CN114071686A

CN114071686A - Transmission method and communication device for synchronous signal block

Info

Publication number: CN114071686A
Application number: CN202010762152.0A
Authority: CN
Inventors: 张云昊; 徐修强; 吴艺群
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-02-18
Also published as: WO2022022610A1

Abstract

The embodiment of the application discloses a transmission method and a communication device of a synchronous signal block, wherein the method comprises the following steps: 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; determining that the first SSB is the first type SSB if the first SSB satisfies a first condition; or, if the first SSB satisfies a second condition, determining that the first SSB is the second type SSB.

Description

Transmission method and communication device for synchronous signal block

Technical Field

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

Background

In order to cope with the explosive mobile data traffic increase, the connection of massive mobile communication devices, and various new services and application scenarios which are continuously emerging, a fifth generation (5th generation, 5G) mobile communication system is in operation. For example, three major application scenarios are defined in the 5G mobile communication system: enhanced mobile broadband (eMBB) scenarios, high-reliability and low-latency communications (URLLC) scenarios, and massive machine type communications (mtc) scenarios.

Exemplary, an eMBB scenario includes: ultra high definition video, Augmented Reality (AR), and/or Virtual Reality (VR), among others. The main characteristics of these services may be large transmission data volume and high transmission rate. URLLC scenarios include: haptic interaction-like applications such as wireless control in industrial manufacturing or production processes, motion control of unmanned vehicles or airplanes, remote repair of unmanned vehicles or airplanes, and/or remote surgery. The main features of these services may be the requirement of ultra-high reliability and low latency of the transmission. Furthermore, the characteristics of these services may include a small amount of data to be transmitted and/or burstiness. The mMTC scenario includes: smart grid power distribution automation, communication of wearable devices, and/or smart cities, etc. The main features of these services may be the large number of networked devices and/or the small amount of data transferred. Furthermore, terminal devices in an mtc scenario may need to meet the requirements of low cost and relatively long standby time.

Disclosure of Invention

The embodiment of the application provides a transmission method and a communication device of a synchronization signal block, which are used for determining different types of SSBs (service side Bs) by terminal equipment, so that one or more types of terminal equipment can be accessed to the different types of SSBs according to service needs or channel states, and a better network service is obtained or a better transmission capability is obtained.

In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

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 SSBs; determining that the first SSB is the first type SSB if the first SSB satisfies a first condition; or, if the first SSB satisfies a second condition, determining that the first SSB is the second type SSB.

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

In one possible implementation, the first condition includes: the synchronization signal sequence of the first SSB is a first sequence, and the second condition includes: the synchronization signal sequence of the first SSB is a second sequence, wherein the first sequence and the second sequence are different synchronization signal sequences. In the above scheme, different types of SSBs can be distinguished by the difference of the synchronization signal sequences, so that signaling overhead for indicating the types of SSBs can be saved.

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, and the second condition includes: a demodulation reference signal of a 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 scheme, the first terminal device may determine the type of the first SSB according to a specific condition that is satisfied by the demodulation reference signal of the broadcast channel of the first SSB, so that signaling overhead for indicating the type of the SSB may be saved.

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

the initialization parameters of the second reference signal are as follows:

wherein the content of the first and second substances,

is an SSB index (index) or is an upper r-bit value or a lower r-bit value of the SSB index, where r is a positive integer, e.g.

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

Is the cell ID where the SSB is located.

Can take on values of

Or other predefined numbers or

The number of correlations.

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 non-identical scrambling sequences.

In the above scheme, the first terminal device may determine the type of the first SSB according to a specific condition that is satisfied by a scrambling sequence of a broadcast channel of the first SSB, so that signaling overhead for indicating the type of the SSB may be saved.

In one 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

Wherein the content of the first and second substances,

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

In one possible implementation, the first condition includes: a scrambling rule of a 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 scheme, signaling overhead for indicating the type of SSB can be saved.

In one possible implementation, the first scrambling rule is

The second scrambling rule is

Wherein b (i) represents a value of an i-th bit before scrambling,

representing the value of the ith bit after scrambling, c (n) being the scrambling sequence, c (n) being determined by the Cell identity (Cell ID), n being taken to be i + v M_bitV can take on a decimal number and/or can be an integer. The equation in the second scrambling rule is newly added with a term of "+ 1" so that the first scrambling rule can be obtained, and the first scrambling rule and the second scrambling rule are different scrambling rules.

In one possible implementation, if it is determined that the first SSB is the first type SSB, the method further comprises: determining whether a second SSB exists according to the first SSB, wherein the second SSB is the first type SSB or the second type SSB; receiving the second SSB from the network device when the second SSB is present; and initiating random access to the network equipment according to the first SSB or the second SSB.

In one possible implementation, the initiating random access to the network device according to the first SSB or the second SSB includes: and determining the SSB for accessing the network equipment according to the measurement quantity of the first SSB and the measurement quantity of the second SSB.

In the above scheme, the first terminal device selects the SSB with the best or better channel quality according to the measurement quantity of the first SSB and the measurement quantity of the second SSB, and after accessing the network through the SSB, the first terminal device may obtain system information, and after obtaining the random access resource according to the system information, may perform a random access procedure to improve the efficiency of the first terminal device accessing the network.

In one possible implementation, the method further comprises: when the second SSB is present, determining at least one of the following from 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 scheme, the first terminal device may obtain the information of the second SSB through the first SSB, and the information may be used to receive the information of the second SSB, thereby saving power consumption of the first terminal device in searching for the SSB.

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

In the above scheme, the first SSB may be used to indicate the time domain resource location of the second SSB. Specifically, the network device may adopt a direct indication mode (or a mode called as absolute indication), for example, the first SSB indicates at least one of a system frame number, a timeslot, and a symbol where the second SSB is located, or the system information corresponding to the first SSB indicates a system frame number of the second SSB, and the first terminal device may obtain the system frame number of the second SSB from the system information. Alternatively, the network device may use an indirect indication manner (or referred to as a relative indication manner), for example, the first SSB may indicate at least one of a system frame number offset, a timeslot offset, and a symbol offset of the second SSB with respect 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 may acquire the system frame number offset of the first SSB and the system frame number of the first SSB from the system information, so as to determine the system frame number of the second SSB. The method can save power consumption of the first terminal device for searching the second SSB.

In a possible implementation, the first SSB is further configured to indicate a period corresponding to the second SSB; or, the apparatus is further configured to indicate a period corresponding to the second SSB and a valid time corresponding to the period.

In the above scheme, the first SSB may further indicate a period corresponding to the second SSB, and the first terminal device may determine the period corresponding to the second SSB through the first SSB, so that the first terminal device may receive the second SSB according to the period. In addition, the first SSB indicates a period corresponding to the second SSB and also indicates an effective time corresponding to the period, the first terminal device may periodically receive the second SSB within the effective time corresponding to the period, and after the effective time is exceeded, the network device does not periodically send the second SSB any more, or the period in which the network device sends the second SSB changes. The method can save power consumption of the first terminal device for searching the second SSB.

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

In one possible implementation, the method further comprises: and when the second SSB exists, determining the information of the shared channel scheduled by the downlink control information corresponding to the second SSB according to the first SSB. In the above scheme, after receiving the first SSB, the first terminal device may obtain the shared channel scheduled by the downlink control information corresponding to the second SSB according to the indication of the first SSB, and does not need to obtain the shared channel scheduled by the downlink control information corresponding to the second SSB by receiving the second SSB, so that the overhead of the first terminal device detecting the scheduling information of the shared channel may be reduced.

