WO2022022610A1

WO2022022610A1 - Method for transmitting synchronization signal block, and communication apparatus

Info

Publication number: WO2022022610A1
Application number: PCT/CN2021/109126
Authority: WO
Inventors: 张云昊; 徐修强; 吴艺群
Original assignee: 华为技术有限公司
Priority date: 2020-07-31
Filing date: 2021-07-29
Publication date: 2022-02-03
Also published as: CN114071686A

Abstract

Disclosed are a method for transmitting a synchronization signal block, and a communication apparatus. The method comprises: receiving a first SSB from a network device, the first SSB being a first-type SSB or a second-type SSB, and the first-type SSB and the second-type SSB being different types of SSBs; if the first SSB meets a first condition, determining that the first SSB is the first-type SSB; or, if the first SSB meets a second condition, determining that the first SSB is the second-type SSB.

Description

A transmission method and communication device of a synchronization signal block

This application claims the priority of the Chinese patent application with the application number 202010762152.0 and the title of the invention "a method for transmitting a synchronization signal block and a communication device" filed with the State Intellectual Property Office of China on July 31, 2020, the entire contents of which are approved by Reference is incorporated in this application.

technical field

The present application relates to the field of communication technologies, and in particular, to a method and a communication device for transmitting a synchronization signal block.

Background technique

In order to cope with the explosive growth of mobile data traffic in the future, the connection of massive mobile communication devices, and the emerging of various new services and application scenarios, the fifth generation (5th generation, 5G) mobile communication system came into being. For example, three types of application scenarios are defined in the 5G mobile communication system: enhanced mobile broadband (eMBB) scenarios, ultrareliable and low latency communications (URLLC) scenarios, and massive machine communication (massive machine communication) scenarios. type communications, mMTC) scenarios.

Exemplarily, the eMBB scene includes: ultra-high-definition video, augmented reality (AR), and/or virtual reality (VR), and the like. The main features of these services may be the large amount of data transmitted and the high transmission rate. URLLC scenarios include: wireless control in industrial manufacturing or production processes, motion control of driverless cars or drones, remote repair of driverless cars or drones, and/or haptic interaction applications such as remote surgery . The main features of these services may be ultra-high reliability and low latency of transmission that are required. In addition, the characteristics of these services may also include a small amount of transmitted data and/or burstiness. mMTC scenarios include: smart grid distribution automation, wearable communication, and/or smart cities, etc. The main characteristics of these services can be a large number of networked devices and/or a small amount of data transmitted. In addition, the terminal equipment in the mMTC scenario may need to meet the requirements of low cost and relatively long standby time.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a synchronization signal block transmission method and communication device, which are used by terminal equipment to determine different types of SSBs, so that one or more types of terminal equipment can access the Different types of SSBs can obtain better network services or better transmission capabilities.

In order to solve the above-mentioned technical problems, the embodiments of the present application provide the following technical solutions:

In a first aspect, an embodiment of the present application provides a method for transmitting synchronization signal blocks, including: receiving a first SSB from a network device, where the first SSB is a first type SSB or a second type SSB, the first type SSB and the second type SSB are different types of SSB; if the first SSB satisfies the first condition, it is determined that the first SSB is the first type SSB; or, if the first SSB satisfies the second condition , it is determined that the first SSB is the SSB of the second type.

In the above solution, the network device can broadcast different types of SSBs, which solves the problem that the network device sets the same type of SSB for all terminal devices, so that the first terminal device can determine the type of the SSB. Therefore, independent SSBs can be provided for different types of terminal devices, so as to meet the communication requirements of various types of terminal devices.

In a possible implementation, the first condition includes: the synchronization signal sequence of the first SSB is the first sequence, and the second condition includes: the synchronization signal sequence of the first SSB is the second sequence, wherein , the first sequence and the second sequence are different synchronization signal sequences. In the above solution, different types of SSBs can be distinguished by different synchronization signal sequences, thereby saving signaling overhead for indicating the types of SSBs.

In a possible implementation, the first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is the first reference signal, and the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB The modulation reference signal is a second reference signal; wherein, the first reference signal and the second reference signal are different demodulation reference signals. In the above solution, the first terminal device can determine the type of the first SSB based on the specific conditions satisfied by the demodulation reference signal of the broadcast channel of the first SSB, thereby saving signaling overhead for indicating the type of the SSB .

In a possible implementation, the initialization parameters of the first reference signal are:

The initialization parameters of the second reference signal are:

in,

is the SSB index (index) or the high r bit value or the low r bit value of the SSB index, where r is a positive integer, for example

is the upper 3-bit value or the lower 3-bit value of the SSB index, and there are 8 different possibilities, so 8 different DMRS sequences can be formed. r(m) is the mth element in the DMRS sequence, where m is an integer. c(n) is the nth element in the sequence c, where n is an integer.

is the ID of the cell where the SSB is located.

The value of can be

Can also be other predefined numbers or with

related numbers.

In a possible implementation, the first condition includes: the scrambling sequence of the broadcast channel of the first SSB is the first scrambling sequence, and the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is the first scrambling sequence. The scrambling sequence is a second scrambling sequence; wherein the first scrambling sequence and the second scrambling sequence are different scrambling sequences.

In the above solution, the first terminal device can determine the type of the first SSB according to the specific conditions satisfied by the scrambling sequence of the broadcast channel of the first SSB, thereby saving signaling overhead for indicating the type of the SSB.

In a possible implementation, the initialization sequence or the initial value of the first scrambling sequence is

The initialization sequence or initial value of the second scrambling sequence is

in,

is the ID of the cell where the SSB is located, and X is a positive integer.

In a possible implementation, the first condition includes: the scrambling rule of the broadcast channel of the first SSB is the first scrambling rule, and the second condition includes: the scrambling rule of the broadcast channel of the first SSB is the first scrambling rule. The scrambling rule is a second scrambling rule; wherein, the first scrambling rule and the second scrambling rule are different scrambling rules. In the above solution, signaling overhead for indicating the type of SSB can be saved.

In a possible implementation, the first scrambling rule is

The second scrambling rule is

where, b(i) represents the value of the i-th bit before scrambling,

Indicates the value of the i-th bit after scrambling, c(n) is the scrambling sequence, c(n) is determined by the cell ID (Cell ID), the value of n is i+v*M _bit , the value of v is Can be a decimal, and/or can be an integer. A new term "+1" is added to the equation of the second scrambling rule, so that the first scrambling rule can be obtained, and the first scrambling rule and the second scrambling rule are different scrambling rules.

In a possible implementation, if it is determined that the first SSB is the SSB of the first type, the method further includes: determining whether there is a second SSB according to the first SSB, wherein the second SSB is the SSB of the first type. the first type SSB or the second type SSB; when the second SSB exists, receive the second SSB from the network device; send the network device to the network according to the first SSB or the second SSB The device initiates random access.

In a possible implementation, the initiating random access to the network device according to the first SSB or the second SSB includes: according to the measurement of the first SSB and the measurement of the second SSB amount to determine the SSB used to access the network device.

In the above solution, the first terminal device selects the SSB with the best or better channel quality according to the measurement amount of the first SSB and the measurement amount of the second SSB. After accessing the network through the SSB, the first terminal device can obtain the system information, after the random access resource is obtained according to the system information, a random access procedure can be performed to improve the efficiency of the first terminal device accessing the network.

In a possible implementation, the method further includes: when the second SSB exists, determining at least one of the following according to the first SSB: the time domain resource location of the second SSB, the second SSB and the synchronization signal sequence of the second SSB. In the above solution, the first terminal device can obtain the information of the second SSB through the first SSB, and the information can be used to receive the information of the second SSB, which saves the power consumption of the first terminal device in searching for the SSB.

In a possible implementation, the time domain resource location of the second SSB is indicated by at least one of the system frame number, time slot and symbol where the second SSB is located, or, the time domain of the second SSB is The domain resource location is indicated by at least one of a system frame number offset, a slot offset, and a symbol offset of the second SSB relative to the first SSB.

In the above solution, the first SSB may be used to indicate the time domain resource location of the second SSB. Specifically, the network device may use a direct indication method (or an absolute indication method), for example, the first SSB indicates at least one of the system frame number, time slot and symbol where the second SSB is located, or the first SSB corresponds to The system information indicates the system frame number of the second SSB, and the first terminal device can obtain the system frame number of the second SSB from the system information. Alternatively, the network device may use an indirect indication method (or a relative indication method), for example, the first SSB may indicate the system frame number offset, time slot offset and symbol offset of the second SSB relative to the first SSB At least one of the first SSB, or the system information corresponding to the first SSB indicates the system frame number offset of the first SSB, and the first terminal device can obtain the system frame number offset of the first SSB and the system frame number offset of the first SSB from the system information. system frame number, so that the system frame number of the second SSB can be determined. The method can save the power consumption of the first terminal device in searching for the second SSB.

In a possible implementation, the first SSB is further used to indicate a period corresponding to the second SSB; or, it is also used to indicate a period corresponding to the second SSB and an effective time corresponding to the period.

In the above solution, the first SSB may also indicate a period corresponding to the second SSB, and the first terminal device may determine the period corresponding to the second SSB through the first SSB, so that the first terminal device may receive the second SSB according to the period. In addition, the first SSB indicates the period corresponding to the second SSB, and also indicates the valid time corresponding to the period. The first terminal device can periodically receive the second SSB within the valid time corresponding to the period, and after the valid time is exceeded , the network device no longer periodically sends the second SSB, or the cycle at which the network device sends the second SSB changes. The method can save the power consumption of the first terminal device in searching for the second SSB.

In a possible implementation, when the second SSB exists, the first SSB is used to indicate configuration information of a downlink control channel, and the control information on the downlink control channel is used to schedule system information. Wherein, the configuration information of the downlink control channel includes at least one of the following: a time domain resource location and a frequency domain resource location. Wherein, the time domain resource location includes at least one of the following: a symbol location, a time slot location, and a frame number.

In a possible implementation, the method further includes: when the second SSB exists, determining the information of the shared channel scheduled by the downlink control information corresponding to the second SSB according to the first SSB. In the above solution, after receiving the first SSB, the first terminal device can obtain the shared channel scheduled by the downlink control information corresponding to the second SSB according to the instruction of the first SSB, and does not need to obtain the second SSB by receiving the second SSB. The shared channel scheduled by the corresponding downlink control information can therefore reduce the overhead of the first terminal device for detecting the scheduling information of the shared channel.

