that it can distinguish between the R15 standard and the WUS sequence under the R16 standard. N can also be 2. When N is 2, the generated WUS sequence can be a public WUS, which is used to wake up all terminal devices in the group; usually, all terminal devices need to detect public WUS, and when N=2, the Gold sequence used The length is shorter, which can effectively save power consumption.

The embodiment of the present application does not limit the number of sequence indexes corresponding to the group to which the terminal device belongs. For example, in the case where a public WUS needs to be detected, the sequence index corresponding to the group to which the terminal device belongs may include the sequence index required to generate the public WUS. And generate the sequence index required by the specific WUS of the group to which the terminal device belongs. Taking N=g+2 as an example, the sequence indexes corresponding to group 2 are 1 and 3, where 1 is the sequence index required to generate the public WUS, and 3 is the sequence index required to generate the group-specific WUS to which the terminal device belongs.

When a network device generates a wake-up signal sequence based on the ZC sequence and the GOLD sequence, two methods can be used, which are described below:

Manner 1: The network device first intercepts the target sequence from the GOLD sequence, and then generates the wake-up signal sequence based on the ZC sequence and the target sequence.

The network equipment intercepts the length of the target sequence from the GOLD sequence to M*264, which can form the 264*L*(N-1)+1 bit to the 264*L*(N-1)+264*M bit in the GOLD sequence Target sequence.

It should be noted that the position of the elements in the GOLD sequence is sorted from 1, which means that the first position of the GOLD sequence is the first.

When N=2, the network device can set the 264*L+1th bit to 264*L+264*M in the GOLD sequence to form the target sequence; when N=3, the network device can set the 264*Lth bit in the GOLD sequence *2+1 bits to 264*L*2+264*M bits constitute the target sequence.

After intercepting the target sequence, since the GOLD sequence is a sequence composed of 0 and 1, the ZC sequence is a complex number sequence. In order to achieve sequence point multiplication, the network device can convert the target sequence into a complex number sequence. For example, two adjacent ones of the target sequence can be converted. Each element is converted into a complex number, and other methods may also be used to convert into a complex number sequence, which is not limited in the embodiment of the present application.

Then, according to the ZC sequence and the complex number sequence converted from the target sequence, a wake-up signal sequence is generated. Specifically, the ZC sequence and the complex number sequence converted from the target sequence are subjected to sequence dot multiplication to generate the wake-up signal sequence.

In generating the wake-up signal sequence, in addition to the ZC sequence and the GOLD sequence, other sequences can be introduced. For example, the wake-up signal sequence can be generated based on the ZC sequence, the GOLD sequence, and the first sequence. The embodiment of this application does not limit the first sequence. The number and form of the sequence.

Exemplarily, when a network device generates a wake-up signal sequence, the wake-up signal sequence may satisfy a certain formula:

Among them, w _N (m) is the wake-up signal sequence, w _N (m) can be regarded as the wake-up signal sequence mapped on one of the subframes, x=0,1,...,M-1, m=0,1 ,...,131,

Is the ZC sequence,

among them

Is the cell identity, n=m mod132,

Is the GOLD sequence,

Is the target sequence intercepted in the GOLD sequence, N is the sequence index corresponding to the group to which the second device belongs, n _f is the frame number of the first frame where the first paging opportunity PO corresponding to the wake-up signal sequence is located, and n _s is the wake-up The time slot number of the first time slot where the first PO corresponds to the signal sequence.

Manner 2: The network device first generates a candidate wake-up signal sequence based on the ZC sequence and the GOLD sequence, and then intercepts the wake-up signal sequence from the candidate wake-up signal sequence.

Since the GOLD sequence is a sequence composed of 0 and 1, the ZC sequence is a complex number sequence. In order to achieve sequence point multiplication, the network device can convert the GOLD sequence into a complex number sequence, and then generate it according to the ZC sequence and the complex number sequence converted from the GOLD sequence Candidate wake-up signal sequence, specifically, the ZC sequence and the complex number sequence converted from the target sequence are sequenced and multiplied to generate a candidate wake-up signal sequence. The length of the candidate wake-up signal sequence is 132*L*(N-1)+132* M.

