A method for transmitting a synchronization signal block and a communication device

Abstract

An embodiment of the present application discloses a method and a communication device for transmitting a synchronization signal block, wherein the method includes: 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 SSBs; if the first SSB satisfies a first condition, determining that the first SSB is the first type SSB; or, if the first SSB satisfies a second condition, determining that the first SSB is the second type SSB.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and a communication device for transmitting a synchronization signal block. Background Art

[0002] To cope with the explosive growth of mobile data traffic, the massive number of connected mobile communication devices, and the emergence of various new services and application scenarios, the fifth generation (5G) mobile communication system has emerged. For example, 5G mobile communication systems define three major application scenarios: enhanced mobile broadband (eMBB), ultrareliable and low latency communications (URLLC), and massive machine type communications (mMTC).

[0003] Exemplary eMBB scenarios include ultra-high-definition video, augmented reality (AR), and / or virtual reality (VR). The main characteristics of these services may be large amounts of transmitted data and high transmission rates. URLLC scenarios include wireless control in industrial manufacturing or production processes, motion control of unmanned vehicles or drones, remote repair of unmanned vehicles or drones, and / or tactile interaction applications such as remote surgery. The main characteristics of these services may be ultra-high reliability and low latency requirements for transmission. In addition, the characteristics of these services may also include small amounts of transmitted data and / or burstiness. mMTC scenarios include smart grid distribution automation, communication of wearable devices, and / or smart cities. The main characteristics of these services may be a large number of connected devices and / or a small amount of transmitted data. In addition, terminal devices in mMTC scenarios may need to meet the requirements of low cost and relatively long standby time. Summary of the Invention

[0004] An embodiment of the present application provides a synchronization signal block transmission method and a communication device for a terminal device to determine different types of SSBs, so that one or more types of terminal devices can access different types of SSBs according to business needs or according to channel status, to obtain better network services or better transmission capabilities.

[0005] To solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a method for transmitting a synchronization signal block, including: 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 a first condition, determining that the first SSB is the first type SSB; or, if the first SSB satisfies a second condition, determining that the first SSB is the second type SSB.

[0007] In the above solution, the network device can broadcast different types of SSBs, which solves the problem of the network device setting the same type of SSB for all terminal devices, allowing the first terminal device to determine the type of SSB. Therefore, independent SSBs can be provided for different types of terminal devices, thereby meeting the communication needs of various types of terminal devices.

[0008] In one possible implementation, the first condition includes: the synchronization signal sequence of the first SSB is a first sequence; the second condition includes: the synchronization signal sequence of the first SSB is a second sequence, wherein the first sequence and the second sequence are different synchronization signal sequences. In the above scheme, different types of SSBs can be distinguished by the difference in synchronization signal sequences, thereby saving signaling overhead for indicating the type of SSB.

[0009] In one possible implementation, the first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a first reference signal; the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB 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 by 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.

[0010] In one possible implementation, the initialization parameter of the first reference signal is:

[0011]

[0012] The initialization parameters of the second reference signal are:

[0013]

[0014] in, It is the SSB index or the high r bit value or low r bit value of the SSB index, where r is a positive integer, for example The value of the upper or lower 3 bits of the SSB index has eight different possibilities, thus forming eight different DMRS sequences. r(m) is the mth element in the DMRS sequence, where m is an integer. c(n) is the nth element in sequence c, where n is an integer. It is the cell ID where the SSB is located. The value of can be It can also be other predefined numbers or Related numbers.

[0015] In one possible implementation, the first condition includes: the scrambling sequence of the broadcast channel of the first SSB is a first scrambling sequence, and the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is a second scrambling sequence; wherein, the first scrambling sequence and the second scrambling sequence are different scrambling sequences.

[0016] In the above scheme, the first terminal device can determine the type of the first SSB by the specific conditions satisfied by the scrambling sequence of the broadcast channel of the first SSB, thereby saving the signaling overhead for indicating the type of SSB.

[0017] In a possible implementation, the initialization sequence or initial value of the first scrambling sequence is The initialization sequence or initial value of the second scrambling sequence is

[0018] in, is the cell ID where the SSB is located, and X is a positive integer.

[0019] In one possible implementation, the first condition includes: the scrambling rule of the broadcast channel of the first SSB is a first scrambling rule, and the second condition includes: the scrambling rule of the broadcast channel of the first SSB is a second scrambling rule; wherein the first scrambling rule and the second scrambling rule are different scrambling rules. In the above solution, the signaling overhead for indicating the type of the SSB can be saved.

[0020] In a possible implementation, the first scrambling rule is

[0021] The second scrambling rule is

[0022] 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, and the value of n is i+v*M bitThe value of v can be a decimal and / or an integer. By adding a "+1" term to the equation of the second scrambling rule, the first scrambling rule can be obtained. The first scrambling rule and the second scrambling rule are different scrambling rules.

[0023] In one possible implementation, if it is determined that the first SSB is the first type SSB, the method further includes: determining whether a second SSB exists based on the first SSB, wherein the second SSB is the first type SSB or the second type SSB; when the second SSB exists, receiving the second SSB from the network device; and initiating random access to the network device based on the first SSB or the second SSB.

[0024] In one possible implementation, initiating random access to the network device based on the first SSB or the second SSB includes: determining the SSB used to access the network device based on the measurement amount of the first SSB and the measurement amount of the second SSB.

[0025] In the above scheme, the first terminal device selects the SSB with the best or better channel quality based on 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. After obtaining random access resources based on the system information, the random access process can be performed to improve the efficiency of the first terminal device accessing the network.

[0026] In one possible implementation, the method further includes: when the second SSB exists, determining at least one of the following based on 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 the above solution, the first terminal device can obtain information about the second SSB through the first SSB, and this information can be used to receive the second SSB information, thereby saving power consumption of the first terminal device in searching for the SSB.

[0027] In one possible implementation, the time domain resource position of the second SSB is indicated by at least one of the system frame number, time slot and symbol in which the second SSB is located, or the time domain resource position of the second SSB is indicated by at least one of the system frame number offset, time slot offset and symbol offset of the second SSB relative to the first SSB.

[0028] In the above scheme, the first SSB can be used to indicate the time domain resource location of the second SSB. Specifically, the network device can adopt 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 system information corresponding to the first SSB 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 can adopt an indirect indication method (or a relative indication method), for example, the first SSB can indicate at least one of the system frame number offset, time slot offset and symbol offset of the second SSB relative to 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 of the first SSB from the system information, thereby determining the system frame number of the second SSB. This method can save the power consumption of the first terminal device searching for the second SSB.

[0029] In one possible implementation, the first SSB is also used to indicate the period corresponding to the second SSB; or, it is also used to indicate the period corresponding to the second SSB and the valid time corresponding to the period.

[0030] In the above solution, the first SSB can also indicate the period corresponding to the second SSB. The first terminal device can determine the period corresponding to the second SSB through the first SSB, so that the first terminal device can 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. After the valid time expires, the network device no longer periodically sends the second SSB, or the period at which the network device sends the second SSB changes. This method can save power consumption of the first terminal device searching for the second SSB.

[0031] In one possible implementation, when the second SSB is present, the first SSB is used to indicate configuration information of a downlink control channel, where the control information on the downlink control channel is used to schedule system information. 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. The time domain resource location includes at least one of the following: a symbol position, a timeslot position, and a frame number.

[0032] In one possible implementation, the method further includes: when the second SSB exists, determining information about the shared channel scheduled by the downlink control information corresponding to the second SSB based on 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 indication of the first SSB, without having to obtain the shared channel scheduled by the downlink control information corresponding to the second SSB by receiving the second SSB. This can reduce the overhead of the first terminal device in detecting the scheduling information of the shared channel.

[0033] In the second aspect, an embodiment of the present application also 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 SSBs; when the first SSB is the first type SSB, the first SSB satisfies a first condition, and when the first SSB is the second type SSB, the first SSB satisfies a second condition.

[0034] For the description of the first and second conditions, please refer to the first aspect and will not be repeated here.

[0035] In one possible implementation, the method further includes: broadcasting a second SSB, wherein the second SSB is the first type SSB or the second type SSB.

[0036] For the introduction of the second SSB, please refer to the first aspect and will not be repeated here.

[0037] In a third aspect, an embodiment of the present application provides a device, which may be a terminal device, a device in a terminal device, or a device that can be used in conjunction with a terminal device. In one configuration, the device may include a module that performs the method / operation / step / action described in the first aspect, and the module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one configuration, the device may include a processing module and a transceiver module. For example,

[0038] In one possible implementation:

[0039] a transceiver module, configured to receive a first synchronization signal block (SSB) from a network device, where 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 SSBs;

[0040] A processing module is used to determine that the first SSB is the first type SSB if the first SSB meets a first condition; or to determine that the first SSB is the second type SSB if the first SSB meets a second condition.

[0041] For the introduction of the first and second conditions, please refer to the first aspect and will not be repeated here.

[0042] In one possible implementation:

[0043] If it is determined that the first SSB is the first type SSB, a processing module is configured to determine whether a second SSB exists based on the first SSB, wherein the second SSB is the first type SSB or the second type SSB;

[0044] a transceiver module, configured to receive the second SSB from the network device when the second SSB exists;

[0045] A processing module is used to initiate random access to the network device according to the first SSB or the second SSB.

[0046] For the introduction of the second SSB, please refer to the first aspect and will not be repeated here.