In a second aspect, an embodiment of the present application further provides a method for transmitting a synchronization signal block, including: broadcasting a first SSB; wherein the first SSB is a first type SSB or a second type SSB, and the first type SSB and the second type SSB are different types of SSB; when the first SSB is the first type SSB, the first SSB satisfies the first condition, and when the first SSB is the second type SSB , the first SSB satisfies the second condition.

For the description of the first condition and the second condition, please refer to the first aspect, and details are not repeated here.

In a possible implementation, the method further includes: broadcasting a second SSB, wherein the second SSB is the first type SSB or the second type SSB.

For the introduction of the second SSB, please refer to the first aspect, and details are not repeated here.

In a third aspect, an embodiment of the present application provides an apparatus, and the apparatus may be a terminal device, a device in a terminal device, or a device that can be matched and used with the terminal device. In one configuration, the apparatus may include modules corresponding to one-to-one execution of the methods/operations/steps/actions described in the first aspect, and the modules may be hardware circuits, software, or hardware circuits combined with software. . In one configuration, the apparatus may include a processing module and a transceiver module. Illustratively,

In one possible implementation:

A transceiver module for receiving a first synchronization signal block SSB from a network device, the first SSB is a first type SSB or a second type SSB, and the first type SSB and the second type SSB are different types of SSB ;

a processing module, configured to determine that the first SSB is the SSB of the first type if the first SSB satisfies a first condition; or, if the first SSB satisfies a second condition, determine that the first SSB is the SSB of the first type the second type of SSB.

For the introduction of the first condition and the second condition, please refer to the first aspect, and details are not repeated here.

In one possible implementation:

If it is determined that the first SSB is the first type SSB, the processing module is configured to determine whether there is a second SSB according to the first SSB, wherein the second SSB is the first type SSB or the Type II SSB;

a transceiver module, configured to receive the second SSB from the network device when the second SSB exists;

and a processing module, configured to initiate random access to the network device according to the first SSB or the second SSB.

In a fourth aspect, an embodiment of the present application provides an apparatus, and the apparatus may be a network device, a device in a network device, or a device that can be matched and used with the network device. In one configuration, the apparatus may include modules corresponding to one-to-one execution of the methods/operations/steps/actions described in the second aspect, and the modules may be hardware circuits, software, or hardware circuits combined with software. . In one configuration, the apparatus may include a processing module and a transceiver module. Illustratively,

In one possible implementation:

a processing module for broadcasting the first SSB through the transceiver module;

Wherein, the first SSB is a first-type SSB or a second-type SSB, and the first-type SSB and the second-type SSB are different types of SSB;

When the first SSB is the first type SSB, the first SSB satisfies the first condition,

When the first SSB is the second type of SSB, the first SSB satisfies the second condition.

In one possible implementation:

The processing module is configured to broadcast a second SSB through the transceiver module, wherein the second SSB is the first type SSB or the second type SSB.

In a fifth aspect, an embodiment of the present application provides an apparatus, where the apparatus includes a processor, configured to implement the method described in the foregoing first aspect. Optionally, the apparatus may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect can be implemented. The apparatus may also include a communication interface, which is used for the apparatus to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, a pin or other type of communication interface. The device can be a network device. In one possible device, the apparatus includes:

memory for storing program instructions;

The processor is configured to use the communication interface to perform the steps in the foregoing first aspect, which is not specifically limited here.

In a fifth and sixth aspect, an embodiment of the present application provides an apparatus, where the apparatus includes a processor, configured to implement the method described in the foregoing second aspect. Optionally, the apparatus may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the second aspect above can be implemented. The apparatus may also include a communication interface, which is used for the apparatus to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, a pin or other type of communication interface. The device can be a terminal device. In one possible device, the apparatus includes:

memory for storing program instructions;

The processor is configured to use the communication interface to perform the steps in the foregoing second aspect, which is not specifically limited here.

In a seventh aspect, the embodiments of the present application further provide a computer-readable storage medium, including instructions, which, when executed on a computer, cause the computer to execute the method described in any one of the first aspect to the second aspect.

In an eighth aspect, the embodiments of the present application further provide a computer program product, including instructions, which when run on a computer, cause the computer to execute the method described in any one of the first aspect to the second aspect.

In a ninth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor, and may further include a memory, for implementing the method described in any one of the first aspect to the second aspect. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a ninth aspect, an embodiment of the present application provides a system, where the system includes the device described in the third aspect or the device described in the fifth aspect, and the device described in the fourth aspect or the device described in the sixth aspect .

Description of drawings

1 is a schematic diagram of an interaction flow of a method for transmitting a synchronization signal block provided by an embodiment of the present application;

2 is a schematic diagram of a newly added SSB provided by an embodiment of the present application;

3 is a schematic diagram of a newly added SSB corresponding to SIB1 according to an embodiment of the present application;

4 is a schematic diagram of the relationship between PSS, SSS, and PBCH in the SSB provided by the embodiment of the present application;

FIG. 5 is a schematic flowchart of a REDCAP terminal device accessing a network according to an embodiment of the present application;

6 is a schematic diagram of SIB1 indicating other SSBs and other SIB1s provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of SIB1 indicating absolute time positions of other SSBs according to an embodiment of the present application;

FIG. 8 is a schematic diagram of SIB1 indicating relative time positions of other SSBs according to an embodiment of the present application;

FIG. 9 is a schematic diagram of the composition and structure of a terminal device according to an embodiment of the present application;

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

11 is a schematic structural diagram of an apparatus provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of an apparatus provided by an embodiment of the present application.

detailed description

Embodiments of the present application provide a synchronization signal block transmission method and communication device, which are used to determine multiple types of SSBs, so that one or more types of terminal equipment can access different Type SSB, get better network service, or get better transmission capacity.

The embodiments of the present application will be described below with reference to the accompanying drawings.

The technical solutions provided in the embodiments of this application can be applied to various communication systems, for example, a long term evolution (LTE) system, a 5G mobile communication system, a wireless-fidelity (WiFi) system, a future sixth Generation and other communication systems, or systems integrating multiple communication systems, etc., are not limited in the embodiments of the present application. Among them, the 5G mobile communication system may also be referred to as a new radio (NR) mobile communication system.

The technical solutions provided by the embodiments of this application can be applied to various communication scenarios, for example, can be applied to one or more of the following communication scenarios: eMBB, URLLC, mMTC, device-to-device (device-to-device, D2D) communication , vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, and internet of things (IoT), etc.

A wireless communication system includes communication devices, and air interface resources can be used for wireless communication between the communication devices. The communication devices may include network devices and terminal devices, and the network devices may also be referred to as network-side devices. The air interface resources may include at least one of time domain resources, frequency domain resources, code resources and space resources. In the embodiments of this application, at least one (species) may also be described as one (species) or multiple (species), and the multiple (species) may be two (species), three (species), four (species) ) or more (species), which are not limited in the embodiments of the present application. For example, a wireless communication system includes two communication devices, namely a first communication device and a second communication device, wherein the first communication device may be a network device, and the second communication device may be a terminal device.

In this embodiment of the present application, "/" may indicate that the objects associated before and after are an "or" relationship. For example, A/B can mean A or B. In formula calculation, "/" can represent the division symbol. For example, N/M means N divided by M, where N and M each represent a numerical value. "And/or" can be used to describe the existence of three relationships between associated objects. For example, A and/or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists independently, wherein A and B can be singular or plural. In order to facilitate the description of the technical solutions of the embodiments of the present application, words such as "first", "second", "A", and "B" may be used in the embodiments of the present application to distinguish technical features with the same or similar functions. The words "first", "second", "A", "B" and so on do not limit the quantity and execution order, and the words "first", "second", "A", "B" and so on also Not necessarily different. In the embodiments of the present application, words such as "exemplary" or "such as" are used to represent examples, illustrations or illustrations, and the embodiments or arrangements described as "exemplary" or "for example" should not be construed as More preferred or advantageous than other embodiments or arrangements. The use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner to facilitate understanding.

The terminal device involved in the embodiments of the present application may also be referred to as a terminal, which may be a device with a wireless transceiver function. Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; or can be deployed on water (such as ships, etc.); or can be deployed in the air (such as aircraft, balloons or satellites, etc.). The terminal device may be a user equipment (user equipment, UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function. Exemplarily, the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function. Or the terminal device can be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, intelligent A wireless terminal in a power grid, a wireless terminal in a smart city, or a wireless terminal in a smart home, etc. In this embodiment of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system. The apparatus can be installed in the terminal equipment, or the apparatus can be used in combination with the terminal equipment. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described in detail by taking the device for realizing the function of the terminal device as the terminal device as an example.

In a communication system, such as an NR mobile communication system or other systems, a light terminal device can be introduced relative to a traditional terminal device, such as an eMBB terminal device. The light end device may also be referred to as a reduced capability (REDCAP) end device. The eMBB terminal device may be a terminal device capable of transmitting eMBB services. The REDCAP terminal device may exist in the mMTC scenario, but is not limited to the mMTC scenario, and the mMTC scenario may include, but is not limited to, only the REDCAP terminal device. Compared with the REDCAP terminal equipment, the traditional terminal equipment can be a high-capability terminal or an unrestricted terminal equipment. In this embodiment of the present application, the traditional terminal device can be replaced with a high-capability terminal device introduced in the future, which is relative to the REDCAP terminal device. Exemplarily, the feature comparison of the high-capability terminal and the REDCAP terminal device satisfies at least one of the following first to ninth items.

The first item: the maximum bandwidth supported by the high-capacity terminal device is greater than the maximum bandwidth supported by the REDCAP terminal device. For example, the maximum bandwidth supported by a high-capability terminal device may be 100 megahertz (MHz) or 200MHz, and the maximum bandwidth supported by a REDCAP terminal device may be 20MHz, 10MHz, or 5MHz.