Exemplarily, the candidate wake-up signal sequence can satisfy the similar formula in Method 1, which will not be repeated here. The difference is

The length of should be 264*L*(N-1)+264*M.

In the process of generating the candidate wake-up signal sequence, in addition to the ZC sequence and the GOLD sequence, other sequences can be introduced. For example, the candidate wake-up signal sequence can be generated based on the ZC sequence, the GOLD sequence, and the second sequence. The number and form of the second sequence are not limited.

The network device intercepts the 132*L*(N-1)+1th to 132*L*(N-1)+132*M bits of the candidate wake-up signal sequence as the wake-up signal sequence.

After the network device generates the wake-up signal sequence, it sends the wake-up signal sequence to the terminal device. The terminal device needs to detect the wake-up signal sequence. The following describes how the terminal device detects the wake-up signal sequence:

When the terminal device generates a local sequence, the length of the GOLD sequence used is 264*L*(N-1)+264*K, and N is the sequence index corresponding to the group to which the terminal device belongs.

The manner of setting N can be referred to the foregoing description, which will not be repeated here. The manner in which the terminal device determines N and obtains the GOLD sequence is the same as the manner in which the network device determines N and obtains the GOLD sequence. The only difference is that the execution subject is different.

It should be noted that since the terminal device cannot know the value of M, when the terminal device performs WUS detection, it needs to generate a local sequence based on some possible values of M, where K represents any of the possible value sets of M corresponding to L value.

Similar to the network device side, when the terminal device generates a local sequence based on the ZC sequence and the GOLD sequence, two methods can be used, which are described below:

Manner 1: The terminal device first intercepts the target sequence from the GOLD sequence, and then generates the local sequence based on the ZC sequence and the target sequence.

The terminal equipment intercepts the length of the target sequence from the GOLD sequence to K*264, which can form the 264*L*(N-1)+1 bit to the 264*L*(N-1)+264*K bit in the GOLD sequence Target sequence.

It should be noted that the position of each element in the GOLD sequence is sorted from 1, which means that the first position of the GOLD sequence is the first.

When N=2, the terminal device can form the target sequence from the 264*L+1th bit to the 264*L+264*K bit in the GOLD sequence; when N=3, the terminal device can combine the 264*Lth bit in the GOLD sequence *2+1 bits to 264*L*2+264*K bits constitute the target sequence.

After intercepting the target sequence, since the GOLD sequence is a sequence composed of 0 and 1, the ZC sequence is a complex sequence. In order to realize the sequence dot multiplication, the terminal device can convert the target sequence into a complex sequence, and then convert it according to the ZC sequence and the target sequence The obtained complex number sequence generates a local sequence. Specifically, the ZC sequence and the complex number sequence converted from the target sequence are subjected to sequence dot multiplication to generate the local sequence.

When generating the local sequence, in addition to the ZC sequence and the GOLD sequence, other sequences can also be introduced. For example, the local sequence can be generated based on the ZC sequence, the GOLD sequence, and the first sequence. The embodiments of this application do not limit the first sequence. Number and form.

Exemplarily, when the terminal device generates a local sequence, the local sequence may satisfy a certain formula:

Among them, w _N (m) is the local sequence, x=0,1,...,K-1, m=0,1,...,131,

Is the ZC sequence,

among them

Is the cell identity, the cell is the cell where the terminal equipment is located, n=m mod 132,

Is the GOLD sequence,

Manner 2: The terminal device first generates a candidate sequence based on the ZC sequence and the GOLD sequence, and then intercepts the local sequence from the candidate sequence.