[0047] In a fourth aspect, an embodiment of the present application provides a device, which may be a network device, a device in a network device, or a device that can be used in conjunction with a network device. In one configuration, the device may include a module that performs the method / operation / step / action described in the second aspect, and the module may be a hardware circuit, software, or a combination of hardware circuit and software. In one configuration, the device may include a processing module and a transceiver module. For example,

[0048] In one possible implementation:

[0049] A processing module, configured to broadcast a first SSB through the transceiver module;

[0050] 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 SSBs;

[0051] When the first SSB is the first type SSB, the first SSB satisfies a first condition,

[0052] When the first SSB is the second type SSB, the first SSB satisfies the second condition.

[0053] For the introduction of the first and second conditions, please refer to the first aspect and will not be repeated here.

[0054] In one possible implementation:

[0055] A processing module is used to broadcast a second SSB through the transceiver module, wherein the second SSB is the first type SSB or the second type SSB.

[0056] For the introduction of the second SSB, please refer to the first aspect and will not be repeated here.

[0057] In a fifth aspect, an embodiment of the present application provides a device, which includes a processor for implementing the method described in the first aspect above. Optionally, the device 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 above can be implemented. The device may also include a communication interface, which is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin or other type of communication interface, and the other device may be a network device. In one possible device, the device includes:

[0058] a memory for storing program instructions;

[0059] The processor is used to utilize the communication interface to execute the steps in the aforementioned first aspect, which are not specifically limited here.

[0060] In the fifth and sixth aspects, an embodiment of the present application provides a device, which includes a processor for implementing the method described in the second aspect above. Optionally, the device 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 device may also include a communication interface, which is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin or other type of communication interface, and the other device may be a terminal device. In one possible device, the device includes:

[0061] a memory for storing program instructions;

[0062] The processor is used to utilize the communication interface to execute the steps in the aforementioned second aspect, which are not specifically limited here.

[0063] In the seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, comprising instructions, which, when executed on a computer, enables the computer to execute the method described in any one of the first to second aspects.

[0064] In an eighth aspect, an embodiment of the present application further provides a computer program product, comprising instructions, which, when executed on a computer, enables the computer to execute the method described in any one of the first to second aspects.

[0065] In a ninth aspect, an embodiment of the present application provides a chip system, which includes a processor and may also include a memory, for implementing the method described in any one of aspects 1 to 2. The chip system may be composed of a chip, or may include a chip and other discrete devices.

[0066] In a ninth aspect, an embodiment of the present application provides a system, comprising the apparatus described in the third aspect or the apparatus described in the fifth aspect, and the apparatus described in the fourth aspect or the apparatus described in the sixth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of an interactive flow of a synchronization signal block transmission method provided in an embodiment of the present application;

[0068] Figure 2 A schematic diagram of a newly added SSB provided in an embodiment of the present application;

[0069] Figure 3 A schematic diagram of a newly added SSB corresponding to SIB1 provided in an embodiment of the present application;

[0070] Figure 4 Schematic diagram of the relationship between PSS, SSS and PBCH in SSB provided in an embodiment of the present application;

[0071] Figure 5 A schematic diagram of a process for a REDCAP terminal device to access a network provided in an embodiment of the present application;

[0072] Figure 6 A schematic diagram of SIB1 indicating other SSBs and other SIB1s provided in an embodiment of the present application;

[0073] Figure 7 A schematic diagram showing the absolute time position of other SSBs indicated by SIB1 provided in an embodiment of the present application;

[0074] Figure 8 A schematic diagram showing the relative time positions of other SSBs indicated by SIB1 provided in an embodiment of the present application;

[0075] Figure 9 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0076] Figure 10 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0077] Figure 11 A schematic diagram of the structure of a device provided in an embodiment of the present application;

[0078] Figure 12 A schematic diagram of the structure of a device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0079] The embodiments of the present application provide a method and a communication device for transmitting a synchronization signal block, which are used to determine multiple types of SSBs, so that one or more types of terminal devices can access different types of SSBs according to business needs or channel status, obtain better network services, or obtain better transmission capabilities.

[0080] The embodiments of the present application are described below with reference to the accompanying drawings.

[0081] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as long-term evolution (LTE) systems, 5G mobile communication systems, wireless-fidelity (WiFi) systems, future sixth-generation communication systems, or systems integrating multiple communication systems, etc., and the embodiments of the present application are not limited thereto. Among them, the 5G mobile communication system can also be called a new radio (NR) mobile communication system.

[0082] The technical solutions provided in the embodiments of the present application can be applied to various communication scenarios, for example, one or more of the following communication scenarios: eMBB, URLLC, mMTC, device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, and Internet of Things (IoT).

[0083] A wireless communication system includes communication devices, and the communication devices can use air interface resources to communicate wirelessly. The communication devices may include network devices and terminal devices, and the network devices may also be referred to as network-side devices. Air interface resources may include at least one of time domain resources, frequency domain resources, code resources, and space resources. In the embodiment of the present application, at least one (kind) may also be described as one (kind) or multiple (kinds), and multiple (kinds) may be two (kinds), three (kinds), four (kinds) or more (kinds), which is not limited in the embodiment of the present application. For example, the 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.

[0084] In the embodiments of this application, " / " can indicate that the associated objects are in an "or" relationship. For example, A / B can represent A or B. In formula calculations, " / " can represent the division symbol. For example, N / M represents N divided by M, where N and M each represent a numerical value. "And / or" can be used to describe three types of relationships between associated objects. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. To facilitate the description of the technical solutions of the embodiments of this application, the words "first," "second," "A," and "B" may be used in the embodiments of this application to distinguish between technical features with the same or similar functions. The words "first," "second," "A," and "B" do not limit the number or order of execution, and the words "first," "second," "A," and "B" do not necessarily indicate differences. In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. An embodiment or arrangement described as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or arrangements. The use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0085] The terminal device involved in the embodiments of the present application can also be referred to as a terminal, and can be a device with wireless transceiver functions. The terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or it can be deployed on the water surface (such as a ship, etc.); or it can be deployed in the air (for example, on an airplane, a balloon, or a satellite, etc.). The terminal device can be a user equipment (UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication functions. Exemplarily, the UE can be a mobile phone, a tablet computer, or a computer with wireless transceiver functions. 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, a wireless terminal in a smart grid, a wireless terminal in a smart city, or a wireless terminal in a smart home, etc. In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or it can be a device that can support the terminal device to realize the function, such as a chip system. The device can be installed in a terminal device, or the device can be used in conjunction with a terminal device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the embodiment of the present application, the technical solution provided in the embodiment of the present application is specifically described by taking the terminal device as an example of the device for realizing the function of the terminal device.

[0086] 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 terminal device may also be referred to as a reduced capability (REDCAP) terminal device. Among them, the eMBB terminal device may be a terminal device capable of transmitting eMBB services. REDCAP terminal devices may exist in mMTC scenarios, but are not limited to mMTC scenarios. The mMTC scenario may include but is not limited to only REDCAP terminal devices. Relative to the REDCAP terminal device, the traditional terminal device may be a high-capability terminal or a terminal device with unlimited capabilities. In an embodiment of the present application, the traditional terminal device may be replaced by a high-capability terminal device introduced in the future, relative to the REDCAP terminal device. Exemplarily, the feature comparison between the high-capability terminal and the REDCAP terminal device satisfies at least one of the following first to ninth items.

[0087] The first item is that the maximum bandwidth supported by the high-capability terminal device is greater than the maximum bandwidth supported by the REDCAP terminal device. For example, the maximum bandwidth supported by the high-capability terminal device may be 100 megahertz (MHz) or 200 MHz, while the maximum bandwidth supported by the REDCAP terminal device may be 20 MHz, 10 MHz, or 5 MHz.

[0088] Second: The high-capability terminal device has more antennas than the REDCAP terminal device. This number of antennas can be the number of antennas configured for the terminal device or the maximum number of antennas used for transmission and / or reception. For example, a high-capability terminal device supports up to four antennas for reception and two antennas for transmission, while a REDCAP terminal device supports up to two antennas for reception and one antenna for transmission. Alternatively, even if the high-capability terminal device has the same number of antennas as the REDCAP terminal device, its capabilities for antenna-selective transmission differ. For example, a high-capability terminal device and a low-capability terminal device both support two antennas for transmission, but the high-capability terminal device supports antenna-selective transmission while the low-capability terminal device does not. For example, with a single-antenna port data transmission, the high-capability terminal device can switch the single-antenna port data transmission between two transmit antennas, achieving spatial diversity gain. However, the low-capability terminal device can only transmit data simultaneously on two transmit antennas, equivalent to the transmission performance of a single transmit antenna.

[0089] Item 3: The maximum transmit power supported by the high-capability terminal device is greater than the maximum transmit power supported by the REDCAP terminal device. For example, the maximum transmit power supported by the high-capability terminal device is 23 decibel-milliwatt (dBm) or 26dBm, while the maximum transmit power supported by the REDCAP terminal device is a value between 4dBm and 20dBm.

[0090] Item 4: High-capability terminal devices support carrier aggregation (CA), while REDCAP terminal devices do not support carrier aggregation.

[0091] Item 5: When both a high-capability terminal device and a REDCAP terminal device support carrier aggregation, the maximum number of carriers supported by the high-capability terminal device is greater than the maximum number of carriers supported by the REDCAP terminal device. For example, a high-capability terminal device supports a maximum of 32 carriers or 5 carrier aggregation, while a REDCAP terminal device supports a maximum of 2 carrier aggregation.