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

For the description of the first condition and the second condition, please refer to the first aspect, which is not described herein.

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

For the introduction of the second SSB, please refer to the first aspect, which is not described herein.

In a third aspect, an apparatus is provided in an embodiment of the present application, where the apparatus may be a terminal device, or an apparatus in a terminal device, or an apparatus capable of being used in cooperation with a terminal device. In one configuration, the apparatus may include a module corresponding to one of the methods/operations/steps/actions described in the first aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one configuration, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,

in one possible implementation:

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;

a processing module for determining that the first SSB is the first type SSB if the first SSB satisfies a first condition; or, if the first SSB satisfies a second condition, determining that the first SSB is the second type SSB.

For an introduction of the first condition and the second condition, please refer to the first aspect, which is not described herein.

In one possible implementation:

if the first SSB is determined to be the first type SSB, a processing module for 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;

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

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

For an introduction of the second SSB, please refer to the first aspect, which is not described herein.

In a fourth aspect, an apparatus is provided in this embodiment, where the apparatus may be a network device, an apparatus in a network device, or an apparatus capable of being used in cooperation with a network device. In one configuration, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one configuration, the apparatus may include a processing module and a transceiver module. In an exemplary manner, the first and second electrodes are,

in one possible implementation:

the processing module is used for broadcasting the first SSB through the transceiving module;

wherein the first SSB is a first type SSB or a second type SSB, the first type SSB and the second type SSB being different types of SSB;

the first SSB satisfies a first condition when the first SSB is the first type SSB,

the first SSB satisfies a second condition when the first SSB is the second type SSB.

In one possible implementation:

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

In a fifth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the first aspect. Optionally, the apparatus may further comprise a memory for storing instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the first aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

and a processor, configured to perform the steps in the foregoing first aspect by using the communication interface, which is not limited in detail here.

In a fifth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the second aspect. Optionally, the apparatus may further comprise a memory for storing instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the second aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be terminal devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

and a processor, configured to perform the steps in the foregoing second aspect by using the communication interface, which is not limited in detail here.

In a seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method according to any one of the first aspect to the second aspect.

In an eighth aspect, this application further provides a computer program product, which includes instructions that, when executed on a computer, cause the computer to perform the method of any one of the first aspect to the second aspect.

In a ninth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method according to any one of the first aspect to the second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a ninth aspect, the present application provides a system, which includes the apparatus of the third aspect or the apparatus of the fifth aspect, and the apparatus of the fourth aspect or the apparatus of the sixth aspect.

Drawings

Fig. 1 is an interactive flowchart illustrating a method for transmitting a synchronization signal block according to an embodiment of the present disclosure;

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

FIG. 3 is a diagram of an SIB1 corresponding to a newly added SSB according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a relationship between PSS, SSS, and PBCH in an SSB according to an embodiment of the present disclosure;

fig. 5 is a schematic flowchart of an access network of a REDCAP terminal device according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of SIB1 indicating other SSBs and other SIBs 1 provided by an embodiment of the present application;

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

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

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present application;

FIG. 11 is a schematic diagram of an apparatus according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure.

Detailed Description

The embodiment of the application provides a transmission method and a communication device of a synchronous signal block, which are used for determining multiple types of SSBs (service side Bs), so that one or more types of terminal equipment can be accessed to different types of SSBs according to service needs or channel states, and a better network service is obtained or a better transmission capability is obtained.

Embodiments of the present application are described below with reference to the accompanying drawings.

The technical solution provided in the embodiment of the present application may be applied to various communication systems, for example, a Long Term Evolution (LTE) system, a 5G mobile communication system, a wireless fidelity (WiFi) system, a future sixth generation communication system, or a system in which multiple communication systems are integrated, and the embodiment of the present application is not limited. Among them, the 5G mobile communication system may also be referred to as a New Radio (NR) mobile communication system.

The technical scheme provided by the embodiment of the application can be applied to various communication scenes, for example, one or more of the following communication scenes: eMBB, URLLC, mtc, device-to-device (D2D) communication, vehicle-to-vehicle (V2X) communication, vehicle-to-vehicle (V2V) communication, and internet of things (IoT), among others.

The wireless communication system comprises communication devices, and the communication devices can perform wireless communication by using air interface resources. The communication device may include a network device and a terminal device, and the network device may also be referred to as a network side device. The air interface resources may include at least one of time domain resources, frequency domain resources, code resources, and spatial resources. In the embodiments of the present application, at least one (kind) may also be described as one (kind) or more (kinds), and a plurality (kind) may be two (kind), three (kind), four (kind) or more (kind), which is not limited in the embodiments of the present application. For example, a wireless communication system includes two communication devices, a first communication device and a second communication device, wherein the first communication device may be a network device and the second communication device may be a terminal device.

In the embodiments of the present application, "/" may indicate a relationship in which the objects associated before and after are an "or". For example, A/B may represent A or B. And in the formula calculation, "/" may represent a division symbol. For example, N/M represents N divided by M, and N and M each represent a numerical value. "and/or" may be used to describe that there are three relationships for an associated object. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. For convenience of describing the technical solutions of the embodiments of the present application, the words "first", "second", "a", "B", and the like may be used in the embodiments of the present application to distinguish technical features having the same or similar functions. The terms "first", "second", "a", "B", and the like do not necessarily limit the number and execution order, and the terms "first", "second", "a", "B", and the like do not necessarily differ. In the embodiments of the present application, the words "exemplary" or "such as" are used to indicate examples, illustrations, or illustrations, and embodiments or arrangements described as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or arrangements. The use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion for ease of understanding.

The terminal device related to the embodiments of the present application may also be referred to as a terminal, and may be a device having a wireless transceiving function. The terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or may be deployed on the surface of the water (e.g., a ship, etc.); or may be deployed in the air (e.g., an airplane, balloon, or satellite, etc.). The terminal device may be a User Equipment (UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device having wireless communication functionality. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. Or the terminal device may 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 smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), or the like. In this embodiment of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, for example, a chip system. The apparatus may be installed in the terminal device, or the apparatus may be used in cooperation with the terminal device. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the embodiment of the present application, a device for implementing a function of a terminal device is taken as an example of a terminal device, so as to specifically describe a technical solution provided in the embodiment of the present application.

In a communication system, such as an NR mobile communication system or other systems, a light (light) terminal device may be introduced with respect to a conventional terminal device, such as an eMBB terminal device. The lightweight terminal device may also be referred to as a reduced capability (REDCAP) terminal device. The eMBB terminal device may be a terminal device capable of transmitting an eMBB service. The REDCAP terminal device may be present in, but not limited to, an mtc scenario, which may include, but is not limited to, only the REDCAP terminal device. In contrast to the REDCAP terminal device, the legacy terminal device may be a high-capability terminal or a terminal device with unlimited capability. In the embodiment of the present application, the conventional terminal device may be replaced with a high-power terminal device that is introduced in the future and is opposite to the REDCAP terminal device. Illustratively, the feature comparison of the high-power terminal and the REDCAP terminal device satisfies at least one of the following first to ninth items.

