A transmission method and communication device for synchronization signal blocks

Abstract

The embodiments of the present application provide a method for transmitting a synchronization signal block and a communication device. Among them, the method includes: receiving a first synchronization signal block (SSB) from a network device, where the first SSB is a first type of SSB of a first terminal device; if the first SSB is a second type of SSB of a second terminal device, determining a first control resource set and / or a first common search space according to the first SSB. In this method, the type recognition results of the first SSB by the second terminal device and the first terminal device may be different, and the usage methods of the first SSB by the second terminal device and the first terminal device may be different. For example, the second terminal device may determine a first control resource set and / or a first common search space according to the first SSB, thereby improving the utilization rate of the SSB.

Description

Technical Field

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

[0002] To cope with the future explosive growth of mobile data traffic, the massive connection of mobile communication devices, and / or the emerging new services and application scenarios, the fifth-generation (5G) mobile communication system has emerged as the times require. For example, three categories of application scenarios are defined in the 5G mobile communication system: the enhanced mobile broadband (eMBB) scenario, the ultra-reliable and low-latency communications (URLLC) scenario, and the massive machine type communications (mMTC) scenario.

[0003] Exemplarily, the eMBB scenario includes: ultra-high-definition video, augmented reality (AR), and / or virtual reality (VR), etc. The main characteristics of these services are large data transmission volume and high transmission rate. The URLLC scenario includes: wireless control in industrial manufacturing or production processes, motion control of driverless cars or drones, remote repair of driverless cars or drones, and / or tactile interaction applications such as remote surgery. The main characteristics of these services are the required ultra-high reliability and low latency. In addition, the characteristics of these services may also include less data transmission volume and / or burstiness. The mMTC scenario includes: smart grid distribution automation, communication of wearable devices, and / or smart cities, etc. The main characteristics of these services are a large number of connected devices and / or small data transmission volume. In addition, the terminal devices in the mMTC scenario may need to meet the requirements of low cost and / or relatively long standby time. Summary of the Invention

[0004] Embodiments of this application provide a method for transmitting a synchronization signal block and a communication device, which are used to improve the utilization rate of the SSB.

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

[0006] In a first aspect, an embodiment of the present application provides a method for transmitting a synchronization signal block, including: receiving a first synchronization signal block (SSB) from a network device, where the first SSB is a first type of SSB of a first terminal device; if the first SSB is a second type of SSB of a second terminal device, determining a first control resource set and / or a first common search space according to the first SSB.

[0007] For example, the first terminal device is a legacy terminal device, the first type of SSB is a Non-CD-SSB, the second terminal device is a REDCAP terminal device, and the second type of SSB is a CD-SSB. In the above solution, the first SSB can be different types of SSBs for the second terminal device and the first terminal device. For example, the first SSB is the first type of SSB of the first terminal device, and the first SSB is the second type of SSB of the second terminal device. Therefore, the type recognition results of the first SSB by the second terminal device and the first terminal device are different, and the usage methods of the first SSB by the second terminal device and the first terminal device can be different. For example, the second terminal device can determine a first control resource set and / or a first common search space according to the first SSB. Therefore, the second terminal device can use the first control resource set and / or the first common search space determined by the first SSB, thereby improving the utilization rate of the SSB. In addition, if the first SSB sent by the network device can be used by the second terminal device to determine a first control resource set and / or a first common search space, the network device does not need to send other SSBs to indicate the second terminal device to determine a first control resource set and / or a first common search space. Therefore, the network device can also reduce the overhead of sending more SSBs.

[0008] In a possible implementation manner, the method further includes: if the first SSB is the first type of SSB of the second terminal device, receiving a second SSB from the network device, and determining a second control resource set and / or a second common search space according to the second SSB. In the above solution, the second terminal device can receive the second SSB from the network device, determine a second control resource set and / or a second common search space according to the second SSB. After the second terminal device obtains the second control resource set and the second common search space, the second terminal device can use the second control resource set and the second common search space to determine candidate resources of the PDCCH, detect DCI in the candidate resources of the PDCCH, obtain system information according to the DCI, and access the network using the system information.

[0009] In a possible implementation manner, the first SSB includes first indication information, where when the first indication information is a first value, the first indication information is used to indicate that the first SSB is the second type of SSB of the second terminal device.

[0010] In a possible implementation, the first SSB includes first indication information. When the first indication information is a second value, the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device.

[0011] In the above solution, there are multiple implementation manners of the first indication information in the SSB. For example, the first indication information may be a newly added field in the SSB, or the first indication information may be a reserved field in the SSB, or the first indication information may be an original field in the SSB. By interpreting the information carried in the SSB, the second terminal device can obtain the first indication information, achieving the purpose of the network device indicating the SSB type of the SSB to the second terminal device.

[0012] In a possible implementation, the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB. In the above solution, the network device can use one or more fields in the SSB to carry the first indication information. For example, the network device can use at least one (or one or more) of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the SSB to carry the first indication information. For example, the network device can use the above one field in the SSB to carry the first indication information, or use the above multiple fields in the SSB to carry the first indication information. The specific field name and the specific number of fields used to carry the first indication information in the SSB are not limited. The second terminal device can obtain the first indication information by parsing at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the SSB. By this method, the first indication information can be carried without increasing signaling overhead.

[0013] In a possible implementation, the first SSB further includes second indication information, where the second indication information is used to indicate the offset information of the second SSB. In the above solution, the second terminal device obtains the offset information of the second SSB from the first SSB, so that the second terminal device can receive the second SSB sent by the network device according to the offset information. The second terminal device can determine the candidate resources of the common PDCCH through the second SSB, detect DCI in the candidate resources of the PDCCH, obtain the system information according to the DCI, and access the network using the system information. By this method, the second terminal device can quickly search for the second SSB, thereby saving the power consumption of the second terminal device.

[0014] In a possible implementation, the offset information of the second SSB includes: the first offset information of the global synchronization channel number (GSCN) of the second SSB relative to the GSCN of the first SSB; the second indication information includes a first bit and a second bit, where the second bit is used to indicate the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB; the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0015]

[0016] wherein, the is the GSCN of the second SSB, the represents the GSCN of the first SSB, the represents the first offset, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, the represents the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0017] In a possible implementation, the second indication information includes a first bit and a second bit, where,

[0018] the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0019]

[0020] wherein, is the GSCN of the second SSB, represents the GSCN of the first SSB, represents the first offset, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, represents the value indicated by the second bit. is a real number greater than or equal to 0.

[0021] In the above solution, the second terminal device can obtain the first bit and the second bit from the second indication information included in the first SSB, and the bit positions of the first bit and the second bit in the second indication information are not limited. Among them, the first bit indicates the value of a, and n can be an adjustment coefficient. For example, the value of n can be preset. For example, n is a coefficient predefined by the protocol. The second bit indicates the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB. Similar to the above equation, the second terminal device can obtain the GSCN of the second SSB.

[0022] In a possible implementation, the first terminal device is a legacy terminal device, the first type is Non-CD-SSB, the second terminal device is a REDCAP terminal device, and the second type is CD-SSB. The first SSB includes a B1 bit, and the B1 bit indicates whether the SSB is Non-CD-SSB for the REDCAP terminal device. For example, when B1 = 1, it means that the SSB is Non-CD-SSB for the REDCAP terminal device, and when B1 = 0, it means that the SSB is CD-SSB for the REDCAP terminal device. The first SSB also includes a B2 bit, and B2 can represent the following two meanings: If B1 = 1, that is, when the SSB is Non-CD-SSB for the REDCAP terminal device, B2 indicates an offset value of a new SSB frequency point relative to the legacy terminal device, which is used for the REDCAP terminal device to jump to the CD-SSB of the REDCAP terminal device. If B1 = 0, that is, when the SSB is CD-SSB for the REDCAP terminal device, B2 is used to indicate CORESET#0 and / or CSS, so that the REDCAP terminal device searches for downlink control information within the indicated time-frequency range, and after searching for the downlink control information, obtains system information according to the indication of the downlink control information.

[0023] In a possible implementation, the B2 bit is used to indicate the frequency information of the CD-SSB of the REDCAP terminal device. For example, the B2 bit represents an offset of a GSCN, and B2 can be the first bit and the second bit in the second indication information.

[0024] In a possible implementation, using the B2 bit to indicate CORESET#0 and / or CSS to the REDCAP terminal device can be any one of the following methods:

[0025] Method 1: CORESET#0 is a value predefined by the protocol, and the B2 bit is used to indicate CSS.

[0026] Method 2: CSS is a value predefined by the protocol, and the B2 bit is used to indicate CORESET#0.

[0027] Method 3: B2 = B21 + B22, where the B21 bit in the B2 bit indicates CORESET#0, the B22 bit indicates CSS, and B21 and B22 are integers greater than or equal to zero.

[0028] In a possible implementation, the offset information of the second SSB includes: the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB; the second indication information includes a first bit and a second bit, where the second bit is used to indicate the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB; the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0029]

[0030] wherein, the is the GSCN of the second SSB, the represents the GSCN of the first SSB, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, and the represents the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0031] In a possible implementation, the second indication information includes a first bit and a second bit, where,

[0032] the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0033]

[0034] wherein, is the GSCN of the second SSB, represents the GSCN of the first SSB, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, represents the value indicated by the second bit. n is a real number greater than or equal to 0.

[0035] In the above solution, the second terminal device can obtain the first bit and the second bit from the second indication information included in the first SSB, and the bit positions of the first bit and the second bit in the second indication information are not limited. Among them, the first bit indicates the value of a, and n can be an adjustment coefficient. For example, the value of n can be preset. For example, n is a coefficient predefined by the protocol. The second bit indicates the offset of the GSCN of the second SSB relative to the offset of the GSCN of the first SSB. Therefore, based on the above equation, the second terminal device can obtain the GSCN of the second SSB.

[0036] In a possible implementation, the offset information of the second SSB includes: the GSCN offset of the second SSB; the second indication information includes a first bit and a second bit, where the first bit is used to indicate that the GSCN offset of the second SSB is a positive offset or the GSCN offset of the second SSB is a negative offset; the second bit is used to indicate the GSCN offset of the second SSB; the frequency range of the second SSB is:

[0037] where the is the GSCN of the first SSB, the is the GSCN start value, b is the value indicated by the first bit, the value of b is 1 or -1, n is an adjustment coefficient, the is the GSCN end value, and the represents the GSCN offset of the second SSB.

[0038] In a possible implementation, the offset information of the second SSB includes: the GSCN offset of the second SSB; the second indication information includes a first bit and a second bit; the frequency range of the second SSB is:

[0039] where the is the GSCN of the first SSB, the is the GSCN start value, b is the value indicated by the first bit, the value of b is 1 or -1, n is an adjustment coefficient, the is the GSCN end value, and the is the value indicated by the second bit.

[0040] In the above solution, is the GSCN start value, It is the end value of GSCN. The start value and end value of GSCN can be the values indicated by the MIB. For example, the pdcch-ConfigSIB1 field in the MIB can be used to indicate the start value and end value of GSCN. The start value of GSCN can be indicated by the upper 4 bits of the pdcch-ConfigSIB1 field, and the end value of GSCN can be indicated by the lower 4 bits of the pdcch-ConfigSIB1 field. The second terminal device can obtain the first bit and the second bit from the second indication information included in the first SSB. The bit positions of the first bit and the second bit in the second indication information are not limited. Among them, the first bit indicates the value of b, and n can be an adjustment coefficient. For example, the value of n can be preset. For example, n is a coefficient predefined by the protocol. The second bit indicates the offset of the GSCN of the second SSB. The offset of the GSCN of the second SSB can be used to determine the frequency range of the second SSB.

[0041] In a possible implementation manner, the second indication information is carried by at least one of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB. In the above solution, the network device can use one or more fields in the SSB to carry the second indication information. For example, the network device can use at least one (or one or more) of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the SSB to carry the second indication information. For example, the network device can use the above one field in the SSB to carry the second indication information, or use the above multiple fields in the SSB to carry the second indication information. In the embodiments of the present application, the specific field names and the specific number of fields used to carry the second indication information in the SSB are not limited. The second terminal device can obtain the second indication information by parsing at least one of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the SSB. By this method, the second indication information can be carried without increasing the signaling overhead.

[0042] In a possible implementation, the first SSB includes third indication information, where the third indication information is used to indicate the first control resource set and / or the first common search space. In the above solution, after the second terminal device obtains the first control resource set and the first common search space, the second terminal device can use the first control resource set and the first common search space to determine the search space of the PDCCH, detect DCI in the candidate resources of the PDCCH, obtain system information according to the DCI, and use the system information to access the network.