[0092] Item 6: High-capability devices and REDCAP devices were introduced in different protocol versions. For example, in the NR protocol, high-capability devices were introduced in release (R) 15 of the protocol, and REDCAP devices were introduced in release 17 of the protocol.

[0093] Item 7: High-capability devices and REDCAP devices have different duplex capabilities. High-capability devices have stronger duplex capabilities. For example, high-capability devices support full-duplex frequency division duplex (FDD), meaning they can receive and transmit simultaneously when supporting FDD. REDCAP devices support half-duplex FDD, meaning they cannot receive and transmit simultaneously when supporting FDD.

[0094] Item 8: The data processing capability of a high-capability terminal device is stronger than that of a REDCAP terminal device. A high-capability terminal device can process more data in the same time, or a high-capability terminal device can process the same data in a shorter time. For example, the time it takes for a terminal device to receive downlink data from a network device is recorded as T1. After the terminal device processes the downlink data, the time it takes for the terminal device to send feedback on the downlink data to the network device is recorded as T2. The delay (i.e., the time difference) between T2 and T1 of a high-capability terminal device is less than the delay between T2 and T1 of a REDCAP terminal device. The feedback of the downlink data can be ACK feedback or NACK feedback.

[0095] Item 9: The peak data transmission rate of the high-capability terminal device is greater than the peak data transmission rate of the REDCAP terminal device. Data transmission includes uplink data transmission (i.e., the terminal device sends data to the network device) and / or downlink data transmission (i.e., the terminal device receives data from the network device).

[0096] The network devices involved in the embodiments of the present application include a base station (BS), which can be a device deployed in a wireless access network that can communicate wirelessly with a terminal device. Among them, the base station may have various forms, such as a macro base station, a micro base station, a relay station, or an access point. For example, the base station involved in the embodiments of the present application can be a base station in a 5G mobile communication system or a base station in LTE, wherein the base station in the 5G mobile communication system can also be called a transmission reception point (TRP) or a gNB.

[0097] In the embodiments of the present application, the apparatus for implementing the functions of a network device may be a network device, or may be a device capable of supporting the network device in implementing the functions, such as a chip system. The apparatus may be installed in the network device, or the apparatus may be used in conjunction with the network device. In the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described in detail using the example of the apparatus for implementing the functions of a network device being a network device.

[0098] The technical solutions provided in the embodiments of the present application can be applied to wireless communications between communication devices. Wireless communications between communication devices may include: wireless communications between network devices and terminal devices, wireless communications between network devices and network devices, or wireless communications between terminal devices and terminal devices. In the embodiments of the present application, the term "wireless communications" may also be referred to as "communication", 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 to perform wireless communications between a scheduling entity and a subordinate entity, wherein the scheduling entity can allocate air interface resources to the subordinate entity. Those skilled in the art may use the technical solutions provided in the embodiments of the present application for wireless communications between other scheduling entities and subordinate entities, such as wireless communications between a macro base station and a micro base station, such as wireless communications between a first terminal device and a second terminal device. The embodiments of the present application are described by taking the communication between a network device and a terminal device as an example.

[0099] In an embodiment of the present application, the terminal device can establish a connection between the terminal device and the network device through an initial access process, thereby being able to transmit data with the network device.

[0100] In one possible implementation, the main process of initial access of a terminal device (such as a traditional terminal device) includes:

[0101] Step a: Detecting the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) from the network device, thereby receiving a synchronization signal band (SSB) from the network device, wherein the SSB includes the PSS, SSS, and physical broadcast channel (PBCH);

[0102] Step b. Obtain a master information block (MIB) from the PBCH; if the SSB is determined to be a cell-defined synchronization signal block (CD-SSB) according to the MIB, determine the common search space (CSS) and control resource set (CORESET) #0 according to the indication of the MIB; if the SSB is determined to be a non-cell-defined synchronization signal block (Non-CD-SSB) according to the MIB, search for the CD-SSB according to the indication of the Non-CD-SSB, and determine the CSS and CORESET #0 according to the indication of the MIB where the CD-SSB is found;

[0103] Step c: Determine candidate resources for transmitting a physical downlink control channel (PDCCH) based on CORESET #0 and CSS. The PDCCH carries downlink control information (DCI); detect the DCI in the candidate PDCCH resources; after detecting the DCI, receive a physical downlink shared channel (PDSCH) based on the scheduling information indicated by the DCI. The PDSCH carries system information of the cell (e.g., SIB 1 and / or other SIBs). That is, obtain the system information of the cell based on the DCI.

[0104] Step d: Based on the system information, a random access process is initiated to the network device to establish a connection between the terminal device and the network device.

[0105] In an embodiment of the present application, the above-mentioned initial access process uses MIB to determine that the SSB is CD-SSB, determines CSS and CORESET#0, determines PDCCH according to CORESET#0 and CSS, detects DCI in the candidate resources of PDCCH, and obtains system information according to DCI. The entire process is collectively referred to as "accessing the network through SSB", or "accessing the network using SSB", or "accessing the network using SSB", or "initial access to the network through SSB", and the subsequent content will no longer explain the process of accessing the network through SSB.

[0106] In an embodiment of the present application, the MIB of the SSB may indicate the CSS and CORESET#0, and the CORESET#0 and 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 information corresponding to the SSB.

[0107] During the initial access process described above, network devices can use beamforming technology to send SSBs. To accommodate traditional terminal devices, the formed beam may be relatively wide, providing wide coverage, but the coverage distance is limited. If this wide beam is used for a REDCAP terminal device, when a REDCAP terminal device with lower coverage initiates random access, due to the reciprocity of the uplink and downlink channel environments, the base station cannot detect the uplink signal sent by the REDCAP terminal device, or the detected signal is weak. Therefore, wide-beam SSBs may not be used for random access by REDCAP terminals at the cell edge or in scenarios with weak coverage. Due to the different characteristics of different terminal devices (e.g., eMBB terminal devices and REDCAP terminal devices, or URLLC terminal devices and REDCAP terminal devices, or eMBB terminal devices and URLLC terminal devices), different terminal devices may require independent SSBs to meet their respective needs. Furthermore, different terminal devices may also require independent system information (e.g., different system information), dedicated access networks, and / or control channels of different performance to meet their respective needs.

[0108] Based on the above analysis, embodiments of the present application propose a synchronization signal block transmission method suitable for communication scenarios between network devices and various types of terminal devices. This method can provide independent SSBs for different types of terminal devices, thereby meeting the communication needs of various types of terminal devices. Independent SSBs refer to network devices broadcasting the SSBs required by different types of terminal devices.

[0109] In the embodiments of the present application, terminal devices of various capability types may be included based on their different capabilities. For example, two different types of terminal devices may be represented by type A terminal devices and type B terminal devices. For example, type A terminal devices may be terminal devices used in industrial wireless sensor networks (IWSNs), and type B terminal devices may be terminal devices used in video surveillance.

[0110] For example, a Type A terminal device may be an 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, where REDCAP terminal device A and REDCAP terminal device B differ in 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.

[0111] In the embodiments of the present application, for ease of description, the corresponding technical solutions are described using traditional terminal devices and REDCAP terminal devices as examples. For other types of terminal devices, the SSB processing methods of traditional terminal devices and REDCAP terminal devices can be referenced.

[0112] In the embodiment of the present application, on the basis that the network device can only broadcast one type of SSB, it can also broadcast another newly added SSB. For example, the network device can use a narrower beam to send the newly added SSB, so the coverage distance of the SSB is longer. Optionally, the terminal device does not perceive which width of beam the network device uses to send the SSB. For example, the newly added SSB can be used exclusively for REDCAP terminal devices to access the network. The process of accessing the network through SSB is described in detail in the above content. The REDCAP terminal device can receive the SSB and obtain system information. Optionally, the newly added SSB cannot be correctly interpreted by traditional terminal devices, so that the newly added SSB does not affect the traditional terminal devices. Among them, the traditional terminal device cannot correctly interpret the SSB means that the traditional terminal device cannot search for the SSB, or the traditional terminal device cannot interpret the information carried by the SSB, or the traditional terminal device can obtain the information carried by the SSB, but cannot correctly parse the meaning of the information.

[0113] See also Figure 1 FIG. 1 is a schematic diagram of an interaction process between a network device and a terminal device provided in an embodiment of the present application. The interaction process mainly includes the following steps:

[0114] 101. The network device broadcasts the first SSB.

[0115] The first SSB is a first type SSB or a second type SSB; when the first SSB is a first type SSB, the first SSB satisfies a first condition; when the first SSB is a second type SSB, the first SSB satisfies a second condition. The first type SSB and the second type SSB are different types of SSBs.

[0116] The network device can manage one or more (for example, 2, 3, or 6) cells, and the first terminal device can communicate with the network device in at least one of the cells (for example, 1 or 2 cells). Taking the at least one cell as the first cell as an example, the network device can broadcast the first SSB in the first cell, and the first terminal device can search for the first SSB in the first cell. For example, the first terminal device obtains the SSB by detecting the PSS and SSS at a frequency specified by the protocol or at a frequency where the SSB may exist.

[0117] In the embodiment of the present application, the network device can send multiple different types of SSBs. For example, the network device can send a first type SSB and a second type SSB, where the first type SSB and the second type SSB are different types of SSBs. It is not limited to the above. The network device can also send more types of SSBs. For example, the network device can send a third type SSB and a fourth type SSB.