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

The second term is: the number of antennas of the high-capacity terminal device is more than that of the REDCAP terminal device. The number of antennas may be the number of antennas set for the terminal device or the maximum number of antennas used for transmission and/or reception. For example, the high-capability terminal device supports 4 antennas at the maximum for receiving 2 antennas, and the REDCAP terminal device supports 2 antennas at the maximum for receiving 1 antenna. Alternatively, even if the number of antennas of the high-capability terminal device is equal to the number of antennas of the REDCAP terminal device, the capabilities are different in antenna selective transmission. For example, both high-and low-power terminal devices support 2-antenna transmission, but the high-power terminal devices support antenna-selective transmission, while the low-power terminal devices do not support antenna-selective transmission. Taking single antenna port data transmission as an example, the high-capacity terminal device can realize that the single antenna port data transmission is switched over 2 sending antennas, and the data transmission can obtain space diversity gain; and the single-antenna port data transmission of the low-power terminal equipment can be simultaneously transmitted on 2 transmitting antennas, which is equivalent to the transmission performance of 1 transmitting antenna.

The third item: the maximum transmit power supported by the high-power 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-power terminal device is 23 decibel-milliwatt (dBm) or 26dBm, and the maximum transmit power supported by the REDCAP terminal device is one of 4dBm to 20 dBm.

The fourth item: the high-power terminal device supports Carrier Aggregation (CA), and the REDCAP terminal device does not support carrier aggregation.

The fifth item: when the high-capacity terminal device and the REDCAP terminal device both support carrier aggregation, the maximum number of carriers supported by the high-capacity terminal device is greater than the maximum number of carriers supported by the REDCAP terminal device. For example, a high-capability terminal device supports aggregation of 32 carriers or 5 carriers at most, and a REDCAP terminal device supports aggregation of 2 carriers at most.

The sixth item: high-capability terminal devices and REDCAP terminal devices are introduced in different protocol versions. For example, in the NR protocol, the high-capability terminal device is a terminal device introduced in version (R) 15 of the protocol, and the REDCAP terminal device is a terminal device introduced in R17 of the protocol.

The seventh item: the duplex capabilities of the high-capability terminal device and the REDCAP terminal device are different. The duplex capability of the high-capability terminal equipment is stronger. For example, the high-capability terminal device supports full duplex Frequency Division Duplex (FDD), that is, the high-capability terminal device supports simultaneous reception and transmission when supporting FDD, and the REDCAP terminal device supports half duplex FDD, that is, the REDCAP terminal device does not support simultaneous reception and transmission when supporting FDD.

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

The ninth item: the peak rate of data transmission for the high-power terminal device is greater than the peak rate of data transmission for the REDCAP terminal device. The 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).

The network device related to the embodiment of the present application includes a Base Station (BS), which may be a device deployed in a radio access network and capable of performing wireless communication with a terminal device. The base station may have various forms, such as a macro base station, a micro base station, a relay station, or an access point. For example, the base station related to the embodiment of the present application may be a base station in a 5G mobile communication system or a base station in LTE, where the base station in the 5G mobile communication system may also be referred to as a Transmission Reception Point (TRP) or a gNB.

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

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

In the embodiment of the application, the terminal device can establish connection between the terminal device and the network device through an initial access process, so that data can be transmitted with the network device.

In one possible implementation, the main procedure of initial access of a terminal device (e.g., a legacy terminal device) includes:

step a, detecting a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) from a network device, so as to receive a Synchronization Signal Block (SSB) from the network device, wherein the SSB includes the PSS, the SSS, and a Physical Broadcast Channel (PBCH);

step b, acquiring a Master Information Block (MIB) from the PBCH; if the SSB is determined to be a cell-defined SSB (CD-SSB) from the MIB, determining a Common Search Space (CSS) and a control resource set (CORESET) #0 based on an indication of the MIB, if the SSB is determined to be a Non-cell defined synchronization signal block (Non-CD-SSB) from the MIB, searching for the CD-SSB based on an indication of the Non-CD-SSB, determining a CSS and a CORESET #0 based on an indication of the MIB from which the CD-SSB was searched;

step c, determining a candidate resource for transmitting a Physical Downlink Control Channel (PDCCH) according to the CORESET #0 and the CSS, wherein the PDCCH carries Downlink Control Information (DCI); detecting DCI in a candidate resource of the PDCCH; after detecting the DCI, receiving a Physical Downlink Shared Channel (PDSCH) according to scheduling information indicated by the DCI, where the PDSCH carries system information of a cell (for example, SIB1 and/or other SIBs), that is, acquiring the system information of the cell according to the DCI;

and d, initiating a random access process to the network equipment according to the system information, and establishing the connection between the terminal equipment and the network equipment.

In the embodiment of the present application, the whole process of determining an SSB as a CD-SSB, determining a CSS and a CORESET #0, determining a PDCCH according to the CORESET #0 and the CSS, detecting DCI in a candidate resource of the PDCCH, and acquiring system information according to the DCI in the initial access process is collectively referred to as "accessing a network through an SSB", or "accessing a network by using an SSB", or "accessing a network using an SSB", or "initially accessing a network through an SSB", and the subsequent content does not describe the process of accessing a network through an SSB.

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

In the initial access process, the network device may send the SSB by using a beamforming technique. In order to adapt to the traditional terminal equipment, the shaped beam may be wide, the coverage area is wide, but the coverage distance is limited. If the wide beam is used for the REDCAP terminal device, when the REDCAP terminal device with low coverage initiates random access, due to reciprocity of uplink and downlink channel environments, the base station may not detect an uplink signal sent by the RADCAP terminal device, or the detected signal is weak, so the wide beam SSB may not be used for random access of the REDCAP terminal device at the edge of a cell or in a scene with weak coverage. Due to different characteristics of different terminal devices (e.g., eMBB terminal device and REDCAP terminal device, or URLLC terminal device and REDCAP terminal device, or eMBB terminal device and URLLC terminal device), different terminal devices may need independent SSBs to meet their respective requirements. Further, different terminal devices may also need independent system information (e.g., different system information), a proprietary access network, and/or control channels of different capabilities, etc., for satisfying respective needs of the different terminal devices.

Based on the above analysis, the embodiment of the present application provides a transmission method for a synchronization signal block, which is applicable to a communication scenario between a network device and multiple types of terminal devices, and can provide independent SSBs for different types of terminal devices, thereby meeting communication requirements of various types of terminal devices. The independent SSB means that the network device broadcasts SSBs, which are required to be used by various terminal devices, for different types of terminal devices.

In the embodiment of the application, terminal devices of multiple capability types can be included according to different capabilities of the terminal devices. For example, two types of terminal devices of different types may be represented by type a terminal devices and type B terminal devices. For example, the type a terminal device may be a terminal device for an Industrial Wireless Sensor Network (IWSN), and the type B terminal device may be a terminal device for video surveillance (video surveillance).

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

In the embodiment of the present application, for convenience of description, two types, namely, a legacy terminal device and a REDCAP terminal device, may be taken as examples to describe corresponding technical solutions. For other various types of processing modes of the terminal device for the SSB, reference may be made to the processing modes of the conventional terminal device and the redtap terminal device for the SSB.