[0043] In a possible implementation, the third indication information is carried by at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the spare field, and the reserved field corresponding to frequency range FR1 in the first SSB. In the above solution, the network device can use one or more fields in the SSB to carry the third indication information. For example, the network device can use at least one (or one or more) of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the spare field, and the reserved field corresponding to frequency range FR1 in the SSB to carry the third indication information. For example, the network device can use the above one field in the SSB to carry the third indication information, or use the above multiple fields in the SSB to carry the third indication information. In the embodiments of the present application, the specific field names and the specific number of fields used to carry the third indication information in the SSB are not limited. The second terminal device can obtain the third indication information by parsing at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the spare field, and the reserved field corresponding to frequency range FR1 in the SSB. By this method, the third indication information can be carried without increasing signaling overhead.

[0044] In a second aspect, an embodiment of the present application further provides a method for transmitting a synchronization signal block, including: receiving a first synchronization signal block SSB from a network device, where the first SSB is a first type of SSB of a first terminal device; if the first SSB is the first type of SSB of the second terminal device, receiving a second SSB from the network device, and determining a second control resource set and / or a second common search space according to the second SSB; where the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device; where the first indication information is carried by at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the spare field, and the reserved field corresponding to frequency range FR1 in the first SSB.

[0045] In the above solution, the network device may use one or more fields in the SSB to carry the first indication information. For example, the network device may use at least one (or one or more) of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the SSB to carry the first indication information. For example, the network device may use one of the above fields in the SSB to carry the first indication information, or use multiple of the above fields in the SSB to carry the first indication information. The specific field names and the specific number of fields used to carry the first indication information in the SSB are not limited. The second terminal device can obtain the first indication information by parsing at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the SSB. By this method, the first indication information can be carried without increasing the signaling overhead.

[0046] In a possible implementation, the first SSB further includes second indication information, where the second indication information is used to indicate the offset information of the second SSB.

[0047] In a possible implementation, the offset information of the second SSB includes: the first offset information of the global synchronization channel number GSCN of the second SSB relative to the GSCN of the first SSB; the second indication information includes a first bit and a second bit, where the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0048]

[0049] where, the is the GSCN of the second SSB, the represents the GSCN of the first SSB, the represents the first offset, the value of a indicated by the first bit is 1 or -1, n is an adjustment coefficient, and the is the value indicated by the second bit.

[0050] In a possible implementation, the offset information of the second SSB includes: the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB; the second indication information includes a first bit and a second bit, where the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0051]

[0052] where, the is the GSCN of the second SSB, the represents the GSCN of the first SSB, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, the is the value indicated by the second bit.

[0053] In a possible implementation, the offset information of the second SSB includes: the GSCN offset of the second SSB; the second indication information includes a first bit and a second bit, where,

[0054] The frequency range of the second SSB is:

[0055]

[0056] where, the is the GSCN of the first SSB, the is the GSCN start value, b is the value indicated by the first bit, the value of b is 1 or -1, n is an adjustment coefficient, the is the GSCN end value, the is the value indicated by the second bit.

[0057] In a possible implementation, the second indication information is carried by at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the first SSB.

[0058] In a third aspect, an embodiment of the present application further provides a method for transmitting a synchronization signal block, including: sending a first synchronization signal block SSB to a second terminal device, where the first SSB is the first type of SSB of the first terminal device; where, if the first SSB is the second type of SSB of the second terminal device, the first SSB is used to indicate a first control resource set and / or a first common search space to the second terminal device.

[0059] In a possible implementation, if the first SSB is the first type of SSB of the second terminal device, the method further includes: sending a second SSB to the second terminal device; where the second SSB is used to indicate a second control resource set and / or a second common search space to the second terminal device.

[0060] For the detailed introduction of the first SSB and the second SSB, refer to the first aspect, which will not be elaborated here.

[0061] Fourthly, an embodiment of the present application further provides a method for transmitting a synchronization signal block, including: sending a first synchronization signal block (SSB) to a second terminal device, where the first SSB is a first type of SSB of a first terminal device; if the first SSB is the first type of SSB of the second terminal device, sending a second SSB to the second terminal device; where the second SSB is used to indicate a second control resource set and / or a second common search space to the second terminal device; where the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device; where the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an intra-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0062] For a detailed introduction to the first SSB and the second SSB, refer to the second aspect, which will not be elaborated here.

[0063] Fifthly, an embodiment of the present application provides a device, which may be a second terminal device, or a device in the second terminal device, or a device that can be used in matching with the second terminal device. In one configuration, the device may include modules corresponding one by one to the methods / operations / steps / actions described in the first aspect or the second aspect, and the module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one configuration, the device may include a processing module and a transceiver module. Exemplarily,

[0064] In a possible implementation:

[0065] The transceiver module is configured to receive a first synchronization signal block (SSB) from a network device, where the first SSB is a first type of SSB of a first terminal device;

[0066] The processing module is configured to, if the first SSB is a second type of SSB of the second terminal device, determine a first control resource set and / or a first common search space according to the first SSB.

[0067] In a possible implementation:

[0068] The processing module is configured to receive a first synchronization signal block (SSB) from a network device through the transceiver module, where the first SSB is a first type of SSB of a first terminal device;

[0069] The processing module is configured to, if the first SSB is the first type of SSB of the second terminal device, receive a second SSB from the network device through the transceiver module and determine a second control resource set and / or a second common search space according to the second SSB;

[0070] Among them, the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is a first type of SSB of the second terminal device;

[0071] Among them, the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an intra-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0072] In a fifth aspect, the method executed by the processing module is as described in the foregoing first aspect or second aspect.

[0073] In a sixth aspect, an embodiment of the present application provides a device, which may be a network device, a device in a network device, or a device that can be used in matching with a network device. In one configuration, the device may include modules corresponding one by one to the methods / operations / steps / actions described in the third aspect or the fourth aspect, and the module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one configuration, the device may include a processing module and a transceiver module. Exemplarily,

[0074] In a possible implementation:

[0075] A processing module, configured to send a first synchronization signal block SSB to a second terminal device through a transceiver module, where the first SSB is a first type of SSB of a first terminal device;

[0076] Among them, if the first SSB is a second type of SSB of the second terminal device, the first SSB is used to indicate a first control resource set and / or a first common search space to the second terminal device.

[0077] In a possible implementation:

[0078] A processing module, configured to send a first synchronization signal block SSB to a second terminal device through a transceiver module, where the first SSB is a first type of SSB of a first terminal device;

[0079] The processing module, if the first SSB is the first type of SSB of the second terminal device, is configured to send a second SSB to the second terminal device through the transceiver module;

[0080] Among them, the second SSB is used to indicate a second control resource set and / or a second common search space to the second terminal device;

[0081] Wherein, the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is a first type of SSB of the second terminal device;

[0082] Wherein, the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0083] In a sixth aspect, the method executed by the processing module is as described in the foregoing third aspect or fourth aspect.

[0084] In a seventh aspect, an embodiment of the present application provides a device, the device includes a processor for implementing the method described in the foregoing first aspect or second aspect. Optionally, the device may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the foregoing first aspect or second aspect can be implemented. The device may further include a communication interface, and the communication interface is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces, and the other devices may be network devices. In a possible device, the device includes:

[0085] A memory for storing program instructions;

[0086] A processor for using the communication interface to execute the method described in the foregoing first aspect or second aspect, which will not be specifically limited herein.

[0087] In an eighth aspect, an embodiment of the present application provides a device, the device includes a processor for implementing the method described in the foregoing third aspect or fourth aspect. Optionally, the device may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the foregoing third aspect or fourth aspect can be implemented. The device may further include a communication interface, and the communication interface is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces, and the other devices may be a second terminal device or a first terminal device. In a possible device, the device includes:

[0088] A memory for storing program instructions;

[0089] A processor for using the communication interface to execute the method described in the foregoing third aspect or fourth aspect, which will not be specifically limited herein.

[0090] In a ninth aspect, an embodiment of the present application further provides a computer-readable storage medium, including instructions that, when running on a computer, cause the computer to execute the method described in any one of the first aspect to the fourth aspect.

[0091] In a tenth aspect, an embodiment of the present application further provides a computer program product, including instructions that, when running on a computer, cause the computer to execute the method described in any one of the first aspect to the fourth aspect.

[0092] In an eleventh aspect, an embodiment of the present application provides a chip system, which includes a processor and may further include a memory, and is used to implement the method described in any one of the first aspect to the fourth aspect. The chip system may be composed of chips or may include chips and other discrete devices.

[0093] In a twelfth aspect, an embodiment of the present application provides a system, where the system includes: the device described in the fifth aspect and the device described in the sixth aspect; or, the device described in the seventh aspect and the device described in the eighth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] Figure 1 It is a schematic diagram of the interaction process of a communication method provided by an embodiment of the present application;

[0095] Figure 2 It is a schematic diagram of the frame structure of a first SSB provided by an embodiment of the present application;

[0096] Figure 3 It is a schematic diagram of an application scenario of a method for transmitting a synchronization signal block executed by a REDCAP terminal device provided by an embodiment of the present application;

[0097] Figure 4 It is a schematic diagram for determining CORESET #0 provided by an embodiment of the present application;

[0098] Figure 5 It is a schematic diagram for determining CSS provided by an embodiment of the present application;

[0099] Figure 6 It is a schematic diagram of the structure of a terminal device provided by an embodiment of the present application;

[0100] Figure 7 It is a schematic diagram of the structure of a network device provided by an embodiment of the present application;

[0101] Figure 8 It is a schematic diagram of the structure of a device provided by an embodiment of the present application;

[0102] Figure 9 It is a schematic diagram of the structure of a device provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0103] Embodiments of the present application provide a method for transmitting synchronization signal blocks and a communication device, which are used to improve the utilization rate of SSBs.

[0104] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0105] The technical solutions provided by the embodiments of the present application can be applied to various communication systems. For example, long term evolution (LTE) systems, 5G mobile communication systems, wireless-fidelity (WiFi) systems, future sixth-generation and other communication systems, or systems integrating multiple communication systems, etc. The embodiments of the present application are not limited. Among them, 5G mobile communication can also be referred to as a new radio (NR) mobile communication system.

[0106] The technical solutions provided by the embodiments of the present application can be applied to various communication scenarios. For example, they can be applied to one or more of the following communication scenarios: eMBB, URLLC, mMTC, device-to-device (D2D) communication, vehicle to everything (V2X) communication, vehicle to vehicle (V2V) communication, and Internet of Things (IoT), etc.

[0107] A wireless communication system includes communication devices, and wireless communication can be carried out between communication devices by using air interface resources. Among them, the communication devices can include network devices and terminal devices, and the network devices can also be referred to as network-side devices. The air interface resources can include at least one of time domain resources, frequency domain resources, code resources, and space resources. In the embodiments of the present application, at least one (kind) can also be described as one (kind) or more than one (kind), and more than one (kind) can be two (kinds), three (kinds), four (kinds) or more (kinds). The embodiments of the present application are not limited. For example, a wireless communication system includes two communication devices, namely a first communication device and a second communication device. Among them, the first communication device can be a network device, and the second communication device can be a terminal device.

[0108] In the embodiments of the present application, " / " can indicate that the objects associated before and after are in an "or" relationship. For example, A / B can represent A or B. In terms of calculation methods, " / " can represent the division symbol, and N / M represents N divided by M, where N and M respectively represent a numerical value; "and / or" can be used to describe three relationships of associated objects. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B can be singular or plural. To facilitate the description of the technical solutions in the embodiments of the present application, in the embodiments of the present application, terms such as "first", "second", "A", "B", etc. can be used to distinguish technical features with the same or similar functions. These terms such as "first", "second", "A", "B", etc. do not limit the quantity and execution order, and these terms such as "first", "second", "A", "B", etc. do not necessarily limit being different. In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Embodiments or configuration solutions described as "exemplary" or "for example" should not be construed as being more preferred or having more advantages than other embodiments or configuration solutions. Using words such as "exemplary" or "for example" aims to present relevant concepts in a specific way for easy understanding.

[0109] The terminal device involved in the embodiments of the present application can also be referred to as a terminal, which can be a device with wireless transceiver functions. The terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or can be deployed on the water surface (such as a ship, etc.); or can be deployed in the air (such as an airplane, a balloon or a satellite, etc.). The terminal device can be a user equipment (UE), where the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with wireless communication functions. Exemplarily, the UE can be a mobile phone, a tablet computer or a computer with wireless transceiver functions. Or the terminal device can be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in a smart grid, a wireless terminal in a smart city, or a wireless terminal in a smart home, etc. In the embodiments of the present application, the device for implementing the functions of the terminal device can be the terminal device or a device capable of supporting the terminal device to implement the functions, such as a chip system. The device can be installed in the terminal device, or the device can be used in matching with the terminal device. In the embodiments of the present application, the chip system can be composed of chips or can include chips and other discrete devices. In the embodiments of the present application, taking the device for implementing the functions of the terminal device as the terminal device as an example, the technical solutions provided in the embodiments of the present application are specifically described.