[0118] In the embodiments of the present application, the first type SSB and the second type SSB are different types of SSB. Different types of SSB can be implemented in a variety of ways. For example, different types of SSB can be distinguished based on the beam range corresponding to the SSB, or different types of SSB can be distinguished based on the transmit power corresponding to the SSB. Distinguishing different types of SSB based on the beam range corresponding to the SSB can also be described as distinguishing different types of SSB based on the antenna port corresponding to the SSB.

[0119] For example, the first terminal device and the second terminal device are terminal devices of different types, the first type SSB is an SSB that the first terminal device can correctly interpret, and the first type SSB is an SSB that the second terminal device cannot correctly interpret, the second type SSB is an SSB that the second terminal device can correctly interpret, and the second type SSB is an SSB that the first terminal device cannot correctly interpret, or the second type SSB is an SSB that both the second terminal device and the first terminal device can correctly interpret. For ease of description, the type of the first terminal device can be described as the first type, and the type of the second terminal device can be described as the second type.

[0120] In an embodiment of the present application, when the network device generates the first SSB, the network device can 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. 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. Among them, the first condition and the second condition are conditions set according to the type of SSB that the network device needs to send, and there is a one-to-one correspondence between different conditions and SSB types. It should be noted that the first SSB and the first type SSB are not the same concepts. The first SSB is used to specifically refer to one or some SSBs, and the first type SSB refers to an SSB type that meets certain characteristics. Similarly, the second SSB and the second type SSB are not the same concepts. The second SSB is used to specifically refer to one or some SSBs, and the second type SSB refers to an SSB type that meets certain characteristics.

[0121] In an embodiment of the present application, the network device broadcasts a 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 based on the first SSB. For details on the process of accessing the network through SSB, please refer to the above content description. The first SSB can be an SSB that can be correctly interpreted by the first terminal device, and the first SSB can be an SSB that cannot be correctly interpreted by the second terminal device. Therefore, depending on the type of SSB, terminal devices of different device types may process the SSB differently.

[0122] 102. The first terminal device receives a first synchronization signal block SSB from the network device, where the first SSB is a first type SSB or a second type SSB.

[0123] Among them, the first type SSB and the second type SSB are different types of SSB.

[0124] 103. If the first SSB satisfies the first condition, the first terminal device determines that the first SSB is a first type SSB. Or,

[0125] 104. If the first SSB satisfies the second condition, the first terminal device determines that the first SSB is a second type SSB.

[0126] Among them, 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 satisfied by the first SSB. For example, if the first SSB satisfies the first condition, the aforementioned step 103 is executed; for example, if the first SSB satisfies the second condition, the aforementioned step 104 is executed.

[0127] In some embodiments of the present application, 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 are different synchronization signal sequences.

[0128] 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 a first type SSB, the network device may set the synchronization signal sequence of the first SSB to the first sequence. When the network device determines that the first SSB is a second type SSB, the network device may set the synchronization signal sequence of the first SSB to the second sequence.

[0129] Specifically, in some embodiments of the present application, the synchronization signal sequence of the first SSB may include: a first PSS or a first SSS. For example, if the first PSS of the first SSB is a first sequence, the first SSB satisfies the first condition, and the first SSB can be correctly interpreted by the first terminal device. If the first PSS of the first SSB is a second sequence, the first SSB satisfies the second condition, and the first SSB cannot be correctly interpreted by the first terminal device. For another example, if the first SSS of the first SSB is a first sequence, the first SSB can be correctly interpreted by the first terminal device. If the first SSS of the first SSB is a second sequence, the first SSB cannot be correctly interpreted by the first terminal device. Therefore, in the embodiments of the present application, different types of SSBs can be distinguished by the difference in synchronization signal sequences. For example, if the first type of SSB is an SSB that can be correctly interpreted by the first terminal device, the first terminal device can access the network through the first SSB. The process of accessing the network through the SSB is described in detail in the aforementioned content.

[0130] 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 a first reference signal, and the second condition includes: a demodulation reference signal of the broadcast channel of the first SSB is a second reference signal;

[0131] The first reference signal and the second reference signal are different demodulation reference signals.

[0132] Specifically, the first condition and the second condition may be conditions set according to the 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 a first type SSB, the network device can set the demodulation reference signal of the broadcast channel of the first SSB to the first reference signal. When the network device determines that the first SSB is a second type SSB, the network device can set the demodulation reference signal of the broadcast channel of the first SSB to the second reference signal. The first terminal device can determine the type of the first SSB by the specific conditions satisfied by the demodulation reference signal of the broadcast channel of the first SSB.

[0133] 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;

[0134] The first scrambling sequence and the second scrambling sequence are different scrambling sequences.

[0135] Specifically, the first condition and the second condition may be conditions set according to different scrambling sequences of the broadcast channel. For example, 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. Therefore, when the network device determines that the first SSB is a first type SSB, the network device may set the scrambling sequence of the broadcast channel of the first SSB to the first scrambling sequence. When the network device determines that the first SSB is a second type SSB, the network device may set the scrambling sequence of the broadcast channel of the first SSB to the second scrambling sequence. The first terminal device may determine the type of the first SSB by the specific conditions satisfied by the scrambling sequence of the broadcast channel of the first SSB.

[0136] The following is an example. The first condition includes: the broadcast channel of the first SSB adopts the first scrambling sequence. At this time, the first SSB meets the first condition. The first terminal device determines that the first SSB is a first type SSB. The first type SSB is an SSB that the first terminal device can correctly interpret. Then, the first terminal device can access the network through the first SSB. The process of accessing the network through the SSB is described in detail in the aforementioned content. The second condition includes: the broadcast channel of the first SSB adopts the second scrambling sequence. At this time, the first SSB meets the second condition. The first terminal device determines that the first SSB is a second type SSB. The second type SSB is an SSB that the first terminal device cannot correctly interpret. Then, the first terminal device cannot access the network through the first SSB. The process of accessing the network through the SSB is described in detail in the aforementioned content. Therefore, in the embodiment of the present application, different types of SSBs can be distinguished by demodulating different scrambling sequences.

[0137] In some embodiments of the present application, in addition to performing the aforementioned step 101, the method for transmitting a synchronization signal block performed by the network device may further include the following steps:

[0138] The network device broadcasts a second SSB, wherein the second SSB is a first type SSB or a second type SSB.

[0139] In addition to broadcasting the first SSB, the network device can also broadcast the second SSB.

[0140] In some embodiments of the present application, in addition to performing the aforementioned steps 102 and 103, the synchronization signal block transmission method performed by the first terminal device may further include the following steps:

[0141] If it is determined that the first SSB is a first type SSB, the first terminal device determines whether a second SSB exists based on the first SSB, wherein the second SSB is the first type SSB or the second type SSB;

[0142] When the second SSB exists, the first terminal device receives the second SSB from the network device;

[0143] The first terminal device initiates random access to the network device according to the first SSB or the second SSB.

[0144] In which, the first terminal device receives the first SSB. If it is determined that the first SSB is a first type SSB, the first terminal device determines whether a second SSB exists based on the first SSB. When the second SSB exists, the first terminal device receives the second SSB from the network device. For example, the system information corresponding to the first SSB is used to indicate whether the second SSB exists. The first terminal device can determine whether the network device sends the second SSB based on the system information corresponding to the first SSB. For example, the first terminal device can determine whether the second SSB exists based on the indication information carried in the first SSB. For example, the first terminal device can determine whether the second SSB exists based on the synchronization sequence pattern carried in the first SSB, or the main MIB information in the PBCH, or the payload in the PBCH, or the DMRS of the PBCH. 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 based on the first SSB or the second SSB. That is, the first terminal device can access the network through the first SSB, or the first terminal device can access the network through the second SSB. The process of accessing the network through the SSB is described in detail in the above content. In an embodiment of the present application, the frequency domain positions of the first SSB and the second SSB may be the same or different, and this embodiment of the present application does not limit this.

[0145] Furthermore, 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:

[0146] The first terminal device determines the SSB used to access the network device based on the measurement amount of the first SSB and the measurement amount of the second SSB.

[0147] Among them, when the first terminal device chooses to use the first SSB or the second SSB for random access, the first terminal device can use the measurement amount of different SSBs as the basis for selecting the SSB. For example, the first terminal device selects the SSB based on the measurement amount of the first SSB and the measurement amount of the second SSB. Among them, the measurement amount of the SSB may include the reference signal receiving power (RSRP) or the reference signal receiving quality (RSRQ) of the SSB. The first terminal device selects the SSB with the best or better channel quality based on 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. After obtaining random access resources according to the system information, the random access process can be performed to improve the efficiency of the first terminal device accessing the network.

[0148] The random access process provided in the embodiment of the present application may include: a four-step random access process and a two-step random access process. For example, the four-step random access process includes:

[0149] Step 11: The first terminal device sends a preamble sequence to the network device. The first terminal device calculates a random access-radio network temporary identifier (RA-RNTI) based on the time-frequency resources used to send the preamble.

[0150] 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.

[0151] Step 13: The first terminal device receives a 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, the first terminal device considers the random access response to be a random access response for itself. After receiving the random access response, the first terminal device sends an uplink message on the allocated uplink resources according to the indication of the random access response.

[0152] 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 successfully accessed. The control information of the conflict resolution message is scrambled with the cell-radio network temporary identifier (C-RNTI). The network device uniquely identifies the first terminal device that successfully accessed in the conflict resolution message, and other first terminal devices that failed to successfully access will re-initiate random access.