According to the embodiment of the application, on the basis that the network equipment can only broadcast one SSB, another newly added SSB can be broadcast. For example, the network device may transmit the newly added SSB using a narrower beam, so the SSB is covered further. Optionally, the terminal device does not perceive which width of beam the network device uses to transmit the SSB. For example, the newly added SSB may be dedicated to the REDCAP terminal device accessing the network, and the process of accessing the network through the SSB is described in detail in the foregoing. The REDCAP terminal device may receive the SSB and obtain system information. Optionally, the newly added SSB cannot be correctly interpreted by the conventional terminal device, so that the newly added SSB does not affect the conventional terminal device. The fact that the conventional terminal device cannot correctly interpret the SSB means that the conventional terminal device cannot search the SSB, or the conventional terminal device cannot interpret information carried by the SSB, or the conventional terminal device can acquire the information carried by the SSB, but cannot correctly analyze the meaning represented by the information.

Fig. 1 is a schematic view of an interaction flow between a network device and a terminal device according to an embodiment of the present application. In the interactive process, the method mainly comprises the following steps:

101. the network device broadcasts a first SSB.

Wherein 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, and 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 SSB.

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

In this embodiment of the present application, a network device may send multiple different types of SSBs, for example, the network device may send a first type of SSB and a second type of SSB, where the first type of SSB and the second type of SSB are different types of SSBs. Without limitation, the network device may also send more types of SSBs, for example, the network device may send a third type SSB and a fourth type SSB.

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

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

In this embodiment of the present application, when the network device generates the first SSB, the network device may determine the type of the first SSB. For example, when the network device determines that the first SSB is the first type SSB, the first SSB generated by the network device satisfies the first condition, and when the network device determines that the first SSB is the second type SSB, the first SSB generated by the network device satisfies the second condition. The first condition and the second condition are conditions set according to the type of the 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 different concepts, the first SSB is used to refer to a specific SSB or specific SSBs, and the first type SSB refers to a type of SSB that meets a certain characteristic. Similarly, the second SSB and the second type SSB are different concepts, the second SSB is used to refer to a specific SSB or specific SSBs, and the second type SSB refers to a type of SSB that meets certain characteristics.

In an embodiment of the present application, a network device broadcasts a first SSB. The first terminal device receives the first SSB, and then the first terminal device may synchronize with the network device using the first SSB and initiate initial access to the network device according to the first SSB. For the process of accessing the network through the SSB, see the above description. The first SSB may be an SSB that can be correctly interpreted by the first terminal device, and meanwhile, the first SSB may be an SSB that cannot be correctly interpreted by the second terminal device, so that according to the type of the SSB, the processing modes of the SSB by the terminal devices of different device types may be different.

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

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

103. The first terminal device determines that the first SSB is a first type SSB if the first SSB satisfies a first condition. Alternatively, the first and second electrodes may be,

104. if the first SSB satisfies the second condition, the first terminal device determines that the first SSB is a second type SSB.

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 condition that the first SSB satisfies, for example, if the first SSB satisfies the first condition, the step 103 is executed, for example, if the first SSB satisfies the second condition, the step 104 is executed.

In some embodiments of the present application, the first condition comprises: 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 non-identical synchronization signal sequences.

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

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 the first sequence, the first SSB satisfies the first condition, and the first SSB can be correctly interpreted by the first terminal device, and if the first PSS of the first SSB is the 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, the first SSS of the first SSB is the first sequence, the first SSB can be correctly interpreted by the first terminal device, the first SSS of the first SSB is the second sequence, and the first SSB cannot be correctly interpreted by the first terminal device. Therefore, in the embodiment of the present application, different types of SSBs can be distinguished by different synchronization signal sequences. For example, the first type SSB is an SSB that can be correctly interpreted by the first terminal device, and the first terminal device can access the network through the first SSB, and the process of accessing the network through the SSB is described in detail in the foregoing.

In some embodiments of the present application, the first condition comprises: a demodulation reference signal (DMRS) of a 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.

Specifically, the first condition and the second condition may be conditions set according to a difference in 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 a first reference signal, and the second condition includes: the demodulation reference signal of the broadcast channel of the first SSB is the second reference signal. Therefore, when the network device determines that the first SSB is the first type SSB, the network device may set the demodulation reference signal of the broadcast channel of the first SSB to be the first reference signal, and when the network device determines that the first SSB is the second type SSB, the network device may set the demodulation reference signal of the broadcast channel of the first SSB to be the second reference signal. The first terminal device may determine the type of the first SSB according to a specific condition that is satisfied by the demodulation reference signal of the broadcast channel of the first SSB.

In some embodiments of the present application, the first condition comprises: 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.

Specifically, the first condition and the second condition may be conditions set according to a difference in a scrambling sequence of the broadcast channel, for example, 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 the second scrambling sequence. Therefore, when the network device determines that the first SSB is the first type SSB, the network device may set the scrambling sequence of the broadcast channel of the first SSB to the first scrambling sequence, and when the network device determines that the first SSB is the 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 a specific condition that is satisfied by a scrambling sequence of a broadcast channel of the first SSB.

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

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

the network device broadcasts a second SSB, wherein the second SSB is either a first type SSB or a second type SSB.

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

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

if the first SSB is determined to be the first type SSB, the first terminal equipment determines 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, the first terminal equipment receives the second SSB from the network equipment;

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

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

Further, in some embodiments of the present application, the initiating, by the first terminal device, a random access to the network device according to the first SSB or the second SSB includes:

and the first terminal equipment determines the SSB for accessing the network equipment according to the measurement quantity of the first SSB and the measurement quantity of the second SSB.

When the first terminal device selects to use the first SSB or the second SSB for random access, the first terminal device may use the measurement quantity of different SSBs as a basis for selecting an SSB. For example, the first terminal device performs SSB selection based on the measurement amount of the first SSB and the measurement amount of the second SSB. The measurement quantity of the SSB may include a Reference Signal Receiving Power (RSRP) or a Reference Signal Receiving Quality (RSRQ) of the SSB. The first terminal device selects the SSB with the best or better channel quality according to the measurement quantity of the first SSB and the measurement quantity of the second SSB, after the network is accessed through the SSB, the first terminal device can acquire system information, and after random access resources are acquired according to the system information, a random access process can be performed, so that the network access efficiency of the first terminal device is improved.

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

step 11, the first terminal device sends a preamble sequence to the network device. The first terminal device calculates a radio network temporary identifier (RA-RNTI) according to the time-frequency resource for sending the preamble.

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

And step 13, the first terminal device receives the random access response, and 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 regards the random access response as the random access response for itself. And after receiving the random access response, the first terminal equipment sends the uplink message in the allocated uplink resource according to the indication of the first terminal equipment.

And step 14, the network equipment receives the uplink message of the first terminal equipment and returns a conflict resolution message to the first terminal equipment which is successfully accessed. The control information of the conflict resolution message is scrambled by a cell-radio network temporary identifier (C-RNTI), and the network device assigns a unique identifier to a first terminal device which is successfully accessed in the conflict resolution message, and other first terminal devices which are not successfully accessed will re-initiate random access.

For example, a two-step random access procedure, comprising:

step 21, the first terminal device sends a preamble and data to the network device, where the data may include an identifier of the first terminal device, and the first terminal device calculates an RA-RNTI according to the time-frequency resource for sending the preamble.

Step 22, the network device sends a random access response to the first terminal device. The network device calculates the same RA-RNTI as in step 21 and scrambles the control information of the random access response with the RA-RNTI. The random access response includes the unique identification of the first terminal device to specify the first terminal device with successful access, and other first terminal devices without successful access will reinitiate random access. The random access response further comprises a C-RNTI assigned to the first terminal device.