[0110] The network device involved in the embodiments of the present application includes a base station (BS), which may be a device deployed in a radio access network capable of wireless communication with a terminal device. Among them, the base station may have various forms, such as a macro base station, a micro base station, a relay station, or an access point, etc. Exemplarily, the base station involved in the embodiments of the present application may be a base station in a 5G mobile communication system or a base station in LTE. Among them, the base station in a 5G mobile communication system may also be referred to as a transmission reception point (TRP) or a gNB. In the embodiments of the present application, the device for implementing the functions of the network device may be the network device or a device capable of supporting the network device to implement such functions, such as a chip system. This device may be installed in the network device, or this device may be used in matching with the network device. In the embodiments of the present application, taking the device for implementing the functions of the network device as the network device as an example, the technical solutions provided by the embodiments of the present application are specifically described.

[0111] The technical solutions provided by the embodiments of the present application can be applied to wireless communication between communication devices. The wireless communication between communication devices may include: wireless communication between a network device and a terminal device, wireless communication between network devices, or wireless communication between terminal devices. Among them, in the embodiments of the present application, the term "wireless communication" may also be abbreviated as "communication", and the term "communication" may also be described as "data transmission", "information transmission", "signal transmission", or "transmission". This technical solution can be used for wireless communication between a scheduling entity and a subordinate entity, where the scheduling entity can allocate radio resources to the subordinate entity. Those skilled in the art can use the technical solutions provided by the embodiments of the present application for other wireless communication between a scheduling entity and a subordinate entity, such as wireless communication between a macro base station and a micro base station, such as wireless communication between terminal device A and terminal device B. The embodiments of the present application are described by taking the communication between a network device and a terminal device as an example.

[0112] In a communication system, such as an NR mobile communication system or other systems, compared with traditional terminal devices, such as eMBB terminal devices, a lightweight terminal device can be introduced. This lightweight terminal device can also be referred to as a reduced capability (REDCAP) terminal device. Among them, an eMBB terminal device can be a terminal device capable of transmitting eMBB services. The REDCAP terminal device can exist in the mMTC scenario, but is not limited to the mMTC scenario. The mMTC scenario can include, but is not limited to, only including REDCAP terminal devices. Compared with the REDCAP terminal device, this traditional terminal device can be a high-capability terminal device or a terminal device with unrestricted capabilities. In the embodiments of this application, this traditional terminal device can be replaced by a high-capability terminal device introduced in the future relative to the REDCAP terminal device. Exemplarily, the comparison of the capabilities of the high-capability terminal device and the REDCAP terminal device satisfies one or more of the following first to ninth items.

[0113] The first item: The maximum bandwidth supported by the high-capability terminal device is greater than the maximum bandwidth supported by the REDCAP terminal device. For example, the maximum bandwidth supported by the high-capability terminal device can be 100 megahertz (MHz) or 200 MHz, and the maximum bandwidth supported by the REDCAP terminal device can be 20 MHz, 10 MHz, or 5 MHz.

[0114] The second item: The number of antennas of the high-capability terminal device is more than the number of antennas of the REDCAP terminal device. Among them, the number of antennas can be the actual number of antennas of the terminal device, or the maximum number of antennas that can be used for sending and / or receiving. For example, the high-capability terminal device supports a maximum of 4 antennas for receiving and 2 antennas for sending, and the REDCAP terminal device supports a maximum of 2 antennas for receiving and 1 antenna for sending. Or, even if the number of antennas of the high-capability terminal device is equal to the number of antennas of the REDCAP terminal device, their capabilities in antenna selective transmission are different. For example, both the high-capability terminal device and the REDCAP terminal device support 2-antenna transmission, but the high-capability terminal device supports antenna selective transmission, while the REDCAP terminal device does not support antenna selective transmission. Taking single-antenna port data transmission as an example, the high-capability terminal device can switch single-antenna port data transmission between 2 sending antennas, and this data transmission can obtain spatial diversity gain; while the single-antenna port data transmission of the REDCAP terminal device can only be sent simultaneously on 2 sending antennas, which is equivalent to the transmission performance of 1 sending antenna.

[0115] Item 3: The maximum transmit power supported by the high-capability terminal device is greater than the maximum transmit power supported by the REDCAP terminal device. For example, the maximum transmit power supported by the high-capability terminal device is 23 decibel-milliwatt (dBm) or 26 dBm, and the maximum transmit power supported by the REDCAP terminal device is a value between 4 dBm and 20 dBm.

[0116] Item 4: The high-capability terminal device supports carrier aggregation (CA), while the REDCAP terminal device does not support carrier aggregation.

[0117] Item 5: When both the high-capability terminal device and the REDCAP terminal device support carrier aggregation, the maximum number of carriers supported by the high-capability terminal device is greater than the maximum number of carriers supported by the REDCAP terminal device. For example, the high-capability terminal device supports the aggregation of up to 32 carriers or 5 carriers at most, and the REDCAP terminal device supports the aggregation of up to 2 carriers at most.

[0118] Item 6: The high-capability terminal device and the REDCAP terminal device are introduced in different protocol versions. For example, in the NR protocol, the high-capability terminal device is the terminal device introduced in protocol release (R) 15, and the REDCAP terminal device is the terminal device introduced in protocol R17.

[0119] Item 7: The duplex capabilities of the high-capability terminal device and the REDCAP terminal device are different. The duplex capability of the high-capability terminal device 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.

[0120] Item 8: The data processing capability of the high-capability terminal device is stronger than that of the REDCAP terminal device. The high-capability terminal device can process more data in the same time, or the high-capability terminal device takes less time to process the same data. For example, record the time when the terminal device receives downlink data from the network device as T1, the terminal device processes the downlink data, and record the time when the terminal device sends the feedback of the downlink data to the network device as T2. The time delay (i.e., the time difference) between T2 and T1 of the high-capability terminal device is less than the time delay between T2 and T1 of the REDCAP terminal device. Among them, the feedback of the downlink data can be an acknowledgement (ACK) feedback or a negative acknowledgement (NACK) feedback.

[0121] Item 9: The peak rate of data transmission of the high-capability terminal device is greater than the peak rate of data transmission of the REDCAP terminal device. Among them, data transmission includes uplink data transmission (that is, the terminal device can send data to the network device), and / or downlink data transmission (that is, the terminal device can receive data from the network device).

[0122] In the embodiments of the present application, for different capabilities of the terminal device, there may be multiple types of terminal devices with different capabilities. For example, the first type of terminal device and the second type of terminal device may represent two different types of terminal devices. For example, the first type of terminal device may be a terminal device for an industrial wireless sensor network (IWSN), and the second type of terminal device may be a terminal device for video surveillance. For example, the first type of terminal device may be a REDCAP terminal device, and the second type of terminal device may be a high-capability terminal device. For example, the first type of terminal device may be REDCAP terminal device A, and the second type of terminal device may be REDCAP terminal device B, where one or more of the following capabilities of REDCAP terminal device A and REDCAP terminal device B are different: bandwidth capability, number of antennas, transmit power, CA capability, duplex capability, and data processing capability. For example, the first type of terminal device may be a terminal device for an industrial wireless sensor network, and the second type of terminal device may be a terminal device for video surveillance and / or an eMBB terminal device.

[0123] In the embodiments of the present application, the terminal device can establish a connection between the terminal device and the network device through the initial access process, so that the terminal device can transmit data with the network device. In a possible implementation, the initial access process of the terminal device (such as a traditional terminal device) includes: detecting the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) from the network device, so as to receive the synchronization signal block (SSB) from the network device, where the SSB includes the PSS, the SSS, and the physical broadcast channel (PBCH); obtaining the master information block (MIB) from the PBCH; if it is determined according to the MIB that the SSB is a cell-defined-SSB (CD-SSB), then determining the common search space (CSS) and the control resource set (CORESET) #0 according to the indication of the MIB, if it is determined according to the MIB that the SSB is a non-cell-defined-SSB (Non-CD-SSB), then searching for the CD-SSB according to the indication of the Non-CD-SSB, and determining the CSS and the CORESET #0 according to the indication of the MIB of the searched CD-SSB; determining the candidate resources for transmitting the physical downlink control channel (PDCCH) according to the CORESET #0 and the CSS, where the PDCCH carries the downlink control information (DCI); detecting the DCI in the candidate resources of the PDCCH; after detecting the DCI, receiving the physical downlink shared channel (PDSCH) according to the scheduling information indicated by the DCI, where the PDSCH carries the system information of the cell, that is, obtaining the system information of the cell according to the indication of the DCI; initiating a random access process to the network device according to the system information to establish a connection between the terminal device and the network device.

[0124] In the embodiments of the present application, the entire process of using the MIB to determine the SSB as the CD-SSB, determining the CSS and CORESET #0, determining the candidate resources of the PDCCH according to CORESET #0 and CSS, detecting the DCI in the candidate resources of the PDCCH, and obtaining the system information according to the DCI in the initial access process is collectively referred to as "accessing the network through the SSB", "using the SSB to access the network", or "accessing the network according to the SSB", etc. The subsequent content will no longer elaborate on the process of "accessing the network through the SSB", "using the SSB to access the network", or "accessing the network according to the SSB". In the above process, when an SSB is a Non-CD-SSB for a terminal device (such as a traditional terminal device or a REDCAP terminal device), the terminal device cannot perform the random access process according to this SSB, or the terminal device cannot use or utilize this SSB to access the network. After searching for the CD-SSB again according to this SSB, the random access process can be performed.

[0125] When deploying the SSB, the network device can configure multiple SSBs on one carrier. For example, on a carrier with a bandwidth of 100 megahertz (MHz), 4 SSBs are configured. One of the 4 SSBs is the CD-SSB, located in frequency band 1, and the remaining 3 SSBs among the 4 SSBs are Non-CD-SSBs, located in frequency bands 2 to 4. Among them, frequency bands 1 to 4 can be located at different frequency positions of the 100 MHz carrier, and frequency bands 1 to 4 do not overlap. The network device can configure a bandwidth part (BWP) for the terminal device that enters the radio resource control (RRC) connected state. If the BWP configured for this terminal device includes frequency bands 2 to 4, then the terminal device can measure the Non-CD-SSBs on frequency bands 2 to 4, and determine power control parameters, judge whether to perform cell handover, etc. according to the measurement results. For a terminal device in the non-connected state (such as the idle state or the inactive state), when detecting a Non-CD-SSB during the initial access process, it can jump to frequency band 1 or other frequency bands configured with the CD-SSB according to the indication of this Non-CD-SSB. Therefore, the main function of the current Non-CD-SSB is to enable the terminal in the connected state to perform reference signal measurement, or enable the terminal in the non-connected state to jump to the CD-SSB.

[0126] Assume that there is a service requirement on the network side, and the REDCAP terminal device needs to use the frequency band where the traditional (Legacy) Non-CD-SSB is located as the operating frequency band, and this frequency band is not used for traditional terminal devices or high-capability terminal devices. For example, this frequency band is an industrial proprietary network. If this traditional Non-CD-SSB is also a Non-CD-SSB for the REDCAP terminal device, then this Non-CD-SSB cannot be used to indicate CORESET#0 and / or CSS to the REDCAP terminal device, that is, this Non-CD-SSB cannot be used for the REDCAP terminal device to obtain system information and initial access to the network. Therefore, the network device needs to broadcast more SSBs for the REDCAP terminal device to initially access the network, resulting in a problem of waste of broadcast SSB resources.

[0127] To solve the above technical problems, an embodiment of the present application proposes a method for transmitting a synchronization signal block, which is applicable to the communication scenario between a network device and various types of terminal devices. The REDCAP terminal device and the traditional terminal device need to access the network through different types of SSBs, and need to receive the system information they need according to different types of SSBs.

[0128] In an embodiment of the present application, for a terminal device (such as a traditional terminal device, an eMBB terminal device, or a URLLC terminal device, etc.), an SSB that is a Non-CD-SSB can be a CD-SSB of another terminal device (such as a REDCAP terminal device). Therefore, the other terminal device can use the SSB that the one terminal device cannot use for network access for random access, which can improve the utilization rate of the SSB. In addition, the SSB broadcast by the network device can be used by the other terminal device, so the network device can also reduce the broadcast of more SSBs, thereby saving the power consumption of the network device.