Since the GOLD sequence is a sequence composed of 0 and 1, and the ZC sequence is a complex number sequence, in order to realize the sequence dot multiplication, the terminal device can convert the GOLD sequence into a complex number sequence, and then generate it according to the ZC sequence and the complex number sequence converted from the GOLD sequence The candidate sequence, specifically, performs sequence dot multiplication on the ZC sequence and the complex number sequence converted from the target sequence to generate a candidate sequence. The length of the candidate sequence is 132*L*(N-1)+132*K.

Exemplarily, the candidate sequence can satisfy the similar formula in Method 1, which will not be repeated here. The difference is

The length of should be 264*L*(N-1)+264*M.

In generating the candidate sequence, in addition to the ZC sequence and the GOLD sequence, other sequences can also be introduced. For example, the candidate sequence can be generated based on the ZC sequence, the GOLD sequence, and the second sequence. The embodiments of this application do not limit the second sequence. Number and form.

The terminal device intercepts the 132*L*(N-1)+1th to 132*L*(N-1)+132*K bits of the candidate sequence as a local sequence.

When the terminal device performs sequence detection, it can determine the correlation value between the local sequence and the wake-up signal sequence. When the correlation value exceeds the threshold, the detection is determined to be successful; the successful detection indicates that the terminal device has determined that the wake-up signal sequence has been detected, or the terminal device has determined the network The device sends a wake-up signal sequence, after which the terminal device can enter the wake-up state.

If the correlation value does not exceed the threshold, it indicates that the detection has failed, and the terminal device can use another K to generate a local sequence and continue sequence detection.

Using the method of the embodiment of this application, it can be seen that when the terminal device generates the local sequence, under different K values, there will be the same part between the GOLD sequences used. As shown in Figure 5, when the terminal device generates the local sequence , The position of the intercepted target sequence in the reference GOLD sequence, one of the squares represents the sequence of length 264 in the corresponding reference GOLD sequence, for example, when K=1, the terminal device intercepts the nth square as the target sequence, When K=2, the terminal equipment intercepts the n and n+1 squares.

When K is different, there is an association between the target sequences intercepted by the terminal equipment. When doing sequence detection, the result of sequence detection with K=2 can use the result of sequence detection with K=1, which only needs to be based on the n+1th square The characterized sequence can be tested for sequence, which can reduce the power consumption of the terminal device.

Based on the same inventive concept as the method embodiment, the embodiment of the present application also provides a communication device for executing the method executed by the network device (or the first device) in the above method embodiment. For related features, please refer to the above method embodiment. Details are not repeated here. As shown in FIG. 6, the device includes a processing unit 601 and a sending unit 602:

The processing unit 601 is configured to generate a wake-up signal sequence based on the ZC sequence and the GOLD sequence, the length of the GOLD sequence is 264*L*(N-1)+264*M, N is the sequence index corresponding to the group to which the second device belongs, L Is the number of sub-frames corresponding to the maximum duration of the wake-up signal sequence, L is a positive integer, M is the number of sub-frames corresponding to the actual duration of the wake-up signal sequence, M is a positive integer and less than or equal to L, and N is a positive value greater than 1. Integer

The sending unit 602 is configured to send a wake-up signal sequence to the second device.

As a possible implementation manner, when the processing unit 601 generates the wake-up signal sequence based on the ZC sequence and the GOLD sequence, it may adopt a method of first intercepting and then generating. For example, the processing unit 601 may first intercept the 264*L in the GOLD sequence. *(N-1)+1 bits to 264*L*(N-1)+264*M bits constitute the target sequence; then, a wake-up signal sequence is generated based on the ZC sequence and the target sequence.

As a possible implementation manner, the processing unit 601 generates the wake-up signal sequence based on the ZC sequence and the target sequence, and may generate the wake-up signal sequence according to the ZC sequence and the complex number sequence converted from the target sequence.