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

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

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

The first SSB may be configured to indicate a time-domain resource location of the second SSB, or the first SSB may also be configured to indicate a frequency-domain resource location of the second SSB, or the first SSB may also be configured to indicate configuration information of a synchronization signal sequence of the second SSB. Or, the first SSB may be further configured to indicate a time domain resource location of the second SSB and a frequency domain resource location of the second SSB, or the first SSB may be further configured to indicate a time domain resource location of the second SSB and configuration information of a synchronization signal sequence of the second SSB, or the first SSB may be further configured to indicate a frequency domain resource location of the second SSB and configuration information of a synchronization signal sequence of the second SSB, or the first SSB may be further configured to indicate a time frequency domain resource location of the second SSB and configuration information of a synchronization signal sequence of the second SSB.

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

Further, in some embodiments of the present application, the location of the time domain resource 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 location of the second SSB is indicated by at least one of a system frame number offset, a slot offset, and a symbol offset of the second SSB relative to the first SSB.

Wherein the first SSB may be used to indicate a time domain resource location of the second SSB. Specifically, the network device may adopt a direct indication mode (or a mode called as absolute indication), for example, the first SSB indicates at least one of a system frame number, a timeslot, and a symbol where the second SSB is located, or the system information corresponding to the first SSB indicates a system frame number of the second SSB, and the first terminal device may obtain the system frame number of the second SSB from the system information. In the same way, the first terminal device may also obtain the timeslot and the symbol of the second SSB from the system information. In this embodiment, the first terminal device may determine the time domain resource location of the second SSB through the system frame number, the timeslot, and the symbol where the second SSB is located.

Alternatively, the network device may use an indirect indication manner (or referred to as a relative indication manner), for example, the first SSB may indicate at least one of a system frame number offset, a timeslot offset, and a 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 a system frame number offset, a timeslot offset, and a symbol offset of the second SSB relative to the first SSB, and the first terminal device may determine the system frame number of the second SSB according to 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 the symbol of the second SSB. In this embodiment, the first terminal device may determine the time domain resource location of the second SSB through the time domain resource location of the first SSB, and the system frame number offset, the time slot offset, and the symbol offset of the second SSB with respect to the first SSB.

Specifically, the frequency domain resource location of the second SSB may be indicated by a Global Synchronization Channel Number (GSCN) number, which is absolute or relative, and the location relationship between the GSCN number and the SSB start frequency point is indicated in table 1 below. The frequency domain resource location may also be indicated by an absolute frequency bin or a relative offset, e.g., indicating the starting frequency difference of the second SSB and the first SSB, which frequency difference is in hertz (Hz).

The configuration information of the synchronization signal sequence of the second SSB may be represented by a sequence number (or index, identity) of the sequence pattern. For example, T1 candidate sequence patterns and T1 sequence numbers corresponding to the T1 candidate sequence patterns may be agreed in the protocol, 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 may indicate one sequence number from the T1 sequence numbers. From the one sequence number, a synchronization signal sequence pattern of the second SSB can be determined.

TABLE 1

Where denotes a multiplication operation.

In some embodiments of the present application, the first SSB is further configured to indicate a period to which the second SSB corresponds; or, the second SSB is further configured to indicate a period corresponding to the second SSB and a valid time corresponding to the period.

The first SSB may further indicate a period corresponding to the second SSB, and the network device may send the second SSB according to the period corresponding to the second SSB, and the first terminal device may determine the period corresponding to the second SSB through the first SSB, so that the first terminal device may receive the second SSB according to the period, and the purpose of periodically sending the second SSB is achieved.

In addition, the first SSB indicates a period corresponding to the second SSB and also indicates a valid time corresponding to the period, the network device may periodically send the second SSB within the valid time corresponding to the period, and the first terminal device may periodically receive the second SSB within the valid time corresponding to the period. After the validity time is exceeded, the network device does not periodically send the second SSB, or the periodicity at which the network device sends the second SSB changes. Similarly, after the valid time is exceeded, the first terminal device does not receive the second SSB periodically any more, or the first terminal device does not receive the second SSB according to the aforementioned indication information any more, so as to avoid 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.

and the network equipment indicates the information of the shared channel scheduled by the downlink control information corresponding to the second SSB by using the first SSB.

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

In the embodiment of the present application, the network device indicates, by using the first SSB, 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, according to the indication of the first SSB, the shared channel scheduled by the downlink control information corresponding to the second SSB, and does not need to obtain, by receiving the second SSB, the shared channel scheduled by the downlink control information corresponding to the second SSB, thereby reducing overhead of detecting, by the first terminal device, scheduling information of the shared channel.

In order to better understand and implement the above-described scheme of the embodiments of the present application, the following description specifically illustrates a corresponding application scenario. Implementation details described in this scenario may be used in conjunction with the above-described method embodiments.

In the embodiment of the application, a network device is taken as a base station, a first terminal device is a REDCAP terminal device, and a second terminal device is a traditional terminal device (Legacy terminal device) as an example, the base station newly adds an SSB dedicated to the REDCAP terminal device on the basis of a current SSB, the newly added SSB corresponds to a narrow beam, and the REDCAP terminal device can correctly interpret the newly added SSB, but the traditional terminal device cannot correctly interpret the newly added SSB. The base station may further add new indication information in the system information corresponding to the conventional SSB, so that the REDCAP terminal device receives the narrow beam with lower power consumption and acquires the system information carried by the narrow beam.

Two embodiments are described below.

Example one

The embodiment of the application provides the newly added SSB which can not be correctly read by the traditional terminal equipment, if the newly added SSB can enable the traditional terminal equipment to be accessed into the network according to the current rule, the time alignment disorder can be caused, and after the traditional terminal equipment receives the SSB, the time position of the SSB can be determined according to the rule defined by the traditional protocol, so that the clock alignment with the base station can be carried out. Therefore, in order not to change the processing mode of the conventional terminal device for the SSB, the solution of the embodiment of the present application should make the conventional terminal device unable to correctly interpret the newly added SSB.

Fig. 2 is a schematic diagram of an added SSB provided in this embodiment, where the SSBs-1 to SSB-4 are beams corresponding to SSB indexes (indexes) 1 to 4 defined by the current protocol, and the SSBs-1 to SSB-4 form an SSB set (burst), and all SSBs in the SSB set are sent within 5 milliseconds (ms). In the vacant time slot (slot) or symbol in the same SSB set period, the newly added SSB may be arranged, for example, SSB-1 ', SSB-1 ", SSB-2 ', and SSB-4 ' in fig. 2 are beams corresponding to the newly added SSB. The number of the SSB is merely an example, and the relationship between the SSB and the current SSB index may not be limited. For convenience of illustration, the two newly added beams near the conventional SSB-1 are named SSB-1 ', respectively, and the two beams near the conventional SSB-2, SSB-4 are named SSB-2 ', SSB-4 '.

Fig. 3 is a schematic diagram of an SIB1 corresponding to a newly added SSB provided in this embodiment, and as can be seen from the foregoing, there are multiple SSBs, for example, a first type SSB and a second type SSB, where the second type SSB is a conventional SSB, the first type SSB is a newly added SSB, each conventional 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, where information in the second type SIB1 may be received by a conventional terminal device or a REDCAP terminal device, information in the first type SIB1 may only be received by the REDCAP terminal device, and information in the first type SIB1 may not be received by the conventional terminal device.