[0129] Please refer to Figure 1 As shown, it is a schematic diagram of an interaction process between a network device and a terminal device provided by an embodiment of the present application. In this interaction process, Figure 1 The interaction process shown mainly includes the following steps:

[0130] 101. The network device sends a first SSB to a second terminal device, where the first SSB is a first type of SSB of a first terminal device.

[0131] The network device can manage one or more (e.g., 2, 3, 6, etc.) cells, and the second terminal device can communicate with the network device in at least one of the cells (e.g., the first cell). Taking the at least one cell being the first cell as an example, the network device can broadcast the first SSB in the first cell, and the second terminal device can search for the first SSB in the first cell. For example, the second terminal device can obtain the SSB by detecting the PSS and SSS on the frequency points specified by the protocol or the frequency points where the SSB may exist.

[0132] The second terminal device and the first terminal device can be two different types of terminal devices. For ease of description, the embodiments of the present application are described below by taking the following situation as an example: the second terminal device is a REDCAP terminal device, and the first terminal device is a high-capability terminal device. For example, the first terminal device can be an eMBB terminal device.

[0133] Wherein, if the first SSB is the second type of SSB of the second terminal device, the first SSB is used to indicate the first control resource set and / or the first common search space to the second terminal device.

[0134] In the embodiments of the present application, the network device can configure the first SSB. The first SSB can be of different types or the same type for different types of terminal devices. For example, the first SSB is the first type of SSB of the first terminal device, and the first SSB is the second type of SSB of the second terminal device. Among them, the first type of SSB and the second type of SSB represent different types of SSBs. For example, the first type of SSB can be a Non-CD-SSB, that is, the first type of SSB does not indicate CORESET#0 and / or CSS. Therefore, the first terminal device cannot access the network from the frequency point corresponding to the first SSB, or the first terminal device cannot access the network using the first SSB. The second type of SSB can be a CD-SSB, that is, the second type of SSB indicates CORESET#0 and / or CSS. Therefore, the second terminal device can use the first SSB to access the network. For the process of accessing the network using the SSB, see the description of the foregoing content, and details are not described here again. Another example is that the first type of SSB is an SSB that the terminal device cannot use to determine CORESET#0 and / or CSS, and the second type of SSB is an SSB that the terminal device can use to determine CORESET#0 and / or CSS. In the embodiments of the present application, the implementation manners of the first type of SSB and the second type of SSB are not limited, and the implementation manners of the first type of SSB and the second type of SSB can be flexibly configured according to the application scenario.

[0135] It should be noted that in the embodiments of the present application, the same SSB may be of different SSB types for different types of terminal devices. The SSB types may include a first type of SSB and a second type of SSB. It is not limited that the embodiments of the present application may further include more types of SSBs, such as a third type of SSB and a fourth type of SSB, and so on.

[0136] 102. The second terminal device receives a first SSB from the network device, where the first SSB is the first type of SSB of the first terminal device.

[0137] In the embodiments of the present application, the second terminal device may receive the first SSB broadcast by the network device. The second terminal device may parse the first SSB to obtain the information carried by the first SSB. The second terminal device may determine the SSB type of the first SSB. For example, the second terminal device determines whether the first SSB is the first type of SSB of the first terminal device, and the second terminal device determines whether the first SSB is the second type of SSB of the second terminal device. Based on the foregoing description of the first type of SSB and the second type of SSB, it can be seen that the first SSB may be of different types for different types of terminal devices. For example, the first SSB is the first type of SSB of the first terminal device, and the first SSB is the second type of SSB of the second terminal device.

[0138] When the second terminal device determines that the first SSB is the first type of SSB of the first terminal device and the first SSB is the second type of SSB of the second terminal device, the second terminal device performs the subsequent step 103.

[0139] 103. If the first SSB is the second type of SSB of the second terminal device, the second terminal device determines a first control resource set and / or a first common search space according to the first SSB.

[0140] In an embodiment of the present application, when the first SSB is the first type of SSB of the first terminal device and the first SSB is the second type of SSB of the second terminal device, the second terminal device and the first terminal device may perform different processing methods on the first SSB. For example, if the first SSB is a Non-CD-SSB of the first terminal device, the first terminal device may use the first SSB to jump to a new CD-SSB or perform measurements using the SSB. If the first SSB is a Non-CD-SSB of the first terminal device and the first SSB is a CD-SSB of the second terminal device, the second terminal device may determine a first control resource set and / or a first common search space based on the first SSB. For example, the first control resource set may be the aforementioned CORESET#0, and the first common search space may be the aforementioned CSS. After the second terminal device determines CORESET#0 and CSS, it may determine candidate resources for the PDCCH based on CORESET#0 and CSS, detect DCI among the candidate resources for the PDCCH, obtain system information based on the DCI, and use the system information to access the network. Therefore, the embodiment of the present application can improve the utilization rate of the SSB.

[0141] It is not limited that, in an embodiment of the present application, the first control resource set and the first common search space may be used to determine the candidate resource location of the common PDCCH. Among them, the PDSCH scheduled by the common PDCCH may carry cell common information or the common information of a group of terminal devices. In the technical solution provided by the embodiment of the present application, the first control resource set and the first common search space may be replaced with parameters of other names, and the parameter is used to determine the candidate resource location of the common PDCCH.

[0142] In the embodiments of the present application, when the first SSB is the second type of SSB of the second terminal device, the second terminal device may determine at least one of the following according to the first SSB: the first control resource set and the first common search space. For example, if the first SSB indicates the information of the first control resource set, the second terminal device may use the first SSB to determine the first control resource set, and the second terminal device may determine the first common search space according to the pre-prescription of the protocol. Another example is that if the first SSB indicates the information of the first common search space, the second terminal device may use the first SSB to determine the first common search space, and the second terminal device may determine the first control resource set according to the pre-prescription of the protocol. Another example is that the first SSB indicates the information of the first control resource set and the information of the first common search space, and the second terminal device may use the first SSB to determine the first control resource set and the first common search space. In the embodiments of the present application, after the second terminal device obtains the first control resource set and the first common search space, the second terminal device may use the first control resource set and the first common search space to determine the candidate resources of the PDCCH, detect DCI in the candidate resources of the PDCCH, obtain the system information according to DCI, and access the network using the system information. In the embodiments of the present application, the first terminal device cannot access the network using the first SSB, but the second terminal device can access the network using the first SSB, which improves the utilization rate of the SSB broadcast by the network device by the second terminal device and reduces the overhead of the network device broadcasting more SSBs.

[0143] Illustrated as follows, the first type of SSB is Non-CD-SSB, and the second type of SSB is CD-SSB. The second terminal device uses the first SSB to synchronize with the network device and obtains the system information block (SIB) according to the first SSB. The second terminal device may initiate an initial access to the network device according to the information indicated by the SIB. For the detailed process of accessing the network through the SSB, please refer to the foregoing content description and will not be elaborated here.

[0144] In some embodiments of the present application, in addition to performing the foregoing step 101, the transmission method of the synchronization signal block performed by the network device may further include the following steps:

[0145] The network device sends a second SSB to the second terminal device.

[0146] Wherein, the first SSB is the first type of SSB of the second terminal device, and the second SSB is used to indicate the second control resource set and / or the second common search space to the second terminal device.

[0147] In some embodiments of the present application, a network device may broadcast a first SSB and a second SSB. Among them, the first SSB is a first type of SSB of a second terminal device, and the second SSB is a second type of SSB of the second terminal device. The first SSB is not used to indicate a control resource set and / or a common search space to the second terminal device, while the second SSB is used to indicate a control resource set and / or a common search space to the second terminal device. For example, the second SSB is used to indicate a second control resource set and / or a second common search space to the second terminal device, and the second terminal device may use the second SSB to determine the second control resource set and / or the second common search space. The second terminal device may use the second control resource set and the second common search space to determine candidate resources for the PDCCH, detect DCI among the candidate resources for the PDCCH, obtain system information according to the DCI, and use the system information to access the network.

[0148] It should be noted that in the embodiments of the present application, the second control resource set and the second common search space are used to determine the candidate resource locations for the common PDCCH. Among them, the PDSCH scheduled by the common PDCCH may carry cell common information or common information of a group of terminal devices. In the technical solution provided by the embodiments of the present application, the second control resource set and the second common search space may be replaced with parameters with other names, and the parameters are used to determine the candidate resource locations for the common PDCCH.

[0149] In the embodiments of the present application, the first control resource set and the second control resource set may be the same or different, and the embodiments of the present application do not make any restrictions. The first common search space and the second common search space may be the same or different, and the embodiments of the present application do not make any restrictions.

[0150] In some embodiments of the present application, in addition to performing the foregoing steps 102 and 103, the transmission method of the synchronization signal block performed by the second terminal device may further include the following steps:

[0151] If the first SSB is the first type of SSB of the second terminal device, the second terminal device receives the second SSB from the network device and determines the second control resource set and / or the second common search space according to the second SSB.

[0152] Among them, the second terminal device determines whether the first SSB is the first type of SSB of the second terminal device. The first SSB can be the same type of SSB for different types of terminal devices. For example, the first SSB is the first type of SSB of the first terminal device, and the first SSB is the first type of SSB of the second terminal device. When the first SSB is the first type of SSB of the first terminal device and the first SSB is the first type of SSB of the second terminal device, the second terminal device and the first terminal device can handle the first SSB in the same way. For example, if the first SSB is the Non-CD-SSB of the first terminal device and the first SSB is the Non-CD-SSB of the second terminal device, then the first terminal device cannot use the first SSB to access the network, and the first terminal device can jump to the CD-SSB of the first terminal device (such as the second SSB or the third SSB). The second terminal device also cannot use the first SSB to access the network, and the second terminal device can jump to the second SSB. Among them, the second SSB and the third SSB can represent different SSBs. At this time, the second terminal device can jump to the same SSB as the first terminal device, or the second terminal device can jump to a different SSB from the first terminal device. The second terminal device can receive the second SSB from the network device, determine the second control resource set and / or the second common search space according to the second SSB. After the second terminal device obtains the second control resource set and the second common search space, the second terminal device can use the second control resource set and the second common search space to determine the candidate resources of the PDCCH, detect the DCI in the candidate resources of the PDCCH, obtain the system information according to the DCI, and access the network using the system information.

[0153] In some embodiments of the present application, the SSB provided in the embodiments of the present application includes first indication information, where

[0154] When the first indication information is the first value, the first indication information is used to indicate that the SSB is the second type of SSB of the second terminal device;

[0155] When the first indication information is the second value, the first indication information is used to indicate that the SSB is the first type of SSB of the second terminal device. Among them, for example, the SSB is the first SSB or the second SSB. Figure 2 The structural schematic diagram of the first SSB is shown, and the structure of the second SSB can be similar to this, and will not be described one by one.

[0156] Specifically, there are multiple ways to implement the first indication information in the SSB. For example, the first indication information can be a newly added field in the SSB, or the first indication information can be a reserved field in the SSB, or the first indication information can be an original field in the SSB. By interpreting the information carried by the SSB, the second terminal device can obtain the first indication information, achieving the purpose of the network device indicating the SSB type of the SSB to the second terminal device. Taking the first SSB as an example, when the original field in the first SSB is an invalid field for the second terminal device, the original field in the first SSB can be used to carry the first indication information. Thus, in the embodiments of the present application, without changing the original structure of the first SSB, the second terminal device can obtain the first indication information by reinterpreting the original field of the first SSB, achieving the purpose of the network device indicating the SSB type of the first SSB to the second terminal device.

[0157] Specifically, there are multiple ways to obtain the value of the first indication information. The value of the first indication information can be the first value, or the second value. For another example, the value of the first indication information can also be the third value, or the fourth value, etc. Different values of the first indication information can indicate different types of SSBs for the second terminal device for the SSB carrying the first indication information. Specifically, taking the first SSB as an example, when the first indication information is the first value, the first indication information is used to indicate that the first SSB is the second type of SSB for the second terminal device. For example, the first value can be 0. When the first indication information is the second value, the first indication information is used to indicate that the first SSB is the first type of SSB for the second terminal device. For example, the second value can be 1. In the embodiments of the present application, the network device can indicate different types of SSBs by configuring different values of the first indication information, and the second terminal device can also determine different types of the SSB according to different values parsed from the first indication information. Thus, the second terminal device can perform corresponding operations according to the specific SSB type of the SSB corresponding to the second terminal device.

[0158] Optionally, in some embodiments of the present application, the first indication information is carried by at least one of the common sub-carrier spacing (subCarrierSpacingCommon) field, the demodulation reference signal type A position (dmrs-TypeA-Position) field, the intra-frequency reselection (intraFreqReselection) field, the spare field, and the reserved field corresponding to frequency range (FR) 1 in the SSB carrying the first indication information.