The second item: the number of antennas of high-capacity terminal equipment is more than the number of antennas of REDCAP terminal equipment. The number of antennas may be the number of antennas set for the terminal device, or the maximum number of antennas used for transmission and/or reception. For example, high-capacity terminal equipment supports up to 4 antennas for receiving and 2 antennas for transmission, and REDCAP terminal equipment supports up to 2 antennas for receiving and 1 antenna for transmission. Alternatively, even though the number of antennas of a high-capability terminal device is equal to the number of antennas of a REDCAP terminal device, the capability is different in antenna-selective transmission. For example, both high-capacity terminal devices and low-capacity terminal devices support 2-antenna transmission, but high-capacity terminal devices support antenna selective transmission, while low-capacity terminal devices do not support antenna-selective transmission. Taking single-antenna port data transmission as an example, high-capacity terminal equipment can realize single-antenna port data transmission switching between two transmit antennas, and the data transmission can obtain spatial diversity gain; while single-antenna port data transmission of low-capacity terminal equipment can only Simultaneous transmission on two transmit antennas is equivalent to the transmission performance of one transmit antenna.

Item 3: The maximum transmit power supported by the high-capability terminal equipment is greater than the maximum transmit power supported by the REDCAP terminal equipment. For example, the maximum transmit power supported by a high-capacity terminal device is 23 decibel-milliwatt (dBm) or 26dBm, and the maximum transmit power supported by a REDCAP terminal device is a value between 4dBm and 20dBm.

The fourth item: high-capacity terminal equipment supports carrier aggregation (CA), and REDCAP terminal equipment does not support carrier aggregation.

Item 5: When both high-capacity terminal equipment and REDCAP terminal equipment support carrier aggregation, the maximum number of carriers supported by the high-capacity terminal equipment is greater than the maximum number of carriers supported by the REDCAP terminal equipment. For example, high-capacity terminal equipment supports aggregation of up to 32 carriers or 5 carriers, and REDCAP terminal equipment supports aggregation of up to 2 carriers.

Item 6: High-capability terminal equipment and REDCAP terminal equipment are introduced in different protocol versions. For example, in the NR protocol, a high-capability terminal device is a terminal device introduced in version (release, R) 15 of the protocol, and a REDCAP terminal device is a terminal device introduced in R17 of the protocol.

Item 7: The duplex capabilities of high-capacity terminal equipment and REDCAP terminal equipment are different. High-capacity terminal equipment has greater duplex capability. For example, high-capacity terminal equipment supports full-duplex frequency division duplex (FDD), that is, high-capacity terminal equipment supports simultaneous reception and transmission when it supports FDD, and REDCAP terminal equipment supports half-duplex FDD, that is, REDCAP terminal equipment supports FDD at the same time. Simultaneous reception and transmission are not supported when FDD is supported.

Item 8: The data processing capability of high-capacity terminal equipment is stronger than that of REDCAP terminal equipment. A high-capacity terminal device can process more data in the same time, or a high-capacity terminal device can process the same data in a shorter processing time. For example, denote the time when the terminal device receives the downlink data from the network device as T1, and after the terminal device processes the downlink data, denote the time when the terminal device sends the feedback of the downlink data to the network device as T2, and T2 and T2 of the high-capacity terminal device The time delay (ie time difference) between T1 is smaller than the time delay between T2 and T1 of the REDCAP terminal equipment. The feedback of downlink data may be ACK feedback or NACK feedback.

Item 9: The peak rate of data transmission of high-capacity terminal equipment is greater than the peak rate of data transmission of REDCAP terminal equipment. The data transmission includes uplink data transmission (ie, the terminal device sends data to the network device) and/or downlink data transmission (ie, the terminal device receives data from the network device).

The network device involved in the embodiments of the present application includes a base station (base station, BS), which may be a device deployed in a wireless access network and capable of wirelessly communicating with a terminal device. The base station may have various forms, such as a macro base station, a micro base station, a relay station, or an access point. Exemplarily, the base station involved in the embodiments of the present application may be a base station in a 5G mobile communication system or a base station in LTE, where the base station in the 5G mobile communication system may also be called a transmission reception point (transmission reception point, TRP). or gNB.

In this embodiment of the present application, the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system. The apparatus may be installed in network equipment, or the apparatus may be used in conjunction with network equipment. In the embodiments of the present application, the technical solutions provided by the embodiments of the present application are specifically described by taking the apparatus for implementing the functions of the network equipment as the network equipment as an example.

The technical solutions provided in the embodiments of the present application can be applied to wireless communication between communication devices. The wireless communication between communication devices may include: wireless communication between a network device and a terminal device, wireless communication between a network device and a network device, or wireless communication between a terminal device and a terminal device. Wherein, in this embodiment of the present application, the term "wireless communication" may also be referred to as "communication" for short, and the term "communication" may also be described as "data transmission", "information transmission", "signal transmission" or "transmission". The technical solutions involved in the embodiments of the present application can be used for wireless communication between the scheduling entity and the subordinate entity, wherein the scheduling entity can allocate air interface resources to the subordinate entity. Those skilled in the art can use the technical solutions provided in the embodiments of this application to perform wireless communication between other scheduling entities and subordinate entities, such as wireless communication between a macro base station and a micro base station, such as a first terminal device and a second terminal device wireless communication between. The embodiments of this application are described by taking the communication between a network device and a terminal device as an example.

In this embodiment of the present application, the terminal device may establish a connection between the terminal device and the network device through an initial access process, so as to transmit data with the network device.

In a possible implementation, the main process of initial access of a terminal device (such as a traditional terminal device) includes:

Step a. Detect the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) from the network equipment, thereby receiving the synchronization signal block (synchronization signal band, SSB) from the network equipment, wherein the SSB Including PSS, SSS and physical broadcast channel (physical broadcast channel, PBCH);

Step b, obtain the master information block (master information block, MIB) from the PBCH; if it is determined according to the MIB that the SSB is a cell-defined synchronization signal block (cell-defined SSB, CD-SSB), then determine the public according to the instruction of the MIB. Search space (common search space, CSS) and control resource set (control resource set, CORESET) #0, if it is determined according to the MIB that the SSB is a non-cell defined synchronization signal block (Non-CD-SSB), then according to the Non-CD- The instruction of the SSB searches for the CD-SSB, and determines the CSS and CORESET#0 according to the instruction of the MIB of the searched CD-SSB;

Step c, according to CORESET#0 and CSS to determine the candidate resource for transmitting the physical downlink control channel (physical downlink control channel, PDCCH), the PDCCH carries downlink control information (downlink control information, DCI); in the candidate resources of PDCCH Detecting DCI; after detecting DCI, receive a physical downlink shared channel (PDSCH) according to the scheduling information indicated by the DCI, and the PDSCH carries the system information of the cell (for example, it can be SIB 1 and/or other SIBs), That is, the system information of the cell is obtained according to the indication of the DCI;

Step d, according to the system information, initiate a random access procedure to the network device to establish a connection between the terminal device and the network device.

In this embodiment of the present application, the MIB is used in the above-mentioned initial access process to determine the SSB as CD-SSB, determine CSS and CORESET#0, determine PDCCH according to CORESET#0 and CSS, detect DCI in the candidate resources of PDCCH, and obtain according to DCI The whole process of system information is collectively referred to as "accessing the network through SSB", or "using SSB to access the network", or "using SSB to access the network", or "initially accessing the network through SSB". The process of accessing the network through SSB will be described.

In the embodiment of this application, the MIB of the SSB may indicate the CSS and CORESET#0, the CORESET#0 and the CSS may be used to determine the candidate resources of the PDCCH, and the system information scheduled by the DCI of the PDCCH may be referred to as the system corresponding to the SSB information.

In the above-mentioned initial access process, the network device may send the SSB by using the beamforming technology. In order to accommodate traditional terminal equipment, the shaped beam may be wider and cover a wide area, but the coverage distance is limited. If the wide beam is used for REDCAP terminal equipment, when the REDCAP terminal equipment with lower coverage initiates random access, due to the reciprocity of the uplink and downlink channel environment, the base station cannot detect the uplink signal sent by the RADCAP terminal equipment, or detect The signal is weak, so the wide beam SSB may not be used for random access of REDCAP terminal devices in cell edge or weak coverage scenarios. Due to the different characteristics of different terminal devices (for example, eMBB terminal device and REDCAP terminal device, or URLLC terminal device and REDCAP terminal device, or eMBB terminal device and URLLC terminal device), different terminal devices may require independent SSBs to meet different requirements. The respective needs of the terminal equipment. Further, different terminal devices may also require independent system information (eg, different system information), dedicated access networks, and/or control channels with different performances, etc., to meet the respective requirements of different terminal devices.

Based on the above analysis, an embodiment of the present application proposes a method for transmitting synchronization signal blocks, which is suitable for communication scenarios between network equipment and various types of terminal equipment, and can provide independent SSBs for different types of terminal equipment, thereby satisfying various Types of terminal equipment communication needs. Among them, the independent SSB means that the network equipment broadcasts the SSB that each terminal equipment needs to use for different types of terminal equipment.

In this embodiment of the present application, terminal devices with multiple capability types may be included according to different capabilities of the terminal device. For example, two types of terminal devices of different types may be represented by Type A terminal devices and Type B terminal devices. For example, a type A terminal device may be a terminal device for an industrial wireless sensor network (IWSN), and a type B terminal device may be a terminal device for video surveillance (video surveillance).

For example, a type A terminal device may be a mMTC terminal device or a REDCAP terminal device, and a type B terminal device may be an eMBB terminal device. For example, a type A terminal device may be a low capability terminal device, and a type B terminal device may be a high capability terminal device. For example, a type A terminal device may be a REDCAP terminal device A, and a type B terminal device may be a REDCAP terminal device B, wherein the REDCAP terminal device A and the REDCAP terminal device B have different one or more of the following capabilities: bandwidth capability, Number of antennas, transmit power, CA capability, duplex capability, and data processing capability. For example, a type A terminal device may be a terminal device for an industrial wireless sensor network, and a type B terminal device may be a terminal device for video surveillance and/or an enhanced mobile broadband (eMBB) terminal device.

In the embodiments of the present application, for convenience of description, two types of traditional terminal equipment and REDCAP terminal equipment may be used as examples to describe the corresponding technical solutions. For the processing methods of other types of terminal equipment to SSB, refer to the processing methods of traditional terminal equipment and REDCAP terminal equipment to SSB.