As a possible implementation manner, when the processing unit 601 generates the wake-up signal sequence based on the ZC sequence and the GOLD sequence, it may use the method of first generating the sequence and then intercepting it. Illustratively, the processing unit 601 may first generate the wake-up signal sequence based on the ZC sequence and the GOLD sequence. Candidate wake-up signal sequence, the length of the candidate wake-up signal sequence is 132*L*(N-1)+132*M; after that, intercept the 132*L*(N-1)+1 bits of the candidate wake-up signal sequence to the 132nd *L*(N-1)+132*M bits are used as the wake-up signal sequence.

As a possible implementation manner, when the processing unit 601 generates the candidate wake-up signal sequence based on the ZC sequence and the GOLD sequence, it may generate the candidate wake-up signal sequence according to the ZC sequence and the complex number sequence converted from the GOLD sequence.

As a possible implementation, the wake-up signal sequence may satisfy the following formula:

Is the ZC sequence,

among them

Is the cell identity, n=m mod132,

As a possible implementation manner, the first device may correspond to multiple second devices, each of the multiple second devices belongs to at least one group, and each group has a group index, and each The group index corresponds to a sequence index. Before generating the wake-up signal sequence based on the ZC sequence and the GOLD sequence, the processing unit 601 may first based on the correspondence between the group index and the sequence index of the group, and according to the group to which the second device belongs The group index of determines the sequence index N corresponding to the group to which the second device belongs.

Based on the same inventive concept as the method embodiment, the embodiment of the present application also provides a communication device for executing the method executed by the terminal device (or the second device) in the above method embodiment. For related features, please refer to the above method embodiment. Details are not repeated here. As shown in FIG. 7, the device includes a receiving unit 701 and a processing unit 702:

The receiving unit 701 is configured to receive a wake-up signal sequence from the first device;

The processing unit 702 is configured to generate a local sequence based on the ZC sequence and the GOLD sequence. The length of the GOLD sequence is 264*L*(N-1)+264*K, where N is the sequence index corresponding to the group to which the second device belongs, and L is The number of subframes corresponding to the maximum duration of the wakeup signal sequence, L is a positive integer, K is the number of subframes corresponding to the candidate duration of the wakeup signal sequence determined by the second device, K is a positive integer and less than or equal to L, N is A positive integer greater than 1; and based on the local sequence, sequence detection is performed on the wake-up signal sequence.

As a possible implementation manner, when the processing unit 702 generates a local sequence based on the ZC sequence and the GOLD sequence, it may adopt a method of first interception and then generation. For example, the processing unit 702 may first intercept the 264*L*th in the GOLD sequence. (N-1)+1 bits to 264*L*(N-1)+264*K bits constitute the target sequence; after that, a wake-up signal sequence is generated based on the ZC sequence and the target sequence.

As a possible implementation manner, when the processing unit 702 generates a local sequence based on the ZC sequence and the target sequence, it may generate the local sequence according to the ZC sequence and the complex number sequence converted from the target sequence.

As a possible implementation manner, when the processing unit 702 generates a local sequence based on the ZC sequence and the GOLD sequence, the sequence may be generated first and then intercepted. For example, the processing unit 702 may first generate a candidate based on the ZC sequence and the GOLD sequence. Sequence, the length of the candidate sequence is 132*L*(N-1)+132*K; after that, intercept the 132*L*(N-1)+1 position of the candidate sequence to the 132*L*(N-1) )+132*K bits as the local sequence.

As a possible implementation manner, when the processing unit 702 generates the candidate sequence based on the ZC sequence and the GOLD sequence, it may generate the candidate sequence according to the ZC sequence and the complex sequence obtained by conversion of the GOLD sequence.