[0159] Exemplarily, in the embodiments of the present application, the common subcarrier spacing field is used to indicate the subcarrier spacing of CORESET #0, the demodulation reference signal type A position field is used to indicate the position of the demodulation reference signal in a time slot, the in-band reselection field is used to indicate whether to search for a cell on a new frequency when the cell is in a prohibited state, the idle field has no indication function, and the reserved field corresponding to FR1 is used to indicate that this field is in a reserved state when the spectrum is FR1 and has no indication function.

[0160] Specifically, the network device may use one or more fields in the SSB to carry the first indication information. For example, the network device may use at least one (or one or more) of the common subcarrier spacing field, the demodulation reference signal type A position field, the in-band reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the SSB to carry the first indication information. For example, the network device may use the above-mentioned one field in the SSB to carry the first indication information, or use the above-mentioned multiple fields in the SSB to carry the first indication information. In the embodiments of the present application, the specific field names and the specific number of fields used to carry the first indication information in the SSB are not limited. The second terminal device can obtain the first indication information by parsing at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the in-band reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the SSB.

[0161] In the embodiments of the present application, the frequency band where the SSB is located may belong to different frequency ranges. For example, the frequency band to which the SSB belongs may belong to FR1 or FR2. For example, the frequency range corresponding to FR1 is 450 MHz - 6000 MHz, and the frequency range corresponding to FR2 is 24250 MHz - 52600 MHz. The reserved field corresponding to FR1 refers to the field that is useless in the SSB when the frequency band where the SSB is located belongs to FR1, and thus can be used to carry the first indication information. When the frequency band where the SSB is located belongs to FR2, the above-mentioned useless field in FR1 is used to indicate the SSB index.

[0162] In some embodiments of the present application, when the first indication information is a first value, the first SSB includes third indication information, where the third indication information is used to indicate the first control resource set and / or the first common search space.

[0163] When the first indication information is the first value, the second terminal device may use the first SSB to determine at least one of the following: the first control resource set, the first common search space. For example, the first SSB includes third indication information, and the third indication information indicates the information of the first control resource set. The second terminal device may determine the first control resource set according to the indication of the third indication information, and the second terminal device may determine the first common search space according to the pre - specified protocol. Another example is that the third indication information indicates the information of the first common search space. The second terminal device may determine the first common search space according to the indication of the third indication information, and the second terminal device may determine the first control resource set according to the pre - specified protocol. Another example is that the third indication information indicates the information of the first control resource set and the information of the first common search space. The second terminal device may determine the first control resource set and the first common search space according to the indication of the third indication information. In the embodiments of the present application, the position of the third indication information in the first SSB is not limited. In the embodiments of the present application, after the second terminal device obtains the first control resource set and the first common search space, the second terminal device may use the first control resource set and the first common search space to determine the search space of the PDCCH, detect DCI in the candidate resources of the PDCCH, obtain system information according to DCI, and use the system information to access the network.

[0164] In some embodiments of the present application, the third indication information is carried by at least one of the common sub - carrier spacing field, demodulation reference signal type A position field, intra - frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB.

[0165] Specifically, the network device may use one or more fields in the first SSB to carry the third indication information. Without limitation, the network device may use at least one of the common sub - carrier spacing field, demodulation reference signal type A position field, intra - frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB to carry the third indication information. For example, the network device may use one of the above - mentioned fields in the first SSB to carry the third indication information, or use multiple of the above - mentioned fields in the first SSB to carry the third indication information. In the embodiments of the present application, the specific field names and the number of specific fields used to carry the third indication information in the first SSB are not limited. The second terminal device obtains the third indication information by parsing at least one of the common sub - carrier spacing field, demodulation reference signal type A position field, intra - frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB.

[0166] For example, the network device may use one of the above fields in the first SSB to carry the first indication information and the third indication information, or use multiple of the above fields in the first SSB to carry the first indication information and the third indication information. The positions of the first indication information and the third indication information in the first SSB are not limited. In addition, the specific fields used by the first SSB in the embodiments of the present application to carry the first indication information and the third indication information are not limited.

[0167] In some embodiments of the present application, if the network device broadcasts the first SSB, the second terminal device may receive the first SSB. For example, when the first indication information is carried in the first SSB and the first indication information includes a second value, the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device. For example, the first indication information is used to indicate that the first SSB is the Non-CD-SSB of the second terminal device. At this time, the network device also needs to broadcast the second SSB. The second SSB may be the second type of SSB of the second terminal device. For example, the second SSB may include the first indication information, and the value of the first indication information is the first value, which is used to indicate that the second SSB is the second type of SSB of the second terminal device, such as the CD-SSB. In this implementation scenario, as Figure 2 shown, the first SSB may further include second indication information, and the second indication information is used to indicate the offset information of the second SSB. The offset information of the second SSB is the offset information that the second terminal device needs to use when determining the second SSB. For example, the offset information of the second SSB may be the offset information of the second SSB relative to the first SSB. In the above embodiments of the present application, the second terminal device obtains the offset information of the second SSB from the first SSB, so that the second terminal device can receive the second SSB sent by the network device according to the offset information. The second terminal device can determine the candidate resources of the common PDCCH through the second SSB, detect DCI in the candidate resources of the PDCCH, obtain the system information according to the DCI, and access the network using the system information.

[0168] In some embodiments of the present application, the frequency position of the SSB may be represented by a global synchronization channel number (GSCN). For example, the frequency offset information of the second SSB includes: the first offset amount information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0169] In a possible implementation manner, the second indication information includes a first bit and a second bit, where

[0170] the second bit is used to indicate the first offset amount information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0171] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0172]

[0173] Wherein, is the GSCN of the second SSB, represents the GSCN of the first SSB, represents the first offset, a is the value indicated by the first bit, the value of a is 1 or -1, and n is an adjustment coefficient. represents the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB. n is a real number greater than or equal to 0. For example, n can be an integer greater than or equal to 1. is a real number greater than or equal to 0. For example, n can be an integer greater than or equal to 1.

[0174] In a possible implementation, the second indication information includes a first bit and a second bit. Wherein,

[0175] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0176]

[0177] Wherein, is the GSCN of the second SSB, represents the GSCN of the first SSB, represents the first offset, a is the value indicated by the first bit, the value of a is 1 or -1, and n is an adjustment coefficient. represents the value indicated by the second bit. n is a real number greater than or equal to 0. For example, n can be an integer greater than or equal to 1. is a real number greater than or equal to 0. For example, n can be an integer greater than or equal to 1.

[0178] Specifically, the second terminal device can obtain the first bit and the second bit from the second indication information included in the first SSB. The bit positions of the first bit and the second bit in the second indication information are not limited. Wherein, the first bit indicates the value of a, and n can be an adjustment coefficient. For example, the value of n can be preset. For example, n is a coefficient predefined by the protocol. The second bit indicates the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB. Similar to the above equation, the second terminal device can obtain the GSCN of the second SSB.

[0179] It is not limited that, based on the above calculation method satisfied by the GSCN of the second SSB and the GSCN of the first SSB, other similar calculation methods can also be adopted. For example, in Add other adjustment terms to the right side of the equation, or Multiply the entire right side of the equation by an adjustment term, which can be flexibly configured according to the application scenario and is not limited here.

[0180] It should be noted that represents the first offset, and this first offset is the offset obtained by looking up a table according to k SsB and pdcch-ConfigSIB1. For the description of k SSB and the specific way of looking up the table, please refer to the description of the subsequent embodiments.

[0181] Optionally, in the embodiments of the present application, the second indication information may include a third indication field and a fourth indication field. Among them, the third indication field is used to indicate that the first offset is a positive offset or a negative offset; the fourth indication field is used to indicate the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB. Among them, the third indication field and the fourth indication field may be explicit indications or implicit indications. The indication methods of the third indication field and the fourth indication field may include various forms, such as using bit positions or information streams. For example, when the third indication field is a bit position, it can be called the first bit position, and when the fourth indication field is a bit position, it can be called the second bit position.

[0182] In some embodiments of the present application, the frequency position of the SSB can be represented by GSCN. For example, the offset information of the second SSB includes: the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0183] In a possible implementation, the second indication information includes the first bit position and the second bit position, where

[0184] the second bit position is used to indicate the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0185] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0186]

[0187] Among them, is the GSCN of the second SSB, represents the GSCN of the first SSB, a is the value indicated by the first bit position, the value of a is 1 or -1, n is an adjustment coefficient, represents the offset of the GSCN of the second SSB relative to the GSCN of the first SSB. n is a real number greater than or equal to 0. For example, n can be an integer greater than or equal to 1.

[0188] In a possible implementation, the second indication information includes a first bit and a second bit, where

[0189] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0190]

[0191] where is the GSCN of the second SSB, represents the GSCN of the first SSB, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, represents the value indicated by the second bit. n is a real number greater than or equal to 0. For example, n can be an integer greater than or equal to 1.

[0192] Specifically, the second terminal device can obtain the first bit and the second bit from the second indication information included in the first SSB. The bit positions of the first bit and the second bit in the second indication information are not limited. Among them, the first bit indicates the value of a, and n can be an adjustment coefficient. For example, the value of n can be preset. For example, n is a coefficient predefined by the protocol. The second bit indicates the offset of the GSCN of the second SSB relative to the offset of the GSCN of the first SSB. Therefore, based on the above equation, the second terminal device can obtain the GSCN of the second SSB.

[0193] It is not limited that, based on the above calculation method satisfied by the GSCN of the second SSB and the GSCN of the first SSB, other similar calculation methods can also be adopted. For example, add other adjustment terms to the right side of the equation, or multiply the whole right side of the equation by an adjustment term. Specifically, it can be flexibly configured according to the application scenario and is not limited here.

[0194] It should be noted that, in the embodiments of the present application, the second indication information includes a third indication field and a fourth indication field. The third indication field is used to indicate that the first offset is a positive offset or the first offset is a negative offset; the fourth indication field is used to indicate the offset of the GSCN of the second SSB relative to the GSCN of the first SSB. Among them, the third indication field and the fourth indication field can be explicitly indicated or implicitly indicated. The indication methods of the third indication field and the fourth indication field can include various forms. For example, the bitwise or information flow method can be adopted. For example, when the third indication field is a bit, it can be called the first bit, and when the fourth indication field is a bit, it can be called the second bit.

[0195] In some embodiments of the present application, the frequency position of the SSB can be represented by the GSCN. For example, the offset information of the second SSB includes: the GSCN offset of the second SSB.

[0196] In a possible implementation, the second indication information includes a first bit and a second bit, where

[0197] the first bit is used to indicate that the GSCN offset of the second SSB is a positive offset or the GSCN offset of the second SSB is a negative offset;

[0198] the second bit is used to indicate the GSCN offset of the second SSB;

[0199] The frequency range of the second SSB is:

[0200]

[0201] where is the GSCN of the first SSB, is the GSCN start value, b is the value indicated by the first bit, the value of b is 1 or -1, n is an adjustment coefficient, is the GSCN end value, represents the GSCN offset of the second SSB. n is a real number greater than or equal to 0. For example, n can be an integer greater than or equal to 1.

[0202] Specifically, is the GSCN start value, is the GSCN end value. The GSCN start value and the GSCN end value can be the values indicated by the MIB. For example, the pdcch-ConfigSIB1 field in the MIB can be used to indicate the GSCN start value and the GSCN end value. The GSCN start value can be indicated by the high 4 bits of the pdcch-ConfigSIB1 field, and the GSCN end value can be indicated by the low 4 bits of the pdcch-ConfigSIB1 field. The second terminal device can obtain the first bit and the second bit from the second indication information included in the first SSB. The bit positions of the first bit and the second bit in the second indication information are not limited. Among them, the first bit indicates the value of b, and n can be an adjustment coefficient. For example, the value of n can be preset. For example, n is a coefficient predefined by the protocol. The second bit indicates the offset of the GSCN of the second SSB. The GSCN offset of the second SSB can be used to determine the frequency range of the second SSB.

[0203] It is not limited that, based on the above method for determining the frequency range of the second SSB, other similar methods can also be adopted. For example, on the left boundary of the above frequency range of the second SSB other adjustment items are added on this basis, or on the right boundary of the frequency range of the second SSB other adjustment items are added on this basis, which can be flexibly configured according to the application scenario and are not limited here.

[0204] It should be noted that, in the embodiment of the present application, the second indication information includes a third indication field and a fourth indication field. The third indication field is used to indicate that the GSCN offset of the second SSB is a positive offset or the GSCN offset of the second SSB is a negative offset; the fourth indication field is used to indicate the GSCN offset of the second SSB. Among them, the third indication field and the fourth indication field can be explicit indications or implicit indications. The indication methods of the third indication field and the fourth indication field can include various forms, such as using bit positions or information streams. For example, when the third indication field is a bit position, it can be called the first bit position, and when the fourth indication field is a bit position, it can be called the second bit position.