[0153] For example, the two-step random access process includes:

[0154] Step 21: The first terminal device sends a preamble and data to the network device. The data may include an identifier of the first terminal device. The first terminal device calculates the RA-RNTI based on the time-frequency resources for sending the preamble.

[0155] 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 it to scramble the control information of the random access response. The random access response includes a unique identifier for the first terminal device, specifying the first terminal device that successfully accessed. Other first terminal devices that failed to successfully access will re-initiate random access. The random access response also includes the C-RNTI assigned to the first terminal device.

[0156] In some embodiments of the present application, in addition to performing the aforementioned step 101, the method for transmitting a synchronization signal block performed by the network device may further include the following steps:

[0157] The network device indicates at least one of the following through the first SSB: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB.

[0158] Accordingly, in some embodiments of the present application, in addition to performing the aforementioned steps 102 and 103, the synchronization signal block transmission method performed by the first terminal device may further include the following steps:

[0159] When there is a second SSB, the first terminal device determines at least one of the following based on the first SSB: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and configuration information of the synchronization signal sequence of the second SSB.

[0160] Among them, the first SSB can be used to indicate the time domain resource position of the second SSB, or the first SSB can also be used to indicate the frequency domain resource position of the second SSB, or the first SSB can also be used to indicate the configuration information of the synchronization signal sequence of the second SSB. Alternatively, the first SSB can also be used to indicate the time domain resource position of the second SSB and the frequency domain resource position of the second SSB, or the first SSB can also be used to indicate the time domain resource position 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 frequency domain resource position 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 time-frequency domain resource position of the second SSB and the configuration information of the synchronization signal sequence of the second SSB.

[0161] For example, in an embodiment of the present application, the first SSB may be used to directly indicate at least one of the following: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB. Alternatively, the first SSB indicates the configuration information of the control channel, which carries control information, and the control information is used to schedule the 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 position of the second SSB, the frequency domain resource position of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB. Alternatively, in an embodiment of the present application, the first SSB may be used to indirectly indicate (for example, the system information corresponding to the first SSB can be used to indicate) at least one of the following: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and the 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 receive the second SSB from the network device. After the first terminal device is synchronized with the first SSB, the first terminal device does not need to search for the synchronization signal again to obtain the second SSB and its corresponding system information, thereby saving the energy consumption of the first terminal device in searching for the SSB and blindly detecting the DCI.

[0162] 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 in which the second SSB is located, or,

[0163] The time domain resource position of the second SSB is indicated by at least one of a system frame number offset, a time slot offset, and a symbol offset of the second SSB relative to the first SSB.

[0164] Among them, the first SSB can be used to indicate the time domain resource position of the second SSB. Specifically, the network device can adopt 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 system information corresponding to the first SSB 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 the embodiment of the present application, the first terminal device can determine the time domain resource position of the second SSB by the system frame number, time slot and symbol where the second SSB is located.

[0165] Alternatively, the network device may adopt an indirect indication method (or a relative indication method), for example, the first SSB may indicate at least one of the system frame number offset, time slot offset and symbol offset of the second SSB relative to 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 first terminal device may determine the system frame number of the second SSB based on the system frame number of the first SSB and the system frame number offset of the second SSB relative to the first SSB. In the same way, the first terminal device may also determine the time slot and symbol of the second SSB. In the embodiment of the present application, the first terminal device may determine the time domain resource position of the second SSB by the time domain resource position 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.

[0166] Specifically, the frequency domain resource position of the second SSB can be indicated by an absolute or relative global synchronization channel number (GSCN), and the positional relationship between the GSCN number and the SSB starting frequency is indicated by the following Table 1. The frequency domain resource position can also be indicated by an absolute frequency or a relative offset, for example, indicating the starting frequency difference between the second SSB and the first SSB, and the unit of the frequency difference is Hertz (Hz).

[0167] The configuration information of the synchronization signal sequence of the second SSB can be represented by the sequence number (or index, identifier) ​​of the sequence pattern. For example, the protocol can stipulate 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 correspond one-to-one. The configuration information of the synchronization signal sequence of the second SSB can indicate one of the T1 sequence numbers. Based on this one sequence number, the synchronization signal sequence pattern of the second SSB can be determined.

[0168] Table 1

[0169]

[0170] Among them, * represents a multiplication operation.

[0171] In some embodiments of the present application, the first SSB is also used to indicate the period corresponding to the second SSB; or, it is also used to indicate the period corresponding to the second SSB and the valid time corresponding to the period.

[0172] Among them, the first SSB can also indicate the period corresponding to the second SSB, then the network device can send the second SSB according to the period corresponding to the second SSB, the first terminal device can determine the period corresponding to the second SSB through the first SSB, so that the first terminal device can receive the second SSB according to the period, thereby achieving the purpose of periodically sending the second SSB.

[0173] In addition, the first SSB indicates the period corresponding to the second SSB, and also indicates the valid time corresponding to the period. The network device can periodically send the second SSB within the valid time corresponding to the period, and the first terminal device can periodically receive the second SSB within the valid time corresponding to the period. After the valid time is exceeded, the network device no longer periodically sends the second SSB, or the period of the network device sending the second SSB changes. Similarly, after the valid time is exceeded, the first terminal device no longer periodically receives the second SSB, or the first terminal device no longer receives the second SSB according to the aforementioned indication information, thereby avoiding power consumption caused by the network device sending the second SSB multiple times, and power consumption caused by the first terminal device receiving the second SSB multiple times.

[0174] In some embodiments of the present application, in addition to performing the aforementioned step 101, the method for transmitting a synchronization signal block performed by the network device may further include the following steps:

[0175] 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.

[0176] Accordingly, in some embodiments of the present application, in addition to performing the aforementioned steps 102 and 103, the synchronization signal block transmission method performed by the first terminal device may further include the following steps:

[0177] When there is a second SSB, the first terminal device determines the information of the shared channel scheduled by the downlink control information corresponding to the second SSB based on the first SSB.

[0178] In an 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 shared channel scheduled by the downlink control information corresponding to the second SSB according to the indication of the first SSB, without having to obtain the shared channel scheduled by the downlink control information corresponding to the second SSB by receiving the second SSB, thereby reducing the overhead of the first terminal device in detecting the scheduling information of the shared channel.

[0179] To facilitate a better understanding and implementation of the above solutions of the embodiments of the present application, the following examples are given for specific description using corresponding application scenarios. The implementation details described in this scenario can be used in combination with the above method embodiments.

[0180] In this embodiment of the present application, a base station is used as the network device, a REDCAP terminal device is used as the first terminal device, and a legacy terminal device is used as the second terminal device. In addition to the existing SSB, the base station adds a new SSB dedicated to the REDCAP terminal device. This new SSB corresponds to a narrow beam, and the REDCAP terminal device can correctly interpret the new SSB, but the legacy terminal device cannot. The base station can also add indication information to the system information corresponding to the traditional SSB, allowing the REDCAP terminal device to receive the narrow beam and obtain the system information it carries with lower power consumption.

[0181] The following two embodiments are used to illustrate the present invention respectively.

[0182] Example 1

[0183] The embodiments of the present application provide a new SSB that is incapable of being correctly interpreted by legacy terminal devices. If this new SSB were to allow legacy terminal devices to access the network according to current protocols, it would cause confusion in time alignment. This is because, upon receiving an SSB, legacy terminal devices would determine the time position of the SSB according to the rules defined by the traditional protocol and then perform clock alignment with the base station. Therefore, in order to maintain the same processing behavior of legacy terminal devices regarding SSBs, the embodiments of the present application should prevent legacy terminal devices from correctly interpreting the new SSB.

[0184] Figure 2 A schematic diagram of a newly added SSB is provided in an embodiment of the present application. The beams marked as SSB-1 to SSB-4 correspond to the SSB indices 1-4 defined in the current protocol. SSB-1 to SSB-4 form an SSB set (burst). All SSBs in the SSB set are sent within 5 milliseconds (ms). The newly added SSBs can be arranged in the free time slots or symbols within the same SSB set period, for example Figure 2 The SSB-1', SSB-1", SSB-2', and SSB-4' in the figure are the beams corresponding to the newly added SSBs. The SSB numbering is only an example, and the relationship with the current SSB index is not limited. For the convenience of explanation, the two newly added beams close to the traditional SSB-1 are named SSB-1' and SSB-1", and the two beams close to the traditional SSB-2 and SSB-4 are named SSB-2' and SSB-4'.

[0185] Figure 3A schematic diagram of a newly added SSB corresponding to SIB1 provided in an embodiment of the present application. It can be seen from the foregoing content that there are multiple types of SSB, such as first-type SSB and second-type SSB, wherein the second-type SSB is a traditional SSB, and the first-type SSB is a newly added SSB. 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 a traditional terminal device or a REDCAP terminal device, the information in the first-type SIB1 can only be received by a REDCAP terminal device, and the information in the first-type SIB1 cannot be received by a traditional terminal device.

[0186] In the embodiments of the present application, the second type SSB is a traditional SSB, and the first type SSB is a newly added SSB. This scenario does not limit the embodiments of the present application. For example, the first type SSB and the second type SSB in the embodiments of the present application can be other types of SSB, such as two other newly added types of SSB. Moreover, whether the SSB type is newly added or existing does not limit the embodiments of the present application. The method of the embodiments of the present application is mainly for two types of SSB.