In this embodiment of the present application, on the basis that a network device can only broadcast one kind of SSB, another newly added SSB can also be broadcast. For example, network equipment can transmit the newly added SSB using a narrower beam, so the SSB can cover a longer distance. Optionally, the terminal device does not perceive which beam width the network device uses to transmit the SSB. For example, the newly added SSB can be used exclusively for REDCAP terminal equipment to access the network, and the process of accessing the network through the SSB is described in the foregoing description. REDCAP terminal equipment can receive SSB and obtain system information. Optionally, the newly added SSB cannot be correctly interpreted by the traditional terminal equipment, so that the newly added SSB does not affect the traditional terminal equipment. Among them, the traditional terminal equipment cannot correctly interpret the SSB means that the traditional terminal equipment cannot search for the SSB, or the traditional terminal equipment cannot interpret the information carried by the SSB, or the traditional terminal equipment can obtain the information carried by the SSB, but cannot correctly parse the information the meaning indicated.

Please refer to FIG. 1 , which is a schematic diagram of an interaction flow between a network device and a terminal device according to an embodiment of the present application. The interaction process mainly includes the following steps:

101. The network device broadcasts the first SSB.

Wherein, the first SSB is the first type SSB or the second type SSB; when the first SSB is the first type SSB, the first SSB satisfies the first condition, and when the first SSB is the second type SSB, the first SSB satisfies the second condition condition. The first type SSB and the second type SSB are different types of SSB.

The network device may manage one or more (eg, 2, 3, or 6, etc.) cells, and the first terminal device may communicate with the network device in at least one of the cells (eg, 1 or 2 cells). Taking the at least one cell as the first cell as an example, the network device may broadcast the first SSB in the first cell, and the first terminal device may search for the first SSB in the first cell. For example, the first terminal device acquires the SSB by detecting the PSS and the SSS on the frequency point specified in the protocol or on the frequency point where the SSB may exist.

In this embodiment of the present application, the network device may send multiple different types of SSBs, for example, the network device may send the first type SSB and the second type SSB, where the first type SSB and the second type SSB are different types of SSB. It is not limited that the network device may also send more types of SSBs, for example, the network device may send the third type of SSB and the fourth type of SSB.

In this embodiment of the present application, the first type of SSB and the second type of SSB are different types of SSB. Different types of SSBs can be implemented in multiple ways, for example, different types of SSBs can be distinguished according to the beam ranges corresponding to the SSBs, or different types of SSBs can be distinguished according to the transmit powers corresponding to the SSBs. Wherein, distinguishing different types of SSBs according to the beam ranges corresponding to the SSBs can also be described as: distinguishing different types of SSBs according to the antenna ports corresponding to the SSBs.

For example, the first terminal device and the second terminal device are different types of terminal devices, the first type of SSB is an SSB that can be correctly interpreted by the first terminal device, and the first type of SSB is an SSB that cannot be correctly interpreted by the second terminal device. Type 2 SSBs are SSBs that can be correctly interpreted by the second terminal device, and Type 2 SSBs are SSBs that cannot be correctly interpreted by the first terminal device, or Type 2 SSBs are SSBs that can be correctly interpreted by both the second terminal device and the first terminal device SSB. For convenience of description, the type of the first terminal device may be described as the first type, and the type of the second terminal device may be described as the second type.

In this embodiment of the present application, when the network device generates the first SSB, the network device may determine the type of the first SSB. For example, when the network device determines that the first SSB is a first-type SSB, the first SSB generated by the network device satisfies the first condition, and when the network device determines that the first SSB is a second-type SSB, the first SSB generated by the network device satisfies the second condition . The first condition and the second condition are conditions set according to the SSB type to be sent by the network device, and there is a one-to-one correspondence between different conditions and the SSB type. It should be noted that the first SSB and the first type of SSB are different concepts, the first SSB is used to specifically refer to one or some SSBs, and the first type of SSB refers to an SSB type that meets certain characteristics. Similarly, the second SSB and the second type of SSB are different concepts, the second SSB is used to specifically refer to one or some SSBs, and the second type of SSB refers to an SSB type that meets certain characteristics.

In this embodiment of the present application, the network device broadcasts the first SSB. The first terminal device receives the first SSB, and then the first terminal device can use the first SSB to synchronize with the network device, and initiate initial access to the network device according to the first SSB. For the process of accessing the network through the SSB, please refer to the foregoing description. The first SSB may be an SSB that can be correctly interpreted by the first terminal device, and at the same time the first SSB may be an SSB that cannot be correctly interpreted by the second terminal device. Therefore, according to the type of SSB, different types of terminal devices handle SSBs can be different.

102. The first terminal device receives a first synchronization signal block SSB from a network device, where the first SSB is a first type SSB or a second type SSB.

Wherein, the first type SSB and the second type SSB are different types of SSB.

103. If the first SSB satisfies the first condition, the first terminal device determines that the first SSB is an SSB of the first type. or,

104. If the first SSB satisfies the second condition, the first terminal device determines that the first SSB is an SSB of the second type.

Wherein, after the first terminal device receives the first SSB from the network device, the first terminal device determines the type of the first SSB according to the conditions met by the first SSB, for example, the first SSB meets the first condition, and executes the foregoing steps 103. For example, if the first SSB satisfies the second condition, the foregoing step 104 is performed.

In some embodiments of the present application, the first condition includes: the synchronization signal sequence of the first SSB is the first sequence, and the second condition includes: the synchronization signal sequence of the first SSB is the second sequence, wherein the first sequence and the first sequence The two sequences are different synchronization signal sequences.

Specifically, the first condition and the second condition may be conditions set according to different synchronization signal sequences. For example, the first condition includes that the synchronization signal sequence of the first SSB is the first sequence, and the second condition includes that the synchronization signal sequence of the first SSB is the second sequence. The first sequence and the second sequence are different synchronization signal sequences. Therefore, when the network device determines that the first SSB is the first type of SSB, the network device can set the synchronization signal sequence of the first SSB as the first sequence, and when the network device determines that the first SSB is the second type of SSB, the network device can set the first SSB The synchronization signal sequence is the second sequence.

Specifically, in some embodiments of the present application, the synchronization signal sequence of the first SSB may include: the first PSS or the first SSS. For example, if the first PSS of the first SSB is the first sequence, the first SSB satisfies the first condition, the first SSB can be correctly interpreted by the first terminal device, and the first PSS of the first SSB is the second sequence, Then the first SSB satisfies the second condition, and the first SSB cannot be correctly interpreted by the first terminal device. For another example, the first SSS of the first SSB is the first sequence, the first SSB can be correctly interpreted by the first terminal device, the first SSS of the first SSB is the second sequence, and the first SSB cannot be correctly interpreted by the first terminal device. . Therefore, in this embodiment of the present application, different types of SSBs can be distinguished by different synchronization signal sequences. For example, if the first type of SSB is an SSB that the first terminal device can correctly interpret, the first terminal device can access the network through the first SSB, and the process of accessing the network through the SSB is described in the foregoing description.

In some embodiments of the present application, the first condition includes: a demodulation reference signal (DMRS) of the broadcast channel of the first SSB is the first reference signal, and the second condition includes: the broadcast of the first SSB The demodulation reference signal of the channel is the second reference signal;

The first reference signal and the second reference signal are different demodulation reference signals.

Specifically, the first condition and the second condition may be conditions set according to different demodulation reference signals of the broadcast channel. For example, the first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is the first reference signal, and the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB is the second reference signal. Therefore, when the network device determines that the first SSB is the first type of SSB, the network device can set the demodulation reference signal of the broadcast channel of the first SSB as the first reference signal. When the network device determines that the first SSB is the second type of SSB, the network device The demodulation reference signal of the broadcast channel of the first SSB may be set as the second reference signal. The first terminal device can determine the type of the first SSB according to the specific conditions satisfied by the demodulation reference signal of the broadcast channel of the first SSB.

In some embodiments of the present application, the first condition includes: the scrambling sequence of the broadcast channel of the first SSB is the first scrambling sequence, and the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is the second scrambling sequence scrambling sequence;

Wherein, the first scrambling sequence and the second scrambling sequence are different scrambling sequences.

Specifically, the first condition and the second condition may be conditions set according to different scrambling sequences of broadcast channels. For example, the first condition includes: the scrambling sequence of the broadcast channel of the first SSB is the first scrambling sequence, The second condition includes: the scrambling sequence of the broadcast channel of the first SSB is the second scrambling sequence. Therefore, when the network device determines that the first SSB is the first type SSB, the network device can set the scrambling sequence of the broadcast channel of the first SSB as the first scrambling sequence. When the network device determines that the first SSB is the second type SSB, the network device The scrambling sequence of the broadcast channel of the first SSB may be set as the second scrambling sequence. The first terminal device can determine the type of the first SSB according to the specific conditions satisfied by the scrambling sequence of the broadcast channel of the first SSB.

For example, the first condition includes: the broadcast channel of the first SSB adopts the first scrambling sequence, and at this time the first SSB satisfies the first condition, and the first terminal device determines that the first SSB is the first type SSB, the first type SSB is an SSB that can be correctly interpreted by the first terminal device, then the first terminal device can access the network through the first SSB. For the process of accessing the network through the SSB, please refer to the foregoing description. The second condition includes: the broadcast channel of the first SSB adopts the second scrambling sequence, and at this time, the first SSB satisfies the second condition, and the first terminal device determines that the first SSB is the second type SSB, and the second type SSB is the first terminal If the device cannot correctly interpret the SSB, the first terminal device cannot access the network through the first SSB. For the process of accessing the network through the SSB, please refer to the foregoing description. Therefore, in this embodiment of the present application, different types of SSBs can be distinguished by different demodulation and scrambling sequences.

In some embodiments of the present application, in addition to performing the foregoing step 101, the method for transmitting a synchronization signal block performed by the network device may further include the following steps:

The network device broadcasts a second SSB, where the second SSB is a first type SSB or a second type SSB.

Wherein, in addition to broadcasting the first SSB, the network device may also broadcast the second SSB.

In some embodiments of the present application, in addition to performing the foregoing steps 102 and 103 by the first terminal device, the method for transmitting a synchronization signal block performed by the first terminal device may further include the following steps:

If it is determined that the first SSB is a first-type SSB, the first terminal device determines whether there is a second SSB according to the first SSB, where the second SSB is a first-type SSB or a second-type SSB;

When the second SSB exists, the first terminal device receives the second SSB from the network device;

The first terminal device initiates random access to the network device according to the first SSB or the second SSB.