[0205] Optionally, the second indication information is carried by at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the SSB carrying the second indication information.

[0206] Specifically, the network device can use one or more fields in the SSB to carry the second indication information. For example, the network device can use at least one (or one or more) of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the SSB to carry the second indication information. For example, the network device can use the above one field in the SSB to carry the second indication information, or use the above multiple fields in the first SSB to carry the second indication information. The specific field names and the specific number of fields used to carry the second indication information in the first SSB in the embodiment of the present application are not limited. The second terminal device can obtain the second indication information by parsing at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to the frequency range FR1 in the first SSB.

[0207] The embodiment of the present application also provides a method for transmitting a synchronization signal block, which mainly includes the following processes:

[0208] The network device sends a first synchronization signal block SSB to the second terminal device, where the first SSB is the first type of SSB of the first terminal device.

[0209] If the first SSB is the first type of SSB of the second terminal device, the network device sends the second SSB to the second terminal device;

[0210] wherein, the second SSB is used to indicate the second control resource set and / or the second common search space to the second terminal device;

[0211] wherein, the first SSB includes first indication information, and the second value of the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device;

[0212] wherein, the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0213] The embodiment of the present application further provides a method for transmitting a synchronization signal block, which mainly includes the following processes:

[0214] The second terminal device receives the first synchronization signal block SSB from the network device, wherein the first SSB is the first type of SSB of the first terminal device;

[0215] If the first SSB is the first type of SSB of the second terminal device, the second terminal device receives the second SSB from the network device and determines the second control resource set and / or the second common search space according to the second SSB;

[0216] wherein, the first SSB includes first indication information, and the second value of the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device;

[0217] wherein, the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0218] In the above solution, the network device may use one or more fields in the SSB to carry the first indication information. For example, the network device may use at least one (or one or more) of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to frequency range FR1 in the SSB to carry the first indication information. For example, the network device may use one of the above fields in the SSB to carry the first indication information, or use multiple of the above fields in the SSB to carry the first indication information. The specific field names and the specific number of fields used to carry the first indication information in the SSB are not limited. The second terminal device can obtain the first indication information by parsing at least one of the common subcarrier spacing field, the demodulation reference signal type A position field, the intra-frequency reselection field, the idle field, and the reserved field corresponding to frequency range FR1 in the SSB. Through this method, the first indication information can be carried without increasing the signaling overhead.

[0219] For details of the first indication information and each field in the first SSB, refer to the descriptions in the foregoing embodiments and will not be elaborated herein.

[0220] To facilitate a better understanding and implementation of the above solution of the embodiments of the present application, the following corresponding application scenarios are given for specific illustration.

[0221] In this embodiment, taking the network device as a base station, the second terminal device as a REDCAP terminal device (hereinafter simply referred to as REDCAP UE), and the first terminal device as a legacy terminal device as an example, the first type of SSB may specifically be a Non-CD-SSB, and the second type of SSB may specifically be a CD-SSB. The legacy terminal device cannot obtain SIB1 through the Non-CD-SSB and cannot access the network from this cell. For the REDCAP terminal device, in some scenarios, it can access the network through the Non-CD-SSB corresponding to the legacy terminal device. For example, the network is a private network or an industrial network, etc. The embodiments of the present application support the REDCAP terminal device to determine CORESET#0 and CSS through the Non-CD-SSB of the legacy terminal device, determine the candidate resources of the PDCCH according to CORESET#0 and CSS, detect DCI among the candidate resources of the PDCCH, obtain the system information of the REDCAP terminal device according to DCI, and access the network using this system information.

[0222] Such as Figure 3As shown in the figure, an embodiment of the present application provides a transmission scenario of a synchronization signal block. An SSB is a Non-CD-SSB for traditional terminal devices. The REDCAP terminal device can determine the SSB type of the SSB for the REDCAP terminal device and perform different steps according to the determination result of the REDCAP terminal device. Specifically, when the REDCAP terminal device determines that an SSB is a Non-CD-SSB of a traditional terminal device, the process executed by the REDCAP terminal device includes the following steps:

[0223] Step S1: The REDCAP terminal device determines whether the received SSB is a Non-CD-SSB of a traditional terminal device. If the SSB is a Non-CD-SSB of a traditional terminal device, the REDCAP terminal device executes Step S2.

[0224] Optionally, this scenario may further include that the traditional terminal device determines whether the received SSB is a Non-CD-SSB. If the traditional terminal device determines that the received SSB is a Non-CD-SSB, the traditional terminal device jumps to the CD-SSB according to the indication information in the PBCH.

[0225] Step S2: The REDCAP terminal device determines whether the received SSB is a Non-CD-SSB for the REDCAP terminal device. If the REDCAP terminal device determines that the received SSB is a Non-CD-SSB, it jumps to Step S3-1 or Step S3-2. If the REDCAP terminal device determines that the received SSB is a CD-SSB, it jumps to Step S4.

[0226] Step S3-1: The REDCAP terminal device jumps to the same CD-SSB as the traditional terminal device and accesses the network through this CD-SSB. For the specific process of accessing the network through the SSB, please refer to the foregoing content introduction.

[0227] Step S3-2: The network device indicates the CD-SSB of the REDCAP terminal device, and the REDCAP terminal device jumps to this CD-SSB and accesses the network through this CD-SSB. For the specific process of accessing the network through the SSB, please refer to the foregoing content introduction.

[0228] Step S4: The network device indicates the CORESET#0 and / or CSS of the REDCAP terminal device, and the REDCAP terminal device obtains SIB1 according to the indication to complete the initial access process.

[0229] Next, the method for the terminal device to determine whether the received SSB is a Non-CD-SSB of a traditional terminal device in the above steps will be described.

[0230] In the embodiments of the present application, the PBCH payload includes These A bits are used to carry the MIB information. The meanings and number of bits of each field included in the MIB are shown in Table 1.

[0231] Table 1

[0232]

[0233] In the embodiments of the present application, after receiving the MIB, the terminal device determines whether the CSS of the traditional terminal device exists according to k SSB k is calculated through the ssb-SubcarrierOffset field. For the frequency band where the SSB is located, it can belong to FR1 or FR2. For FR1 and FR2, k SSB can adopt the following different calculation formulas: SSB When the frequency band where the SSB is located belongs to FR1,

[0234] There are a total of 5 bits, and the value range is from 0 to 31; It is obtained through the payload of the PBCH. The meaning of "|" is bit connection, that is, kssb consists of 5 bits, and the highest bit is The last four bits are ssb-SubcarrierOffset.

[0235] When the frequency band where the SSB is located belongs to FR2, k SSB = ssb-SubcarrierOffset, with a total of 4 bits, and the value range is from 0 to 15.

[0236] In the embodiments of the present application, the method by which the terminal device determines whether it is a CD-SSB according to k SSB and obtains the frequency point position of the CD-SSB according to the pdcch-ConfigSIB1 field in the MIB after determining it as a Non-CD-SSB is shown in Table 2, Table 3a, and Table 3b. Among them, Table 3a is used for calculation when the frequency band where the SSB is located can belong to FR1 Table 3b is used when the frequency band where the SSB is located can belong to FR2

[0237] Table 2

[0238]

[0239] Table 3a

[0240]

[0241] Table 3b

[0242] ​

[0243] Among them, controlResourceSetZero represents CORESET #0, and searchSpaceZero represents search space 0. In the embodiments of the present application, it may also represent the common search space CSS.

[0244] It should be noted that in Table 1 above, if the terminal device receives Non-CD-SSB, for the terminal device, the common subcarrier spacing (subCarrierSpacingCommon) field, the demodulation reference signal type A position (dmrs-TypeA-Position) field, the intra-frequency reselection (intraFreqReselection) field, the spare field, and the reserved field corresponding to frequency range (FR) 1 do not need to be interpreted, or there will be no corresponding subsequent actions even if they are interpreted. In the embodiments of the present application, subCarrierSpacingCommon, dmrs-TypeA-Position, intraFreqReselection, and spare can be used to carry at least one of the following indication information in the foregoing embodiments: the first indication information, the second indication information, and the third indication information.

[0245] The payload of the PBCH includes A bits, which are respectively These A bits are used to carry the MIB, in addition to the above In the PBCH, A total of 8 bits are used to indicate the following information:

[0246] It is the lower 4 bits of the system frame number. The system frame number (systemFrameNumber) field in the MIB occupies 6 bits, and these 10 bits are used to indicate the system frame number.

[0247] As a half-frame indication Indicates whether the SSB is in the first half-frame or the second half-frame of a frame.

[0248] Three bits, according to the different frequency bands and subcarrier spacings of the SSB, are used according to the following rules:

[0249] On the authorized spectrum of the FR1 frequency band, when the subcarrier spacing of the SSB is 15 kHz, the maximum number of SSBs in the SSB is 4, and when the subcarrier spacing of the SSB is 30 kHz, the maximum number of SSBs in the SSB is 8. Is the highest bit of k SSB Of Reserved. On the licensed spectrum in the FR2 band, the maximum number of SSBs in an SSB is 64. is the highest three bits indicating the SSB index information.

[0250] According to the above content, in, according to the different bands where the SSB is located, there will be a reserved field of 0 to 2 bits. For example, when the band where the SSB is located is the FR1 band, there is a reserved field, including the above In the embodiments of the present application, at least one of the common subcarrier spacing (subCarrierSpacingCommon) field, the demodulation reference signal type A position (dmrs-TypeA-Position) field, the intra-frequency reselection (intraFreqReselection) field, the spare field, and the reserved field corresponding to frequency range (FR) 1 can be used to carry at least one of the first indication information, the second indication information, and the third indication information.

[0251] Specifically, the SSB includes PBCH, and the REDCAP terminal device obtains the MIB from the PBCH, and determines whether the SSB is a Non-CD-SSB of a traditional terminal device through the indication of the MIB. The spare bits in the PBCH or MIB can be used, and / or the reinterpretation of some fields in the PBCH or MIB can be used to implement this indication.

[0252] To ensure that the traditional terminal device maintains the functions and behaviors defined in the current protocol unchanged, the content of some fields in the PBCH or MIB is not changed. As shown in Table 4 below, it is the information indicated by the MIB for traditional terminal devices and REDCAP terminal devices. In the Non-CD-SSB of the traditional terminal device, the common subcarrier spacing (subCarrierSpacingCommon) field, the demodulation reference signal type A position (dmrs-TypeA-Position) field, the intra-frequency reselection (intraFreqReselection) field, the spare field, and the reserved field corresponding to frequency range (FR) 1 in the MIB can be used for the indication information sent by the network device to the REDCAP terminal device in the above steps.

[0253] Table 4

[0254]

[0255]

[0256] It should be noted that "useless" in Table 4 above means that the field in the protocol is useless, and "no indication meaning" means that the field has no indication meaning in certain scenarios. For example, when the MIB indicates that the SSB is a Non-CD-SSB, the subCarrierSpacingCommon in the MIB is meaningless because this field is used to indicate the subcarrier spacing of the channel where the SIB of traditional terminal devices is located, and there is no corresponding SIB for this SSB.

[0257] For the descriptions of the first indication information, the second indication information, and the third indication information, please refer to the foregoing embodiments, and details are not described herein again.

[0258] As shown in Table 4, if the frequency band where the SSB is located belongs to FR1, the common subcarrier spacing (subCarrierSpacingCommon) field, the demodulation reference signal type A position (dmrs-TypeA-Position) field, the intra-frequency reselection (intraFreqReselection) field, the spare field, and the reserved field corresponding to frequency range (frequency range, FR) 1 in Table 4 above together occupy 6 bits. If the frequency band where the SSB is located belongs to FR2, the common subcarrier spacing (subCarrierSpacingCommon) field, the demodulation reference signal type A position (dmrs-TypeA-Position) field, the intra-frequency reselection (intraFreqReselection) field, the spare field, and the reserved field corresponding to frequency range (frequency range, FR) 1 in Table 4 above together occupy 4 bits. These bits can be used according to the following rules:

[0259] Among the above 6 bits or 4 bits, 1 bit is denoted as B1, and B1 indicates whether the SSB is a Non-CD-SSB for the REDCAP terminal device (for the judgment in step S2 above). For example, when B1 = 1, it means that the SSB is a Non-CD-SSB for the REDCAP terminal device, and when B1 = 0, it means that the SSB is a CD-SSB for the REDCAP terminal device.