In the embodiment of the present application, the second-type SSB is taken as a conventional SSB, and the first-type SSB is taken as an additional SSB for description, and the scenario does not limit the embodiment of the present application. For example, the first type SSB and the second type SSB in the embodiment of the present application may be two other types of SSBs, such as two other newly added types of SSBs. Moreover, the SSB type is new or existing, and is not limited to the embodiment of the present application. The method of the embodiments of the present application is primarily directed to two types of SSBs.

In a possible implementation, the process of searching the SSB by the REDCAP terminal device until acquiring the MIB information mainly includes the following steps:

the method comprises the following steps: the method comprises the steps that the terminal equipment determines a frequency point in frequency points where SSB possibly exists, the PSS is detected in a time domain symbol-by-symbol blind mode, and the SSS is detected in a blind mode after the PSS is detected. Under the condition of no prior information, the terminal equipment searches the time domain symbols one by one until the synchronous signals are searched. If the terminal device does not search for the synchronization signal on one frequency point for a long time (for example, more than 80ms), the terminal device switches to another frequency point where SSB may exist, and detects the synchronization signal in the same way. If the synchronization signal is detected, a Cell identity (Cell ID) is calculated according to Identities (IDs) represented by patterns of the PSS and the SSS.

Step two: the terminal device detects a PSS and a SSS, which satisfy the relationship shown in fig. 4 with a PBCH, and receives a load (payload) carried on the PBCH, where the load carried on the PBCH is scrambled by a sequence and the PBCH has a DMRS sequence. As shown in table 2, the time-frequency position of the DMRS on the PBCH is illustrated. The DMRS sequence r (m) is generated in the following manner:

c(n)＝(x₁(n+N_C)+x₂(n+N_C))mod 2，

N_C＝1600，

x₁(n+31)＝(x₁(n+3)+x₁(n))mod 2，

x₂(n+31)＝(x₂(n+3)+x₂(n+2)+x₂(n+1)+x₂(n))mod 2。

wherein c (n) initialization parameters are

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

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

TABLE 2

Step three: the terminal equipment carries out channel estimation according to the DMRS, decodes the PBCH according to the channel estimation result, and then descrambles the decoded PBCH according to the scrambling code of the PBCH, so that the load of the PBCH can be obtained, and further the information carried on the load can be obtained. The scrambling rule of PBCH may be

Wherein the content of the first and second substances,

for the scrambled bits, b (0), …, b (M)_bit-1) bits before scrambling, c (n) scrambling sequence, calculated by the following formula.

c(n)＝(x₁(n+N_C)+x₂(n+N_C))mod 2，

x₁(n+31)＝(x₁(n+3)+x₁(n))mod 2，

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

N_C＝1600，

Wherein, the value of v can be decimal and/or integer.

In this embodiment, the base station may broadcast the newly added SSB, so that the conventional terminal device cannot correctly interpret the newly added SSB, and the redcp terminal device may interpret the newly added SSB, wherein the detailed steps of the redcp terminal device interpreting the SSB refer to the first to fourth steps. There are various ways to implement the new SSB, for example, as follows:

a new SSB may be implemented by changing, by a base station, a synchronization sequence of a PSS and/or an SSS that is sent, and in this embodiment, a new synchronization sequence may be set for the new SSB, so that a conventional terminal device cannot use the new synchronization sequence to synchronize with the base station, and thus cannot receive the new SSB.

One implementation manner of the newly added SSB may be that the base station may set a new DMRS sequence of the PBCH for the newly added SSB, so that the conventional terminal device cannot identify the new DMRS sequence. For example, the initialization parameters of the DMRS sequences described above are changed. For example, the following one is added to the initialization parameter of c (n)

The value can be

Or other predefined numbers or

The number of correlations. The initialization parameters of c (n) may be:

by this method, the REDCAP terminal device can detect the DMRS sequence and determine it using the above defined method

And then determining the index of the newly added SSB. The conventional terminal device cannot correctly identify the new DMRS sequence, and therefore cannot correctly demodulate PBCH, and also cannot obtain MIB in SIB.

It is understood that c is the above in the embodiments of the present application_intIn the right side of the equation

By way of example, and not limitation,

other variables may also be substituted, e.g. by other than

And

other numerical values than those mentioned above, e.g. alternative to

As another example, a base stationA new scrambling sequence for PBCH may be set such that legacy terminal devices cannot descramble the PBCH payload. One possibility is to add a new scrambling sequence, e.g. from the above mentioned PBCH scrambling

Is modified into

X is a positive integer. Another possibility is to modify the scrambling rule, e.g. in the above method the scrambling rule is

The following new scrambling rule is adopted in the embodiment of the application:

namely can be at

The "+ 1" term is newly added in the right side of equation (c). Or both approaches are used together to set a new scrambling sequence.

In the above example, the REDCAP terminal device may use the new scrambling sequence to correctly descramble the PBCH payload and obtain the MIB carried by the PBCH, whereas the conventional terminal device cannot correctly descramble the PBCH and thus cannot obtain the MIB.

In the prior art, all terminal devices use the same set of rules to search for SSBs and obtain system information. If the rule is still used, both terminal devices can access the newly added SSB. The conventional terminal equipment is accessed to the newly added SSB, so that the clock alignment is disordered. Through the scheme of the first embodiment, the traditional terminal equipment cannot correctly interpret the newly added SSB. In the first embodiment, the traditional terminal device cannot correctly interpret the newly added SSB by using the new synchronization sequence, the new DMRS sequence, the new scrambling sequence, and the like, and the REDCAP terminal device can correctly interpret the newly added SSB according to the new synchronization sequence, the new DMRS sequence, the new scrambling sequence, and the like. The purpose that the traditional terminal equipment cannot be accessed from the newly added SSB, and the REDCAP terminal equipment can be accessed from the newly added SSB according to the new rule is achieved.

Example two

In the embodiment of the present application, because the beams used by the newly added SSBs and the time positions of the newly added SSBs can be implemented by the base station, there is uncertainty, for example, only a partial period of the SSBs may have one or more newly added SSBs, and the terminal device may not retrieve the optimal or better narrowband SSBs in the partial period. Therefore, when the redtap terminal device accesses the network from the existing SSB or some new SSB, the base station may broadcast the indication information, so that the redtap terminal device detects one or more new SSBs near the current SSB beam with lower energy consumption.

As shown in fig. 5, the procedure of accessing the network by the redcp terminal device provided in the embodiment of the present application, taking the second-type SSB as the conventional SSB and the first-type SSB as the new SSB as an example, includes:

step 1: the redcp terminal device searches the SSBs symbol by symbol, synchronizes with one SSB, and acquires system information through the SSB. Alternatively, the REDCAP terminal device may scan multiple SSBs in the SSB period, select an SSB with the largest received power or larger, read information of the SSB, such as an index (index) of the SSB, and/or read a SIB1 corresponding to the SSB. And if the SSB received or selected by the REDCAP terminal equipment is the traditional SSB, executing the step 2-1, otherwise, executing the step 2-2.

Step 2-1: the REDCAP terminal device reads SIB1 corresponding to the SSB, which includes system information sent to the REDCAP terminal device, and the system information may include other SSB information related to the SSB, such as other SSBs in the vicinity of an SSB beam. The system information may further include information of random access resources. The terminal device may determine whether another SSB needs to be detected according to the received power of the SSB searched in step 1, and the method for detecting the SSB of the terminal device is not limited in this embodiment of the application. And if the REDCAP terminal equipment judges that the random access is initiated from the traditional SSB, skipping to the step 6-2. And if the REDCAP terminal equipment judges that other SSBs need to be detected again, the step 3-1 is carried out.