[0187] In one possible implementation, the process of a REDCAP terminal device searching the SSB until obtaining MIB information mainly includes the following steps:

[0188] Step 1: The terminal device identifies a frequency where SSB may be present and blindly detects the PSS symbol by symbol in the time domain. After detecting the PSS, it then blindly detects the SSS. Without prior information, the terminal device searches the time domain symbols one by one until it finds the synchronization signal. If the terminal device fails to find the synchronization signal on a frequency for a long period of time (e.g., greater than 80ms), it switches to another frequency where SSB may be present and detects the synchronization signal in the same manner. If a synchronization signal is detected, the cell ID is calculated based on the identifier (ID) represented by the PSS and SSS patterns.

[0189] Step 2: The terminal device detects PSS and SSS, and PSS, SSS and PBCH meet Figure 4 The relationship shown in Figure 2 shows that the terminal device receives the payload carried by the PBCH, which is scrambled by a sequence and has a DMRS sequence on the PBCH. Table 2 shows the time-frequency position of the DMRS on the PBCH. The DMRS sequence r(m) is generated as follows:

[0190]

[0191] c(n)=(x1(n+N C )+x2(n+N C ))mod 2,

[0192] N C =1600,

[0193] x1(n+31)=(x1(n+3)+x1(n))mod 2,

[0194] x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2.

[0195] Among them, the initialization parameter of c(n) is It is the SSB index or the high r bit value or low r bit value of the SSB index, where r is a positive integer, for example It is the high 3-bit value or the low 3-bit value of the SSB index. There are 8 different possibilities, so 8 different DMRS sequences can be formed. r(m) is the m-th element in the DMRS sequence, where m is an integer, and c(n) is the n-th element in the sequence c, where n is an integer. It is the cell ID where the SSB is located. When demodulating the DMRS sequence, the terminal device can try various possible sequences one by one until a DMRS sequence is confirmed.

[0196] Table 2

[0197]

[0198] Step 3: The terminal device performs channel estimation based on DMRS, decodes PBCH based on the channel estimation result, and then descrambles the decoded PBCH based on the scrambling code of PBCH, so as to obtain the payload of PBCH and the information carried on the payload. The scrambling rules of PBCH can be in, are the scrambled bits, b(0),…,b(M bit -1) is the bit before scrambling, c(n) is the scrambling sequence, and is calculated by the following formula.

[0199] c(n)=(x1(n+N C )+x2(n+N C ))mod 2,

[0200] x1(n+31)=(x1(n+3)+x1(n))mod 2,

[0201] x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2,

[0202] N C =1600,

[0203] The value of v can be a decimal and / or an integer.

[0204] In the embodiment of the present application, the base station can broadcast a newly added SSB, so that traditional terminal devices cannot correctly interpret the newly added SSB. REDCAP terminal devices can interpret the newly added SSB. For the specific steps of the REDCAP terminal device interpreting the SSB, please refer to steps 1 to 4 above. There are many ways to implement the newly added SSB, and examples are as follows:

[0205] One way to implement a newly added SSB may be that the base station changes the synchronization sequence of the sent PSS and / or SSS. In an embodiment of the present application, a new synchronization sequence can be set for the newly added SSB, so that traditional terminal devices cannot use the new synchronization sequence to synchronize with the base station, and thus cannot receive the newly added SSB.

[0206] One way to implement the newly added SSB is that the base station can set a new DMRS sequence for the PBCH for the newly added SSB, so that the traditional terminal device cannot recognize the new DMRS sequence. For example, the initialization parameters of the above DMRS sequence can be changed. For example, the following item can be added to the initialization parameters of the above c(n) Its value can be It can also be other predefined numbers or Related numbers. The initialization parameters of c(n) can be:

[0207]

[0208] Through this method, the REDCAP terminal device can detect the DMRS sequence and determine the The index of the newly added SSB is then determined. Traditional terminal devices cannot correctly identify the new DMRS sequence, and therefore cannot correctly demodulate the PBCH, and therefore cannot obtain the MIB in the SIB.

[0209] It is understandable that the above-mentioned c in the embodiment of the present application int The right side of the equation This is just an example of a feasible way, not limited to: It can also be replaced by other parameters, such as and Other values ​​other than , for example, can be replaced by

[0210] For example, the base station can set a new scrambling sequence for PBCH so that traditional terminal devices cannot descramble the PBCH payload. One feasible way is to add a new scrambling sequence, for example, Modified to X is a positive integer. Another feasible way is to modify the scrambling rule. For example, in the above method, the scrambling rule is The following new scrambling rules are adopted in the embodiments of the present application: That is, you can Alternatively, both methods can be used to set a new scrambling sequence.

[0211] In the above example, the REDCAP terminal device can use the above new scrambling sequence to correctly descramble the PBCH payload and obtain the MIB it carries, while the traditional terminal device cannot correctly descramble the PBCH and therefore cannot obtain the MIB.

[0212] In current technology, all terminal devices use the same set of rules to search for SSBs and obtain system information. If this rule is still used, both types of terminal devices will be able to access the newly added SSBs. Access to the newly added SSBs by traditional terminal devices will cause clock alignment confusion. Through the solution of Example 1, traditional terminal devices are unable to correctly interpret the newly added SSBs. Example 1 adopts new synchronization sequences, new DMRS sequences, new scrambling sequences, etc. to prevent traditional terminal devices from correctly interpreting the newly added SSBs. REDCAP terminal devices can correctly interpret the newly added SSBs based on the new synchronization sequences, new DMRS sequences, new scrambling sequences, etc. The purpose of preventing traditional terminal devices from accessing from the newly added SSBs and allowing REDCAP terminal devices to access from the newly added SSBs according to the new rules is achieved.

[0213] Example 2

[0214] In the embodiments of the present application, since the beams used and the time positions of the newly added SSBs can be implemented by the base station, there is uncertainty. For example, one or more newly added SSBs may only exist in part of the SSB cycle, and the terminal device may not retrieve the optimal or relatively good narrowband SSB in part of the cycle. Therefore, when a REDCAP terminal device accesses the network from an existing SSB or a newly added SSB, the base station can broadcast indication information, allowing the REDCAP terminal device to detect one or more newly added SSBs near the current SSB beam with lower energy consumption.

[0215] like Figure 5As shown, the REDCAP terminal device access network process provided in the embodiment of the present application takes the second type SSB as the traditional SSB and the first type SSB as the newly added SSB as an example, including:

[0216] Step 1: The REDCAP terminal device searches for SSBs symbol by symbol, synchronizes with an SSB, and obtains system information through the SSB. Alternatively, the REDCAP terminal device can scan multiple SSBs in the SSB cycle, select an SSB with the highest or higher received power, and read information about the SSB, such as its index and / or the SIB1 corresponding to the SSB. If the SSB received or selected by the REDCAP terminal device is a legacy SSB, step 2-1 is executed; otherwise, step 2-2 is executed.

[0217] Step 2-1: The REDCAP terminal device reads the SIB1 corresponding to the SSB, which includes the 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 information about random access resources. The terminal device may determine whether it is necessary to detect other SSBs based on the received power of the SSB searched in step 1. The embodiment of the present application does not limit the method of detecting SSBs by the terminal device. If the REDCAP terminal device determines to initiate random access from a traditional SSB, it jumps to step 6-2. If the REDCAP terminal device determines that it is necessary to detect other SSBs, it proceeds to step 3-1.

[0218] Step 3-1: The REDCAP terminal device determines whether the newly added SSB corresponds to the existing SSB according to the received SIB1. If there is no corresponding newly added SSB, it jumps to step 6-2. Otherwise, it executes step 4-1.

[0219] Step 4-1: The REDCAP terminal receives the newly added SSB at the corresponding time-frequency position according to the instructions of SIB1 and detects its key indicators, such as RSRP. Jump to step 5.

[0220] Step 2-2: When the SSB received or selected by the REDCAP terminal device is a newly added SSB, the REDCAP terminal device reads the newly added SIB1 corresponding to the newly added SSB. The newly added SIB1 may include information about other traditional SSBs related to the newly added SSB, such as other traditional SSBs near the newly added SSB beam. The REDCAP terminal device can determine whether to detect other SSBs or traditional SSBs based on the received power of the searched SSB. If the REDCAP terminal device determines to initiate random access from the traditional SSB, it jumps to step 6-2. If it determines that it is necessary to detect other SSBs or traditional SSBs, it proceeds to step 3-2.

[0221] Step 3-2: The REDCAP terminal receives other SSBs or traditional SSBs at the corresponding time positions according to the newly added SIB1 instructions and detects their key indicators, such as RSRP. Then, proceed to step 5.

[0222] Step 5: The REDCAP terminal device determines whether the newly added SSB reception performance is better than the traditional SSB reception performance. If so, it proceeds to step 6-1. Otherwise, it jumps to step 6-2.

[0223] 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 uses the RO to send message 1 or message A (Msg1 / MsgA).

[0224] Step 6-2: The REDCAP terminal device initiates random access from the traditional SSB. The traditional SIB1 corresponds to RO, and uses the RO to send Msg1 / MsgA.

[0225] 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 relevant information of other traditional SSBs and / or newly added SSBs related to the SSB, such as whether other SSBs exist near the SSB beam, and when other SSBs exist, the time-frequency locations of these SSBs. In this embodiment, other SSBs are SSBs relative to the currently received SSB, such as Figure 6 The current SIB1 shown indicates a schematic diagram of other SSBs and other SIB1s, wherein the first SSB schedules the current SIB1 and the second SSB schedules other SIB1s.