As a possible implementation, the local sequence may satisfy the following formula:

Among them, w _N (m) is the local sequence, x=0,1,...,K-1, m=0,1,...,131,

Is the ZC sequence,

among them

Is the cell identity, n=m mod 132,

As a possible implementation manner, when the processing unit 702 performs sequence detection on the wake-up signal sequence based on the local sequence, it first determines the correlation value between the local sequence and the wake-up signal sequence, and determines that the detection is successful if the correlation value exceeds the threshold; In the case that the correlation value does not exceed the threshold, it is determined that the detection fails, and it can be considered that the first device has not sent the wake-up signal sequence with the number of subframes corresponding to the duration of K.

As a possible implementation manner, each second device of the plurality of second devices corresponding to the first device belongs to at least one group, each group has a group index, and each group index and a sequence index Correspondingly, before generating the local sequence based on the ZC sequence and the GOLD sequence, the processing unit 702 can determine the second device to belong to based on the corresponding relationship between the group index and the sequence index of the group, according to the group index of the group to which the second device belongs The sequence index N corresponding to the group.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .

In a simple embodiment, those skilled in the art can imagine that all terminal devices can adopt the form shown in FIG. 8.

The communication device 800 shown in FIG. 8 includes at least one processor 801, a memory 802, and optionally, a communication interface 803.

The memory 802 may be a volatile memory, such as random access memory; the memory may also be a non-volatile memory, such as read-only memory, flash memory, hard disk drive (HDD) or solid-state drive (solid-state drive, SSD) or the memory 802 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 802 may be a combination of the above-mentioned memories.

The specific connection medium between the processor 801 and the memory 802 is not limited in the embodiment of the present application.

The processor 801 may have a data transceiver function and can communicate with other devices. In the device shown in Figure 8, an independent data transceiver module, such as a communication interface 803, may be used to send and receive data; the processor 801 is communicating with other devices. During communication, data transmission can be performed through the communication interface 803.

When the network device adopts the form shown in FIG. 8, the processor 801 in FIG. 8 can invoke the computer-executed instruction stored in the memory 802, so that the network device can execute the method executed by the network device in any of the foregoing method embodiments.

Specifically, the functions/implementation processes of the sending unit and the processing unit in FIG. 6 can all be implemented by the processor 801 in FIG. 8 calling a computer execution instruction stored in the memory 802. Alternatively, the function/implementation process of the processing unit in FIG. 6 may be implemented by the processor 801 in FIG. 8 calling computer execution instructions stored in the memory 802, and the function/implementation process of the sending unit in FIG. The communication interface 803 is implemented.

In a simple embodiment, those skilled in the art can imagine that all terminal devices can adopt the form shown in FIG. 9.

The communication device 900 shown in FIG. 9 includes at least one processor 901, a memory 902, and optionally, a transceiver 903.

The memory 902 may be a volatile memory, such as random access memory; the memory may also be a non-volatile memory, such as read only memory, flash memory, hard disk drive (HDD) or solid-state drive (solid-state drive, SSD) or the memory 902 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 902 may be a combination of the above-mentioned memories.

The specific connection medium between the foregoing processor 901 and the memory 902 is not limited in the embodiment of the present application.

The processor 901 may have a data transceiver function and can communicate with other devices. In the device shown in Figure 9, an independent data transceiver module, such as a transceiver 903, may be used to transmit and receive data; the processor 901 may communicate with other devices. During communication, the transceiver 903 can be used for data transmission.

When the terminal device adopts the form shown in FIG. 9, the processor 901 in FIG. 9 can invoke the computer execution instructions stored in the memory 902 to enable the terminal device to execute the method executed by the terminal device in any of the foregoing method embodiments.