[0260] In addition to B1 among the 6 bits, there are 5 bits remaining, and in addition to B1 among the 4 bits, there are 3 bits remaining. Then the 5 bits or 3 bits are denoted as B2, and B2 can represent the following two meanings:

[0261] If B1 = 1, that is, when the SSB is a Non-CD-SSB for the REDCAP terminal device, B2 indicates an offset value relative to the new SSB frequency point of the traditional terminal device, which is used for the REDCAP terminal device to jump to the CD-SSB of the REDCAP terminal device.

[0262] If B1 = 0, that is, when the SSB is a CD-SSB for the REDCAP terminal device, B2 is used to indicate CORESET#0 and / or CSS, so that the REDCAP terminal device searches for the DCI scrambled by the system information radio network temporary indicator (SI-RNTI) within the indicated time-frequency range. After the DCI is searched, SIB1, etc. are obtained according to the indication of the DCI.

[0263] In the embodiments of the present application, the B2 bit is used to indicate the frequency information of the CD-SSB of the REDCAP terminal device. For example, the B2 bit represents an offset of a GSCN, and B2 can be the aforementioned first bit and second bit.

[0264] In the embodiments of the present application, the B2 bit is used to indicate CORESET#0 and / or CSS to the REDCAP terminal device, and any of the following methods can be used:

[0265] Method 1: CORESET#0 is a value predefined by the protocol, and the B2 bit is used to indicate CSS.

[0266] Method 2: CSS is a value predefined by the protocol, and the B2 bit is used to indicate CORESET#0.

[0267] Method 3: B2 = B21 + B22, where the B21 bit in the B2 bit indicates CORESET#0, the B22 bit indicates CSS, and B21 and B22 are integers greater than or equal to zero.

[0268] Among the above three methods, indicating CORESET#0 and / or CSS can be implemented by looking up a table. Method 1 and Method 2 can be regarded as special cases of Method 3. For unified description, the following uses X bits to represent the number of bits used to indicate CORESET#0, and Y bits to represent the number of bits used to indicate CSS. Then X + Y = B2, and X and Y are integers greater than or equal to zero.

[0269] The following introduces the method of looking up a table to determine CORESET#0 and CSS. For example, Table 5 is used to determine CORESET#0, and Table 6 is used to determine CSS.

[0270] Table 5

[0271]

[0272] In the embodiments of the present application, a table as shown in Table 5 can be defined, and X bits are used to indicate one of the first 2 X rows. For example, 2 bits indicate one of the first 4 rows to indicate the time-frequency multiplexing mode of the SSB and CORESET#0, the number of resource blocks occupied by CORESET#0 (Number of RBs), the number of symbols occupied by CORESET#0 (Number of Symbols), and the frequency-domain offset (Offset) between the SSB and CORESET#0. For example, the frequency-domain offset between the SSB and CORESET#0 is the resource block (RB) offset of the lowest frequency points of both the SSB and CORESET#0, and thus the frequency resource position of CORESET#0 is determined. For example, if the network device indicates the second row (index = 1) in Table 5, the multiplexing pattern of the SSB and CORESET#0 is Pattern 1 shown in the second column of Table 5, the number of RB resources occupied by CORESET#0 is 24 RBs, the number of symbols occupied by CORESET#0 is 2, and the frequency-domain offset between the SSB and CORESET#0 is 2 RBs, then the indicated CORESET#0 frequency-domain position and length are as Figure 4 shown. In addition, different types of terminal devices can use different 2 X rows in the table shown in Table 5 to indicate the CORESET#0 parameters. For example, the CORESET#0 parameters obtained by the second terminal device are indicated by one of the first 2 X rows, and the CORESET#0 parameters obtained by the first terminal device are indicated by another one of the last 2 X rows.

[0273] In addition, the terminal device can also determine the CSS by using the table as shown in Table 6 below.

[0274] Table 6

[0275]

[0276]

[0277] Similarly, in the embodiments of the present application, a table as shown in Table 6 can be defined in the protocol, and Y bits are used to indicate one of the first 2 YOne of the rows. For example, 3 bits indicate one of the first 8 rows. The information of this row can indicate the number of search space sets per slot, and indicate parameters O and M, so that the terminal device can calculate n0 according to and then obtain the starting time slot of the CSS in the frame where the SSB is located, which is the (n0 + 1)-th time slot; the protocol stipulates that the CSS occupies two consecutive time slots, that is, it occupies the (n0 + 1)-th time slot and the (n0 + 2)-th time slot. Where i represents the Index of the SSB, and μ is a parameter indicating the subcarrier spacing. When μ = 0, the subcarrier spacing is 15 kHz, and when μ = 1, the subcarrier spacing is 30 kHz, and so on. In addition, different types of terminal devices can use different 2 Y rows to indicate the CSS parameters. For example, the CSS parameters obtained by the second terminal device are indicated by one of the first 2 Y rows, and the CSS parameters obtained by the first terminal device are indicated by another one of the last 2 Y rows.

[0278] As shown in Table 6 above, it also indicates the first symbol index of the search space in the time slot, and thus determines the CSS, as Figure 5 shown. For example, if the network device indicates the third row (index = 2) in Table 6, then for SSB index = 1 (i = 1) and SCS = 15 kHz (μ = 0), n0 = (2 * 2 0 + 1 * 1) = 3, that is, the CSS starts from the 4th of the frame where the SSB is located and occupies two consecutive time slots. In each of these two frames, the first symbol is the starting symbol of CORESET#0. Within the frequency range and symbol range determined by CORESET#0, search for the PDCCH, that is, search for the DCI scrambled by SI-RNTI.

[0279] It is not limited that in the embodiments of the present application, Table 5 and Table 6 can also be used simultaneously to determine CORESET#0 and / or CSS indicated by the network device to the REDCAP terminal device.

[0280] The current terminal device cannot obtain SIB1 using Non-CD-SSB. In the embodiments of the present application, the REDCAP terminal device accesses the network through the Non-CD-SSB of the traditional terminal device, and the REDCAP terminal device jumps to a CD-SSB different from that of the traditional terminal device. By determining the information bits in the PBCH or MIB of the Non-CD-SSB that are meaningless to the traditional terminal device, these bits are used to indicate whether the REDCAP terminal device needs to jump, and to indicate the GSCN of the new SSB to jump to or the CORESET#0 and CSS when not jumping, achieving the technical effect of not affecting the behavior of the traditional terminal device and supporting the REDCAP terminal device to access the network through the Non-CD-SSB.

[0281] In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspectives of the network device, the terminal device, and the interaction between the network device and the terminal device. To implement the various functions in the methods provided in the embodiments of the present application, the network device and the terminal device may include a hardware structure and / or a software module, and implement the above various functions in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module. Whether a certain function among the above various functions is executed in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module depends on the specific application and configuration constraints of the technical solution.

[0282] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present application are not limited by the described action sequence, because according to the embodiments of the present application, certain steps may be performed in other sequences or simultaneously.

[0283] To facilitate better implementation of the above solutions in the embodiments of the present application, the following also provides related devices for implementing the above solutions.

[0284] Please refer to Figure 6 As shown, a communication device provided in the embodiments of the present application. The communication device may be a terminal device, or a device in the terminal device, or a device that can be used in matching with the terminal device. Figure 6 Taking the communication device as the terminal device 600 as an example, for example, the terminal device 600 may be the aforementioned second terminal device. The terminal device 600 may include: a transceiver module 601 and a processing module 602.

[0285] In a possible implementation:

[0286] The transceiver module is used to receive a first synchronization signal block SSB from the network device, where the first SSB is the first type of SSB of the first terminal device;

[0287] A processing module, configured to determine a first control resource set and / or a first common search space according to the first SSB if the first SSB is a second type of SSB of a second terminal device.

[0288] In a possible implementation: a transceiver module, configured to receive a second SSB from the network device if the first SSB is a first type of SSB of the second terminal device, and the processing module is configured to determine a second control resource set and / or a second common search space according to the second SSB.

[0289] In a possible implementation: the first SSB includes first indication information, where

[0290] when the first indication information is a first value, the first indication information is used to indicate that the first SSB is a second type of SSB of the second terminal device;

[0291] when the first indication information is a second value, the first indication information is used to indicate that the first SSB is a first type of SSB of the second terminal device.

[0292] In a possible implementation: the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0293] In a possible implementation: the first SSB further includes second indication information, where

[0294] the second indication information is used to indicate offset information of a second SSB.

[0295] In a possible implementation: the offset information of the second SSB includes: first offset information of the global synchronization channel number GSCN of the second SSB relative to the GSCN of the first SSB;

[0296] the second indication information includes a first bit and a second bit, where

[0297] the second bit is used to indicate the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0298] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0299]

[0300] where, the is the GSCN of the second SSB, the Indicates the GSCN of the first SSB, the Indicates a first offset, where a is the value indicated by the first bit, and the value of a is 1 or -1, and n is an adjustment coefficient, the Indicates the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0301] In a possible implementation: The offset information of the second SSB includes: the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0302] The second indication information includes a first bit and a second bit, where

[0303] The second bit is used to indicate the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0304] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0305]

[0306] where the is the GSCN of the second SSB, the Indicates the GSCN of the first SSB, where a is the value indicated by the first bit, and the value of a is 1 or -1, and n is an adjustment coefficient, the Indicates the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0307] In a possible implementation: The offset information of the second SSB includes: the GSCN offset of the second SSB;

[0308] The second indication information includes a first bit and a second bit, where

[0309] The first bit is used to indicate that the GSCN offset of the second SSB is a positive offset or the GSCN offset of the second SSB is a negative offset;

[0310] The second bit is used to indicate the GSCN offset of the second SSB;

[0311] The frequency range of the second SSB is:

[0312]

[0313] where the is the GSCN of the first SSB, the is the starting value of GSCN, where b is the value indicated by the first bit, and the value of b is 1 or -1, n is the adjustment coefficient, and the is the ending value of GSCN, and the represents the GSCN offset of the second SSB.

[0314] In a possible implementation: the second indication information is carried by at least one of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB.

[0315] In a possible implementation: the first SSB includes third indication information, where

[0316] the third indication information is used to indicate the first control resource set and / or the first common search space.

[0317] In a possible implementation: the third indication information is carried by at least one of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB.

[0318] In a possible implementation:

[0319] a processing module, configured to receive a first synchronization signal block SSB from a network device through a transceiver module, where the first SSB is a first type of SSB of a first terminal device;

[0320] the processing module, if the first SSB is the first type of SSB of the second terminal device, is configured to receive a second SSB from the network device through the transceiver module, and determine a second control resource set and / or a second common search space according to the second SSB;

[0321] wherein, the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device;

[0322] wherein, the first indication information is carried by at least one of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB.

[0323] Please refer to Figure 7 as shown, a communication device provided in an embodiment of the present application. The communication device may be a network device, or a device in the network device, or a device that can be used in matching with the network device. Figure 7The communication device is illustrated by taking the network device 700 as an example. The network device 700 may include: a transceiver module 701 and a processing module 702.

[0324] In a possible implementation:

[0325] The processing module is configured to send a first synchronization signal block SSB to a second terminal device through the transceiver module, where the first SSB is a first type of SSB of a first terminal device;

[0326] Wherein, if the first SSB is a second type of SSB of the second terminal device, the first SSB is used to indicate a first control resource set and / or a first common search space to the second terminal device.

[0327] In a possible implementation: The transceiver module is configured to send a second SSB to the second terminal device;

[0328] Wherein, if the first SSB is the first type of SSB of the second terminal device, the second SSB is used to indicate a second control resource set and / or a second common search space to the second terminal device.

[0329] In a possible implementation: The first SSB includes first indication information, where

[0330] When the first indication information is a first value, the first indication information is used to indicate that the first SSB is the second type of SSB of the second terminal device;

[0331] When the first indication information is a second value, the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device.

[0332] In a possible implementation: The first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0333] In a possible implementation: The first SSB further includes second indication information, where

[0334] The second indication information is used to indicate offset information of the second SSB.

[0335] In a possible implementation: The offset information of the second SSB includes: first offset information of the global synchronization channel number GSCN of the second SSB relative to the GSCN of the first SSB;

[0336] The second indication information includes a first bit and a second bit, where

[0337] The second bit is used to indicate first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0338] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0339]

[0340] Wherein, the is the GSCN of the second SSB, the represents the GSCN of the first SSB, the represents a first offset, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, and the represents the first offset information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0341] In a possible implementation: the offset information of the second SSB includes: second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0342] The second indication information includes a first bit and a second bit, wherein,

[0343] The second bit is used to indicate the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB;

[0344] The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship:

[0345]

[0346] Wherein, the is the GSCN of the second SSB, the represents the GSCN of the first SSB, a is the value indicated by the first bit, the value of a is 1 or -1, n is an adjustment coefficient, and the represents the second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB.