[0226] In one possible implementation, if other SSBs are usually at the same frequency position as the current SSB, the time position of the other SSBs may be indicated instead of the frequency domain position of the other SSBs. Figure 6The RO in the RO represents the way in which a random access opportunity (physical random access channel (PRACH) occasion) indicates the time position of one or more other SSBs in SIB1, which can be any of the following methods:

[0227] Method 1: By indicating the absolute time position, optionally indicating the period, or indicating the period and the effective time. For example, the time position of other SSBs can be indicated by the "system frame number + time slot (slot) + symbol" method. Figure 7 For example, the current SSB and SIB1 are in frame-1. In SIB1, the system frame number of frame-3, as well as 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 at the third symbol of the fourth time slot in the frame. Figure 8 As shown, 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 terminal device can determine the time positions of the other SSBs based on the indicated first SSB time position and period-1 and period-2. 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.

[0228] Method 2: Indicate by relative time position (time slot + symbol offset relative to the first SSB), optionally indicating the period, or indicating the period and effective time. For example, the time position of other SSBs is indicated by the "number of frames + time slot position + symbol position" method. Figure 8 For example, SIB1 indicates that the number of frames of difference is 2, the SSB is in the time slot position 4 in the frame, and the symbol position in the time slot is 3. Another feasible implementation is to directly indicate the difference in "number of frames + symbol position" or the number of symbols of difference through the positional relationship between the frame, time slot, and symbol.

[0229] Optionally, cycle-1 and cycle-2 may also be indicated, for example, cycle-1 is 4 time slots and cycle-2 is 1 frame. The terminal device may determine the time positions of the other SSBs based on the indicated first SSB time position and cycle-1 and cycle-2. Optionally, the validity period of the cycle may also be indicated, for example, the validity period is 4 frames, after which the indicated cycle is considered invalid.

[0230] The embodiment of the present application can indicate the information in the DCI corresponding to other SSBs in the current SIB1, as well as the time slot where the DCI is located. After the terminal device detects other SSBs, it does not need to blindly detect the DCI again to obtain the PDSCH scheduled by the DCI and demodulate the SIB1 carried thereon, such as Figure 6 The method of indicating the time slot in which the DCI is located is the same as that of "Method 1" or "Method 2" described above. The fields included in the downlink control information (DCI) scrambled by the system information-radionetwork temporary indicator (SI-RNTI) are shown in Table 3.

[0231] Table 3

[0232]

[0233] In the second embodiment, after the REDCAP terminal device is synchronized with the current SSB, it can obtain other SSBs and their corresponding SIB1s without searching for the synchronization signal and the public search space again, saving energy consumption of searching for SSBs and blindly detecting DCI.

[0234] The embodiment of the present application sets the aforementioned indication information so that 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.

[0235] In an embodiment of the present application, the REDCAP terminal device indicates the time position of the second SSB and the PDSCH scheduling information of the second SSB corresponding to the SIB1 in the SIB1 corresponding to the current first SSB, so that the REDCAP terminal device can obtain the PDSCH of the SIB1 corresponding to the second SSB without searching for the second SSB and blindly detecting the PDSCH scheduling information of the SIB1 corresponding to the second SSB, thereby achieving the purpose of reducing the power consumption of the REDCAP terminal device.

[0236] In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspectives of network devices, terminal devices, and the interaction between network devices and terminal devices. In order to implement the various functions in the methods provided in the embodiments of the present application, the network devices and terminal devices may include hardware structures and / or software modules to implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. Whether a function in the above functions is executed in the form of hardware structures, software modules, or hardware structures plus software modules depends on the specific application and configuration constraints of the technical solution.

[0237] In order to better implement the above-mentioned solutions of the embodiments of the present application, relevant devices for implementing the above-mentioned solutions are also provided below.

[0238] See also Figure 9 As shown, an embodiment of the present application provides a device. The device can be a terminal device, a device in a terminal device, or a device that can be used in conjunction with a terminal device. Figure 9 For example, the terminal device 900 may include a transceiver module 901 and a processing module 902 .

[0239] In one possible implementation:

[0240] a transceiver module, configured to receive a first synchronization signal block (SSB) from a network device, where 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 SSBs;

[0241] A processing module is used to determine that the first SSB is the first type SSB if the first SSB meets a first condition; or to determine that the first SSB is the second type SSB if the first SSB meets a second condition.

[0242] In one possible implementation:

[0243] 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 are different synchronization signal sequences.

[0244] In one possible implementation:

[0245] The first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a first reference signal, and the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a second reference signal; wherein, the first reference signal and the second reference signal are different demodulation reference signals.

[0246] In one possible implementation, the initialization parameter of the first reference signal is

[0247]

[0248] The initialization parameter of the second reference signal is

[0249]

[0250] in, It is the SSB index or the high r bit value or low r bit value of the SSB index, where r is a positive integer, for example It is the high 3-bit value or the low 3-bit value of the SSB index. There are 8 different possibilities, so 8 different DMRS sequences can be formed. r(m) is the m-th element in the DMRS sequence, where m is an integer, and c(n) is the n-th element in the sequence c, where n is an integer. Is the cell ID where the SSB is located. Add the following item to the initialization parameters of the second reference signal Its value can be It can also be other predefined numbers or The related numbers can be used to obtain the initialization parameters of the first reference signal.

[0251] In one possible implementation:

[0252] The first condition includes: the scrambling sequence of the broadcast channel of the first SSB is a first scrambling sequence, and the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is a second scrambling sequence; wherein, the first scrambling sequence and the second scrambling sequence are different scrambling sequences.

[0253] In a possible implementation, the initialization sequence or initial value of the first scrambling sequence is The initialization sequence or initial value of the second scrambling sequence is

[0254] in, is the cell ID where SSB is located, X is a positive integer, and the above is An initialization sequence or an initial value of the first scrambling sequence may be obtained.

[0255] In one possible implementation, the first condition includes: the scrambling rule of the broadcast channel of the first SSB is a first scrambling rule, and the second condition includes: the scrambling rule of the broadcast channel of the first SSB is a second scrambling rule; wherein the first scrambling rule and the second scrambling rule are different scrambling rules. In the above solution, the signaling overhead for indicating the type of the SSB can be saved.

[0256] In a possible implementation, the first scrambling rule is

[0257] The second scrambling rule is

[0258] 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, and the value of n is i+v*M bit The value of v can be a decimal and / or an integer. By adding a "+1" term to the equation of the second scrambling rule, the first scrambling rule can be obtained. The first scrambling rule and the second scrambling rule are different scrambling rules.

[0259] In one possible implementation:

[0260] If it is determined that the first SSB is the first type SSB, a processing module is configured to determine whether a second SSB exists based on the first SSB, wherein the second SSB is the first type SSB or the second type SSB;

[0261] a transceiver module, configured to receive the second SSB from the network device when the second SSB exists;

[0262] A processing module is used to initiate random access to the network device according to the first SSB or the second SSB.

[0263] In one possible implementation:

[0264] A processing module is used to determine the SSB used to access the network device based on the measurement amount of the first SSB and the measurement amount of the second SSB.

[0265] In one possible implementation:

[0266] A processing module is used to determine at least one of the following based on the first SSB when the second SSB exists: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and the synchronization signal sequence of the second SSB.

[0267] In one possible implementation:

[0268] The time domain resource position of the second SSB is indicated by at least one of the system frame number, time slot and symbol in which the second SSB is located, or the time domain resource position of the second SSB is indicated by at least one of the system frame number offset, time slot offset and symbol offset of the second SSB relative to the first SSB.

[0269] In one possible implementation:

[0270] The first SSB is further used to indicate the period corresponding to the second SSB; or, it is further used to indicate the period corresponding to the second SSB and the valid time corresponding to the period.

[0271] In one possible implementation:

[0272] A processing module is used to determine the information of the shared channel scheduled by the downlink control information corresponding to the second SSB according to the first SSB when the second SSB exists.

[0273] See also Figure 10 As shown, an embodiment of the present application provides a device. The device can be a network device, a device in a network device, or a device that can be used in conjunction with a network device. Figure 10 The network device 1000 is used as an example. The network device 1000 may include a transceiver module 1001 and a processing module 1002 .

[0274] In one possible implementation:

[0275] A processing module, configured to broadcast a first SSB through the transceiver module;

[0276] 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 SSBs;

[0277] When the first SSB is the first type SSB, the first SSB satisfies a first condition,

[0278] When the first SSB is the second type SSB, the first SSB satisfies the second condition.

[0279] In one possible implementation:

[0280] 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 are different synchronization signal sequences.

[0281] In one possible implementation:

[0282] The first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a first reference signal, and the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a second reference signal; wherein, the first reference signal and the second reference signal are different demodulation reference signals.

[0283] In one possible implementation:

[0284] The first condition includes: the scrambling sequence of the broadcast channel of the first SSB is a first scrambling sequence, and the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is a second scrambling sequence; wherein, the first scrambling sequence and the second scrambling sequence are different scrambling sequences.

[0285] In one possible implementation:

[0286] A processing module is used to broadcast a second SSB through the transceiver module, wherein the second SSB is the first type SSB or the second type SSB.

[0287] In one possible implementation:

[0288] A processing module is used to determine at least one of the following based on the first SSB: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and the synchronization signal sequence of the second SSB.