The first terminal device receives the first SSB, and if it is determined that the first SSB is the first type of SSB, the first terminal device determines whether there is a second SSB according to the first SSB. The device receives the second SSB. For example, the system information corresponding to the first SSB is used to indicate whether there is a second SSB, and the first terminal device may determine whether the network device sends the second SSB according to the system information corresponding to the first SSB. For another example, the first terminal device can determine whether there is a second SSB according to the indication information carried in the first SSB. The payload in the PBCH, or the DMRS of the PBCH determines whether there is a second SSB. When the second SSB exists, the first terminal device receives the second SSB from the network device, and the first terminal device initiates random access to the network device according to the first SSB or the second SSB, that is, the first terminal device can access the network device through the first SSB. access the network through the second SSB, or the first terminal device can access the network through the second SSB, and the process of accessing the network through the SSB is described in the foregoing description. In this embodiment of the present application, the frequency domain positions of the first SSB and the second SSB may be the same or different, which is not limited in this embodiment of the present application.

Further, in some embodiments of the present application, the first terminal device initiates random access to the network device according to the first SSB or the second SSB, including:

The first terminal device determines the SSB for accessing the network device according to the measurement amount of the first SSB and the measurement amount of the second SSB.

Wherein, when the first terminal device selects to use the first SSB or the second SSB for random access, the first terminal device may select the SSB according to the measurement of different SSBs. For example, the first terminal device selects the SSB according to the measurement of the first SSB and the measurement of the second SSB. Wherein, the measurement quantity of the SSB may include the reference signal receiving power (reference signal receiving power, RSRP) of the SSB, or the reference signal receiving quality (reference signal receiving quality, RSRQ). The first terminal device selects the SSB with the best or better channel quality according to the measurement amount of the first SSB and the measurement amount of the second SSB. After accessing the network through the SSB, the first terminal device can obtain system information. According to the system After the random access resource is obtained from the information, a random access procedure may be performed to improve the efficiency of the first terminal device accessing the network.

The random access procedure provided by the embodiment of the present application may include: a four-step random access procedure and a two-step random access procedure. For example, the four-step random access process includes:

Step 11: The first terminal device sends a preamble sequence to the network device. The first terminal device calculates a wireless network temporary identifier (random access-radionetwork temporary identifier, RA-RNTI) according to the time-frequency resource for sending the preamble.

Step 12: After detecting the preamble, the network device calculates the same RA-RNTI as in step 11, and sends a random access response to the first terminal device.

Step 13, the first terminal device receives the random access response, if the preamble indicated by the preamble identifier in the random access response is the same as the preamble sent by the first terminal device to the network device in step 11, then the first terminal device considers that this is the same. The random access response is a random access response for itself. After receiving the random access response, the first terminal device sends an uplink message on the allocated uplink resource according to its instruction.

Step 14: The network device receives the uplink message from the first terminal device, and returns a conflict resolution message to the first terminal device that has successfully accessed. The control information of the conflict resolution message is scrambled with a cell-radio network temporary identifier (C-RNTI). The first terminal device that fails to access will re-initiate random access.

For example, the two-step random access process includes:

Step 21: The first terminal device sends the preamble and data to the network device, the data may include the identifier of the first terminal device, and the first terminal device calculates the RA-RNTI according to the time-frequency resources for sending the preamble.

Step 22: The network device sends a random access response to the first terminal device. The network device calculates the same RA-RNTI as in step 21, and uses the RA-RNTI to scramble the control information of the random access response. The random access response includes the unique identifier of the first terminal device to designate the first terminal device that has successfully accessed, while other first terminal devices that have not successfully accessed will re-initiate random access. The random access response further includes the C-RNTI allocated to the first terminal device.

The network device indicates at least one of the following through the first SSB: the time domain resource location of the second SSB, the frequency domain resource location of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB.

Correspondingly, in some embodiments of the present application, in addition to performing the foregoing steps 102 and 103 by the first terminal device, the method for transmitting the synchronization signal block performed by the first terminal device may further include the following steps:

When the second SSB exists, the first terminal device determines at least one of the following according to the first SSB: the time domain resource location of the second SSB, the frequency domain resource location of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB .

The first SSB may be used to indicate the time domain resource location of the second SSB, or the first SSB may also be used to indicate the frequency domain resource location of the second SSB, or the first SSB may also be used to indicate the synchronization of the second SSB Configuration information for the signal sequence. Alternatively, the first SSB may also be used to indicate the time domain resource location of the second SSB and the frequency domain resource location of the second SSB, or the first SSB may also be used to indicate the time domain resource location of the second SSB and the second SSB resource location. The configuration information of the synchronization signal sequence, or the first SSB can also be used to indicate the frequency domain resource location of the second SSB and the configuration information of the synchronization signal sequence of the second SSB, or the first SSB can also be used to indicate the timing of the second SSB. The frequency domain resource location and the configuration information of the synchronization signal sequence of the second SSB.

For example, in this embodiment of the present application, at least one of the following may be directly indicated by the first SSB: the time domain resource location of the second SSB, the frequency domain resource location of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB. Or, the first SSB indicates configuration information of a control channel, the control channel carries control information, the control information is used to schedule system information corresponding to the first SSB, and the control information is also used to indicate at least one of the following: The time domain resource location, the frequency domain resource location of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB. Alternatively, in this embodiment of the present application, the first SSB may be indirectly indicated (for example, the system information corresponding to the first SSB may be used to indicate) at least one of the following: the time domain resource location of the second SSB, the frequency domain resource of the second SSB location, and configuration information of the synchronization signal sequence of the second SSB. In some embodiments of the present application, the first terminal device can obtain the time-frequency domain resource location of the second SSB through the first SSB, and can also obtain the configuration information of the synchronization signal sequence of the second SSB, so that the first terminal device can After receiving the second SSB from the network device, after the first terminal device is synchronized with the first SSB, the first terminal device can obtain the second SSB and its corresponding system information without searching for the synchronization signal again, saving the first terminal device searching Energy consumption of SSB and blind detection DCI.

Further, in some embodiments of the present application, the time domain resource location of the second SSB is indicated by at least one of the system frame number, time slot and symbol where the second SSB is located, or,

The time-domain resource location of the second SSB is indicated by at least one of a system frame number offset, a slot offset, and a symbol offset of the second SSB relative to the first SSB.

The first SSB may be used to indicate the time domain resource location of the second SSB. Specifically, the network device may use a direct indication method (or an absolute indication method), for example, the first SSB indicates at least one of the system frame number, time slot and symbol where the second SSB is located, or the first SSB corresponds to The system information indicates the system frame number of the second SSB, and the first terminal device can obtain the system frame number of the second SSB from the system information. In the same way, the first terminal device can also obtain the time slot and symbol of the second SSB from the system information. In this embodiment of the present application, the first terminal device may determine the time domain resource location of the second SSB according to the system frame number, time slot, and symbol where the second SSB is located.

Alternatively, the network device may use an indirect indication method (or a relative indication method), for example, the first SSB may indicate the system frame number offset, time slot offset and symbol offset of the second SSB relative to the first SSB At least one of the system information of the first SSB, or the system information corresponding to the first SSB indicates at least one of the system frame number offset, time slot offset and symbol offset of the second SSB relative to the first SSB. The system frame number of one SSB and the offset of the second SSB relative to the system frame number of the first SSB determine the system frame number of the second SSB. In the same way, the first terminal device can also determine the time slot and symbol of the second SSB. In this embodiment of the present application, the first terminal device may determine the time of the second SSB by using the time domain resource location of the first SSB, and the system frame number offset, time slot offset, and symbol offset of the second SSB relative to the first SSB. Domain resource location.

Specifically, the frequency domain resource location of the second SSB can be indicated by an absolute or relative global synchronization channel number (global synchronization channel number, GSCN) number, and the positional relationship between the GSCN number and the SSB start frequency point is indicated by the following Table 1. The frequency-domain resource location may also be indicated by an absolute frequency point or a relative offset, for example, indicating the start frequency difference between the second SSB and the first SSB, and the unit of the frequency difference is Hertz (Hz).

The configuration information of the synchronization signal sequence of the second SSB may be represented by the sequence number (or index, identification) of the sequence pattern. For example, the protocol may specify T1 candidate sequence patterns and T1 sequence numbers corresponding to the T1 candidate sequence patterns, where T1 is an integer greater than or equal to 2, and the T1 candidate sequence patterns and the T1 sequence numbers are one-to-one. correspondingly. The configuration information of the synchronization signal sequence of the second SSB may indicate one of the sequence numbers from the T1 sequence numbers. According to the one sequence number, the synchronization signal sequence pattern of the second SSB can be determined.

Table 1

Among them, * represents the multiplication operation.

In some embodiments of the present application, the first SSB is further used to indicate a period corresponding to the second SSB; or, it is also used to indicate a period corresponding to the second SSB and an effective time corresponding to the period.

Wherein, the first SSB may also indicate the period corresponding to the second SSB, then the network device may send the second SSB according to the period corresponding to the second SSB, and the first terminal device may determine the period corresponding to the second SSB through the first SSB, thereby The first terminal device can receive the second SSB according to the period, thereby realizing the purpose of periodically sending the second SSB.

In addition, if the first SSB indicates the period corresponding to the second SSB, and also indicates the valid time corresponding to the period, the network device may periodically send the second SSB within the valid time corresponding to the period, and the first terminal device may The second SSB is periodically received within a valid period corresponding to the period. After the valid time is exceeded, the network device no longer periodically sends the second SSB, or the cycle at which the network device sends the second SSB changes. Similarly, after the valid time is exceeded, the first terminal device will no longer receive the second SSB periodically, or the first terminal device will no longer receive the second SSB according to the aforementioned indication information, so as to avoid the network device from sending the second SSB multiple times. The power consumption caused by the second SSB, and the power consumption caused by the first terminal device receiving the second SSB multiple times.

The network device uses the first SSB to indicate the information of the shared channel scheduled by the downlink control information corresponding to the second SSB.

When the second SSB exists, the first terminal device determines the information of the shared channel scheduled by the downlink control information corresponding to the second SSB according to the first SSB.

In this embodiment of the present application, the network device uses the first SSB to indicate the shared channel scheduled by the downlink control information corresponding to the second SSB, so that after receiving the first SSB, the first terminal device can directly obtain the second SSB according to the instruction of the first SSB. For the shared channel scheduled by the downlink control information corresponding to the SSB, it is no longer necessary to obtain the shared channel scheduled by the downlink control information corresponding to the second SSB by receiving the second SSB, so the overhead of detecting the scheduling information of the shared channel by the first terminal device can be reduced.