[0347] In a possible implementation: the offset information of the second SSB includes: the GSCN offset of the second SSB;

[0348] The second indication information includes a first bit and a second bit, wherein,

[0349] The first bit is used to indicate that the GSCN offset of the second SSB is a positive offset or the GSCN offset of the second SSB is a negative offset;

[0350] The second bit is used to indicate the GSCN offset of the second SSB;

[0351] The frequency range of the second SSB is:

[0352]

[0353] wherein, the is the GSCN of the first SSB, the is the GSCN start value, b is the value indicated by the first bit, the value of b is 1 or -1, n is an adjustment coefficient, the is the GSCN end value, and the represents the GSCN offset of the second SSB.

[0354] In a possible implementation: the second indication information is carried by at least one of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB.

[0355] In a possible implementation: the first SSB includes third indication information, wherein the third indication information is used to indicate the first control resource set and / or the first common search space.

[0356] In a possible implementation: the third indication information is carried by at least one of the common subcarrier spacing field, demodulation reference signal type A position field, intra-frequency reselection field, idle field, and reserved field corresponding to frequency range FR1 in the first SSB.

[0357] In a possible implementation:

[0358] The processing module is configured to send a first synchronization signal block SSB to a second terminal device through a transceiver module, where the first SSB is the first type of SSB of the first terminal device;

[0359] The processing module is configured to send a second SSB to the second terminal device through the transceiver module;

[0360] wherein, the second SSB is used to indicate a second control resource set and / or a second common search space to the second terminal device;

[0361] Among them, the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is a first type of SSB of the second terminal device;

[0362] Among them, the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-band reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

[0363] As Figure 8 Shown is a device 800 provided by an embodiment of the present application, which is used to implement the functions of the second terminal device in the above method. The device may be the second terminal device, or a device in the second terminal device, or a device that can be used in matching with the second terminal device. Among them, the device may be a chip system. In the embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. The device 800 includes at least one processor 820, which is used to implement the functions of the second terminal device in the method provided by the embodiment of the present application. Exemplarily, the processor 820 may receive information such as downlink control information and configuration information of a control resource set, and parse the above information. For specific details, refer to the detailed description in the method example, which will not be elaborated here.

[0364] The device 800 may further include at least one memory 830, which is used to store program instructions and / or data. The memory 830 is coupled to the processor 820. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 820 may cooperate with the memory 830. The processor 820 may execute the program instructions stored in the memory 830. At least one of the at least one memory may be included in the processor. The device 800 may further include a communication interface, and there are various implementation manners of the communication interface. For example, the communication interface may be a transceiver, an interface, a bus, a circuit, a pin or a device capable of implementing a transceiver function. Figure 8 Taking the communication interface as a transceiver 810 as an example for illustration, the transceiver 810 is used to communicate with other devices through a transmission medium, so that the devices in the device 800 can communicate with other devices. Exemplarily, the other device may be a network device. The processor 820 uses the transceiver 810 to send and receive data, and is used to implement Figure 1 the method executed by the second terminal device in the corresponding embodiment.

[0365] In the embodiment of the present application, the specific connection medium between the above transceiver 810, processor 820 and memory 830 is not limited. The embodiment of the present application is in Figure 8In the figure, a memory 830, a processor 820, and a transceiver 810 are connected through a bus 840. The bus is represented by a thick line in Figure 8 the figure. The connection manners between other components are only for illustrative purposes and are not limited thereto. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of easy representation, Figure 8 in the figure, it is only represented by a thick line, but it does not mean that there is only one bus or one type of bus.

[0366] Such as Figure 9 shown in the figure is a device 900 provided by an embodiment of the present application, which is used to implement the functions of the network device in the above method. The device can be a network device, or a device in a network device, or a device that can be used in combination with a network device. Among them, the device can be a chip system. The device 900 includes at least one processor 920, which is used to implement the functions of the network device in the method provided by the embodiment of the present application. Exemplarily, the processor 920 can generate and send downlink control information, configuration information of a control resource set, and other information. For specific details, please refer to the detailed description in the method example, which will not be elaborated here.

[0367] The device 900 may further include at least one memory 930, which is used to store program instructions and / or data. The memory 930 is coupled to the processor 920. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, and is used for information interaction between devices, units, or modules. The processor 920 may cooperate with the memory 930. The processor 920 may execute the program instructions stored in the memory 930. At least one of the at least one memory may be included in the processor. The device 900 may further include a communication interface, and there are various implementation manners for the communication interface. For example, the communication interface can be a transceiver, an interface, a bus, a circuit, or a device capable of implementing a transceiver function. Figure 9 In the figure, the communication interface is taken as a transceiver 99 for example. The transceiver 99 is used to communicate with other devices through a transmission medium, so that the device in the device 900 can communicate with other devices. Exemplarily, the other device can be a terminal device. The processor 920 uses the transceiver 910 to send and receive data and is used to implement Figure 1 the method executed by the network device described in the corresponding embodiment.

[0368] In the embodiment of the present application, the specific connection medium between the transceiver 910, the processor 920, and the memory 930 is not limited. In the embodiment of the present application Figure 9 in the figure, a memory 930, a processor 920, and a transceiver 910 are connected through a bus 940. The bus is in Figure 9The connection among them is represented by a thick line, and the connection manners among other components are only for illustrative purposes and are not limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 9 it is only represented by a thick line in the figure, but it does not mean that there is only one bus or one type of bus.

[0369] In the embodiments of the present application, the processor can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0370] In the embodiments of the present application, the memory can be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or can also be a volatile memory, such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in the embodiments of the present application can also be a circuit or any other device capable of implementing a storage function, for storing program instructions and / or data.

[0371] The technical solutions provided by the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available media can be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as digital video discs (DVDs)), or semiconductor media, etc.

[0372] In the embodiments of the present application, on the premise of no logical contradiction, the embodiments can be cited from each other. For example, the methods and / or terms between method embodiments can be cited from each other. For example, the functions and / or terms between device embodiments can be cited from each other. For example, the functions and / or terms between device embodiments and method embodiments can be cited from each other.

[0373] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A method for transmitting a synchronization signal block, characterized in that including: The second terminal device receives a first Synchronization Signal Block (SSB) from a network device, where the first SSB is a first type of SSB of a first terminal device; If the first SSB is a first type of SSB of the first terminal device and a second type of SSB of the second terminal device, the second terminal device determines a first control resource set and / or a first common search space according to the first SSB; The first SSB includes first indication information, and a first value of the first indication information is used to indicate that the first SSB is the second type of SSB of the second terminal device.

2. The method according to claim 1, wherein The first indication information is carried by at least one of a common subcarrier spacing field, a Demodulation Reference Signal (DMRS) type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to Frequency Range 1 (FR1) in the first SSB.

3. The method according to any one of claims 1 to 2, characterized in that The second terminal device determining a first control resource set and / or a first common search space according to the first SSB includes: The second terminal device determines the first control resource set and / or the first common search space through at least one of a common subcarrier spacing field, a DMRS type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to FR1 in the first SSB.

4. A method for transmitting a synchronization signal block, characterized in that, including: The second terminal device receives a first Synchronization Signal Block (SSB) from a network device, where the first SSB is a first type of SSB of a first terminal device; If the first SSB is a first type of SSB of the first terminal device and a first type of SSB of the second terminal device, the second terminal device receives a second SSB from the network device and determines a second control resource set and / or a second common search space according to the second SSB; wherein, the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device; wherein, the first indication information is carried by at least one of a common subcarrier spacing field, a DMRS type A position field, an in-frequency reselection field, an idle field, and a reserved field corresponding to FR1 in the first SSB.

5. The method according to claim 4, wherein The first SSB further includes second indication information, wherein, the second indication information is used to indicate offset information of the second SSB.

6. The method according to claim 5, wherein The offset information of the second SSB includes: first offset information of the Global Synchronization Channel Number (GSCN) of the second SSB relative to the GSCN of the first SSB; The second indication information includes a first bit and a second bit, wherein, the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship: ， Among them, the is the GSCN of the second SSB, and the represents the GSCN of the first SSB. The represents a first offset. The value of a is indicated by the first bit, and the value of a is 1 or -1. The n is an adjustment coefficient, and the is the value indicated by the second bit.

7. The method according to claim 5, wherein The offset information of the second SSB includes: second offset information of the GSCN of the second SSB relative to the GSCN of the first SSB; The second indication information includes a first bit and a second bit, wherein, the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship: ， Among them, the is the GSCN of the second SSB, the represents the GSCN of the first SSB, a is the value indicated by the first bit, the value of a is 1 or -1, n is the adjustment coefficient, and the is the value indicated by the second bit.

8. The method according to claim 5, wherein The offset information of the second SSB includes: the GSCN offset of the second SSB; The second indication information includes a first bit and a second bit, where the frequency range of the second SSB is: ， Among them, the is the GSCN of the first SSB, the is the GSCN starting value, b is the value indicated by the first bit, the value of b is 1 or -1, n is the adjustment coefficient, the is the GSCN ending value, and the is the value indicated by the second bit.

9. The method according to any one of claims 5 to 8, characterized in that, the second indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-band reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

10. A method for transmitting a synchronization signal block, characterized in that including: A network device sends a first synchronization signal block SSB to a second terminal device, where the first SSB is a first type of SSB of a first terminal device; wherein, if the first SSB is a second type of SSB of the second terminal device, the first SSB is used to indicate a first control resource set and / or a first common search space to the second terminal device; The first SSB includes first indication information, and a first value of the first indication information is used to indicate that the first SSB is the second type of SSB of the second terminal device.

11. The method according to claim 10, characterized in that, The first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-band reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

12. The method according to any one of claims 10 to 11, characterized in that, At least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-band reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB is used to indicate the first control resource set and / or the first common search space.

13. A method for transmitting a synchronization signal block, characterized in that including: A network device sends a first synchronization signal block SSB to a second terminal device, where the first SSB is a first type of SSB of a first terminal device; if the first SSB is a first type of SSB of the first terminal device and a first type of SSB of the second terminal device, the network device sends a second SSB to the second terminal device; wherein, the second SSB is used to indicate a second control resource set and / or a second common search space to the second terminal device; wherein, the first SSB includes first indication information, and a second value of the first indication information is used to indicate that the first SSB is the first type of SSB of the second terminal device; wherein, the first indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-band reselection field, an idle field, and a reserved field corresponding to frequency range FR1 in the first SSB.

14. The method according to claim 13, characterized in that, The first SSB further includes second indication information, where the second indication information is used to indicate offset information of the second SSB.

15. The method according to claim 14, wherein The offset information of the second SSB includes: a first offset amount information of the global synchronization channel number GSCN of the second SSB relative to the GSCN of the first SSB; The second indication information includes a first bit and a second bit, where the GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship: ， Among them, the is the GSCN of the second SSB, and the represents the GSCN of the first SSB. The represents the first offset. a is the value indicated by the first bit, and the value of a is 1 or -1. n is an adjustment coefficient, and the is the value indicated by the second bit.

16. The method according to claim 14, characterized in that, The offset information of the second SSB includes: a second offset amount information of the GSCN of the second SSB relative to the GSCN of the first SSB; The second indication information includes a first bit and a second bit, where The GSCN of the second SSB and the GSCN of the first SSB satisfy the following relationship: ， Among them, the is the GSCN of the second SSB, and the represents the GSCN of the first SSB. The value of a is the value indicated by the first bit, and the value of a is 1 or -1. The n is an adjustment coefficient, and the is the value indicated by the second bit.

17. The method according to claim 14, wherein The offset information of the second SSB includes: the GSCN offset of the second SSB; The second indication information includes a first bit and a second bit, where The frequency range of the second SSB is: ， Among them, the is the GSCN of the first SSB, the is the GSCN starting value, b is the value indicated by the first bit, the value of b is 1 or -1, n is the adjustment coefficient, the is the GSCN ending value, the is the value indicated by the second bit.

18. The method according to any one of claims 14 to 17, characterized in that The second indication information is carried by at least one of a common subcarrier spacing field, a demodulation reference signal type A position field, an in-band reselection field, an idle field, and a reserved field corresponding to the frequency range FR1 in the first SSB.

19. A communication device, characterized in that, including: a transceiver module and a processing module; The transceiver module and the processing module are used to enable the communication device to implement the method according to any one of claims 1 to 18.

20. A communication device, including a processor and a memory, the memory is coupled to the processor, and the processor is used to execute the method according to any one of claims 1 to 18.

21. A computer-readable storage medium, including instructions, when it runs on a computer, enables the computer to execute the method according to any one of claims 1 to 18.

22. A computer program product, including instructions, when the instructions run on a computer, the computer can execute the method according to any one of claims 1 to 18.

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