[0289] In one possible implementation:

[0290] The time domain resource location of the second SSB is indicated by at least one of a system frame number, a time slot, and a symbol in which the second SSB is located, or,

[0291] The time domain resource position of the second SSB is indicated by at least one of a system frame number offset, a time slot offset and a symbol offset of the second SSB relative to the first SSB.

[0292] In one possible implementation:

[0293] The first SSB is further used to indicate the period corresponding to the second SSB; or, it is further used to indicate the period corresponding to the second SSB and the valid time corresponding to the period.

[0294] In one possible implementation:

[0295] A processing module is used to determine the information of the shared channel scheduled by the downlink control information corresponding to the second SSB based on the first SSB.

[0296] For the introduction of the first SSB, the first type SSB, and the second type SSB, please refer to the previous method embodiment and will not be repeated here.

[0297] The division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0298] like Figure 11The device 1100 provided in an embodiment of the present application is shown, and is used to implement the functions of the terminal device in the above method. The device can be a terminal device, a device within a terminal device, or a device capable of being used in conjunction with a terminal device. The device can be a chip system. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete components.

[0299] The apparatus 1100 includes at least one processor 1120 configured to implement the functions of the terminal device in the method provided in the embodiment of the present application. For example, the processor 1120 may receive downlink control information and other information and parse the information. For details, see the detailed description in the method example, which will not be repeated here.

[0300] The device 1100 may also include at least one memory 1130 for storing program instructions and / or data. The memory 1130 is coupled to the processor 1120. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 1120 may operate in conjunction 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 device 1100 may also include a communication interface, which has multiple implementation methods. For example, the communication interface may be a transceiver, an interface, a bus, a circuit, a pin or a device capable of implementing transceiver functions. Figure 11 In the example, the communication interface is illustrated as a transceiver 1110, which is used to communicate with other devices via a transmission medium, so that the device in the device 1100 can communicate with other devices. For example, the other device can be a network device. The processor 1120 uses the transceiver 1110 to send and receive data and is used to implement Figure 1 、 Figure 5 The method executed by the terminal device described in the corresponding embodiment.

[0301] The specific connection medium between the transceiver 1110, the processor 1120 and the memory 1130 is not limited in the embodiment of the present application. Figure 11 The memory 1130, the processor 1120 and the transceiver 1110 are connected via a bus 1140. Figure 11 The connections between the other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, Figure 11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0302] like Figure 12 The device 1200 provided in an embodiment of the present application is shown, which is used to implement the functions of the network device in the above method. The device can be a network device, a device in a network device, or a device that can be used in conjunction with a network device. The device can be a chip system. The device 1200 includes at least one processor 1220, which is used to implement the functions of the network device in the method provided in an embodiment of the present application. Exemplarily, the processor 1220 can generate and send information such as downlink control information. For details, please refer to the detailed description in the method example, which is not repeated here.

[0303] Device 1200 may also include at least one memory 1230 for storing program instructions and / or data. Memory 1230 is coupled to processor 1220. Coupling, as used in the embodiments of the present application, refers to an indirect coupling or communication connection between devices, units, or modules, and may be electrical, mechanical, or other forms, for information exchange between the devices, units, or modules. Processor 1220 may operate in conjunction with memory 1230.

[0304] The processor 1220 may execute program instructions stored in the memory 1230. At least one of the at least one memory may be included in the processor. The device 1200 may also include a communication interface. The communication interface may be implemented in various ways. For example, the communication interface may be a transceiver, an interface, a bus, a circuit, or a device capable of implementing transceiver functions. Figure 12 In the example, the communication interface is illustrated as the transceiver 1210, which is used to communicate with other devices through a transmission medium, so that the device in the device 1200 can communicate with other devices. For example, the other device can be a terminal device. The processor 1220 uses the transceiver 1210 to send and receive data and is used to implement Figure 1 、 Figure 5 The method executed by the network device described in the corresponding embodiment.

[0305] The specific connection medium between the transceiver 1210, the processor 1220 and the memory 1230 is not limited in the embodiment of the present application. Figure 12 The memory 1230, the processor 1220 and the transceiver 1210 are connected via a bus 1240. Figure 12 The connections between the other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, Figure 12 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0306] In the embodiments 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, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0307] In an 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 a volatile memory (volatile memory), such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in an embodiment of the present application may also be a circuit or any other device that can implement a storage function, for storing program instructions and / or data.

[0308] The technical solutions provided in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium.

[0309] In the embodiments of the present application, under the premise that there is no logical contradiction, the embodiments may reference each other, for example, the methods and / or terms between method embodiments may reference each other, for example, the functions and / or terms between device embodiments may reference each other, for example, the functions and / or terms between device embodiments and method embodiments may reference each other.

[0310] Obviously, those skilled in the art may 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 intended to include these modifications and variations.

Claims

1. A method for transmitting a synchronization signal block (SSB), characterized in that: include: 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 SSBs; If the first SSB satisfies a first condition, determining that the first SSB is the first type SSB; If the first SSB satisfies a second condition, determining that the first SSB is the second type SSB; Among them, the first condition and the second condition are conditions set according to the SSB type that the network device needs to send, and there is a one-to-one correspondence between different conditions and SSB types.

2. The method according to claim 1, characterized in that The first condition includes: the synchronization signal sequence of the first SSB is a first sequence; the second condition includes: the synchronization signal sequence of the first SSB is a second sequence; The first sequence and the second sequence are different synchronization signal sequences.

3. The method according to claim 1 or 2, characterized in that The first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a first reference signal; the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a second reference signal; The first reference signal and the second reference signal are different demodulation reference signals.

4. The method according to any one of claims 1 to 2, characterized in that The first condition includes: the scrambling sequence of the broadcast channel of the first SSB is a first scrambling sequence; the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is a second scrambling sequence; The first scrambling sequence and the second scrambling sequence are different scrambling sequences.

5. The method according to any one of claims 1 to 2, characterized in that If it is determined that the first SSB is the first type SSB, the method further includes: 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; When the second SSB exists, receiving the second SSB from the network device; Initiate random access to the network device according to the first SSB or the second SSB.

6. The method according to claim 5, characterized in that The initiating random access to the network device according to the first SSB or the second SSB includes: Determine the SSB used to access the network device based on the measurement value of the first SSB and the measurement value of the second SSB.

7. The method according to claim 5, characterized in that The method further comprises: When the second SSB exists, at least one of the following is determined based on the first SSB: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB.

8. The method according to claim 7, characterized in that The time domain resource location of the second SSB is indicated by at least one of a system frame number, a time slot, and a symbol in which the second SSB is located, or, The time domain resource position of the second SSB is indicated by at least one of a system frame number offset, a time slot offset and a symbol offset of the second SSB relative to the first SSB.

9. The method according to claim 5, characterized in that The first SSB is further used to indicate the period corresponding to the second SSB; or, it is further used to indicate the period corresponding to the second SSB and the valid time corresponding to the period.

10. The method according to claim 5, characterized in that 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.

11. A method for transmitting a synchronization signal block (SSB), characterized in that: include: Broadcast first SSB; 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 SSBs; When the first SSB is the first type SSB, the first SSB satisfies a first condition, When the first SSB is the second type SSB, the first SSB satisfies the second condition, Among them, the first condition and the second condition are conditions set according to the SSB type that the network device needs to send, and there is a one-to-one correspondence between different conditions and SSB types.

12. The method according to claim 11, characterized in that The first condition includes: the synchronization signal sequence of the first SSB is a first sequence; the second condition includes: the synchronization signal sequence of the first SSB is a second sequence; The first sequence and the second sequence are different synchronization signal sequences.

13. The method according to claim 11 or 12, characterized in that The first condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a first reference signal; the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB is a second reference signal; The first reference signal and the second reference signal are different demodulation reference signals.

14. The method according to any one of claims 11 to 12, characterized in that The first condition includes: the scrambling sequence of the broadcast channel of the first SSB is a first scrambling sequence; the second condition includes: the scrambling sequence of the broadcast channel of the first SSB is a second scrambling sequence; The first scrambling sequence and the second scrambling sequence are different scrambling sequences.

15. The method according to any one of claims 11 to 12, characterized in that The method further comprises: A second SSB is broadcast, wherein the second SSB is the first type SSB or the second type SSB.

16. The method according to claim 15, characterized in that The first SSB is used to indicate at least one of the following: the time domain resource position of the second SSB, the frequency domain resource position of the second SSB, and configuration information of the synchronization signal sequence of the second SSB.

17. The method according to claim 16, characterized in that The time domain resource location of the second SSB is indicated by at least one of a system frame number, a time slot, and a symbol in which the second SSB is located, or, The time domain resource position of the second SSB is indicated by at least one of a system frame number offset, a time slot offset and a symbol offset of the second SSB relative to the first SSB.

18. The method according to claim 15, characterized in that The first SSB is further used to indicate the period corresponding to the second SSB; or, it is further used to indicate the period corresponding to the second SSB and the valid time corresponding to the period.

19. The method according to claim 15, characterized in that The first SSB is also used to indicate information of a shared channel scheduled by downlink control information corresponding to the second SSB.

20. A communication device, characterized in that: The method comprises means for implementing the method according to any one of claims 1 to 19.

21. A communication device, characterized in that The device includes a processor and a memory, the memory and the processor are coupled, and the processor is used to execute the method according to any one of claims 1 to 19.

22. A computer-readable storage medium comprising instructions, which, when executed on a computer, causes the computer to perform the method according to any one of claims 1 to 19.

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