Specifically, the functions/implementation process of the receiving unit and the processing unit in FIG. 7 can all be implemented by the processor 901 in FIG. 9 invoking a computer execution instruction stored in the memory 902. Alternatively, the function/implementation process of the processing unit in FIG. 7 may be implemented by the processor 901 in FIG. 9 calling computer execution instructions stored in the memory 902, and the function/implementation process of the receiving unit in FIG. 7 may be implemented by The transceiver 903 is implemented.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A method for sending a wake-up signal, which is characterized in that it includes:

The first device generates a wake-up signal sequence based on the ZC sequence and the GOLD sequence. The length of the GOLD sequence is 264*L*(N-1)+264*M, where N is the sequence index corresponding to the group to which the second device belongs, and L is The number of subframes corresponding to the maximum duration of the wake-up signal sequence, L is a positive integer, M is the number of subframes corresponding to the actual duration of the wake-up signal sequence, M is a positive integer and less than or equal to L, and N is greater than A positive integer of 1;

The first device sends the wake-up signal sequence to the second device.
The method according to claim 1, wherein the first device generating a wake-up signal sequence based on the ZC sequence and the GOLD sequence comprises:

The first device intercepts the 264*L*(N-1)+1th bit to the 264*L*(N-1)+264*M bit in the GOLD sequence to form a target sequence;

The first device generates the wake-up signal sequence based on the ZC sequence and the target sequence.
The method of claim 2, wherein the first device generating the wake-up signal sequence based on the ZC sequence and the target sequence comprises:

The first device generates the wake-up signal sequence according to the ZC sequence and the complex number sequence converted from the target sequence.
The method according to claim 1, wherein the first device generating a wake-up signal sequence based on the ZC sequence and the GOLD sequence comprises:

The first device generates a candidate wake-up signal sequence based on the ZC sequence and the GOLD sequence, and the length of the candidate wake-up signal sequence is 132*L*(N-1)+132*M;

The first device intercepts the 132*L*(N-1)+1th to 132*L*(N-1)+132*M bits of the candidate wake-up signal sequence as the wake-up signal sequence.
The method of claim 4, wherein the first device generating a candidate wake-up signal sequence based on the ZC sequence and the GOLD sequence comprises:

The first device generates the candidate wake-up signal sequence according to the ZC sequence and the complex sequence converted from the GOLD sequence.
The method according to claim 2, wherein the wake-up signal sequence satisfies the following formula:

Wherein, w N (m) is the wake-up signal sequence, x=0,1,...,M-1, m=0,1,...,131,
Is the ZC sequence,
among them
Is the cell identity, n=m mod132,

Is the GOLD sequence, N is the sequence index corresponding to the group to which the second device belongs, n f is the frame number of the first frame where the first paging opportunity PO corresponding to the wake-up signal sequence is located, and n s is The time slot number of the first time slot in which the first PO corresponding to the wake-up signal sequence is located.
The method according to any one of claims 1 to 6, wherein each second device of the plurality of second devices corresponding to the first device belongs to at least one group, and each group has a group Index. Each group index corresponds to a sequence index. Before the first device generates a wake-up signal sequence based on the ZC sequence and the GOLD sequence, the method further includes:

The first device determines the sequence index N corresponding to the group to which the second device belongs according to the group index of the group to which the second device belongs based on the correspondence between the group index and the sequence index of the group.
A method for sending a wake-up signal, which is characterized in that it includes:

The second device receives the wake-up signal sequence from the first device;

The second device generates a local sequence based on the ZC sequence and the GOLD sequence, the length of the GOLD sequence is 264*L*(N-1)+264*K, and N is the sequence index corresponding to the group to which the second device belongs , L is the number of subframes corresponding to the maximum duration of the wake-up signal sequence, L is a positive integer, K is the number of subframes corresponding to the candidate duration of the wake-up signal sequence determined by the second device, and K is positive Integer and less than or equal to L, N is a positive integer greater than 1;

The second device performs sequence detection on the wake-up signal sequence based on the local sequence.
The method according to claim 8, wherein the second device generating a local sequence based on the ZC sequence and the GOLD sequence comprises:

The second device intercepts the 264*L*(N-1)+1th bit to the 264*L*(N-1)+264*K bit in the GOLD sequence to form a target sequence;

The second device generates the wake-up signal sequence based on the ZC sequence and the target sequence.
The method of claim 9, wherein the second device generating a local sequence based on the ZC sequence and the target sequence comprises:

The second device generates the local sequence according to the ZC sequence and the complex sequence converted from the target sequence.
The method according to claim 8, wherein the second device generating a local sequence based on the ZC sequence and the GOLD sequence comprises:

The second device generates a candidate sequence based on the ZC sequence and the GOLD sequence, and the length of the candidate sequence is 132*L*(N-1)+132*K;

The second device intercepts the 132*L*(N-1)+1th bit to the 132*L*(N-1)+132*K position of the candidate sequence as a local sequence.
The method of claim 11, wherein the second device generating candidate sequences based on the ZC sequence and the GOLD sequence comprises:

The second device generates the candidate sequence according to the ZC sequence and the complex sequence converted from the GOLD sequence.
The method according to claim 9, wherein the local sequence satisfies the following formula:

Where, w N (m) is the local sequence, x=0,1,...,K-1, m=0,1,...,131,
Is the ZC sequence,
among them
Is the cell identity, n=m mod 132,

Is the GOLD sequence, N is the sequence index corresponding to the group to which the second device belongs, n f is the frame number of the first frame where the first paging opportunity PO corresponding to the wake-up signal sequence is located, and n s is The time slot number of the first time slot in which the first PO corresponding to the wake-up signal sequence is located.
The method of claim 8, wherein the second device performs sequence detection on the wake-up signal sequence based on the local sequence, comprising:

The second device determines the correlation value between the local sequence and the wake-up signal sequence, and determines that the detection is successful if the correlation value exceeds a threshold.
The method according to any one of claims 8-14, wherein each second device of the plurality of second devices corresponding to the first device belongs to at least one group, and each group has a group Index. Each group index corresponds to a sequence index. Before the second device generates a local sequence based on the ZC sequence and the GOLD sequence, the method further includes:

The second device determines the sequence index N corresponding to the group to which the second device belongs according to the group index of the group to which the second device belongs based on the correspondence between the group index and the sequence index of the group.
A communication device, characterized in that it comprises a processing unit and a sending unit:

The processing unit is configured to generate a wake-up signal sequence based on the ZC sequence and the GOLD sequence, the length of the GOLD sequence is 264*L*(N-1)+264*M, and N is the sequence corresponding to the group to which the second device belongs Index, L is the number of subframes corresponding to the maximum duration of the wake-up signal sequence, L is a positive integer, M is the number of subframes corresponding to the actual duration of the wake-up signal sequence, M is a positive integer and less than or equal to L , N is a positive integer greater than 1;

The sending unit is configured to send the wake-up signal sequence to the second device.
The device according to claim 16, wherein the processing unit is specifically configured to:

Intercepting the 264*L*(N-1)+1th bit to the 264*L*(N-1)+264*M bit in the GOLD sequence to form the target sequence;

The wake-up signal sequence is generated based on the ZC sequence and the target sequence.
The device according to claim 17, wherein the processing unit is configured to generate the wake-up signal sequence based on the ZC sequence and the target sequence, comprising:

It is used to generate the wake-up signal sequence according to the ZC sequence and the complex sequence converted from the target sequence.
The device according to claim 16, wherein the processing unit is specifically configured to:

Generate a candidate wake-up signal sequence based on the ZC sequence and the GOLD sequence, and the length of the candidate wake-up signal sequence is 132*L*(N-1)+132*M;

The 132*L*(N-1)+1th bit to the 132*L*(N-1)+132*M bit of the candidate wake-up signal sequence are intercepted as the wake-up signal sequence.
The device according to claim 19, wherein the processing unit is configured to generate a candidate wake-up signal sequence based on the ZC sequence and the GOLD sequence, comprising:

It is used to generate the candidate wake-up signal sequence according to the ZC sequence and the complex sequence converted from the GOLD sequence.
The device of claim 17, wherein the wake-up signal sequence satisfies the following formula:

Wherein, w N (m) is the wake-up signal sequence, x=0,1,...,M-1, m=0,1,...,131,
Is the ZC sequence,
among them
Is the cell identity, n=m mod132,

Is the GOLD sequence, N is the sequence index corresponding to the group to which the second device belongs, n f is the frame number of the first frame where the first paging opportunity PO corresponding to the wake-up signal sequence is located, and n s is The time slot number of the first time slot in which the first PO corresponding to the wake-up signal sequence is located.
The apparatus according to any one of claims 16 to 21, wherein each second device of the plurality of second devices corresponding to the first device belongs to at least one group, and each group has a group index, Each group index corresponds to a sequence index, and the processing unit is also used for: before generating a wake-up signal sequence based on the ZC sequence and the GOLD sequence:

Based on the correspondence between the group index and the sequence index of the group, the sequence index N corresponding to the group to which the second device belongs is determined according to the group index of the group to which the second device belongs.
A communication device, characterized in that it comprises a receiving unit and a processing unit:

The receiving unit is configured to receive a wake-up signal sequence from the first device;

The processing unit is configured to generate a local sequence based on the ZC sequence and the GOLD sequence, the length of the GOLD sequence is 264*L*(N-1)+264*K, and N is the sequence index corresponding to the group to which the second device belongs , L is the number of subframes corresponding to the maximum duration of the wake-up signal sequence, L is a positive integer, K is the number of subframes corresponding to the candidate duration of the wake-up signal sequence determined by the second device, and K is positive An integer and less than or equal to L, and N is a positive integer greater than 1; and based on the local sequence, sequence detection is performed on the wake-up signal sequence.
The device according to claim 23, wherein the processing unit is specifically configured to:

Intercepting the 264*L*(N-1)+1th bit to the 264*L*(N-1)+264*K bit in the GOLD sequence to form the target sequence;

The wake-up signal sequence is generated based on the ZC sequence and the target sequence.
The device of claim 24, wherein the processing unit is configured to generate a local sequence based on the ZC sequence and the target sequence, comprising:

It is used to generate the local sequence according to the ZC sequence and the complex sequence converted from the target sequence.
The device according to claim 23, wherein the processing unit is specifically configured to:

Generate a candidate sequence based on the ZC sequence and the GOLD sequence, the length of the candidate sequence is 132*L*(N-1)+132*K;

The 132*L*(N-1)+1th position to the 132*L*(N-1)+132*Kth position of the candidate sequence is truncated as a local sequence.
The device according to claim 26, wherein the processing unit is configured to generate candidate sequences based on the ZC sequence and the GOLD sequence, comprising:

It is used to generate the candidate sequence according to the ZC sequence and the complex number sequence converted from the GOLD sequence.
The apparatus of claim 24, wherein the local sequence satisfies the following formula:

Where, w N (m) is the local sequence, x=0,1,...,K-1, m=0,1,...,131,
Is the ZC sequence,
among them
Is the cell identity, n=m mod 132,

Is the GOLD sequence, N is the sequence index corresponding to the group to which the second device belongs, n f is the frame number of the first frame where the first paging opportunity PO corresponding to the wake-up signal sequence is located, and n s is The time slot number of the first time slot in which the first PO corresponding to the wake-up signal sequence is located.
The device according to claim 23, wherein the processing unit is specifically configured to:

The correlation value between the local sequence and the wake-up signal sequence is determined, and if the correlation value exceeds a threshold, it is determined that the detection is successful.
The apparatus according to any one of claims 23-29, wherein each second device in the plurality of second devices corresponding to the first device belongs to at least one group, and each group has a group Index. Each group index corresponds to a sequence index. Before generating a local sequence based on the ZC sequence and the GOLD sequence, the processing unit is also used to:

Based on the correspondence between the group index and the sequence index of the group, the sequence index N corresponding to the group to which the second device belongs is determined according to the group index of the group to which the second device belongs.