In order to facilitate better understanding and implementation of the above solutions in the embodiments of the present application, specific descriptions are given below by taking corresponding application scenarios as examples. The implementation details described in this scenario may be used in combination with the above method embodiments.

In the embodiment of this application, the network device is a base station, the first terminal device is a REDCAP terminal device, and the second terminal device is a traditional terminal device (Legacy terminal device) as an example. On the basis of the current SSB, the base station newly adds a dedicated REDCAP terminal device. The newly added SSB corresponds to the narrow beam, and the REDCAP terminal equipment can correctly interpret the newly added SSB, but the traditional terminal equipment cannot correctly interpret the newly added SSB. The base station can also add indication information to the system information corresponding to the traditional SSB, so that the REDCAP terminal device can receive the narrow beam with low power consumption and obtain the system information carried by it.

In the following, two embodiments are respectively used for description.

Example 1

The embodiment of the present application provides a newly added SSB that cannot be interpreted correctly by traditional terminal equipment. If the newly added SSB enables traditional terminal equipment to access the network according to the current rules, it will cause confusion in time alignment, because the traditional terminal equipment receives a After the SSB, the time position of the SSB will be determined according to the rules defined by the traditional protocol, and then the clock will be aligned with the base station. Therefore, in order not to change the processing method of the SSB by the traditional terminal device, the solutions of the embodiments of the present application should prevent the traditional terminal device from correctly interpreting the newly added SSB.

2 is a schematic diagram of a newly added SSB provided by an embodiment of the present application. The beams marked as SSB-1 to SSB-4 are beams corresponding to SSB indexes 1-4 defined by the current protocol, and SSB-1 to SSB -4 forms an SSB set (burst), and all SSBs in the SSB set are sent within 5 milliseconds (ms). In the vacant time slots (slots) or symbols in the same SSB aggregation period, newly added SSBs can be arranged. For example, SSB-1', SSB-1", SSB-2', and SSB-4' in Figure 2 are The beam corresponding to the newly added SSB. Among them, the number of the SSB is only an example, and the relationship with the current SSB index may not be limited. For the convenience of description, the two newly added beams close to the traditional SSB-1 are named SSB respectively. -1', SSB-1", the two beams close to the traditional SSB-2, SSB-4 are named SSB-2', SSB-4'.

FIG. 3 is a schematic diagram of a newly added SSB corresponding to SIB1 according to an embodiment of the present application. It can be seen from the foregoing that there are multiple types of SSBs, such as a first-type SSB and a second-type SSB, wherein the second-type SSB is Traditional SSB, the first type SSB is the newly added SSB, and each traditional SSB or newly added SSB has a corresponding SIB1, for example, the first type SSB corresponds to the first type SIB1, and the second type SSB corresponds to the second type SIB1, wherein , the information in the second type SIB1 can be received by traditional terminal equipment or REDCAP terminal equipment, the information in the first type SIB1 can only be received by REDCAP terminal equipment, and the information in the first type SIB1 cannot be received by traditional terminal equipment.

In the embodiment of the present application, the second type of SSB is a traditional SSB and the first type of SSB is a newly added SSB as an example for description, and this scenario does not constitute a limitation on the embodiment of the present application. For example, the first type SSB and the second type SSB in the embodiment of the present application may be the other two types of SSBs, for example, the other two newly added types of SSBs. Moreover, whether the SSB type is newly added or existing does not constitute a limitation on this embodiment of the present application. The methods in the embodiments of the present application are mainly aimed at two types of SSBs.

In a possible implementation, the process that the REDCAP terminal device searches for the SSB until it obtains the MIB information mainly includes the following processes:

Step 1: The terminal device determines a frequency point among the frequency points where the SSB may exist, blindly detects the PSS symbol by symbol in the time domain, and then blindly detects the SSS after detecting the PSS. In the absence of a priori information, the terminal device will search for time-domain symbols one by one until a synchronization signal is found. If the terminal equipment does not search for a synchronization signal for a long period of time (for example, more than 80ms) on one frequency point, it switches to another frequency point where SSB may exist, and detects the synchronization signal in the same way. If the synchronization signal is detected, the cell identifier (Cell ID) is calculated according to the identifier (ID) represented by the patterns of the PSS and SSS.

Step 2: The terminal device detects the PSS and SSS, and the PSS, SSS and PBCH satisfy the relationship shown in Figure 4. The terminal device receives the payload carried on the PBCH. The payload carried by the PBCH is scrambled by a sequence, and the There are DMRS sequences. As shown in Table 2, the time-frequency positions where the DMRS on the PBCH is located are illustrated. The generation method of the DMRS sequence r(m) is:

c(n)=(x ₁ (n+ _NC )+x ₂ (n+ _NC ))mod 2,

_NC = 1600,

x ₁ (n+31)=(x ₁ (n+3)+x ₁ (n))mod 2,

x ₂ (n+31)=(x ₂ (n+3)+x ₂ (n+2)+x ₂ (n+1)+x ₂ (n))mod 2.

Among them, the initialization parameter of c(n) is

is the upper 3-bit value or the lower 3-bit value of the SSB index, and there are 8 different possibilities, so 8 different DMRS sequences can be formed. r(m) is the mth element in the DMRS sequence, where m is an integer, c(n) is the nth element in the sequence c, n is an integer,

is the ID of the cell where the SSB is located. When demodulating a DMRS sequence, the terminal device can try various possible sequences one by one until a DMRS sequence is confirmed.

Table 2

Step 3: The terminal device performs channel estimation according to the DMRS, decodes the PBCH according to the channel estimation result, and then descrambles the decoded PBCH according to the PBCH scrambling code, so as to obtain the load of the PBCH, and then obtain the information carried on the load. The scrambling rules for PBCH can be

in,

is the bit after scramble, b(0),...,b(M _bit -1) is the bit before scramble, c(n) is the scramble sequence, which is calculated by the following formula.

c(n)=(x ₁ (n+ _NC )+x ₂ (n+ _NC ))mod 2,

x ₁ (n+31)=(x ₁ (n+3)+x ₁ (n))mod 2,

x ₂ (n+31)=(x ₂ (n+3)+x ₂ (n+2)+x ₂ (n+1)+x ₂ (n))mod 2,

_NC = 1600,

Wherein, the value of v may be a decimal and/or may be an integer.

In this embodiment of the present application, the base station can broadcast the newly added SSB, so that the traditional terminal equipment cannot correctly interpret the newly added SSB, and the REDCAP terminal equipment can interpret the newly added SSB. Four. There are many ways to implement the newly added SSB. Examples are as follows:

An implementation manner of the newly added SSB may be that the base station changes the synchronization sequence of the PSS and/or SSS sent, and in this embodiment of the present application, a new synchronization sequence may be set for the newly added SSB, so that traditional terminal equipment cannot use the new synchronization sequence. The synchronization sequence is synchronized with the base station, so the newly added SSB cannot be received.

An implementation manner of the newly added SSB may be that the base station may set a new DMRS sequence of the PBCH for the newly added SSB, so that the traditional terminal equipment cannot recognize the new DMRS sequence. For example, change the initialization parameters of the above DMRS sequence. For example, add the following item to the initialization parameter of the above c(n)

Its value can be

Can also be other predefined numbers or with

related numbers. The initialization parameters of c(n) can be:

Through this method, the REDCAP terminal equipment can detect the DMRS sequence and determine the

Further, the index of the newly added SSB is determined. The traditional terminal equipment cannot correctly identify the new DMRS sequence, and thus cannot correctly demodulate the PBCH, and thus cannot obtain the MIB in the SIB.

It can be understood that in the embodiment of the present application, the right side of the above c _int equation is

It is just an example that can be implemented, and it is not limited,

It can also be replaced with other parameters, such as replacing with division

and

Values other than , for example, can be replaced by

For another example, the base station may set a new scrambling sequence for the PBCH, so that the traditional terminal equipment cannot descramble the payload of the PBCH. A feasible way is to add a scrambling code sequence, for example, adding the scrambling code in the above PBCH

change into

X is a positive integer. Another feasible way is to modify the scrambling rules. For example, in the above method, the scrambling rules are

The following new scrambling rules are adopted in the embodiment of the present application:

i.e. in

A new term "+1" is added to the right side of the equation of . Or both ways are used to set a new scrambling sequence.

In the above example, the REDCAP terminal equipment can use the new scrambling sequence to correctly descramble the payload of the PBCH and obtain the MIB carried by it, while the traditional terminal equipment cannot correctly descramble the PBCH and thus cannot obtain the MIB.

In the current technology, all terminal devices use the same set of rules to search the SSB and obtain system information. If this rule is still used, both terminal devices will be able to access the newly added SSB. The access of the traditional terminal equipment to the newly added SSB will cause clock alignment confusion. Through the solution of the first embodiment, the traditional terminal device cannot correctly interpret the newly added SSB. Embodiment 1 By adopting a new synchronization sequence, a new DMRS sequence, a new scrambling sequence, etc., the traditional terminal equipment cannot correctly interpret the newly added SSB, and the REDCAP terminal equipment can New scrambling sequences, etc., correctly interpret the newly added SSB. It achieves the purpose that traditional terminal equipment cannot access from the newly added SSB, while the REDCAP terminal equipment can access from the newly added SSB according to the new rules.

Embodiment 2

In the embodiment of the present application, since the beam used by the newly added SSB and the time position can be realized by the base station, there is uncertainty. For example, only one or more newly added SSBs will exist in part of the period of the SSB. The optimal or better narrowband SSB may not be retrieved in the cycle. Therefore, when a REDCAP terminal device accesses the network from an existing SSB or a new SSB, the base station can broadcast the indication information, so that the REDCAP terminal device can detect one or more new SSB beams near the current SSB beam with low energy consumption. increased SSB.

As shown in FIG. 5 , the REDCAP terminal device access network process provided by the embodiment of the present application takes the second type of SSB as a traditional SSB and the first type of SSB as a newly added SSB as an example, including:

Step 1: The REDCAP terminal device searches the SSB symbol by symbol, synchronizes with an SSB, and obtains system information through the SSB. An optional way is that the REDCAP terminal device can scan multiple SSBs in the SSB cycle, select an SSB with the largest or larger received power, and read the information of the SSB, for example, read the index of the SSB. , and/or read the SIB1 corresponding to the SSB. If the SSB received or selected by the REDCAP terminal device is a traditional SSB, go to step 2-1, otherwise go to step 2-2.