Step 3-1: the REDCAP terminal device determines whether the vicinity of the conventional SSB corresponds to the newly added SSB according to the received SIB1 indication. And if the new SSB does not correspond to the new SSB, jumping to the step 6-2. Otherwise, step 4-1 is performed.

Step 4-1: the REDCAP terminal device receives the newly added SSB at the corresponding time-frequency position according to the indication of the SIB1, and detects a key indicator thereof, such as RSRP. Jump to step 5.

Step 2-2: when the SSB received or selected by the redtap terminal device is the new SSB, the new SIB1 corresponding to the new SSB is read, and the new SIB1 may include other conventional SSB information related to the new SSB, for example, other conventional SSBs near the beam of the new SSB. The REDCAP terminal device may determine whether it needs to detect another SSB or a conventional SSB according to the searched received power of the SSB, and if the REDCAP terminal device determines that the random access is initiated from the conventional SSB, it jumps to step 6-2. If it is determined that another SSB or a conventional SSB needs to be detected, step 3-2 is performed.

Step 3-2: the REDCAP terminal device receives other SSBs or conventional SSBs at corresponding time positions according to the indication of the new SIB1, and detects key indicators thereof, such as RSRP. Step 5 is then performed.

And 5: the REDCAP terminal device determines whether the receiving performance of the new SSB is better than the receiving performance of the conventional SSB. If yes, go to step 6-1. Otherwise, jump to step 6-2.

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

Step 6-2: the REDCAP terminal device initiates random access from the conventional SSB, the conventional SIB1 corresponds to the RO, and sends Msg1/MsgA using the RO.

It should be noted that in the above step 2-1 and step 2-2, the SIB1 of one conventional SSB or one new SSB may include information about other conventional SSBs and/or new SSBs related to the SSB, such as whether other SSBs exist near the SSB beam, and when other SSBs exist, determine the time-frequency location where the SSBs exist. In this embodiment, the other SSBs are SSBs relative to the currently received SSB, and the current SIB1 shown in fig. 6 indicates a schematic diagram of the other SSBs and other SIBs 1, where the first SSB schedules the current SIB1 and the second SSB schedules the other SIBs 1.

In one possible implementation, if the other SSBs are generally at the same frequency location as the current SSB, the time location of the other SSB may be indicated, and the frequency domain location of the other SSB may not be indicated. In fig. 6, the manner in which the RO indicates a random access opportunity (physical random access channel (PRACH)) in the SIB1 indicates a time position of one or more other SSBs may be any one of the following methods:

the method comprises the following steps: by absolute time position indication, optionally the period is indicated, or the period and the valid time are indicated. The time positions of other SSBs are indicated, for example, by the "system frame number + slot (slot) + symbol". Taking fig. 7 as an example, the current SSB and SIB1 are in frame-1, in SIB1, indicating the system frame number of frame-3, and the slot position and symbol position in frame-3. E.g., frame-3, system frame number 1020, the first symbol of the indicated SSB is located in the 3 rd symbol of the 4 th slot in the frame. Alternatively, as shown in fig. 8, cycle-1 and cycle-2 of the SSB are indicated, for example, cycle-1 is 4 slots, and cycle-2 is 1 frame, and the terminal device may determine the time positions of other SSBs according to the indicated time position of the first SSB and cycle-1 and cycle-2. Optionally, the validity time of the period is also indicated, for example, the validity time is 4 frames, and the indicated period is considered to be invalid after 4 frames.

The second method comprises the following steps: the period, or both, is optionally indicated by a relative time position (slot + symbol offset relative to the first SSB). The time positions of the other SSBs are indicated, for example, by the "number of frames out of phase + slot position + symbol position". Taking fig. 8 as an example, SIB1 indicates a phase difference of 2 frames, and the slot position of SSB in the frame is 4 and the symbol position in the slot is 3. Another possible implementation is that the "frame number + symbol position" of the phase difference or the number of symbols of the phase difference can be directly indicated by the position relationship between the frame and the slot and the symbol.

Alternatively, cycle-1 and cycle-2 may also be indicated, for example, cycle-1 is 4 slots, cycle-2 is 1 frame, and the terminal device may determine the time positions of other SSBs according to the indicated time position of the first SSB and cycle-1 and cycle-2. Optionally, the validity time of the period is also indicated, for example, the validity time is 4 frames, and the indicated period is considered to be invalid after 4 frames.

In the present SIB1, the embodiment of the present application may indicate information in DCI corresponding to other SSBs and indicate a timeslot in which the DCI is located. After detecting other SSBs, the terminal device may obtain the PDSCH scheduled by the DCI and demodulate the SIB1 carried thereon without blind DCI detection, as shown in fig. 6. The manner of indicating the slot in which the DCI is located is the same as the above-described "method one" or "method two". Table 3 shows fields included in Downlink Control Information (DCI) scrambled by a system information-radio network temporary identifier (SI-RNTI).

TABLE 3

In the second embodiment, after the REDCAP terminal device is synchronized with the current SSB, it is not necessary to search the synchronization signal and the common search space again to obtain other SSBs and their corresponding SIB1, which saves the energy consumption for searching SSBs and blind detecting DCI.

By setting the indication information, the REDCAP terminal device can measure more SSBs and has an opportunity to access the network from an SSB with a better beam, thereby increasing the coverage of the beam.

In the embodiment of the present application, the REDCAP terminal device indicates the time position of the second SSB and the PDSCH scheduling information of the SIB1 corresponding to the second SSB in the SIB1 corresponding to the current first SSB, so that the REDCAP terminal device can obtain the PDSCH of the SIB1 corresponding to the second SSB without searching 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.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of a network device, a terminal device, and interaction between the network device and the terminal device. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and configuration constraints imposed on the technical solution.

To facilitate better implementation of the above-described aspects of the embodiments of the present application, the following also provides relevant means for implementing the above-described aspects.

Referring to fig. 9, an apparatus according to an embodiment of the present application is provided. The device can be a terminal device, a device in the terminal device, or a device capable of being matched with the terminal device for use. Fig. 9 illustrates an example in which the apparatus is a terminal device 900. The terminal device 900 may include: a transceiver module 901 and a processing module 902.

In one possible implementation:

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

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, and the second condition includes: a demodulation reference signal of a 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 a possible implementation, the initialization parameter of the first reference signal is

The initialization parameter of the second reference signal is

Wherein the content of the first and second substances,

is the cell ID where the SSB is located. Adding one of the following items in the initialization parameter of the second reference signal

The value can be

Or other predefined numbers or

The initialization parameter of the first reference signal can be obtained by the correlation number.

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 non-identical scrambling sequences.

Wherein the content of the first and second substances,

is the cell ID of the SSB, X is a positive integer, by the above

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

In one possible implementation, the first scrambling rule is

The second scrambling rule is

Wherein b (i) represents a value of an i-th bit before scrambling,

In one possible implementation:

and the processing module is used for determining the SSB for accessing the network equipment according to the measurement quantity of the first SSB and the measurement quantity of the second SSB.

In one possible implementation:

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

In one possible implementation:

the time domain resource position of the second SSB is indicated by at least one of a system frame number, a time slot and a symbol where 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 with respect to the first SSB.

In one possible implementation:

the first SSB is further used for indicating a period corresponding to the second SSB; or, the apparatus is further configured to indicate a period corresponding to the second SSB and a valid time corresponding to the period.

In one possible implementation:

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

Referring to fig. 10, an apparatus according to an embodiment of the present application is provided. The device may be a network device, or a device in a network device, or a device capable of being used in cooperation with a network device. Fig. 10 illustrates an example in which the apparatus is a network device 1000. The network device 1000 may include: a transceiver module 1001 and a processing module 1002.

In one possible implementation:

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

In one possible implementation:

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

In one possible implementation:

and the processing module is used for determining the information of the shared channel scheduled by the downlink control information corresponding to the second SSB according to the first SSB.

For the description of the first SSB, the first type SSB, and the second type SSB, reference may be made to the foregoing method embodiments, and details are not repeated here.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Fig. 11 shows an apparatus 1100 provided in this embodiment of the present application, configured to implement the functions of the terminal device in the foregoing method. The device may be a terminal device, or a device in the terminal device, or a device capable of being used in cooperation with the terminal device. Wherein the apparatus may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

The apparatus 1100 includes at least one processor 1120, which is configured to implement the functions of the terminal device in the methods provided by the embodiments of the present application. For example, the processor 1120 may receive information such as downlink control information and analyze the information, which is specifically referred to the detailed description in the method example and is not described herein again.

The apparatus 1100 may also include at least one memory 1130 for storing program instructions and/or data. A memory 1130 is coupled to the processor 1120. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 1120 may operate in conjunction with the memory 1130. Processor 1120 may execute program instructions stored in memory 1130. At least one of the at least one memory may be included in the processor device 1100 may further include a communication interface, which may be implemented in various ways, for example, the communication interface may be a transceiver, an interface, a bus, a circuit, a pin, or a device capable of performing a transceiving function, the communication interface is illustrated in fig. 11 as the transceiver 1110, and the transceiver 1110 is used for communicating with other devices through a transmission medium, so that the device used in the device 1100 may communicate with other devices. Illustratively, the other device may be a network device. The processor 1120 transmits and receives data using the transceiver 1110 and is configured to implement the method performed by the terminal device in the embodiments corresponding to fig. 1 and 5.

The specific connection medium among the transceiver 1110, the processor 1120, and the memory 1130 is not limited in the embodiments of the present invention. In the embodiment of the present application, the memory 1130, the processor 1120 and the transceiver 1110 are connected by a bus 1140 in fig. 11, the bus is represented by a thick line in fig. 11, and the connection manner among other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 11, but this is not intended to represent only one bus or type of bus.

Fig. 12 shows an apparatus 1200 provided in this embodiment of the present application, for implementing the functions of the network device in the foregoing method. The device may be a network device, or a device in a network device, or a device capable of being used in cooperation with a network device. Wherein the apparatus may be a system-on-a-chip. The apparatus 1200 includes at least one processor 1220 for implementing the functions of the network device in the methods provided by the embodiments of the present application. For example, the processor 1220 may generate and send information such as downlink control information, which is specifically described in the detailed description of the method example and is not described herein again.

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

Processor 1220 may execute program instructions stored in memory 1230. At least one of the at least one memory may be included in the processor, the apparatus 1200 may further include a communication interface, which may be implemented in various ways, for example, the communication interface may be a transceiver, an interface, a bus, a circuit, or an apparatus capable of performing a transceiving function, the transceiver 1210 is illustrated in fig. 12 as the communication interface, and the transceiver 1210 is used for communicating with other devices through a transmission medium, so that the apparatus used in the apparatus 1200 may communicate with other devices. Illustratively, the other device may be a terminal device. The processor 1220 transmits and receives data using the transceiver 1210 and is configured to implement the method performed by the network device in the embodiments corresponding to fig. 1 and 5.

The specific connection medium among the transceiver 1210, the processor 1220 and the memory 1230 is not limited in the embodiments of the present application. In fig. 12, the memory 1230, the processor 1220 and the transceiver 1210 are connected by a bus 1240, the bus is represented by a thick line in fig. 12, and the connection manner among other components is only schematically illustrated and not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.

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 blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, 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 that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The technical solutions provided in the embodiments of the present application may be wholly or partially implemented by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal device or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). 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, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium, among others.

In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such 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 such modifications and variations as well.

Claims

1. A transmission method of a Synchronization Signal Block (SSB), comprising:

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

determining that the first SSB is the first type SSB if the first SSB satisfies a first condition; alternatively, the first and second electrodes may be,

determining that the first SSB is the second type SSB if the first SSB satisfies a second condition.

2. The method of claim 1, wherein the first condition comprises: 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.

3. The method of claim 1 or 2, wherein the first condition comprises: the demodulation reference signal of the broadcast channel of the first SSB is a first reference signal, and the second condition includes: a demodulation reference signal of a broadcast channel of the first SSB is a second reference signal;

4. The method of any of claims 1-3, wherein the first condition comprises: 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 non-identical scrambling sequences.

5. The method according to any of claims 1-4, wherein if it is determined that the first SSB is the first type SSB, the method further comprises:

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

receiving the second SSB from the network device when the second SSB is present;

and initiating random access to the network equipment according to the first SSB or the second SSB.

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

and determining the SSB for accessing the network equipment according to the measurement quantity of the first SSB and the measurement quantity of the second SSB.

7. The method of claim 5 or 6, further comprising:

when the second SSB is present, determining at least one of the following from the first SSB: the time domain resource location of the second SSB, the frequency domain resource location of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB.

8. The method of claim 7, wherein the location of the time domain resource 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,

9. The method according to any of claims 5-8, wherein the first SSB is further configured to indicate a period corresponding to the second SSB; or, the apparatus is further configured to indicate a period corresponding to the second SSB and a valid time corresponding to the period.

10. The method according to any one of claims 5 to 9, further comprising:

and when the second SSB exists, determining the information of the shared channel scheduled by the downlink control information corresponding to the second SSB according to the first SSB.

11. A transmission method of a Synchronization Signal Block (SSB), comprising:

broadcasting the first SSB;

12. The method of claim 11, wherein the first condition comprises: 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,

13. The method of claim 11 or 12, wherein the first condition comprises: the demodulation reference signal of the broadcast channel of the first SSB is a first reference signal, and the second condition includes: a demodulation reference signal of a broadcast channel of the first SSB is a second reference signal;

14. The method of any of claims 11 to 13, wherein the first condition comprises: 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;

15. The method according to any one of claims 11 to 14, further comprising:

broadcasting a second SSB, wherein the second SSB is the first type SSB or the second type SSB.

16. The method of claim 15, wherein the first SSB is configured to indicate at least one of: the time domain resource location of the second SSB, the frequency domain resource location of the second SSB, and the configuration information of the synchronization signal sequence of the second SSB.

17. The method of claim 16, wherein the location of the time domain resource 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,

18. The method of any of claims 15-17, wherein the first SSB is further configured to indicate a period corresponding to the second SSB; or, the apparatus is further configured to indicate a period corresponding to the second SSB and a valid time corresponding to the period.

19. The method according to any of claims 15 to 18, wherein the first SSB is further configured to indicate information of a shared channel scheduled by downlink control information corresponding to the second SSB.

20. A communication device arranged to implement the method of any of claims 1 to 19.

21. A communications apparatus, comprising a processor and a memory, the memory coupled to the processor, the processor configured to perform the method of any of claims 1-19.

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