Step 2-1: The REDCAP terminal device reads the SIB1 corresponding to the SSB, which includes system information sent to the REDCAP terminal device. The system information may include other SSB information related to the SSB, such as other SSBs near an SSB beam. The system information may also include random access resource information. The terminal device can determine whether it is necessary to detect other SSBs according to the received power of the SSBs searched in step 1. The embodiments of the present application do not limit the method for detecting SSBs by the terminal device. If the REDCAP terminal device determines that random access is initiated from the traditional SSB, it will jump to step 6-2. If the REDCAP terminal device determines that it needs to detect other SSBs, go to step 3-1.

Step 3-1: The REDCAP terminal device determines whether the vicinity of the traditional SSB corresponds to the newly added SSB according to the received indication of SIB1. If there is no corresponding new SSB, go to step 6-2. Otherwise, go to step 4-1.

Step 4-1: The REDCAP terminal device receives the newly added SSB at the corresponding time-frequency position according to the instruction of SIB1, and detects its key indicators, such as detecting RSRP. Skip to step 5.

Step 2-2: When the SSB received or selected by the REDCAP terminal device is a newly added SSB, it reads the newly added SIB1 corresponding to the newly added SSB, and the newly added SIB1 may include other traditional SSB information related to the newly added SSB , such as other legacy SSBs in the vicinity of the newly added SSB beam. The REDCAP terminal device can determine whether it needs to detect other SSBs or traditional SSBs according to the received power of the searched SSB. If the REDCAP terminal device determines that random access is initiated from the traditional SSB, it will jump to step 6 -2. If it is determined that it is necessary to detect other SSBs or traditional SSBs, go to step 3-2.

Step 3-2: The REDCAP terminal device receives other SSBs or traditional SSBs at the corresponding time position according to the instruction of the newly added SIB1, and detects its key indicators, such as RSRP. Then go to step 5.

Step 5: The REDCAP terminal device determines whether the reception performance of the newly added SSB is better than that of the traditional SSB. If yes, go to step 6-1. Otherwise skip to step 6-2.

Step 6-1: The REDCAP terminal device initiates random access from the newly added SSB. The newly added SIB1 corresponds to a random access opportunity (PRACH occasion, RO), and the RO is used to send message 1 or message A (Msg1/MsgA).

Step 6-2: The REDCAP terminal device initiates random access from the traditional SSB. The traditional SIB1 corresponds to an RO, and the RO is used to send Msg1/MsgA.

It should be noted that, in the above steps 2-1 and 2-2, the SIB1 of a traditional SSB or a newly added SSB may include other traditional SSB and/or related information of the newly added SSB related to the SSB, such as Whether other SSBs in the vicinity of the SSB beam exist, and when other SSBs exist, determine the time-frequency positions where these SSBs exist. In this embodiment, the other SSBs are SSBs relative to the currently received SSBs. As shown in FIG. 6 , the current SIB1 indicates other SSBs and other SIB1s. The first SSB schedules the current SIB1 and the second SSB schedules other SIBs. SIB1.

In a possible implementation, if the other SSBs and the current SSB are usually in the same frequency position, the time positions of the other SSBs may be indicated, but the frequency domain positions of the other SSBs may not be indicated. Wherein, RO in FIG. 6 represents the way in which the random access opportunity (physical random access channel (PRACH) occurrence) indicates the time position of one or more other SSBs in SIB1, which can be in the following method Either:

Method 1: By indicating the absolute time position, optionally indicating the period, or indicating the period and the effective time. For example, the time positions of other SSBs are indicated by means of "system frame number+slot (slot)+symbol". Taking FIG. 7 as an example, the current SSB and SIB1 are in frame-1, and in SIB1, the system frame number of frame-3, and the slot position and symbol position in frame-3 are indicated. For example, the system frame number of frame-3 is 1020, and the first symbol of the indicated SSB is located in the third symbol of the fourth time slot in the frame. Optionally, as shown in FIG. 8 , the period-1 and period-2 of the SSB are indicated. For example, period-1 is 4 time slots and period-2 is 1 frame. The time position and period-1 and period-2 determine the time positions of several other SSBs. Optionally, the effective time of the period is also indicated, for example, the effective time is 4 frames, and the indicated period is considered invalid after 4 frames.

Method 2: indicate by relative time position (time slot + symbol offset relative to the first SSB), optionally indicate the period, or indicate the period and the effective time. For example, the time positions of other SSBs are indicated by means of "the number of different frames+slot position+symbol position". Taking FIG. 8 as an example, the number of frames indicated by the difference in SIB1 is 2, the slot position of the SSB in the frame is 4, and the symbol position in the slot is 3. Another feasible implementation manner is that the "number of frames + symbol position" of the difference or the number of symbols of the difference can be directly indicated by the positional relationship between the frame, the time slot and the symbol.

Optionally, period-1 and period-2 can also be indicated, for example, period-1 is 4 time slots, period-2 is 1 frame, and the terminal device can be based on the indicated first SSB time position and period-1. , period-2, to determine the time position of several other SSBs. Optionally, the effective time of the period is also indicated, for example, the effective time is 4 frames, and the indicated period is considered invalid after 4 frames.

In this embodiment of the present application, in the current SIB1, the information in the DCI corresponding to the other SSB may be indicated, and the time slot in which the DCI is located may be indicated. After detecting other SSBs, the terminal equipment can obtain the PDSCH scheduled by the DCI and demodulate the SIB1 carried thereon without blindly detecting the DCI, as shown in FIG. 6 . The manner of indicating the time slot in which the DCI is located is the same as the above-mentioned "method 1" or "method 2". The fields included in the downlink control information (DCI) scrambled by the system information-radio network temporary indicator (SI-RNTI) are shown in Table 3.

table 3

In the second embodiment, after the REDCAP terminal device is synchronized with the current SSB, other SSBs and their corresponding SIB1 can be obtained without searching the synchronization signal and the common search space again, which saves the energy consumption of searching for SSBs and blindly detecting DCI.

In this embodiment of the present application, by setting the aforementioned indication information, the REDCAP terminal device can measure more SSBs and have the opportunity to access the network from an SSB with a better beam, thereby increasing the coverage of the beam.

In the embodiment of the present application, the REDCAP terminal device indicates the time position of the second SSB and the PDSCH scheduling information of the SIB1 corresponding to the second SSB in the SIB1 corresponding to the current first SSB, so that the REDCAP terminal device does not need to search for the second SSB, By blindly detecting the PDSCH scheduling information of the SIB1 corresponding to the second SSB, the PDSCH of the SIB1 corresponding to the second SSB can be obtained, thereby achieving the purpose of reducing the power consumption of the REDCAP terminal device.

In the above embodiments provided by the present application, the methods provided by the embodiments of the present application are respectively introduced from the perspectives of network devices, terminal devices, and interaction between network devices and terminal devices. In order to implement the functions in the methods provided by the above embodiments of the present application, the network device and the terminal device may include hardware structures and/or software modules, and implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules . Whether a certain function of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and configuration constraints of the technical solution.

In order to better implement the above solutions of the embodiments of the present application, related devices for implementing the above solutions are also provided below.

Please refer to FIG. 9 , an apparatus provided by an embodiment of the present application. The device may be a terminal device, or a device in the terminal device, or a device that can be used in combination with the terminal device. FIG. 9 shows that the device is a terminal device 900 as an example. The terminal device 900 may include: a transceiver module 901 and a processing module 902 .

In one possible implementation:

The first condition includes: the synchronization signal sequence of the first SSB is a first sequence, and the second condition includes: the synchronization signal sequence of the first SSB is a second sequence, wherein the first sequence and The second sequence is a different synchronization signal sequence.

In one possible implementation:

The first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is the first reference signal, and the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB is the second reference signal; wherein, the first reference signal and the second reference signal are different demodulation reference signals.

In a possible implementation, the initialization parameter of the first reference signal is

The initialization parameters of the second reference signal are

in,

is the ID of the cell where the SSB is located. Add the following item to the initialization parameter of the second reference signal

Its value can be

Can also be other predefined numbers or with

The relevant numbers can be used to obtain the initialization parameters of the first reference signal.

In one possible implementation:

The first condition includes: the scrambling sequence of the broadcast channel of the first SSB is the first scrambling sequence, and the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is the second scrambling sequence sequence; wherein the first scrambling sequence and the second scrambling sequence are different scrambling sequences.

in,

is the ID of the cell where the SSB is located, and X is a positive integer.

An initialization sequence or an initial value of the first scrambling sequence can be obtained.

In a possible implementation, the first scrambling rule is

The second scrambling rule is

where, b(i) represents the value of the i-th bit before scrambling,

In one possible implementation:

A processing module, configured to determine the SSB used to access the network device according to the measurement of the first SSB and the measurement of the second SSB.

In one possible implementation:

a processing module, configured to, when the second SSB exists, determine at least one of the following according to the first SSB: the time domain resource location of the second SSB, the frequency domain resource location of the second SSB, and the the synchronization signal sequence of the second SSB.

In one possible implementation:

The time domain resource location of the second SSB is indicated by at least one of the system frame number, time slot and symbol where the second SSB is located, or the time domain resource location of the second SSB is indicated by the first SSB. The second SSB indicates at least one of a system frame number offset, a slot offset, and a symbol offset relative to the first SSB.

In one possible implementation:

The first SSB is further used to indicate a period corresponding to the second SSB; or, is further used to indicate a period corresponding to the second SSB and an effective time corresponding to the period.

In one possible implementation:

and a processing module, configured to determine, according to the first SSB, the information of the shared channel scheduled by the downlink control information corresponding to the second SSB when the second SSB exists.

Please refer to FIG. 10 , an apparatus provided by an embodiment of the present application. The device may be a network device, a device in a network device, or a device that can be matched with the network device. FIG. 10 shows that the device is a network device 1000 as an example. The network device 1000 may include: a transceiver module 1001 and a processing module 1002 .

In one possible implementation:

A processing module, configured to determine at least one of the following according to the first SSB: a time domain resource location of the second SSB, a frequency domain resource location of the second SSB, and a synchronization signal sequence of the second SSB.

In one possible implementation:

The time domain resource location of the second SSB is indicated by at least one of the system frame number, time slot and symbol where the second SSB is located, or,

The time domain resource location of the second SSB is indicated by at least one of a system frame number offset, a slot offset, and a symbol offset of the second SSB relative to the first SSB.

In one possible implementation:

A processing module, configured to determine, according to the first SSB, the information of the shared channel scheduled by the downlink control information corresponding to the second SSB.

For the introduction of the first SSB, the first type of SSB, and the second type of SSB, reference may be made to the foregoing method embodiments, which will not be repeated here.

The division of modules in the embodiments of this application is schematic, and is only a logical function division. In actual implementation, there may be other division methods. In addition, each functional module in each embodiment of this application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

As shown in FIG. 11 , an apparatus 1100 provided by an embodiment of the present application is used to implement the functions of the terminal device in the foregoing method. The device may be a terminal device, or a device in the terminal device, or a device that can be used in conjunction with the terminal device. Wherein, the device may be a chip system. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

The apparatus 1100 includes at least one processor 1120, configured to implement the function of the terminal device in the method provided by the embodiment of the present application. Exemplarily, the processor 1120 may receive information such as downlink control information, and parse the above information. For details, please refer to the detailed description in the method example, which will not be repeated here.

The apparatus 1100 may also include at least one memory 1130 for storing program instructions and/or data. Memory 1130 and processor 1120 are coupled. The coupling in the embodiments of the present application refers to indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 1120 may cooperate with the memory 1130. The processor 1120 may execute program instructions stored in the memory 1130 . At least one of the at least one memory may be included in the processor. The apparatus 1100 may also include a communication interface, which may be implemented in various ways, for example, the communication interface may be a transceiver, an interface, a bus, a circuit, a pin, or a The apparatus for implementing the transceiver function is illustrated in FIG. 11 with a communication interface as the transceiver 1110. The transceiver 1110 is used to communicate with other devices through a transmission medium, so that the devices in the apparatus 1100 can communicate with other devices. Illustratively, the other device may be a network device. The processor 1120 uses the transceiver 1110 to send and receive data, and is used to implement the method performed by the terminal device described in the embodiments corresponding to FIG. 1 and FIG. 5 .

The specific connection medium between the transceiver 1110 , the processor 1120 , and the memory 1130 is not limited in the embodiments of the present application. In this embodiment of the present application, the memory 1130, the processor 1120, and the transceiver 1110 are connected through a bus 1140 in FIG. 11. The bus is represented by a thick line in FIG. 11, and the connection between other components is only for schematic illustration. , is not limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 11, but it does not mean that there is only one bus or one type of bus.

As shown in FIG. 12 , an apparatus 1200 provided by an embodiment of the present application is used to implement the function of the network device in the foregoing method. The device may be a network device, or a device in a network device, or a device that can be matched and used with the network device. Wherein, the device may be a chip system. The apparatus 1200 includes at least one processor 1220, configured to implement the function of the network device in the method provided in the embodiment of the present application. Exemplarily, the processor 1220 may generate and send information such as downlink control information. For details, please refer to the detailed description in the method example, which will not be repeated here.

The apparatus 1200 may also include at least one memory 1230 for storing program instructions and/or data. Memory 1230 and processor 1220 are coupled. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 1220 may cooperate with the memory 1230.

Processor 1220 may execute program instructions stored in memory 1230 . At least one of the at least one memory may be included in the processor. The apparatus 1200 may also include a communication interface, and the communication interface may be implemented in various manners. In FIG. 12 , the transceiver 1210 is exemplified as a communication interface. The transceiver 1210 is used to communicate with other devices through a transmission medium, so that the device used in the device 1200 can communicate with other devices. Illustratively, the other device may be a terminal device. The processor 1220 uses the transceiver 1210 to send and receive data, and is configured to implement the method performed by the network device described in the embodiments corresponding to FIG. 1 and FIG. 5 .

The specific connection medium between the transceiver 1210, the processor 1220, and the memory 1230 is not limited in the embodiments of the present application. In this embodiment of the present application, the memory 1230, the processor 1220, and the transceiver 1210 are connected through a bus 1240 in FIG. 12. The bus is represented by a thick line in FIG. 12, and the connection between other components is only for schematic illustration. , is not limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 12, but it does not mean that there is only one bus or one type of bus.

In this embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or The methods, steps and logic block diagrams disclosed in the embodiments of this application are executed. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

In this embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may also be a volatile memory (volatile memory), for example Random-access memory (RAM). Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.

The technical solutions provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs)), or semiconductor media, and the like.

In the embodiments of the present application, on the premise of no logical contradiction, the embodiments may refer to each other. For example, the methods and/or terms between the method embodiments may refer to each other, such as the functions and/or the device embodiments. Or terms may refer to each other, eg, functions and/or terms between an apparatus embodiment and a method embodiment may refer to each other.

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

Claims

A method for transmitting a synchronization signal block SSB, comprising:

receiving a first SSB from a network device, the first SSB being a first type SSB or a second type SSB, the first type SSB and the second type SSB being different types of SSB;

If the first SSB satisfies the first condition, it is determined that the first SSB is the SSB of the first type; or,

If the first SSB satisfies the second condition, it is determined that the first SSB is the SSB of the second type.
The method according to claim 1, wherein the first condition comprises: the synchronization signal sequence of the first SSB is the first sequence, and the second condition comprises: the synchronization signal sequence of the first SSB is the second sequence,

Wherein, the first sequence and the second sequence are different synchronization signal sequences.
The method according to claim 1 or 2, wherein the first condition comprises: the demodulation reference signal of the broadcast channel of the first SSB is the first reference signal, and the second condition comprises: the The demodulation reference signal of the broadcast channel of the first SSB is the second reference signal;

Wherein, the first reference signal and the second reference signal are different demodulation reference signals.
The method according to any one of claims 1 to 3, wherein the first condition comprises: the scrambling sequence of the broadcast channel of the first SSB is the first scrambling sequence, and the second condition Including: the scrambling sequence of the broadcast channel of the first SSB is the second scrambling sequence;

Wherein, the first scrambling sequence and the second scrambling sequence are different scrambling sequences.
The method according to any one of claims 1 to 4, wherein if it is determined that the first SSB is the first type SSB, the method further comprises:

determining whether a second SSB exists according to the first SSB, wherein the second SSB is the first type SSB or the second type SSB;

receiving the second SSB from the network device when the second SSB exists;

Initiating random access to the network device according to the first SSB or the second SSB.
The method according to claim 5, wherein the initiating random access to the network device according to the first SSB or the second SSB comprises:

The SSB used to access the network device is determined according to the measurement quantity of the first SSB and the measurement quantity of the second SSB.
The method according to claim 5 or 6, wherein the method further comprises:

When the second SSB exists, at least one of the following is determined according to the first SSB: a time domain resource location of the second SSB, a frequency domain resource location of the second SSB, and a Configuration information for the synchronization signal sequence.
The method according to claim 7, wherein the time domain resource location of the second SSB is indicated by at least one of a system frame number, time slot and symbol where the second SSB is located, or,

The time domain resource location of the second SSB is indicated by at least one of a system frame number offset, a slot offset, and a symbol offset of the second SSB relative to the first SSB.
The method according to any one of claims 5 to 8, wherein the first SSB is further used to indicate a period corresponding to the second SSB; or, is further used to indicate that the second SSB corresponds to period and the effective time corresponding to the period.
The method according to any one of claims 5 to 9, wherein the method further comprises:

When the second SSB exists, the information of the shared channel scheduled by the downlink control information corresponding to the second SSB is determined according to the first SSB.
A method for transmitting a synchronization signal block SSB, comprising:

broadcast the first SSB;

Wherein, the first SSB is a first-type SSB or a second-type SSB, and the first-type SSB and the second-type SSB are different types of SSB;

When the first SSB is the first type SSB, the first SSB satisfies the first condition,

When the first SSB is the second type of SSB, the first SSB satisfies the second condition.
The method according to claim 11, wherein the first condition comprises: the synchronization signal sequence of the first SSB is the first sequence, and the second condition comprises: the synchronization signal sequence of the first SSB is the second sequence,

Wherein, the first sequence and the second sequence are different synchronization signal sequences.
The method according to claim 11 or 12, wherein the first condition comprises: the demodulation reference signal of the broadcast channel of the first SSB is the first reference signal, and the second condition comprises: the The demodulation reference signal of the broadcast channel of the first SSB is the second reference signal;

Wherein, the first reference signal and the second reference signal are different demodulation reference signals.
The method according to any one of claims 11 to 13, wherein the first condition comprises: the scrambling sequence of the broadcast channel of the first SSB is the first scrambling sequence, and the second condition Including: the scrambling sequence of the broadcast channel of the first SSB is the second scrambling sequence;

Wherein, the first scrambling sequence and the second scrambling sequence are different scrambling sequences.
The method according to any one of claims 11 to 14, wherein the method further comprises:

A second SSB is broadcast, wherein the second SSB is the first type SSB or the second type SSB.
The method according to claim 15, wherein the first SSB is used to indicate at least one of the following: a time domain resource location of the second SSB, a frequency domain resource location of the second SSB, and the The configuration information of the synchronization signal sequence of the second SSB is described.
The method according to claim 16, wherein the time domain resource location of the second SSB is indicated by at least one of a system frame number, time slot and symbol where the second SSB is located, or,

The time domain resource location of the second SSB is indicated by at least one of a system frame number offset, a slot offset, and a symbol offset of the second SSB relative to the first SSB.
The method according to any one of claims 15 to 17, wherein the first SSB is further used to indicate a period corresponding to the second SSB; or, is further used to indicate that the second SSB corresponds to period and the effective time corresponding to the period.
The method according to any one of claims 15 to 18, wherein the first SSB is further used to indicate information of a shared channel scheduled by downlink control information corresponding to the second SSB.
A communication device, characterized by being used for implementing the method according to any one of claims 1 to 10.
A communication device, characterized in that, the device comprises a processor and a memory, the memory is coupled to the processor, and the processor is configured to execute the method of any one of claims 1 to 10.
A communication device, characterized by being used for implementing the method according to any one of claims 11 to 19.
A communication device, characterized in that the device comprises a processor and a memory, the memory and the processor are coupled, and the processor is configured to execute the method of any one of claims 11 to 19.
A communication system, characterized by comprising the communication device according to claim 20 or 21, and the communication device according to claim 22 or 23.
A computer-readable storage medium, characterized in that, instructions are stored on the computer-readable storage medium, and when the instructions are executed on a computer, the computer is made to execute the method of any one of claims 1 to 19 .
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 19.